I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 0, async page read
------------[ cut here ]------------
kernfs_put: syz6/pids.events: released with incorrect active_ref 0
WARNING: CPU: 0 PID: 5518 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 0 PID: 5518 Comm: kworker/0:2 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:ffff8880446f7bd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888018623580 RSI: ffffffff812bd348 RDI: ffffed10088def6d
RBP: ffff888008e40dd0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008e40d98
R13: ffff88801b9539f8 R14: 0000000000000000 R15: ffff88800f15cfa0
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36de0a7542 CR3: 000000000dc8a000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa0f/0x1690
worker_thread+0x637/0x1250
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kthread+0x2ed/0x3a0
Buffer I/O error on dev sr0, logical block 1, async page read
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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
irq event stamp: 99511
hardirqs last enabled at (99517): [] vprintk_emit+0x4fe/0x550
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
hardirqs last disabled at (99526): [] console_emit_next_record.constprop.0+0x667/0x800
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last enabled at (99048): [] __irq_exit_rcu+0x113/0x170
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last disabled at (98921): [] __irq_exit_rcu+0x113/0x170
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
---[ 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 ffff888008e40e18 by task kworker/0:2/5518
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
CPU: 0 PID: 5518 Comm: kworker/0:2 Tainted: G W 5.19.0-rc5-next-20220706 #1
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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
Call Trace:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
dump_stack_lvl+0x8b/0xb3
print_report.cold+0x5e/0x5e1
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
kasan_report+0xb1/0x1b0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
llist_del_first+0x89/0xa0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Allocated by task 300:
kasan_save_stack+0x1e/0x40
__kasan_slab_alloc+0x66/0x80
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kmem_cache_alloc+0x1b1/0x490
__kernfs_new_node+0xd4/0x8b0
kernfs_new_node+0x93/0x120
__kernfs_create_file+0x51/0x350
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
cgroup_addrm_files+0x3e2/0x9d0
css_populate_dir+0x19b/0x450
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
cgroup_apply_control_enable+0x3ae/0xa40
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
cgroup_mkdir+0x824/0x11f0
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
do_syscall_64+0x3b/0x90
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
entry_SYSCALL_64_after_hwframe+0x46/0xb0
Freed by task 5518:
kasan_save_stack+0x1e/0x40
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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
kernfs_put.part.0+0x2c7/0x540
kernfs_put+0x42/0x50
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_notify_workfn+0x417/0x560
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
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
The buggy address belongs to the object at ffff888008e40d98
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 128 bytes inside of
168-byte region [ffff888008e40d98, ffff888008e40e40)
The buggy address belongs to the physical page:
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
page:000000002fe26534 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8e40
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:
ffff888008e40d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
ffff888008e40d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888008e40e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
^
ffff888008e40e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888008e40f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
==================================================================
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
------------[ cut here ]------------
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
WARNING: CPU: 0 PID: 13 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Modules linked in:
CPU: 0 PID: 13 Comm: ksoftirqd/0 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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RIP: 0010:kernfs_get.part.0+0x69/0x80
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RSP: 0018:ffff88800825fb68 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff888008e40d98 RCX: 0000000000000100
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RDX: ffff888008250000 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: ffff888008e40d98 R15: ffff88800dd9d530
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36de0a7542 CR3: 000000000dc8a000 CR4: 0000000000350ef0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Call Trace:
kernfs_get+0x1b/0x30
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
kernfs_notify+0x180/0x350
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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
__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
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
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: 10748884
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
hardirqs last enabled at (10748883): [] run_ksoftirqd+0x32/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
hardirqs last disabled at (10748884): [] __schedule+0x11d9/0x24a0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last enabled at (10748882): [] run_ksoftirqd+0x2d/0x60
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
softirqs last disabled at (10748501): [] 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
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
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
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
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=8021 comm=syz-executor.7
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=8020 comm=syz-executor.4
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=8128 comm=syz-executor.4
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: 112 Comm: systemd-journal 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:ffff88800e61fc70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88800ecafee8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81771eb1
RBP: 0000000000000000 R08: ffff88800ecafee8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88800e61fcb0 R14: 0000000000000000 R15: ffff888008e40d98
FS: 00007f38c20e0900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 000000000ea46000 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
kmem_cache_alloc+0x1b1/0x490
getname_flags.part.0+0x50/0x4f0
getname+0x8e/0xd0
do_sys_openat2+0xf5/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f38c2999c64
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 36 61 f9 ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 68 61 f9 ff 8b 44
RSP: 002b:00007ffdfda97380 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000056082f6362f0 RCX: 00007f38c2999c64
RDX: 0000000000080000 RSI: 00007ffdfda976e0 RDI: 00000000ffffff9c
RBP: 00007ffdfda976e0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000080000
R13: 000056082f6362f0 R14: 0000000000000001 R15: 0000000000000014
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:ffff88800e61fc70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88800ecafee8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81771eb1
RBP: 0000000000000000 R08: ffff88800ecafee8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88800e61fcb0 R14: 0000000000000000 R15: ffff888008e40d98
FS: 00007f38c20e0900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 000000000ea46000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
ata2.00: qc timeout (cmd 0xa0)
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
ata2.00: BMDMA stat 0x5
ata2.00: cmd a0/01:00:00:00:fc/00:00:00:00:00/a0 tag 0 dma 131072 in
Read(10) 28 00 00 00 00 00 00 00 40 00res 41/20:03:00:00:fc/00:00:00:00:00/a0 Emask 0x5 (timeout)
ata2.00: status: { DRDY ERR }
ata2: soft resetting link
ata2: found unknown device (class 0)
----------------
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