==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
Read of size 8 at addr ffff888021afc018 by task syslogd/4816
CPU: 3 UID: 0 PID: 4816 Comm: syslogd Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
__lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:397 [inline]
p9_req_put net/9p/client.c:405 [inline]
p9_req_put+0xaf/0x250 net/9p/client.c:402
req_done+0x1e7/0x2f0 net/9p/trans_virtio.c:147
vring_interrupt drivers/virtio/virtio_ring.c:2595 [inline]
vring_interrupt+0x31b/0x400 drivers/virtio/virtio_ring.c:2570
__handle_irq_event_percpu+0x229/0x7c0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285
common_interrupt+0x52/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 6a 23 50 f6 48 89 df e8 82 a0 50 f6 e8 6d 7f 79 f6 fb bf 01 00 00 00 b2 13 42 f6 65 8b 05 33 4e ea 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90000908eb8 EFLAGS: 00000206
RAX: 00000000000156b4 RBX: ffff88806a92a840 RCX: 1ffffffff2d2d756
RDX: 0000000000000000 RSI: ffffffff8b4cd740 RDI: 0000000000000001
RBP: 1ffff920001211d9 R08: 0000000000000001 R09: fffffbfff2d244f7
R10: ffffffff969227bf R11: 0000000000000000 R12: 0000000000000001
R13: 0000000080000101 R14: ffffffff8da0a0c8 R15: 0000000000000003
__run_timer_base kernel/time/timer.c:2429 [inline]
__run_timer_base kernel/time/timer.c:2421 [inline]
run_timer_base+0x119/0x190 kernel/time/timer.c:2437
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:209
Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 a4 1a 78 7e 65 8b 05 a5 1a 78 7e a9 00 01
RSP: 0018:ffffc900044e7478 EFLAGS: 00000212
RAX: 0000000000000000 RBX: ffffffff9082a980 RCX: ffffffff813cd424
RDX: ffff88802cdd4880 RSI: ffffffff88e569d6 RDI: 0000000000000006
RBP: ffffffff9082a9a0 R08: 0000000000000006 R09: ffffffff88e569d6
R10: ffffffff88e569b7 R11: 0000000000000000 R12: ffffffff88e569d6
R13: ffffffff88e569b7 R14: dffffc0000000000 R15: ffffffff9082a990
__orc_find+0x63/0x130 arch/x86/kernel/unwind_orc.c:104
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x335/0x23a0 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4598
skb_kfree_head net/core/skbuff.c:1084 [inline]
skb_free_head+0x108/0x1d0 net/core/skbuff.c:1096
skb_release_data+0x75c/0x980 net/core/skbuff.c:1123
skb_release_all net/core/skbuff.c:1188 [inline]
__kfree_skb net/core/skbuff.c:1202 [inline]
consume_skb net/core/skbuff.c:1426 [inline]
consume_skb+0xd0/0x160 net/core/skbuff.c:1420
__unix_dgram_recvmsg+0x821/0xe50 net/unix/af_unix.c:2527
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2544
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1068
sock_read_iter+0x2c7/0x3c0 net/socket.c:1138
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0xa39/0xbd0 fs/read_write.c:476
ksys_read+0x1f8/0x260 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65c8ef7b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd1f593ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f65c8ef7b6a
RDX: 00000000000000ff RSI: 00005574b070c300 RDI: 0000000000000000
RBP: 00005574b070c2c0 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f65c90963a3 R11: 0000000000000246 R12: 00005574b070c35b
R13: 00005574b070c300 R14: 0000000000000000 R15: 00007f65c90daa80
Allocated by task 5904:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc_noprof include/linux/slab.h:681 [inline]
p9_client_create+0xcf/0x1210 net/9p/client.c:983
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1800
do_new_mount fs/namespace.c:3472 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3799
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount fs/namespace.c:3997 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5904:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4598
p9_client_create+0xaaa/0x1210 net/9p/client.c:1054
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1800
do_new_mount fs/namespace.c:3472 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3799
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount fs/namespace.c:3997 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888021afc000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff888021afc000, ffff888021afc200)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21afc
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff88801ac42c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac42c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea000086bf01 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5042, tgid 5042 (S40network), ts 31753779546, free_ts 31322037403
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x4e/0xf0 mm/slub.c:2325
allocate_slab mm/slub.c:2488 [inline]
new_slab+0x84/0x260 mm/slub.c:2541
___slab_alloc+0xdac/0x1870 mm/slub.c:3727
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
__slab_alloc_node mm/slub.c:3870 [inline]
slab_alloc_node mm/slub.c:4029 [inline]
__do_kmalloc_node mm/slub.c:4161 [inline]
__kmalloc_noprof+0x367/0x400 mm/slub.c:4174
kmalloc_noprof include/linux/slab.h:685 [inline]
kzalloc_noprof include/linux/slab.h:807 [inline]
tomoyo_init_log+0x13ca/0x2180 security/tomoyo/audit.c:275
tomoyo_supervisor+0x30c/0xea0 security/tomoyo/common.c:2089
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x270/0x3b0 security/tomoyo/file.c:573
tomoyo_path_perm+0x35e/0x450 security/tomoyo/file.c:838
security_inode_getattr+0xf4/0x160 security/security.c:2269
vfs_getattr fs/stat.c:204 [inline]
vfs_fstat+0x53/0xd0 fs/stat.c:229
vfs_fstatat+0x146/0x160 fs/stat.c:338
__do_sys_newfstatat+0xa2/0x130 fs/stat.c:505
page last free pid 4843 tgid 4843 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619
rcu_do_batch kernel/rcu/tree.c:2569 [inline]
rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2843
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888021afbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888021afbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888021afc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888021afc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888021afc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: f3 0f 1e fa endbr64
5: 53 push %rbx
6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
b: 48 89 fb mov %rdi,%rbx
e: 48 83 c7 18 add $0x18,%rdi
12: e8 6a 23 50 f6 call 0xf6502381
17: 48 89 df mov %rbx,%rdi
1a: e8 82 a0 50 f6 call 0xf650a0a1
1f: e8 6d 7f 79 f6 call 0xf6797f91
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 b2 13 42 f6 call 0xf64213e1 <-- trapping instruction
2f: 65 8b 05 33 4e ea 74 mov %gs:0x74ea4e33(%rip),%eax # 0x74ea4e69
36: 85 c0 test %eax,%eax
38: 74 06 je 0x40
3a: 5b pop %rbx
3b: c3 ret
3c: cc int3
3d: cc int3
3e: cc int3
3f: cc int3