------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.5/16649
Modules linked in:
CPU: 0 UID: 0 PID: 16649 Comm: syz-executor.5 Tainted: G W 6.17.0-rc4-next-20250901 #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 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff88801c18f878 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 1ffff11003831f14 RCX: ffffc900044ac000
RDX: 0000000000040000 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff888016b096c0 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801c18f8e0
R13: 00000000ffffffff R14: dead000000000100 R15: ffff888016b096c0
FS: 00007f8a0dc8f700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1344219620 CR3: 000000001c3b7000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x57d/0x810
put_mnt_ns+0xf5/0x120
free_nsproxy+0x3a/0x400
switch_task_namespaces+0xe2/0x100
copy_process+0x26c8/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a10719b19
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:00007f8a0dc8f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f8a1082cf60 RCX: 00007f8a10719b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000ec0
RBP: 00007f8a10773f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc64997b2f R14: 00007f8a0dc8f300 R15: 0000000000022000
irq event stamp: 3699
hardirqs last enabled at (3707): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (3716): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (3462): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (3035): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
kmemleak: Found object by alias at 0x607f1a63e40c
CPU: 1 UID: 0 PID: 16666 Comm: syz-executor.6 Tainted: G W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
__lookup_object+0x94/0xb0
delete_object_full+0x27/0x70
free_percpu+0x30/0x1160
futex_hash_free+0x38/0xc0
mmput+0x2d3/0x390
do_exit+0x79d/0x2970
do_group_exit+0xd3/0x2a0
get_signal+0x2315/0x2340
arch_do_signal_or_restart+0x80/0x790
exit_to_user_mode_loop+0x8b/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f185c673b19
Code: Unable to access opcode bytes at 0x7f185c673aef.
RSP: 002b:00007f1859bc8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f185c787028 RCX: 00007f185c673b19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f185c787028
RBP: 00007f185c787020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f185c78702c
R13: 00007fff4dde0bef R14: 00007f1859bc8300 R15: 0000000000022000
kmemleak: Object (percpu) 0x607f1a63e408 (size 8):
kmemleak: comm "syz-executor.5", pid 16649, jiffies 4296992116
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
alloc_vfsmnt+0x135/0x6e0
clone_mnt+0x6c/0xb70
copy_tree+0x34b/0xaf0
copy_mnt_ns+0x1ab/0xab0
create_new_namespaces+0xd6/0xab0
copy_namespaces+0x45c/0x580
copy_process+0x2649/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.5/16702
Modules linked in:
CPU: 1 UID: 0 PID: 16702 Comm: syz-executor.5 Tainted: G W 6.17.0-rc4-next-20250901 #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 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff88803ecd7878 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 1ffff11007d9af14 RCX: ffffc900044ac000
RDX: 0000000000040000 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff888016293500 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88803ecd78e0
R13: 00000000ffffffff R14: dead000000000100 R15: ffff888016293500
FS: 00007f8a0dc8f700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557d7e708 CR3: 000000001d035000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x57d/0x810
put_mnt_ns+0xf5/0x120
free_nsproxy+0x3a/0x400
switch_task_namespaces+0xe2/0x100
copy_process+0x26c8/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a10719b19
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:00007f8a0dc8f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f8a1082cf60 RCX: 00007f8a10719b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000ec0
RBP: 00007f8a10773f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc64997b2f R14: 00007f8a0dc8f300 R15: 0000000000022000
irq event stamp: 2933
hardirqs last enabled at (2941): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2950): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2418): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (2413): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
kmemleak: Found object by alias at 0x607f1a63e40c
CPU: 1 UID: 0 PID: 16696 Comm: iou-sqp-16695 Tainted: G W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
__lookup_object+0x94/0xb0
delete_object_full+0x27/0x70
free_percpu+0x30/0x1160
futex_hash_free+0x38/0xc0
mmput+0x2d3/0x390
do_exit+0x79d/0x2970
io_sq_thread+0xfc9/0x1b00
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
kmemleak: Object (percpu) 0x607f1a63e408 (size 8):
kmemleak: comm "syz-executor.5", pid 16702, jiffies 4296992613
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
alloc_vfsmnt+0x135/0x6e0
clone_mnt+0x6c/0xb70
copy_tree+0x34b/0xaf0
copy_mnt_ns+0x1ab/0xab0
create_new_namespaces+0xd6/0xab0
copy_namespaces+0x45c/0x580
copy_process+0x2649/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f