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#0: syz-executor.2/4007
Modules linked in:
CPU: 0 UID: 0 PID: 4007 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
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:ffff8880140c7878 EFLAGS: 00010216
RAX: 000000000003329b RBX: 1ffff11002818f14 RCX: ffffc90005206000
RDX: 0000000000040000 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88801606a380 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff8880140c78e0
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88801606a380
FS: 00007febddffe700(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f586397aff8 CR3: 000000000de99000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x7f1/0x810
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: 0033:0x7febe0a88b19
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:00007febddffe188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007febe0b9bf60 RCX: 00007febe0a88b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240
RBP: 00007febe0ae2f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf7a8fdcf R14: 00007febddffe300 R15: 0000000000022000
irq event stamp: 8507
hardirqs last enabled at (8517): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (8526): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (8544): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (8555): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1756542985.773:12): avc: denied { watch_reads } for pid=4004 comm="syz-executor.5" path="/syzkaller-testdir906840177/syzkaller.VHBmd2/4" dev="sda" ino=15975 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1
loop4: detected capacity change from 0 to 736
kmemleak: Cannot insert 0x607f1a639d48 into the object search tree (overlaps existing)
CPU: 1 UID: 0 PID: 4019 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
Call Trace:
dump_stack_lvl+0xca/0x120
__link_object+0x190/0x210
__create_object+0x48/0x80
pcpu_alloc_noprof+0x87a/0x1170
__percpu_init_rwsem+0x2d/0x160
alloc_super+0x29e/0xb80
sget_fc+0xfe/0xb80
get_tree_bdev_flags+0x1b8/0x620
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: 0033:0x7f27da95d04a
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:00007f27d7ed0fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f27da95d04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f27d7ed1000
RBP: 00007f27d7ed1040 R08: 00007f27d7ed1040 R09: 0000000020000000
R10: 0000000000000001 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f27d7ed1000 R15: 0000000020000040
kmemleak: Kernel memory leak detector disabled
kmemleak: Object (percpu) 0x607f1a639d44 (size 8):
kmemleak: comm "syz-executor.2", pid 4007, jiffies 4294822059
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
loop1: detected capacity change from 0 to 5168
kmemleak: Automatic memory scanning thread ended
loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): unsupported descriptor size 0
loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): unsupported descriptor size 0
loop7: detected capacity change from 0 to 32767