------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.4/3991
Modules linked in:
CPU: 1 UID: 0 PID: 3991 Comm: syz-executor.4 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:ffff888045fcfa18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11008bf9f48 RCX: ffffffff81bfaf93
RDX: ffff888046a79b80 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff888016e27dc0 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff888045fcfa80
R13: 00000000ffffffff R14: ffff888016e27dc0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000e CR3: 000000000e54d000 CR4: 0000000000350ef0
Call Trace:
cleanup_mnt+0x14c/0x430
task_work_run+0x172/0x280
do_exit+0x846/0x2970
do_group_exit+0xd3/0x2a0
get_signal+0x2315/0x2340
arch_do_signal_or_restart+0x80/0x790
irqentry_exit_to_user_mode+0x106/0x1c0
exc_page_fault+0xd9/0x180
asm_exc_page_fault+0x26/0x30
RIP: 0033:0xe
Code: Unable to access opcode bytes at 0xffffffffffffffe4.
RSP: 002b:00007efd97f13190 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007efd9aab0f60 RCX: 00007efd9a99db19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200002c0
RBP: 00007efd9a9f7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd3f77fa7f R14: 00007efd97f13300 R15: 0000000000022000
irq event stamp: 825
hardirqs last enabled at (835): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (844): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (398): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (393): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop4: detected capacity change from 0 to 240
ISOFS: unable to read i-node block
isofs_fill_super: get root inode failed
kmemleak: Found object by alias at 0x607f1a63df3c
CPU: 1 UID: 0 PID: 3990 Comm: syz-executor.2 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: 0033:0x7f61cb9abb19
Code: Unable to access opcode bytes at 0x7f61cb9abaef.
RSP: 002b:00007f61c8f21218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f61cbabef68 RCX: 00007f61cb9abb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f61cbabef68
RBP: 00007f61cbabef60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f61cbabef6c
R13: 00007ffe6af89bcf R14: 00007f61c8f21300 R15: 0000000000022000
kmemleak: Object (percpu) 0x607f1a63df38 (size 8):
kmemleak: comm "syz-executor.4", pid 3974, jiffies 4294809615
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+0x105/0xaf0
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