------------[ cut here ]------------
WARNING: CPU: 1 PID: 13258 at fs/namespace.c:156 mnt_ns_release+0x173/0x1e0
Modules linked in:
CPU: 1 UID: 0 PID: 13258 Comm: syz-executor.3 Not tainted 6.13.0-rc2-next-20241213 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:mnt_ns_release+0x173/0x1e0
Code: ff 48 c7 c7 f8 d0 d0 85 e8 ca cc ea 02 bf 01 00 00 00 89 c3 89 c6 e8 ac 4f b7 ff 83 fb 01 0f 85 e6 fe ff ff e8 6e 4c b7 ff 90 <0f> 0b 90 e9 d8 fe ff ff e8 60 4c b7 ff 4c 89 e7 e8 28 84 b3 ff eb
RSP: 0018:ffff88806cf09e40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81baa574
RDX: ffff88803e60d340 RSI: ffffffff81baa582 RDI: 0000000000000005
RBP: ffff88800b844000 R08: 0000000000000001 R09: fffffbfff0c7f7d2
R10: 0000000000000001 R11: 000000000003a70c R12: 0000000000000001
R13: ffff88806cf09ee0 R14: ffffffff815b1d64 R15: 0000000000000000
FS: 00007fc067f5f700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000de88000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_core+0x7c9/0x17a0
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:free_mnt_ns+0x144/0x230
Code: e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 bc 00 00 00 8b 1d fb 46 85 04 31 ff 89 de e8 de 6f b7 ff 85 db <75> 64 e8 a5 6c b7 ff ff 74 24 18 45 31 c9 31 c9 41 b8 01 00 00 00
RSP: 0018:ffff88802d99fb08 EFLAGS: 00000202
RAX: ffffc90009264000 RBX: 0000000000000001 RCX: ffffffff81ba8542
RDX: 0000000000200000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000083 R08: 0000000000200008 R09: 000000000000ffff
R10: 0000000000000001 R11: 000000000003fffc R12: ffff88800b844fa0
R13: ffff88803e60c0a8 R14: 0000000040aa1100 R15: ffff88802d99fe38
put_mnt_ns+0xfc/0x130
free_nsproxy+0x47/0x460
switch_task_namespaces+0xe2/0x100
copy_process+0x2741/0x70e0
kernel_clone+0xeb/0x850
__do_sys_clone+0xba/0x100
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc06a9e9b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc067f5f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fc06aafcf60 RCX: 00007fc06a9e9b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040aa1180
RBP: 00007fc06aa43f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffd07cdeaf R14: 00007fc067f5f300 R15: 0000000000022000
irq event stamp: 8454
hardirqs last enabled at (8466): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (8477): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (7420): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (7477): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: e0 07 loopne 0x9
2: 48 c1 e9 03 shr $0x3,%rcx
6: 83 c0 03 add $0x3,%eax
9: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx
d: 38 d0 cmp %dl,%al
f: 7c 08 jl 0x19
11: 84 d2 test %dl,%dl
13: 0f 85 bc 00 00 00 jne 0xd5
19: 8b 1d fb 46 85 04 mov 0x48546fb(%rip),%ebx # 0x485471a
1f: 31 ff xor %edi,%edi
21: 89 de mov %ebx,%esi
23: e8 de 6f b7 ff callq 0xffb77006
28: 85 db test %ebx,%ebx
* 2a: 75 64 jne 0x90 <-- trapping instruction
2c: e8 a5 6c b7 ff callq 0xffb76cd6
31: ff 74 24 18 pushq 0x18(%rsp)
35: 45 31 c9 xor %r9d,%r9d
38: 31 c9 xor %ecx,%ecx
3a: 41 b8 01 00 00 00 mov $0x1,%r8d