[syzbot] BUG: soft lockup in tx

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syzbot

unread,

Sep 18, 2022, 1:29:33 AM9/18/22

to gre...@linuxfoundation.org, jiri...@kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com

Hello,

syzbot found the following issue on:

HEAD commit: a6b443748715 Merge branch 'for-next/core', remote-tracking..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=176b1680880000
kernel config: https://syzkaller.appspot.com/x/.config?x=14bf9ec0df433b27
dashboard link: https://syzkaller.appspot.com/bug?extid=5e87db90e68fbc4707c6
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b22b10880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fce87f080000

Downloadable assets:
disk image: https://storage.googleapis.com/81b491dd5861/disk-a6b44374.raw.xz
vmlinux: https://storage.googleapis.com/69c979cdc99a/vmlinux-a6b44374.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5e87db...@syzkaller.appspotmail.com

watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [aoe_tx0:1378]
Modules linked in:
irq event stamp: 34814405
hardirqs last enabled at (34814404): [<ffff80000bfd85d4>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (34814404): [<ffff80000bfd85d4>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (34814405): [<ffff80000bfc5d58>] __el1_irq arch/arm64/kernel/entry-common.c:455 [inline]
hardirqs last disabled at (34814405): [<ffff80000bfc5d58>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:473
softirqs last enabled at (8188): [<ffff80000b20ab54>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (8192): [<ffff80000b20ab20>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 0 PID: 1378 Comm: aoe_tx0 Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
pc : _raw_spin_unlock_irqrestore+0x58/0x8c kernel/locking/spinlock.c:194
lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
lr : _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
sp : ffff800014a53b80
x29: ffff800014a53b80 x28: ffff0000c4ea0c30 x27: 0000000000000000
x26: ffff80000f0ed9b8 x25: 0000000000000002 x24: 0000000000000001
x23: ffff0000c8bf38b0 x22: 0000000000000020 x21: 0000000000000001
x20: ffff80000f0ed9b8 x19: 0000000000000000 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c42b0000
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c42b0000
x11: ff808000095d7628 x10: 0000000000000000 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : ffff8000098f58f0 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : ffff80000ce5df15 x0 : ffff8001f1d2f000
Call trace:
arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
_raw_spin_unlock_irqrestore+0x58/0x8c kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
uart_write+0x204/0x458 drivers/tty/serial/serial_core.c:589
handle_tx+0x10c/0x34c drivers/net/caif/caif_serial.c:236
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:282
__netdev_start_xmit include/linux/netdevice.h:4819 [inline]
netdev_start_xmit include/linux/netdevice.h:4833 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0xd4/0x1ec net/core/dev.c:3606
__dev_queue_xmit+0x78c/0xc88 net/core/dev.c:4256
dev_queue_xmit include/linux/netdevice.h:3008 [inline]
tx+0x74/0x118 drivers/block/aoe/aoenet.c:63
kthread+0x90/0x154 kernel/kthread.c:357
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

Hillf Danton

unread,

Sep 18, 2022, 5:44:20 AM9/18/22

to syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com

On 17 Sep 2022 22:29:32 -0700

> syzbot found the following issue on:
>
> HEAD commit: a6b443748715 Merge branch 'for-next/core', remote-tracking..
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=176b1680880000
> kernel config: https://syzkaller.appspot.com/x/.config?x=14bf9ec0df433b27
> dashboard link: https://syzkaller.appspot.com/bug?extid=5e87db90e68fbc4707c6
> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b22b10880000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fce87f080000

See if caif uart has a soft hog.

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git a6b443748715

--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -210,6 +210,7 @@ static int handle_tx(struct ser_device *
struct tty_struct *tty;
struct sk_buff *skb;
int tty_wr, len, room;
+ unsigned long ts;

tty = ser->tty;
ser->tx_started = true;
@@ -218,8 +219,10 @@ static int handle_tx(struct ser_device *
if (test_and_set_bit(CAIF_SENDING, &ser->state))
return 0;

+ ts = jiffies;
/* skb_peek is safe because handle_tx is called after skb_queue_tail */
while ((skb = skb_peek(&ser->head)) != NULL) {
+ WARN_ON(jiffies > ts +2);

/* Make sure you don't write too much */
len = skb->len;
--

syzbot

unread,

Sep 18, 2022, 6:24:17 AM9/18/22

to hda...@sina.com, linux-...@vger.kernel.org, syzkall...@googlegroups.com

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in handle_tx

ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Not tainted 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc03
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc03
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

__netdev_start_xmit include/linux/netdevice.h:4819 [inline]
netdev_start_xmit include/linux/netdevice.h:4833 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0xd4/0x1ec net/core/dev.c:3606
__dev_queue_xmit+0x78c/0xc88 net/core/dev.c:4256
dev_queue_xmit include/linux/netdevice.h:3008 [inline]
tx+0x74/0x118 drivers/block/aoe/aoenet.c:63
kthread+0x90/0x154 kernel/kthread.c:357
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20

irq event stamp: 43337
hardirqs last enabled at (43336): [<ffff80000bfc5e38>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last enabled at (43336): [<ffff80000bfc5e38>] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (43337): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc08
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc08
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43345
hardirqs last enabled at (43344): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43344): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43345): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc0e
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc0e
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43353
hardirqs last enabled at (43352): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43352): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43353): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc13
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc13
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43361
hardirqs last enabled at (43360): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43360): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43361): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc19
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc19
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43369
hardirqs last enabled at (43368): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43368): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43369): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc1e
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc1e
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43377
hardirqs last enabled at (43376): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43376): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43377): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc24
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc24
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43385
hardirqs last enabled at (43384): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43384): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43385): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc29
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc29
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43393
hardirqs last enabled at (43392): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43392): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43393): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc2f
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc2f
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43401
hardirqs last enabled at (43400): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43400): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43401): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc34
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc34
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43409
hardirqs last enabled at (43408): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43408): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43409): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc3a
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc3a
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43417
hardirqs last enabled at (43416): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43416): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43417): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc40
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc40
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43425
hardirqs last enabled at (43424): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43424): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43425): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc45
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc45
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43433
hardirqs last enabled at (43432): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43432): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43433): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc4a
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc4a
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43441
hardirqs last enabled at (43440): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43440): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43441): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc50
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc50
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43449
hardirqs last enabled at (43448): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43448): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43449): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc56
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc56
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43457
hardirqs last enabled at (43456): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43456): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43457): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc5b
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc5b
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43465
hardirqs last enabled at (43464): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43464): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43465): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc61
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc61
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43473
hardirqs last enabled at (43472): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43472): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43473): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc66
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc66
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43481
hardirqs last enabled at (43480): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43480): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43481): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc6c
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc6c
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43489
hardirqs last enabled at (43488): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43488): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43489): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc71
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc71
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43497
hardirqs last enabled at (43496): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43496): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43497): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc77
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc77
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43505
hardirqs last enabled at (43504): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43504): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43505): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc7c
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc7c
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43513
hardirqs last enabled at (43512): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43512): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43513): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc81
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc81
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43521
hardirqs last enabled at (43520): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43520): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43521): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc87
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc87
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43529
hardirqs last enabled at (43528): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43528): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43529): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000
x26: 0000000000000000 x25: 0000000000000fff x24: 00000000ffffbc8c
x23: ffff0000cf09c200 x22: 00000000ffffbc02 x21: ffff0000cf296cb0
x20: ffff0000cf23e800 x19: ffff0000cf296c80 x18: 00000000000000c0
x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c6271a80
x14: 0000000000000028 x13: 00000000ffffffff x12: ffff0000c6271a80
x11: ff80800009e7d314 x10: 0000000000000000 x9 : ffff800009e7d314
x8 : ffff0000c6271a80 x7 : ffff8000098f58f0 x6 : 0000000000000000

x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000002 x1 : 00000000ffffbc02 x0 : 00000000ffffbc8c
Call trace:
handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
caif_xmit+0xa4/0xe0 drivers/net/caif/caif_serial.c:285

irq event stamp: 43537
hardirqs last enabled at (43536): [<ffff80000bfd660c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last enabled at (43536): [<ffff80000bfd660c>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
hardirqs last disabled at (43537): [<ffff80000bfc3cc4>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last enabled at (1392): [<ffff80000b207b84>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1396): [<ffff80000b207b50>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1377 at drivers/net/caif/caif_serial.c:225 handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
Modules linked in:
CPU: 0 PID: 1377 Comm: aoe_tx0 Tainted: G W 6.0.0-rc4-syzkaller-00071-ga6b443748715-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
lr : handle_tx+0x1ec/0x380 drivers/net/caif/caif_serial.c:225
sp : ffff80001477bc10
x29: ffff80001477bc10 x28: ffff80000f103000 x27: ffff80000d2bb000

Tested on:

commit: a6b44374 Merge branch 'for-next/core', remote-tracking..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=12c2ce64880000

kernel config: https://syzkaller.appspot.com/x/.config?x=14bf9ec0df433b27
dashboard link: https://syzkaller.appspot.com/bug?extid=5e87db90e68fbc4707c6
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

patch: https://syzkaller.appspot.com/x/patch.diff?x=14a541a0880000

Hillf Danton

unread,

Sep 18, 2022, 7:03:14 AM9/18/22

to syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com

On 17 Sep 2022 22:29:32 -0700

Remove the soft hog in caif uart.

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git a6b443748715

--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -210,6 +210,7 @@ static int handle_tx(struct ser_device *
struct tty_struct *tty;
struct sk_buff *skb;
int tty_wr, len, room;
+ unsigned long ts;

tty = ser->tty;
ser->tx_started = true;

@@ -218,8 +219,11 @@ static int handle_tx(struct ser_device *

if (test_and_set_bit(CAIF_SENDING, &ser->state))
return 0;

+ ts = jiffies + 2;

/* skb_peek is safe because handle_tx is called after skb_queue_tail */
while ((skb = skb_peek(&ser->head)) != NULL) {

+ if (jiffies > ts)
+ break;

syzbot

unread,

Sep 18, 2022, 7:33:23 AM9/18/22

to hda...@sina.com, linux-...@vger.kernel.org, syzkall...@googlegroups.com

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+5e87db...@syzkaller.appspotmail.com

Tested on:

commit: a6b44374 Merge branch 'for-next/core', remote-tracking..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git

console output: https://syzkaller.appspot.com/x/log.txt?x=146dded8880000

patch: https://syzkaller.appspot.com/x/patch.diff?x=13804ed5080000

Note: testing is done by a robot and is best-effort only.

Dmitry Vyukov

unread,

Sep 19, 2022, 12:50:38 AM9/19/22

to Hillf Danton, syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com

Hi Hillf,

I don't know if it's a good fix on its own or not,
but arm64 command line parsing is currently broken and does not allows
us to increase stall timeouts:
https://groups.google.com/g/syzkaller-bugs/c/QoFsDszFLxY/m/mnnUTKuJAAAJ
This may lead to some false stall reports (the timeout is 22s, but we
set it to 300s on syzbot).

Hillf Danton

unread,

Sep 19, 2022, 7:22:57 AM9/19/22

to Dmitry Vyukov, syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com

On 19 Sep 2022 06:50:25 +0200 Dmitry Vyukov wrote:
>
> I don't know if it's a good fix on its own or not,
> but arm64 command line parsing is currently broken and does not allows
> us to increase stall timeouts:
> https://groups.google.com/g/syzkaller-bugs/c/QoFsDszFLxY/m/mnnUTKuJAAAJ
> This may lead to some false stall reports (the timeout is 22s, but we
> set it to 300s on syzbot).

Hi Dmitry

Thanks for taking a look and sharing info about the 22s.

Since 22s may have huge difficulty meeting different tastes, it is not
too late to revisit the soft lockup after 300s clock in.

Best
Hillf

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