general protection fault in skb_queue_tail (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 97db1b081e12 dt-bindings: usb: dwc3: Update dwc3 TX fifo p..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=12082402300000
kernel config: https://syzkaller.appspot.com/x/.config?x=db8b503c237253ee
dashboard link: https://syzkaller.appspot.com/bug?extid=bdede8cbed6a5cc48fbc
CC: [ath9k...@qca.qualcomm.com da...@davemloft.net ku...@kernel.org kv...@codeaurora.org linux-...@vger.kernel.org linux-w...@vger.kernel.org net...@vger.kernel.org linu...@vger.kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bdede8...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6766 Comm: kworker/0:4 Tainted: G W 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:__skb_insert include/linux/skbuff.h:1937 [inline]
RIP: 0010:__skb_queue_before include/linux/skbuff.h:2043 [inline]
RIP: 0010:__skb_queue_tail include/linux/skbuff.h:2076 [inline]
RIP: 0010:skb_queue_tail+0x9a/0x140 net/core/skbuff.c:3249
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7b 4c 89 e2 4c 89 65 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 48 89 6b 08 <80> 3c 02 00 75 4a 48 8d 7b 10 49 89 2c 24 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900000079d8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff88810ba436d0 RCX: ffffffff8128a2d0
RDX: 0000000000000000 RSI: 0000000000000012 RDI: ffff88814916aa08
RBP: ffff88814916aa00 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000000f29 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88810ba436e8 R14: 000000010001f030 R15: ffffffff8309e070
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd3d503d30 CR3: 0000000110a9f000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
ath9k_htc_txep+0x287/0x400 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:712
ath9k_htc_txcompletion_cb+0x1cd/0x2f0 drivers/net/wireless/ath/ath9k/htc_hst.c:348
hif_usb_regout_cb+0x115/0x1c0 drivers/net/wireless/ath/ath9k/hif_usb.c:90
__usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656
usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726
dummy_timer+0x11f9/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:1987
call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1417
expire_timers kernel/time/timer.c:1462 [inline]
__run_timers.part.0+0x675/0xa10 kernel/time/timer.c:1731
__run_timers kernel/time/timer.c:1712 [inline]
run_timer_softirq+0x80/0x120 kernel/time/timer.c:1744
__do_softirq+0x1b0/0x910 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x117/0x160 kernel/softirq.c:636
irq_exit_rcu+0x5/0x10 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x6a/0x90 arch/x86/kernel/apic/apic.c:1100
</IRQ>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:kcov_remote_stop+0x11b/0x390 kernel/kcov.c:1019
Code: 7e a9 00 01 ff 00 0f 84 22 01 00 00 48 85 db 0f 85 0f 01 00 00 9c 58 f6 c4 02 0f 85 7c 01 00 00 48 85 db 74 01 fb 48 83 c4 20 <4c> 89 e7 5b 5d 41 5c 41 5d 41 5e 41 5f e9 83 fe ff ff 8b 8d 44 14
RSP: 0018:ffffc90004a07ab0 EFLAGS: 00000282
RAX: 0000000000000046 RBX: 0000000000000200 RCX: 1ffffffff111e09d
RDX: 0000000000000000 RSI: ffffffff81477161 RDI: ffffffff814163ca
RBP: ffffc9001075d000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81477148 R11: ffffc9000b735000 R12: ffff888110c53200
R13: ffffc9001035b000 R14: 000000000003ff91 R15: 0000000000040000
hub_event+0xe28/0x4330 drivers/usb/core/hub.c:5713
process_one_work+0x98d/0x15b0 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3c0/0x4a0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace 115e465bafd046fa ]---
RIP: 0010:__skb_insert include/linux/skbuff.h:1937 [inline]
RIP: 0010:__skb_queue_before include/linux/skbuff.h:2043 [inline]
RIP: 0010:__skb_queue_tail include/linux/skbuff.h:2076 [inline]
RIP: 0010:skb_queue_tail+0x9a/0x140 net/core/skbuff.c:3249
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7b 4c 89 e2 4c 89 65 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 48 89 6b 08 <80> 3c 02 00 75 4a 48 8d 7b 10 49 89 2c 24 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900000079d8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff88810ba436d0 RCX: ffffffff8128a2d0
RDX: 0000000000000000 RSI: 0000000000000012 RDI: ffff88814916aa08
RBP: ffff88814916aa00 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000000f29 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88810ba436e8 R14: 000000010001f030 R15: ffffffff8309e070
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd3d503d30 CR3: 0000000110a9f000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.