linux-kernel - [syzbot] [kernel?] WARNING: locking bug in _

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Date: Sat, 08 Jun 2024 09:12:31 -0700
From: syzbot <syzbot+46b40e354b532433eeef@...kaller.appspotmail.com>
To: anna-maria@...utronix.de, frederic@...nel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	tglx@...utronix.de
Subject: [syzbot] [kernel?] WARNING: locking bug in __schedule

Hello,

syzbot found the following issue on:

HEAD commit:    dc772f8237f9 Merge tag 'mm-hotfixes-stable-2024-06-07-15-2..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1422da8c980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=333ebe38d43c42e2
dashboard link: https://syzkaller.appspot.com/bug?extid=46b40e354b532433eeef
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3700030c3c13/disk-dc772f82.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e238e5fcc97d/vmlinux-dc772f82.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ee78908acdd/bzImage-dc772f82.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+46b40e354b532433eeef@...kaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 11576 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline]
WARNING: CPU: 1 PID: 11576 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4773 [inline]
WARNING: CPU: 1 PID: 11576 at kernel/locking/lockdep.c:232 __lock_acquire+0x573/0x1fd0 kernel/locking/lockdep.c:5087
Modules linked in:
CPU: 1 PID: 11576 Comm: syz-executor.1 Not tainted 6.10.0-rc2-syzkaller-00315-gdc772f8237f9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4773 [inline]
RIP: 0010:__lock_acquire+0x573/0x1fd0 kernel/locking/lockdep.c:5087
Code: 00 00 83 3d 6e 0c 3b 0e 00 75 23 90 48 c7 c7 20 ba ca 8b 48 c7 c6 c0 bc ca 8b e8 78 e4 e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc90015a375b0 EFLAGS: 00010046
RAX: 7003b597e2d67b00 RBX: 0000000000000e50 RCX: ffff888020a60000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff815857a2 R09: fffffbfff1c39994
R10: dffffc0000000000 R11: fffffbfff1c39994 R12: 0000000000000001
R13: ffff888020a60000 R14: 0000000000000000 R15: ffff888020a60b00
FS:  0000555579285480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3022f000 CR3: 000000001cbf6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:567
 raw_spin_rq_lock kernel/sched/sched.h:1406 [inline]
 rq_lock kernel/sched/sched.h:1702 [inline]
 __schedule+0x357/0x4a20 kernel/sched/core.c:6653
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
 hrtimer_start_expires include/linux/hrtimer.h:289 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1949 [inline]
 do_nanosleep+0x158/0x600 kernel/time/hrtimer.c:2025
 hrtimer_nanosleep+0x227/0x470 kernel/time/hrtimer.c:2081
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep+0x32d/0x3c0 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc521ca8375
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffdb0499ff0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000052 RCX: 00007fc521ca8375
RDX: 00007ffdb049a030 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffdb049a0ac R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000095a92 R14: 0000000000095a43 R15: 0000000000000001
 </TASK>


---
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