------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.0/288
Modules linked in:
CPU: 0 UID: 0 PID: 288 Comm: syz-executor.0 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:ffff88801687fce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002d0ffa1 RCX: ffffffff81bf96d3
RDX: ffff888015830000 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88801dfcaa80 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801687fd48
R13: 00000000ffffffff R14: ffff88801dfcaa80 R15: ffff88801dfcab68
FS: 0000555580575400(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7ff90a3a4 CR3: 00000000455d5000 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: 0033:0x7f5657f99f87
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:00007ffd934b2f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f5657f99f87
RDX: 00007ffd934b3029 RSI: 000000000000000a RDI: 00007ffd934b3020
RBP: 00007ffd934b3020 R08: 00000000ffffffff R09: 00007ffd934b2df0
R10: 0000555580576c7b R11: 0000000000000246 R12: 00007f5657ff2105
R13: 00007ffd934b40e0 R14: 0000555580576c20 R15: 00007ffd934b4120
irq event stamp: 158547
hardirqs last enabled at (158555): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (158564): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (158204): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (158199): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop6: detected capacity change from 0 to 264192
I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop1): unable to read boot sector
audit: type=1400 audit(1756497720.474:10): avc: denied { write } for pid=4061 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
loop6: detected capacity change from 0 to 264192
I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop1): unable to read boot sector
------------[ cut here ]------------
WARNING: fs/namespace.c:1375 at cleanup_mnt+0x33f/0x430, CPU#1: syz-executor.0/288
Modules linked in:
CPU: 1 UID: 0 PID: 288 Comm: syz-executor.0 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:cleanup_mnt+0x33f/0x430
Code: c7 a0 45 d1 85 e8 01 7c fa 02 49 8d 7d 40 5b 48 c7 c6 10 e2 be 81 5d 41 5c 41 5d 41 5e 41 5f e9 57 b3 9c ff e8 82 46 b4 ff 90 <0f> 0b 90 e9 e6 fc ff ff e8 74 46 b4 ff 4c 89 ef e8 6c d7 06 00 e9
RSP: 0018:ffff88801687fe20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000014 RCX: ffffffff81bf9de5
RDX: ffff888015830000 RSI: ffffffff81bfa0fe RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000014 R11: 0000000000000001 R12: ffff8880158308d8
R13: ffff88801dfcaa80 R14: 0000000000000001 R15: ffff88801dfcaac0
FS: 0000555580575400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556932e708 CR3: 00000000455d5000 CR4: 0000000000350ef0
Call Trace:
task_work_run+0x172/0x280
exit_to_user_mode_loop+0xef/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5657f99f87
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:00007ffd934b2f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 00007f5657f99f87
RDX: 00007ffd934b3029 RSI: 000000000000000a RDI: 00007ffd934b3020
RBP: 00007ffd934b3020 R08: 00000000ffffffff R09: 00007ffd934b2df0
R10: 0000555580576c7b R11: 0000000000000246 R12: 00007f5657ff2105
R13: 00007ffd934b40e0 R14: 0000555580576c20 R15: 00007ffd934b4120
irq event stamp: 159437
hardirqs last enabled at (159447): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (159456): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (159358): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (159353): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
kmemleak: Found object by alias at 0x607f1a6396ec
CPU: 1 UID: 0 PID: 4067 Comm: syz-executor.6 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
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: 0033:0x7fb7fe8bf04a
Code: Unable to access opcode bytes at 0x7fb7fe8bf020.
RSP: 002b:00007fb7fbe32fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffea RBX: 0000000020000200 RCX: 00007fb7fe8bf04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fb7fbe33000
RBP: 00007fb7fbe33040 R08: 00007fb7fbe33040 R09: 0000000020000000
R10: 0000000000008002 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fb7fbe33000 R15: 0000000020010d00
kmemleak: Object (percpu) 0x607f1a6396e8 (size 16):
kmemleak: comm "syz-executor.7", pid 289, jiffies 4294819251
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
__percpu_counter_init_many+0x44/0x360
mm_init+0xcac/0x1170
copy_process+0x3ab7/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone+0xce/0x120
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
kmemleak: Cannot insert 0x607f1a6396f0 into the object search tree (overlaps existing)
CPU: 0 UID: 0 PID: 4060 Comm: syz-executor.2 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
Call Trace:
dump_stack_lvl+0xca/0x120
__link_object+0x190/0x210
__create_object+0x48/0x80
pcpu_alloc_noprof+0x87a/0x1170
percpu_ref_init+0x37/0x400
io_uring_setup+0x44c/0x2000
__x64_sys_io_uring_setup+0xc8/0x170
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce0f0d6b19
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:00007fce0c62b108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007fce0f1ea020 RCX: 00007fce0f0d6b19
RDX: 0000000020ffa000 RSI: 0000000020003a00 RDI: 0000000000002262
RBP: 0000000020003a00 R08: 0000000020003ac0 R09: 0000000020003ac0
R10: 0000000020000080 R11: 0000000000000202 R12: 0000000020003ac0
R13: 0000000020ffa000 R14: 0000000020000080 R15: 0000000020ff5000
kmemleak: Kernel memory leak detector disabled
kmemleak: Object (percpu) 0x607f1a6396e8 (size 16):
kmemleak: comm "syz-executor.7", pid 289, jiffies 4294819251
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
__percpu_counter_init_many+0x44/0x360
mm_init+0xcac/0x1170
copy_process+0x3ab7/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone+0xce/0x120
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
kmemleak: Automatic memory scanning thread ended