------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.4/287
Modules linked in:
CPU: 1 UID: 0 PID: 287 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:ffff8880158afce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002b15fa1 RCX: ffffffff81bf96d3
RDX: ffff888015833700 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88801c34cfc0 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff8880158afd48
R13: 00000000ffffffff R14: ffff88801c34cfc0 R15: ffff88801c34d0a8
FS: 00005555675c0400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555e6d1708 CR3: 00000000463b3000 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: 0033:0x7f729af22f87
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:00007ffefa874d08 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f729af22f87
RDX: 00007ffefa874dd9 RSI: 000000000000000a RDI: 00007ffefa874dd0
RBP: 00007ffefa874dd0 R08: 00000000ffffffff R09: 00007ffefa874ba0
R10: 00005555675c1c7b R11: 0000000000000206 R12: 00007f729af7b105
R13: 00007ffefa875e90 R14: 00005555675c1c20 R15: 00007ffefa875ed0
irq event stamp: 164353
hardirqs last enabled at (164361): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (164370): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (164394): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (164379): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop6: detected capacity change from 0 to 512
ext4: Unknown parameter 'É'
loop6: detected capacity change from 0 to 512
ext4: Unknown parameter 'É'
loop7: detected capacity change from 0 to 512
kmemleak: Found object by alias at 0x607f1a639204
CPU: 1 UID: 0 PID: 3991 Comm: syz-executor.3 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: 0033:0x7fae70f38b19
Code: Unable to access opcode bytes at 0x7fae70f38aef.
RSP: 002b:00007fae6e4ae218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fae7104bf68 RCX: 00007fae70f38b19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fae7104bf68
RBP: 00007fae7104bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae7104bf6c
R13: 00007ffe8237dbcf R14: 00007fae6e4ae300 R15: 0000000000022000
kmemleak: Object (percpu) 0x607f1a639200 (size 8):
kmemleak: comm "syz-executor.6", pid 3989, jiffies 4294801496
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
__alloc_workqueue+0x74b/0x1820
alloc_workqueue_noprof+0xc7/0x200
loop_configure+0xf73/0x1590
lo_ioctl+0x66d/0x1c70
blkdev_ioctl+0x27c/0x6c0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
WARNING: fs/namespace.c:1375 at cleanup_mnt+0x33f/0x430, CPU#1: syz-executor.4/287
Modules linked in:
CPU: 1 UID: 0 PID: 287 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: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:ffff8880158afe20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffff1100 RCX: ffffffff81bf9de5
RDX: ffff888015833700 RSI: ffffffff81bfa0fe RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000ffff1100 R11: 0000000000000001 R12: ffff888015833fd8
R13: ffff88801c34cfc0 R14: 0000000000000001 R15: ffff88801c34d000
FS: 00005555675c0400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cd23000 CR3: 00000000463b3000 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: 0033:0x7f729af22f87
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:00007ffefa874d08 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 00007f729af22f87
RDX: 00007ffefa874dd9 RSI: 000000000000000a RDI: 00007ffefa874dd0
RBP: 00007ffefa874dd0 R08: 00000000ffffffff R09: 00007ffefa874ba0
R10: 00005555675c1c7b R11: 0000000000000206 R12: 00007f729af7b105
R13: 00007ffefa875e90 R14: 00005555675c1c20 R15: 00007ffefa875ed0
irq event stamp: 165193
hardirqs last enabled at (165201): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (165210): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (164948): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (164921): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1756602798.524:11): avc: denied { write } for pid=3990 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
kmemleak: Cannot insert 0x607f1a639204 into the object search tree (overlaps existing)
CPU: 1 UID: 0 PID: 3995 Comm: syz-executor.7 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_counter_init_many+0x44/0x360
ext4_fill_super+0x9009/0xba20
get_tree_bdev_flags+0x38a/0x620
vfs_get_tree+0x93/0x340
path_mount+0x132d/0x1dd0
__x64_sys_mount+0x27b/0x300
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7e1258004a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007f7e0faf3fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f7e1258004a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7e0faf4000
RBP: 00007f7e0faf4040 R08: 00007f7e0faf4040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f7e0faf4000 R15: 0000000020013a00
kmemleak: Kernel memory leak detector disabled
kmemleak: Object (percpu) 0x607f1a639200 (size 8):
kmemleak: comm "syz-executor.6", pid 3989, jiffies 4294801496
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
__alloc_workqueue+0x74b/0x1820
alloc_workqueue_noprof+0xc7/0x200
loop_configure+0xf73/0x1590
lo_ioctl+0x66d/0x1c70
blkdev_ioctl+0x27c/0x6c0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
kmemleak: Automatic memory scanning thread ended
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.
audit: type=1326 audit(1756602798.943:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=3953 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa53e05db19 code=0x0
loop4: detected capacity change from 0 to 32639
EXT4-fs (loop4): VFS: Can't find ext4 filesystem