=====================================
WARNING: bad unlock balance detected!
6.15.0-syzkaller-12426-ge271ed52b344 #0 Not tainted
-------------------------------------
syz.3.1041/10038 is trying to release lock (&sighand->siglock) at:
[<ffffffff817aac14>] spin_unlock include/linux/spinlock.h:391 [inline]
[<ffffffff817aac14>] copy_process+0x6b74/0x76a0 kernel/fork.c:2426
but there are no more locks to release!
other info that might help us debug this:
1 lock held by syz.3.1041/10038:
#0: ffffffff8e61ecd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x4ba7/0x76a0 kernel/fork.c:2268
stack backtrace:
CPU: 0 UID: 0 PID: 10038 Comm: syz.3.1041 Not tainted 6.15.0-syzkaller-12426-ge271ed52b344 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_unlock_imbalance_bug kernel/locking/lockdep.c:5301 [inline]
print_unlock_imbalance_bug+0x11b/0x130 kernel/locking/lockdep.c:5275
__lock_release kernel/locking/lockdep.c:5540 [inline]
lock_release+0x242/0x2f0 kernel/locking/lockdep.c:5892
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_process+0x6b74/0x76a0 kernel/fork.c:2426
kernel_clone+0xfc/0x960 kernel/fork.c:2599
__do_sys_clone3+0x212/0x290 kernel/fork.c:2903
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1a2fc3189
Code: c0 08 00 48 8d 3d 7c c0 08 00 e8 02 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007fff33b76008 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fa1a2f45590 RCX: 00007fa1a2fc3189
RDX: 00007fa1a2f45590 RSI: 0000000000000058 RDI: 00007fff33b76050
RBP: 00007fa1a3d4b6c0 R08: 00007fa1a3d4b6c0 R09: 00007fff33b76137
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000004d R14: 00007fff33b76050 R15: 00007fff33b76138
</TASK>
------------[ cut here ]------------
pvqspinlock: lock 0xffff888029071280 has corrupted value 0x0!
WARNING: CPU: 1 PID: 10038 at kernel/locking/qspinlock_paravirt.h:504 __pv_queued_spin_unlock_slowpath+0x237/0x330 kernel/locking/qspinlock_paravirt.h:504
Modules linked in:
CPU: 1 UID: 0 PID: 10038 Comm: syz.3.1041 Not tainted 6.15.0-syzkaller-12426-ge271ed52b344 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__pv_queued_spin_unlock_slowpath+0x237/0x330 kernel/locking/qspinlock_paravirt.h:504
Code: 03 0f b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 67 41 8b 55 00 4c 89 ee 48 c7 c7 00 83 ad 8b e8 5a 09 f9 f5 90 <0f> 0b 90 90 e9 64 ff ff ff 90 0f 0b 48 89 df 4c 89 04 24 e8 b1 f5
RSP: 0018:ffffc900038779c8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888029071280 RCX: ffffffff817ae368
RDX: ffff888025ea8000 RSI: ffffffff817ae375 RDI: 0000000000000001
RBP: ffff888029071288 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000002d2d2d2d R12: ffff888029071290
R13: ffff888029071280 R14: 00000000003d0f00 R15: ffff888028f5a440
FS: 00005555738c3500(0000) GS:ffff8880d685a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b826e7d60 CR3: 000000010b18e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__raw_callee_save___pv_queued_spin_unlock_slowpath+0x15/0x30
.slowpath+0x9/0x18
pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:562 [inline]
queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
do_raw_spin_unlock+0x172/0x230 kernel/locking/spinlock_debug.c:142
__raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_process+0x6b74/0x76a0 kernel/fork.c:2426
kernel_clone+0xfc/0x960 kernel/fork.c:2599
__do_sys_clone3+0x212/0x290 kernel/fork.c:2903
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1a2fc3189
Code: c0 08 00 48 8d 3d 7c c0 08 00 e8 02 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007fff33b76008 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fa1a2f45590 RCX: 00007fa1a2fc3189
RDX: 00007fa1a2f45590 RSI: 0000000000000058 RDI: 00007fff33b76050
RBP: 00007fa1a3d4b6c0 R08: 00007fa1a3d4b6c0 R09: 00007fff33b76137
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000004d R14: 00007fff33b76050 R15: 00007fff33b76138
</TASK>