sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
------------[ cut here ]------------
kernfs_put: syz3/pids.events: released with incorrect active_ref 0
WARNING: CPU: 1 PID: 16864 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 1 PID: 16864 Comm: kworker/1:2 Not tainted 5.19.0-rc5-next-20220706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Workqueue: events kernfs_notify_workfn
RIP: 0010:kernfs_put.part.0+0x433/0x540
Code: 03 80 3c 18 00 0f 85 ea 00 00 00 4d 8b 7d 38 e8 53 fc a6 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 e0 5b 72 84 e8 13 aa 6c 02 <0f> 0b e9 b9 fc ff ff 48 89 ef e8 0e b3 d9 ff e9 c1 fd ff ff e8 04
RSP: 0018:ffff888048b07bd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RDX: ffff88804a0cb580 RSI: ffffffff812bd348 RDI: ffffed1009160f6d
RBP: ffff8880450d9860 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880450d9828
R13: ffff88801dc0c488 R14: 0000000000000000 R15: ffff88804461ccf8
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d821000 CR3: 0000000045582000 CR4: 0000000000350ee0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Call Trace:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_put+0x42/0x50
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_notify_workfn+0x417/0x560
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
process_one_work+0xa0f/0x1690
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
worker_thread+0x637/0x1250
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kthread+0x2ed/0x3a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
ret_from_fork+0x22/0x30
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
irq event stamp: 18267
hardirqs last enabled at (18277): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (18288): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (17762): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (17713): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
==================================================================
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
BUG: KASAN: use-after-free in llist_del_first+0x89/0xa0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Read of size 8 at addr ffff8880450d98a8 by task kworker/1:2/16864
CPU: 1 PID: 16864 Comm: kworker/1:2 Tainted: G W 5.19.0-rc5-next-20220706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Workqueue: events kernfs_notify_workfn
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Call Trace:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
dump_stack_lvl+0x8b/0xb3
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
print_report.cold+0x5e/0x5e1
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kasan_report+0xb1/0x1b0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
llist_del_first+0x89/0xa0
kernfs_notify_workfn+0x78/0x560
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
process_one_work+0xa0f/0x1690
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
worker_thread+0x637/0x1250
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kthread+0x2ed/0x3a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
ret_from_fork+0x22/0x30
Allocated by task 550:
kasan_save_stack+0x1e/0x40
__kasan_slab_alloc+0x66/0x80
kmem_cache_alloc+0x1b1/0x490
__kernfs_new_node+0xd4/0x8b0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_new_node+0x93/0x120
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
__kernfs_create_file+0x51/0x350
cgroup_addrm_files+0x3e2/0x9d0
css_populate_dir+0x19b/0x450
cgroup_apply_control_enable+0x3ae/0xa40
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
cgroup_mkdir+0x824/0x11f0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_iop_mkdir+0x149/0x1d0
vfs_mkdir+0x417/0x6a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
do_mkdirat+0x17b/0x2e0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
__x64_sys_mkdir+0xf2/0x140
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Freed by task 16864:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
__kasan_slab_free+0x108/0x190
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kmem_cache_free+0xfb/0x600
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_put.part.0+0x2c7/0x540
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
process_one_work+0xa0f/0x1690
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
worker_thread+0x637/0x1250
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
The buggy address belongs to the object at ffff8880450d9828
which belongs to the cache kernfs_node_cache of size 168
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
The buggy address is located 128 bytes inside of
168-byte region [ffff8880450d9828, ffff8880450d98d0)
The buggy address belongs to the physical page:
page:00000000cc283d21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x450d9
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080358c0
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
page dumped because: kasan: bad access detected
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Memory state around the buggy address:
ffff8880450d9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
ffff8880450d9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
>ffff8880450d9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
^
ffff8880450d9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
ffff8880450d9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 19 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
CPU: 1 PID: 19 Comm: ksoftirqd/1 Tainted: G B W 5.19.0-rc5-next-20220706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:kernfs_get.part.0+0x69/0x80
Code: 31 ff 89 ee e8 a8 fd a6 ff 85 ed 74 18 e8 cf 00 a7 ff be 04 00 00 00 48 89 df e8 d2 ba d9 ff f0 ff 03 5b 5d c3 e8 b7 00 a7 ff <0f> 0b eb df 48 89 df e8 7b b7 d9 ff eb c6 66 0f 1f 84 00 00 00 00
RSP: 0018:ffff8880082b7b68 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880450d9828 RCX: 0000000000000100
RDX: ffff88800828d040 RSI: ffffffff819df849 RDI: 0000000000000005
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff8880450d9828 R15: ffff88803947d930
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
CR2: 0000001b2d821000 CR3: 0000000045582000 CR4: 0000000000350ee0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_get+0x1b/0x30
kernfs_notify+0x180/0x350
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
cgroup_file_notify+0xf5/0x1a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
call_timer_fn+0x17d/0x5f0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
__run_timers.part.0+0x65e/0xa50
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
run_timer_softirq+0xae/0x1a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
__do_softirq+0x1c8/0x8cc
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
run_ksoftirqd+0x2d/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
smpboot_thread_fn+0x66f/0xa00
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kthread+0x2ed/0x3a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
ret_from_fork+0x22/0x30
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
irq event stamp: 14503826
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
hardirqs last enabled at (14503825): [] run_ksoftirqd+0x32/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
hardirqs last disabled at (14503826): [] __schedule+0x11d9/0x24a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last enabled at (14503824): [] run_ksoftirqd+0x2d/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last disabled at (14503799): [] run_ksoftirqd+0x2d/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
---[ end trace 0000000000000000 ]---
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
loop6: detected capacity change from 0 to 256
loop1: detected capacity change from 0 to 256
FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
BUG: kernel NULL pointer dereference, address: 0000000000000018
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 17160 Comm: systemd-udevd Tainted: G B W 5.19.0-rc5-next-20220706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:qlist_free_all+0xd3/0x190
Code: 03 05 a1 76 7b 03 48 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48 8b 02 f6 c4 02 b8 00 00 00 00 48 0f 44 d0 <4c> 8b 72 18 e9 50 ff ff ff 49 83 7e 48 00 0f 85 68 ff ff ff 41 f7
RSP: 0018:ffff888047dc7ad0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880181d9bfb RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81771eb1
RBP: 0000000000000000 R08: ffff8880181d9bfb R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888047dc7b10 R14: 0000000000000000 R15: ffff8880450d9828
FS: 00007fc53ab7a8c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 0000000047a22000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
kasan_quarantine_reduce+0x180/0x200
__kasan_slab_alloc+0x78/0x80
__kmalloc_node+0x1c4/0x480
kvmalloc_node+0x41/0x1e0
vmemdup_user+0x22/0x100
setxattr_copy+0x140/0x1f0
setxattr+0xcb/0x160
path_setxattr+0x197/0x1c0
__x64_sys_setxattr+0xc0/0x160
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fc53b036c9a
Code: 48 8b 0d f9 21 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 bc 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c6 21 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fff1dd0ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fc53b036c9a
RDX: 000055f2b75847b0 RSI: 00007fc53b142753 RDI: 00007fff1dd0aeb0
RBP: 000055f2b75847b0 R08: 0000000000000000 R09: 00007fff1dd0ad30
R10: 000000000000001e R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1dd0aeb0 R14: 00007fff1dd0aeb0 R15: 0000000000000010
Modules linked in:
CR2: 0000000000000018
---[ end trace 0000000000000000 ]---
RIP: 0010:qlist_free_all+0xd3/0x190
Code: 03 05 a1 76 7b 03 48 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48 8b 02 f6 c4 02 b8 00 00 00 00 48 0f 44 d0 <4c> 8b 72 18 e9 50 ff ff ff 49 83 7e 48 00 0f 85 68 ff ff ff 41 f7
RSP: 0018:ffff888047dc7ad0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880181d9bfb RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81771eb1
RBP: 0000000000000000 R08: ffff8880181d9bfb R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888047dc7b10 R14: 0000000000000000 R15: ffff8880450d9828
FS: 00007fc53ab7a8c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 0000000047a22000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 03 05 a1 76 7b 03 add 0x37b76a1(%rip),%eax # 0x37b76a7
6: 48 8b 48 08 mov 0x8(%rax),%rcx
a: 48 89 c2 mov %rax,%rdx
d: f6 c1 01 test $0x1,%cl
10: 0f 85 b6 00 00 00 jne 0xcc
16: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1b: 48 8b 02 mov (%rdx),%rax
1e: f6 c4 02 test $0x2,%ah
21: b8 00 00 00 00 mov $0x0,%eax
26: 48 0f 44 d0 cmove %rax,%rdx
* 2a: 4c 8b 72 18 mov 0x18(%rdx),%r14 <-- trapping instruction
2e: e9 50 ff ff ff jmpq 0xffffff83
33: 49 83 7e 48 00 cmpq $0x0,0x48(%r14)
38: 0f 85 68 ff ff ff jne 0xffffffa6
3e: 41 rex.B
3f: f7 .byte 0xf7