linux-kernel - [syzbot] [kernel?] WARNING in switch_mm_irqs

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Message-ID: <0000000000009da21f0614d6af2e@google.com>
Date: Fri, 29 Mar 2024 18:29:22 -0700
From: syzbot <syzbot+6096471e27db19305af0@...kaller.appspotmail.com>
To: bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com, 
	linux-kernel@...r.kernel.org, luto@...nel.org, mingo@...hat.com, 
	peterz@...radead.org, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, 
	x86@...nel.org
Subject: [syzbot] [kernel?] WARNING in switch_mm_irqs_off (2)

Hello,

syzbot found the following issue on:

HEAD commit:    4535e1a4174c x86/bugs: Fix the SRSO mitigation on Zen3/4
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=103340c5180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f64ec427e98bccd7
dashboard link: https://syzkaller.appspot.com/bug?extid=6096471e27db19305af0
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-4535e1a4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/af9b780d5ab6/vmlinux-4535e1a4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ca7710536ebc/bzImage-4535e1a4.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6096471e27db19305af0@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 4685 at arch/x86/mm/tlb.c:515 switch_mm_irqs_off+0x890/0xbc0 arch/x86/mm/tlb.c:515
Modules linked in:
CPU: 0 PID: 4685 Comm: udevd Not tainted 6.9.0-rc1-syzkaller-00206-g4535e1a4174c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:switch_mm_irqs_off+0x890/0xbc0 arch/x86/mm/tlb.c:515
Code: ff 44 8d 6b 02 48 63 d3 49 8d 8e 18 06 00 00 4d 63 ed 49 c1 e5 04 4d 8d 8d 80 d8 03 00 49 81 c5 88 d8 03 00 e9 75 fd ff ff 90 <0f> 0b 90 e9 e3 f7 ff ff 90 0f 0b 90 e8 df f5 ff ff e9 20 f8 ff ff
RSP: 0018:ffffc90006f27918 EFLAGS: 00010202
RAX: 0000000000000282 RBX: ffff88802a820000 RCX: ffff88802ce84280
RDX: 1ffff110059d092a RSI: ffffffff8b8f4760 RDI: ffffffff8b8f47a0
RBP: ffff888026402f80 R08: 0000000000000000 R09: ffffed10059d0869
R10: ffff88802ce8434b R11: 0000000000000002 R12: ffff88806b03f500
R13: ffff88804841a440 R14: ffff88802ce84280 R15: ffff88806b03ea40
FS:  00007f7782acf280(0000) GS:ffff88806b000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc60856070 CR3: 000000002a050000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5393 [inline]
 __schedule+0xd2b/0x5d00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6838
 schedule_hrtimeout_range_clock+0x20f/0x430 kernel/time/hrtimer.c:2312
 ep_poll fs/eventpoll.c:2026 [inline]
 do_epoll_wait+0x13d4/0x1ae0 fs/eventpoll.c:2428
 __do_sys_epoll_wait fs/eventpoll.c:2440 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2435 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f7782723457
Code: 73 01 c3 48 8b 0d d1 d9 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 76 48 8b 15 a2 d9 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc9442f898 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007ffc9442f998 RCX: 00007f7782723457
RDX: 0000000000000008 RSI: 00007ffc9442f998 RDI: 000000000000000b
RBP: 000000000000000b R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000bb8
R13: 0000000200000001 R14: 0000000000000000 R15: 0000000000000000
 </TASK>


---
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