------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.4/284
Modules linked in:
CPU: 0 UID: 0 PID: 284 Comm: syz-executor.4 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:mntput_no_expire+0x78e/0xbe0
Code: 05 16 42 81 04 01 e8 31 f8 91 ff e9 41 fc ff ff e8 b7 50 b4 ff 31 ff 44 89 ee e8 dd 4b b4 ff 45 85 ed 79 09 e8 a3 50 b4 ff 90 <0f> 0b 90 e8 9a 50 b4 ff e8 75 f6 fb 02 31 ff 89 c5 89 c6 e8 ba 4b
RSP: 0018:ffff8880188bfce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11003117fa1 RCX: ffffffff81bf96d3
RDX: ffff888016d3b700 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff888015ed3180 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff8880188bfd48
R13: 00000000ffffffff R14: ffff888015ed3180 R15: ffff888015ed3268
FS: 000055557e24e400(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f597766c3a4 CR3: 0000000033054000 CR4: 0000000000350ef0
Call Trace:
path_umount+0x6e0/0x1100
__x64_sys_umount+0x15c/0x190
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28523a1f87
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007fff73f1c0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000389 RCX: 00007f28523a1f87
RDX: 00007fff73f1c1ab RSI: 000000000000000a RDI: 00007fff73f1c1a0
RBP: 00007fff73f1c1a0 R08: 00000000ffffffff R09: 00007fff73f1bf70
R10: 000055557e24fc7b R11: 0000000000000246 R12: 00007f28523fa105
R13: 00007fff73f1d260 R14: 000055557e24fc20 R15: 00007fff73f1d2a0
irq event stamp: 2223585
hardirqs last enabled at (2223941): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2224002): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2223998): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (2223947): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop5: detected capacity change from 0 to 264192
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop5: detected capacity change from 0 to 264192
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop5: detected capacity change from 0 to 264192
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22