BUG: soft lockup in mrp_join_timer (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 2965db2e Linux 4.19.188
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17cfbe91d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=66e717310a9b0f81
dashboard link: https://syzkaller.appspot.com/bug?extid=6bc0a108308bcfde150e

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+6bc0a1...@syzkaller.appspotmail.com

ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.3:11659]
Modules linked in:
irq event stamp: 6243555
hardirqs last enabled at (6243554): [<ffffffff81003ce4>] trace_hardirqs_on_thunk+0x1a/0x1c
hardirqs last disabled at (6243555): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last enabled at (438): [<ffffffff88400678>] __do_softirq+0x678/0x980 kernel/softirq.c:318
softirqs last disabled at (2513): [<ffffffff813926d5>] invoke_softirq kernel/softirq.c:372 [inline]
softirqs last disabled at (2513): [<ffffffff813926d5>] irq_exit+0x215/0x260 kernel/softirq.c:412
CPU: 0 PID: 11659 Comm: syz-executor.3 Not tainted 4.19.188-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100
Code: e8 61 c1 35 00 e9 ab fe ff ff 4c 89 ef e8 54 c1 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 80 df 01 00 65 8b 15 3c 81 9f 7e 81 e2 00 01 1f 00
RSP: 0018:ffff8880ba007b38 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: ffff88820e8d2240 RBX: ffffffff8ae61cc0 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff866fe5d6 RDI: ffff888023bf8280
RBP: ffff888023bf8280 R08: 0000000000000000 R09: fffffbfff15cc3b5
R10: ffffffff8ae61dab R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8ae61df8 R14: ffffffff8ae61cd0 R15: ffff888023bf8280
FS: 00007f528fece700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f826000 CR3: 00000002335b3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
kfree_skb_list+0x16/0x60 net/core/skbuff.c:678
__dev_xmit_skb net/core/dev.c:3506 [inline]
__dev_queue_xmit+0x2973/0x2e00 net/core/dev.c:3807
mrp_queue_xmit net/802/mrp.c:354 [inline]
mrp_join_timer+0x8a/0xc0 net/802/mrp.c:598
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
irq_exit+0x215/0x260 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:535 [inline]
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97
Code: ff 48 89 df e8 61 c1 35 00 e9 ab fe ff ff 4c 89 ef e8 54 c1 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 80 df 01 00 65 8b 15 3c 81 9f 7e 81 e2
RSP: 0018:ffff88820debf3b0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000002 RBX: 0000000000000039 RCX: ffffffff83bcf7bc
RDX: 0000000000000039 RSI: ffff88820e8d2240 RDI: 0000000000000007
RBP: 0000000004000000 R08: 0000000000000000 R09: 000000000000ffff
R10: 0000000000000007 R11: 0000000000000000 R12: ffff88813be27200
R13: ffff88813be27200 R14: dffffc0000000000 R15: 0000000000000039
conv_uni_to_pc+0x2e/0x250 drivers/tty/vt/consolemap.c:819
do_con_write+0x5d1/0x1d90 drivers/tty/vt/vt.c:2723
con_write+0x22/0xb0 drivers/tty/vt/vt.c:3145
n_tty_write+0xa03/0xff0 drivers/tty/n_tty.c:2354
do_tty_write drivers/tty/tty_io.c:960 [inline]
tty_write+0x496/0x810 drivers/tty/tty_io.c:1044
__vfs_write+0xf7/0x770 fs/read_write.c:485
__kernel_write+0x109/0x370 fs/read_write.c:506
write_pipe_buf+0x153/0x1f0 fs/splice.c:798
splice_from_pipe_feed fs/splice.c:503 [inline]
__splice_from_pipe+0x389/0x800 fs/splice.c:627
splice_from_pipe fs/splice.c:662 [inline]
default_file_splice_write+0xd8/0x180 fs/splice.c:810
do_splice_from fs/splice.c:852 [inline]
direct_splice_actor+0x115/0x160 fs/splice.c:1025
splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980
do_splice_direct+0x1a7/0x270 fs/splice.c:1068
do_sendfile+0x550/0xc30 fs/read_write.c:1447
__do_sys_sendfile64 fs/read_write.c:1508 [inline]
__se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x466459
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f528fece188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0800000080004105 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffec3a0861f R14: 00007f528fece300 R15: 0000000000022000
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60


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