[syzbot] WARNING in __handle_mm_fault (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 144c79ef Merge tag 'perf-tools-fixes-for-v5.12-2020-03-07'..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14747f1ed00000
kernel config: https://syzkaller.appspot.com/x/.config?x=3c825a7b7b408394
dashboard link: https://syzkaller.appspot.com/bug?extid=ce14a1f8667e17a759a5

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+ce14a1...@syzkaller.appspotmail.com

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raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 0 PID: 8390 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Modules linked in:
CPU: 0 PID: 8390 Comm: syz-fuzzer Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Code: be ff cc cc cc cc cc cc cc cc cc cc cc 80 3d bd 36 af 04 00 74 01 c3 48 c7 c7 a0 8f 6b 89 c6 05 ac 36 af 04 01 e8 87 ba be ff <0f> 0b c3 48 39 77 10 0f 84 97 00 00 00 66 f7 47 22 f0 ff 74 4b 48
RSP: 0000:ffffc90001b77ac8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880320435a0 RCX: 0000000000000000
RDX: ffff888025c20040 RSI: ffffffff815c0ef5 RDI: fffff5200036ef4b
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815b9c5e R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10064086b4 R14: 0000000000000001 R15: ffff8880b9c36000
FS: 000000c00002e490(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0002d4020 CR3: 000000001927f000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Call Trace:
__handle_mm_fault+0xeeb/0x4f70 mm/memory.c:4445
handle_mm_fault+0x1bc/0x7e0 mm/memory.c:4549
RIP: 0033:0x46d4d4
RAX: 0000000000000080 RBX: 0000000000011f60 RCX: 000000c0002e6000
RDX: 0000000000827a04 RSI: 000000c0002d4020 RDI: 000000c0004aa020
R10: 000000c00048c000 R11: 0000000000000020 R12: 00000000000000fa


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[syzbot]

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