Out of memory (oom_kill_allocating_task): Killed process 265 (syz-fuzzer) total-vm:1171280kB, anon-rss:185704kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:808kB oom_score_adj:0
------------[ cut here ]------------
kernfs_put: ssh.service/memory.events.local: released with incorrect active_ref 0
WARNING: CPU: 0 PID: 5907 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 0 PID: 5907 Comm: kworker/0:0 Not tainted 5.19.0-rc5-next-20220705 #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 73 0b a7 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 e0 58 72 84 e8 93 ac 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:ffff88804575fbd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888009b63580 RSI: ffffffff812bd348 RDI: ffffed1008aebf6d
RBP: ffff88800f554dd0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff88800f554d98
R13: ffff8880184e6ae0 R14: 0000000000000000 R15: ffff888014a2f600
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004666b6 CR3: 0000000017686000 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
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
irq event stamp: 3731471
hardirqs last enabled at (3731483): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (3731494): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (3728564): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (3728555): [] __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 ffff888038867a78 by task kworker/0:0/5907
CPU: 0 PID: 5907 Comm: kworker/0:0 Tainted: G W 5.19.0-rc5-next-20220705 #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+0xb1/0x1b0
llist_del_first+0x89/0xa0
kernfs_notify_workfn+0x78/0x560
------------[ cut here ]------------
process_one_work+0xa0f/0x1690
WARNING: CPU: 1 PID: 289 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
worker_thread+0x637/0x1250
CPU: 1 PID: 289 Comm: syz-executor.3 Tainted: G W 5.19.0-rc5-next-20220705 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
kthread+0x2ed/0x3a0
RIP: 0010:kernfs_get.part.0+0x69/0x80
Code: 31 ff 89 ee e8 c8 0c a7 ff 85 ed 74 18 e8 ef 0f a7 ff be 04 00 00 00 48 89 df e8 d2 ba d9 ff f0 ff 03 5b 5d c3 e8 d7 0f a7 ff <0f> 0b eb df 48 89 df e8 7b b7 d9 ff eb c6 66 0f 1f 84 00 00 00 00
ret_from_fork+0x22/0x30
RSP: 0018:ffff88806cf09c80 EFLAGS: 00010046
Allocated by task 293:
RAX: 0000000000000000 RBX: ffff88801e4c9658 RCX: 0000000000000100
kasan_save_stack+0x1e/0x40
RDX: ffff88801a7cb580 RSI: ffffffff819de5c9 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: ffff88801e4c9658 R15: ffff88804086c4f0
kernfs_new_node+0x93/0x120
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
__kernfs_create_file+0x51/0x350
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
cgroup_addrm_files+0x3e2/0x9d0
CR2: 00007f5776bac340 CR3: 00000000092dc000 CR4: 0000000000350ee0
css_populate_dir+0x19b/0x450
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
cgroup_apply_control_enable+0x3ae/0xa40
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
cgroup_mkdir+0x824/0x11f0
Call Trace:
kernfs_iop_mkdir+0x149/0x1d0
vfs_mkdir+0x417/0x6a0
kernfs_get+0x1b/0x30
do_mkdirat+0x17b/0x2e0
kernfs_notify+0x180/0x350
__x64_sys_mkdir+0xf2/0x140
cgroup_file_notify+0xf5/0x1a0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
call_timer_fn+0x17d/0x5f0
Freed by task 5907:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
__kasan_slab_free+0x108/0x190
kmem_cache_free+0xfb/0x600
__run_timers.part.0+0x65e/0xa50
kernfs_put.part.0+0x2c7/0x540
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa0f/0x1690
run_timer_softirq+0xae/0x1a0
worker_thread+0x637/0x1250
__do_softirq+0x1c8/0x8cc
kthread+0x2ed/0x3a0
__irq_exit_rcu+0x113/0x170
ret_from_fork+0x22/0x30
irq_exit_rcu+0x5/0x20
The buggy address belongs to the object at ffff8880388679f8
which belongs to the cache kernfs_node_cache of size 168
sysvec_apic_timer_interrupt+0x8e/0xc0
The buggy address is located 128 bytes inside of
168-byte region [ffff8880388679f8, ffff888038867aa0)
The buggy address belongs to the physical page:
page:00000000a680e75e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38867
asm_sysvec_apic_timer_interrupt+0x1b/0x20
flags: 0x100000000000200(slab|node=0|zone=1)
RIP: 0010:lock_acquire+0x1db/0x530
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080358c0
Code: 02 b8 ff ff ff ff 65 0f c1 05 f9 ff d8 7e 83 f8 01 0f 85 c4 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
RSP: 0018:ffff88801b30f4f0 EFLAGS: 00000206
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888038867900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RAX: dffffc0000000000 RBX: 1ffff11003661ea0 RCX: 000000009ad03b4f
ffff888038867980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa
RDX: 1ffff110034f97de RSI: 0000000000000001 RDI: 0000000000000000
>ffff888038867a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff86a5e7c7
^
R10: fffffbfff0d4bcf8 R11: 0000000000000001 R12: 0000000000000002
ffff888038867a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00
R13: 0000000000000000 R14: ffffffff852049e0 R15: 0000000000000000
ffff888038867b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
folio_memcg_lock+0x3a/0x3c0
page_remove_rmap+0x1e/0x490
unmap_page_range+0xe8f/0x2720
unmap_single_vma+0x190/0x350
unmap_vmas+0x21e/0x370
exit_mmap+0x154/0x680
mmput+0xd1/0x390
do_exit+0xa01/0x27d0
do_group_exit+0xd2/0x2f0
get_signal+0x2201/0x24b0
arch_do_signal_or_restart+0x89/0x1be0
exit_to_user_mode_prepare+0x131/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f0ab4653f76
Code: Unable to access opcode bytes at RIP 0x7f0ab4653f4c.
RSP: 002b:00007ffca26f78d8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 000000000000012b RCX: 00007f0ab4653f76
RDX: 0000000040000000 RSI: 00007ffca26f78ec RDI: 00000000ffffffff
RBP: 00007ffca26f78ec R08: 0000000000000000 R09: 0000555557546400
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0ab4769bf0
R13: 00007ffca26f79e0 R14: 0000000000000000 R15: 00000000000000f8
irq event stamp: 11345
hardirqs last enabled at (11344): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (11345): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (11294): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (11305): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
syz-executor.4: page allocation failure: order:0, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=syz4,mems_allowed=0
CPU: 1 PID: 13562 Comm: syz-executor.4 Tainted: G B W 5.19.0-rc5-next-20220705 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
warn_alloc.cold+0x95/0x18a
__alloc_pages_slowpath.constprop.0+0x1bf1/0x2180
__alloc_pages+0x421/0x4f0
alloc_pages+0x1a0/0x2f0
relay_open_buf.part.0+0x2a4/0xc00
relay_open+0x544/0xa50
do_blk_trace_setup+0x4bc/0xb60
__blk_trace_setup+0xca/0x180
blk_trace_setup+0x43/0x60
sg_ioctl+0x6a8/0x2820
__x64_sys_ioctl+0x196/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f2f0bca0b19
Code: Unable to access opcode bytes at RIP 0x7f2f0bca0aef.
RSP: 002b:00007f2f09216188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2f0bdb3f60 RCX: 00007f2f0bca0b19
RDX: 0000000020000000 RSI: 00000000c0481273 RDI: 0000000000000006
RBP: 00007f2f0bcfaf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4f79a2bf R14: 00007f2f09216300 R15: 0000000000022000
Mem-Info:
active_anon:9943 inactive_anon:45697 isolated_anon:0
active_file:13 inactive_file:46 isolated_file:0
unevictable:0 dirty:0 writeback:0
slab_reclaimable:7745 slab_unreclaimable:64596
mapped:69672 shmem:109 pagetables:1655 bounce:0
kernel_misc_reclaimable:0
free:2011 free_pcp:0 free_cma:0
Node 0 active_anon:39772kB inactive_anon:182788kB active_file:52kB inactive_file:184kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:278688kB dirty:0kB writeback:0kB shmem:436kB writeback_tmp:0kB kernel_stack:4480kB pagetables:6620kB all_unreclaimable? no
Node 0 DMA free:6480kB boost:0kB min:44kB low:56kB high:68kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 1615 1615 1615
Node 0 DMA32 free:1564kB boost:0kB min:5120kB low:6772kB high:8424kB reserved_highatomic:2048KB active_anon:39772kB inactive_anon:182788kB active_file:212kB inactive_file:308kB unevictable:0kB writepending:0kB present:2080640kB managed:1658288kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 0*4kB 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 1*256kB (U) 0*512kB 0*1024kB 1*2048kB (M) 1*4096kB (M) = 6480kB
Node 0 DMA32: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 1*256kB (H) 2*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 1280kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
215 total pagecache pages
0 pages in swap cache
Free swap = 0kB
Total swap = 0kB
524158 pages RAM
0 pages HighMem/MovableOnly
105746 pages reserved
oom_reaper: reaped process 13562 (syz-executor.4), now anon-rss:0kB, file-rss:34816kB, shmem-rss:0kB
general protection fault, probably for non-canonical address 0x221ec109e39c3c8: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 1 Comm: systemd Tainted: G B W 5.19.0-rc5-next-20220705 #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+0xaf/0x190
Code: 80 4c 01 c2 0f 82 f0 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 63 84 7b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 41 84 7b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff8880081b77c0 EFLAGS: 00010207
RAX: 0221ec109e39c3c0 RBX: 88800ca78e70fbe0 RCX: 00000000802effff
RDX: 88800ca80e70fbe0 RSI: ffffea0000329e00 RDI: 0000000040000000
RBP: 0000000000000000 R08: 88800ca78e70fbe0 R09: 00000000802effff
R10: ffffea0000329e00 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880081b7800 R14: 0000000000000000 R15: ffff88800ca78afe
FS: 00007f57760b8900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb0ce63260 CR3: 00000000092dc000 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
__create_object.isra.0+0x3d/0xc10
kmem_cache_alloc+0x247/0x490
anon_vma_fork+0x1ce/0x610
dup_mmap+0x993/0xf40
dup_mm+0x91/0x370
copy_process+0x6941/0x6d60
kernel_clone+0xe7/0xa60
__do_sys_clone+0xba/0x100
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f57768624bb
Code: ed 0f 85 f8 00 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 41 89 c5 85 c0 0f 85 9e 00 00
RSP: 002b:00007ffd63954520 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000561f87bb9ca8 RCX: 00007f57768624bb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f57760b8900
R10: 00007f57760b8bd0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000561f87b81bf0 R14: 0000000000000000 R15: 0000561f87c015d0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qlist_free_all+0xaf/0x190
Code: 80 4c 01 c2 0f 82 f0 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 63 84 7b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 41 84 7b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff8880081b77c0 EFLAGS: 00010207
RAX: 0221ec109e39c3c0 RBX: 88800ca78e70fbe0 RCX: 00000000802effff
RDX: 88800ca80e70fbe0 RSI: ffffea0000329e00 RDI: 0000000040000000
RBP: 0000000000000000 R08: 88800ca78e70fbe0 R09: 00000000802effff
R10: ffffea0000329e00 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880081b7800 R14: 0000000000000000 R15: ffff88800ca78afe
FS: 00007f57760b8900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb0ce63260 CR3: 00000000092dc000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 02 b8 ff ff ff ff add -0x1(%rax),%bh
6: 65 0f c1 05 f9 ff d8 xadd %eax,%gs:0x7ed8fff9(%rip) # 0x7ed90007
d: 7e
e: 83 f8 01 cmp $0x1,%eax
11: 0f 85 c4 02 00 00 jne 0x2db
17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx)
3b: 00
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 84 .byte 0x84
3f: 24 .byte 0x24