do_writepages+0x244/0x5c0
filemap_fdatawrite_wbc+0x10b/0x150
__filemap_fdatawrite_range+0xb9/0x100
filemap_write_and_wait_range+0xa5/0x130
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.2/280
Modules linked in:
CPU: 0 UID: 0 PID: 280 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:ffff88801691fce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002d23fa1 RCX: ffffffff81bf96d3
RDX: ffff888015ce8000 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88801b6dc380 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801691fd48
R13: 00000000ffffffff R14: ffff88801b6dc380 R15: ffff88801b6dc468
FS: 000055558f562400(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a40f4a3b0 CR3: 000000003adfb000 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: 0033:0x7f9cce6bef87
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:00007fffa2e59a98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007f9cce6bef87
RDX: 00007fffa2e59b69 RSI: 000000000000000a RDI: 00007fffa2e59b60
RBP: 00007fffa2e59b60 R08: 00000000ffffffff R09: 00007fffa2e59930
R10: 000055558f563c7b R11: 0000000000000246 R12: 00007f9cce717105
R13: 00007fffa2e5ac20 R14: 000055558f563c20 R15: 00007fffa2e5ac60
irq event stamp: 168821
hardirqs last enabled at (168829): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (168838): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (168580): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (168561): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop5: detected capacity change from 0 to 512
ext4: Unknown parameter 'dont_hash'
loop5: detected capacity change from 0 to 512
ext4: Unknown parameter 'dont_hash'
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
loop1: detected capacity change from 0 to 512
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
loop2: detected capacity change from 0 to 736
kmemleak: Found object by alias at 0x607f1a63922c
CPU: 1 UID: 0 PID: 4057 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
__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
__x64_sys_exit_group+0x3e/0x50
x64_sys_call+0x18c5/0x18d0
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2bb29eab19
Code: Unable to access opcode bytes at 0x7f2bb29eaaef.
RSP: 002b:00007ffcbc49e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f2bb29eab19
RDX: 00007f2bb299d72b RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000001b2d2269b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcbc49e110
kmemleak: Object (percpu) 0x607f1a639228 (size 8):
kmemleak: comm "syz-executor.5", pid 4066, jiffies 4294829170
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: Cannot insert 0x607f1a63922c into the object search tree (overlaps existing)
CPU: 0 UID: 0 PID: 4071 Comm: syz-executor.1 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+0x8755/0xba20
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: 0033:0x7f440d0c204a
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:00007f440a635fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f440d0c204a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f440a636000
RBP: 00007f440a636040 R08: 00007f440a636040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f440a636000 R15: 0000000020012c00
kmemleak: Kernel memory leak detector disabled
kmemleak: Object (percpu) 0x607f1a639228 (size 8):
kmemleak: comm "syz-executor.5", pid 4066, jiffies 4294829170
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
EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
kmemleak: Automatic memory scanning thread ended
EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.