netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.3'.
------------[ cut here ]------------
kernfs_put: syz2/memory.events: released with incorrect active_ref 0
------------[ cut here ]------------
WARNING: CPU: 1 PID: 35 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
WARNING: CPU: 0 PID: 4878 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
Modules linked in:
CPU: 0 PID: 4878 Comm: syz-executor.0 Not tainted 5.19.0-rc4-next-20220630 #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
CPU: 1 PID: 35 Comm: kworker/1:1 Not tainted 5.19.0-rc4-next-20220630 #1
Code: 31 ff 89 ee e8 c8 0b a7 ff 85 ed 74 18 e8 ef 0e a7 ff be 04 00 00 00 48 89 df e8 c2 c3 d9 ff f0 ff 03 5b 5d c3 e8 d7 0e a7 ff <0f> 0b eb df 48 89 df e8 6b c0 d9 ff eb c6 66 0f 1f 84 00 00 00 00
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RSP: 0018:ffff88806ce09c80 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88800ee04bc8 RCX: 0000000000000100
RDX: ffff888017dc0000 RSI: ffffffff819d50a9 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff88800ee04bc8 R15: ffff88801716c490
FS: 00007f2615843700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
Workqueue: events kernfs_notify_workfn
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e029000 CR3: 000000001b0aa000 CR4: 0000000000350ef0
Call Trace:
kernfs_get+0x1b/0x30
kernfs_notify+0x180/0x350
cgroup_file_notify+0xf5/0x1a0
call_timer_fn+0x17d/0x5f0
__run_timers.part.0+0x65e/0xa50
run_timer_softirq+0xae/0x1a0
__do_softirq+0x270/0x8c7
__irq_exit_rcu+0x113/0x170
irq_exit_rcu+0x5/0x20
sysvec_apic_timer_interrupt+0x8e/0xc0
asm_sysvec_apic_timer_interrupt+0x1b/0x20
RIP: 0010:lock_is_held_type+0xf8/0x130
Code: 20 ca 66 84 e8 79 0c 00 00 b8 ff ff ff ff 65 0f c1 05 14 71 e9 7b 83 f8 01 75 22 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb c0 0f 0b 48
RSP: 0018:ffff888043167588 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff852886d0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000001 R12: ffff888017dc0000
R13: 0000000000000001 R14: 00000000ffffffff R15: ffff888017dc09a0
shrinker_info_protected+0x20/0x110
do_shrink_slab+0x8df/0xb00
shrink_slab+0x3d7/0x6e0
shrink_node+0x892/0x1d10
do_try_to_free_pages+0x3c7/0x1670
try_to_free_mem_cgroup_pages+0x304/0x880
try_charge_memcg+0x4c2/0x13c0
mem_cgroup_charge_skmem+0x7c/0x1b0
RIP: 0010:kernfs_put.part.0+0x433/0x540
sock_setsockopt+0x203e/0x3490
Code: 03 80 3c 18 00 0f 85 ea 00 00 00 4d 8b 7d 38 e8 73 0a a7 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 20 58 72 84 e8 7e 40 6c 02 <0f> 0b e9 b9 fc ff ff 48 89 ef e8 fe bb d9 ff e9 c1 fd ff ff e8 f4
RSP: 0018:ffff888009b57bd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8880097b5040 RSI: ffffffff812b68e8 RDI: ffffed100136af6d
RBP: ffff88800ee04c00 R08: 0000000000000005 R09: 0000000000000000
__sys_setsockopt+0x258/0x2a0
R10: 0000000080000000 R11: 0000000000000001 R12: ffff88800ee04bc8
R13: ffff888015d263a0 R14: 0000000000000000 R15: ffff888008cd1528
__x64_sys_setsockopt+0xba/0x150
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
do_syscall_64+0x3b/0x90
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
entry_SYSCALL_64_after_hwframe+0x46/0xb0
CR2: 0000001b2da26000 CR3: 0000000017c14000 CR4: 0000000000350ee0
RIP: 0033:0x7f26182cdb19
Call Trace:
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:00007f2615843188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f26183e0f60 RCX: 00007f26182cdb19
RDX: 0000000000000049 RSI: 0000000000000001 RDI: 0000000000000008
RBP: 00007f2618327f6d R08: 0000000000000010 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
kernfs_put+0x42/0x50
R13: 00007ffff2ef400f R14: 00007f2615843300 R15: 0000000000022000
kernfs_notify_workfn+0x417/0x560
irq event stamp: 8029
hardirqs last enabled at (8028): [] asm_sysvec_apic_timer_interrupt+0x1b/0x20
hardirqs last disabled at (8029): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (7858): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (8017): [] __irq_exit_rcu+0x113/0x170
process_one_work+0xa17/0x1690
---[ end trace 0000000000000000 ]---
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
irq event stamp: 368113
hardirqs last enabled at (368123): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (368134): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (367298): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (367277): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in llist_del_first+0x89/0xa0
Read of size 8 at addr ffff88800ee04c48 by task kworker/1:1/35
CPU: 1 PID: 35 Comm: kworker/1:1 Tainted: G W 5.19.0-rc4-next-20220630 #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
Call Trace:
dump_stack_lvl+0x8b/0xb3
print_report.cold+0x5e/0x5e1
kasan_report+0xbe/0x1c0
llist_del_first+0x89/0xa0
kernfs_notify_workfn+0x78/0x560
process_one_work+0xa17/0x1690
------------[ cut here ]------------
worker_thread+0x637/0x1250
WARNING: CPU: 0 PID: 4876 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
kthread+0x2f2/0x3b0
CPU: 0 PID: 4876 Comm: syz-executor.2 Tainted: G W 5.19.0-rc4-next-20220630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
ret_from_fork+0x22/0x30
RIP: 0010:kernfs_get.part.0+0x69/0x80
Code: 31 ff 89 ee e8 c8 0b a7 ff 85 ed 74 18 e8 ef 0e a7 ff be 04 00 00 00 48 89 df e8 c2 c3 d9 ff f0 ff 03 5b 5d c3 e8 d7 0e a7 ff <0f> 0b eb df 48 89 df e8 6b c0 d9 ff eb c6 66 0f 1f 84 00 00 00 00
RSP: 0018:ffff88801815fa60 EFLAGS: 00010012
Allocated by task 299:
RAX: 000000000001eb1a RBX: ffff88800ee04bc8 RCX: ffffc900017eb000
kasan_save_stack+0x1e/0x40
RDX: 0000000000040000 RSI: ffffffff819d50a9 RDI: 0000000000000005
__kasan_slab_alloc+0x66/0x80
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
kmem_cache_alloc+0x1b1/0x490
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
__kernfs_new_node+0xd4/0x8b0
R13: 1ffffffff0a01e40 R14: ffff88800ee04bc8 R15: ffff88801716c490
kernfs_new_node+0x93/0x120
FS: 00007f7f462c4700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
__kernfs_create_file+0x51/0x350
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
cgroup_addrm_files+0x3e2/0x9d0
CR2: 00007f8a7dfef008 CR3: 000000000d564000 CR4: 0000000000350ef0
css_populate_dir+0x19b/0x450
Call Trace:
cgroup_apply_control_enable+0x3ae/0xa40
cgroup_mkdir+0x824/0x11f0
kernfs_get+0x1b/0x30
kernfs_iop_mkdir+0x149/0x1d0
kernfs_notify+0x180/0x350
vfs_mkdir+0x417/0x6a0
cgroup_file_notify+0xf5/0x1a0
do_mkdirat+0x17b/0x2e0
try_charge_memcg+0x461/0x13c0
__x64_sys_mkdir+0xf2/0x140
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
Freed by task 35:
kasan_save_stack+0x1e/0x40
mem_cgroup_charge_skmem+0x7c/0x1b0
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
____kasan_slab_free+0x14b/0x1a0
kmem_cache_free+0xfb/0x600
sock_setsockopt+0x203e/0x3490
kernfs_put.part.0+0x2c7/0x540
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
__sys_setsockopt+0x258/0x2a0
ret_from_fork+0x22/0x30
The buggy address belongs to the object at ffff88800ee04bc8
which belongs to the cache kernfs_node_cache of size 168
__x64_sys_setsockopt+0xba/0x150
The buggy address is located 128 bytes inside of
168-byte region [ffff88800ee04bc8, ffff88800ee04c70)
do_syscall_64+0x3b/0x90
The buggy address belongs to the physical page:
entry_SYSCALL_64_after_hwframe+0x46/0xb0
page:00000000b376ee23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee04
RIP: 0033:0x7f7f48d4eb19
flags: 0x100000000000200(slab|node=0|zone=1)
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
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080718c0
RSP: 002b:00007f7f462c4188 EFLAGS: 00000246
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
ORIG_RAX: 0000000000000036
page dumped because: kasan: bad access detected
RAX: ffffffffffffffda RBX: 00007f7f48e61f60 RCX: 00007f7f48d4eb19
RDX: 0000000000000049 RSI: 0000000000000001 RDI: 0000000000000008
Memory state around the buggy address:
RBP: 00007f7f48da8f6d R08: 0000000000000010 R09: 0000000000000000
ffff88800ee04b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
ffff88800ee04b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
R13: 00007fff8f14137f R14: 00007f7f462c4300 R15: 0000000000022000
>ffff88800ee04c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
^
irq event stamp: 7354
ffff88800ee04c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00
hardirqs last enabled at (7353): [] asm_sysvec_apic_timer_interrupt+0x1b/0x20
ffff88800ee04d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
hardirqs last disabled at (7354): [] _raw_spin_lock_irqsave+0x4e/0x50
==================================================================
softirqs last enabled at (3882): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (3857): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 2552 bytes leftover after parsing attributes in process `syz-executor.7'.
----------------
Code disassembly (best guess):
0: 20 ca and %cl,%dl
2: 66 84 e8 data16 test %ch,%al
5: 79 0c jns 0x13
7: 00 00 add %al,(%rax)
9: b8 ff ff ff ff mov $0xffffffff,%eax
e: 65 0f c1 05 14 71 e9 xadd %eax,%gs:0x7be97114(%rip) # 0x7be9712a
15: 7b
16: 83 f8 01 cmp $0x1,%eax
19: 75 22 jne 0x3d
1b: 48 f7 04 24 00 02 00 testq $0x200,(%rsp)
22: 00
23: 74 01 je 0x26
25: fb sti
26: 48 83 c4 08 add $0x8,%rsp
* 2a: 44 89 e8 mov %r13d,%eax <-- trapping instruction
2d: 5b pop %rbx
2e: 5d pop %rbp
2f: 41 5c pop %r12
31: 41 5d pop %r13
33: 41 5e pop %r14
35: 41 5f pop %r15
37: c3 retq
38: 45 31 ed xor %r13d,%r13d
3b: eb c0 jmp 0xfffffffd
3d: 0f 0b ud2
3f: 48 rex.W