Date:   Thu, 11 Mar 2021 16:37:11 -0800
From:   syzbot <syzbot+7d7013084f0a806f3786@...kaller.appspotmail.com>
To:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com, seanjc@...gle.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: [syzbot] WARNING in handle_mm_fault

Hello,

syzbot found the following issue on:

HEAD commit:    05a59d79 Merge git://git.kernel.org:/pub/scm/linux/kernel/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16f493ead00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=750735fdbc630971
dashboard link: https://syzkaller.appspot.com/bug?extid=7d7013084f0a806f3786

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+7d7013084f0a806f3786@...kaller.appspotmail.com

------------[ cut here ]------------
raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 0 PID: 8412 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: 8412 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 11 d1 ad 04 00 74 01 c3 48 c7 c7 20 79 6b 89 c6 05 00 d1 ad 04 01 e8 75 5b 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:ffffc9000185fac8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880194268a0 RCX: 0000000000000000
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
R13: ffffed1003284d14 R14: 0000000000000001 R15: ffff8880b9c36000
FS:  000000c00002ec90(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
Call Trace:
 handle_mm_fault+0x1bc/0x7e0 mm/memory.c:4549
Code: 48 8d 05 97 25 3e 00 48 89 44 24 08 e8 6d 54 ea ff 90 e8 07 a1 ed ff eb a5 cc cc cc cc cc 8b 44 24 10 48 8b 4c 24 08 89 41 24 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b
RAX: 00000000000047f6 RBX: 00000000000047f6 RCX: 0000000000d60000
RDX: 0000000000004c00 RSI: 0000000000d60000 RDI: 000000000181cad0
RBP: 000000c000301890 R08: 00000000000047f5 R09: 000000000059c5a0
R10: 000000c0004e2000 R11: 0000000000000020 R12: 00000000000000fa
R13: 00aaaaaaaaaaaaaa R14: 000000000093f064 R15: 0000000000000038
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8412 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
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 panic+0x306/0x73d kernel/panic.c:231
 __warn.cold+0x35/0x44 kernel/panic.c:605
 report_bug+0x1bd/0x210 lib/bug.c:195
 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:259
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:575
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 11 d1 ad 04 00 74 01 c3 48 c7 c7 20 79 6b 89 c6 05 00 d1 ad 04 01 e8 75 5b 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:ffffc9000185fac8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880194268a0 RCX: 0000000000000000
RDX: ffff88802f7b2400 RSI: ffffffff815b4435 RDI: fffff5200030bf4b
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815ad19e R11: 0000000000000000 R12: 0000000000000003
R13: ffffed1003284d14 R14: 0000000000000001 R15: ffff8880b9c36000
 kvm_wait arch/x86/kernel/kvm.c:860 [inline]
 kvm_wait+0xc9/0xe0 arch/x86/kernel/kvm.c:837
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
 spin_lock include/linux/spinlock.h:354 [inline]
 pmd_lock include/linux/mm.h:2264 [inline]
 huge_pmd_set_accessed+0x103/0x320 mm/huge_memory.c:1265
 __handle_mm_fault+0xeeb/0x4f70 mm/memory.c:4445
 handle_mm_fault+0x1bc/0x7e0 mm/memory.c:4549
 do_user_addr_fault+0x483/0x1210 arch/x86/mm/fault.c:1390
 handle_page_fault arch/x86/mm/fault.c:1475 [inline]
 exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577
RIP: 0033:0x59072c
Code: 48 8d 05 97 25 3e 00 48 89 44 24 08 e8 6d 54 ea ff 90 e8 07 a1 ed ff eb a5 cc cc cc cc cc 8b 44 24 10 48 8b 4c 24 08 89 41 24 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b
RSP: 002b:000000c0003017b0 EFLAGS: 00010246
RAX: 00000000000047f6 RBX: 00000000000047f6 RCX: 0000000000d60000
RDX: 0000000000004c00 RSI: 0000000000d60000 RDI: 000000000181cad0
RBP: 000000c000301890 R08: 00000000000047f5 R09: 000000000059c5a0
R10: 000000c0004e2000 R11: 0000000000000020 R12: 00000000000000fa
R13: 00aaaaaaaaaaaaaa R14: 000000000093f064 R15: 0000000000000038
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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