WARNING in trace_hardirqs_off_thunk

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 1d2cc5ac Merge tag 'riscv-for-linus-5.7-rc4' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1138423fe00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5b075813ec8b93cd
dashboard link: https://syzkaller.appspot.com/bug?extid=c5b4c665cbbc54146348
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

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

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c5b4c6...@syzkaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!irqs_disabled())
WARNING: CPU: 1 PID: 3137 at kernel/locking/lockdep.c:3721 lockdep_hardirqs_off+0x24d/0x2d0 kernel/locking/lockdep.c:3721
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 3137 Comm: syz-executor.2 Not tainted 5.7.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
panic+0x2e3/0x75c kernel/panic.c:221
__warn.cold+0x2f/0x35 kernel/panic.c:582
report_bug+0x27b/0x2f0 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:175 [inline]
fixup_bug arch/x86/kernel/traps.c:170 [inline]
do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:lockdep_hardirqs_off+0x24d/0x2d0 kernel/locking/lockdep.c:3721
Code: 08 84 d2 0f 85 8f 00 00 00 8b 15 0e c3 2f 09 85 d2 0f 85 79 ff ff ff 48 c7 c6 40 99 2b 88 48 c7 c7 40 98 2b 88 e8 db ad ea ff <0f> 0b e9 5f ff ff ff 48 c7 c7 d4 7e 89 8a e8 e0 3e 57 00 e9 d9 fd
RSP: 0018:ffffc9000811fee0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888059452180 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815ce171 RDI: fffff52001023fce
RBP: ffffffff81007652 R08: ffff888059452180 R09: fffffbfff1336709
R10: ffffffff899b3843 R11: fffffbfff1336708 R12: ffff888059452180
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
trace_hardirqs_off_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:42
entry_SYSCALL_64_after_hwframe+0x3e/0xb3
RIP: 0033:0x7f8a389e9469
Code: 00 f3 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 8b 0d ff 49 2b 00 f7 d8 64 89 01 48
RSP: 002b:0000000000bbfbe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000006abf0c RCX: 00007f8a389e9469
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000006abf08
RBP: 00000000006abf00 R08: 00000000006b0120 R09: 0000000000000000
R10: 0000000000bbfcc0 R11: 0000000000000246 R12: 00000000006b00b0
R13: 0000000000000000 R14: 0000000000000391 R15: 00000000006abf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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[Dmitry Vyukov]

#syz upstream

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