==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff88801dac6818 by task syz-executor.1/5166
CPU: 0 PID: 5166 Comm: syz-executor.1 Not tainted 6.2.0-rc2-syzkaller-00282-g0a71553536d2 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x461 mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:390 [inline]
p9_req_put net/9p/client.c:398 [inline]
p9_req_put+0xca/0x250 net/9p/client.c:395
req_done+0x1e2/0x2e0 net/9p/trans_virtio.c:147
vring_interrupt drivers/virtio/virtio_ring.c:2470 [inline]
vring_interrupt+0x2a1/0x3d0 drivers/virtio/virtio_ring.c:2445
__handle_irq_event_percpu+0x264/0x970 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+0x263/0xd00 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0xa1/0x210 arch/x86/kernel/irq.c:250
common_interrupt+0xa8/0xd0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x3c/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 66 03 5a f7 48 89 ef e8 0e 70 5a f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 0f d4 4c f7 65 8b 05 e0 9f fa 75 85 c0 74 0a 5b 5d c3 e8 7c e9
RSP: 0018:ffffc90003047ae8 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1ce3d39
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff91e27838 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff23c4f07 R11: 0000000000000000 R12: ffff88802497a540
R13: dffffc0000000000 R14: 1ffff92000608f62 R15: ffffffff8a4db9c0
debug_object_activate+0x1b7/0x3e0 lib/debugobjects.c:699
debug_rcu_head_queue kernel/rcu/rcu.h:189 [inline]
__call_rcu_common.constprop.0+0x2c/0x820 kernel/rcu/tree.c:2740
security_inode_free+0x9e/0xc0 security/security.c:1086
__destroy_inode+0x200/0x700 fs/inode.c:284
destroy_inode+0x91/0x1b0 fs/inode.c:307
iput_final fs/inode.c:1747 [inline]
iput.part.0+0x59b/0x880 fs/inode.c:1773
iput+0x5c/0x80 fs/inode.c:1763
dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
__dentry_kill+0x3c0/0x640 fs/dcache.c:607
dentry_kill fs/dcache.c:733 [inline]
dput+0x80a/0xdb0 fs/dcache.c:913
__fput+0x3cc/0xa90 fs/file_table.c:328
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efc0f83df7b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffe06450e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffe06450ea0 RCX: 00007efc0f83df7b
RDX: 0000000000000000 RSI: 00000101f6acd920 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 00007ffe064507e0
R10: 0000000000000010 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000050cde R14: 0000000000000001 R15: 00007ffe06450ee0
Allocated by task 7786:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380
kmalloc include/linux/slab.h:580 [inline]
p9_client_create+0xb3/0x1070 net/9p/client.c:975
v9fs_session_init+0x1e6/0x18b0 fs/9p/v9fs.c:407
v9fs_mount+0xbe/0xca0 fs/9p/vfs_super.c:125
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 7786:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:518
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
__cache_free mm/slab.c:3394 [inline]
__do_kmem_cache_free mm/slab.c:3580 [inline]
__kmem_cache_free+0xcd/0x3b0 mm/slab.c:3587
p9_client_create+0x7aa/0x1070 net/9p/client.c:1046
v9fs_session_init+0x1e6/0x18b0 fs/9p/v9fs.c:407
v9fs_mount+0xbe/0xca0 fs/9p/vfs_super.c:125
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:488
kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3376
ma_put net/ipv6/mcast.c:869 [inline]
ma_put+0x11c/0x180 net/ipv6/mcast.c:865
ipv6_mc_destroy_dev+0x3c4/0x630 net/ipv6/mcast.c:2810
addrconf_ifdown.isra.0+0x12c2/0x1920 net/ipv6/addrconf.c:3893
addrconf_notify+0x109/0x1c80 net/ipv6/addrconf.c:3673
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944
call_netdevice_notifiers_extack net/core/dev.c:1982 [inline]
call_netdevice_notifiers net/core/dev.c:1996 [inline]
unregister_netdevice_many_notify+0xa2b/0x19e0 net/core/dev.c:10839
ip6gre_exit_batch_net+0x4ab/0x760 net/ipv6/ip6_gre.c:1639
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff88801dac6800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
512-byte region [ffff88801dac6800, ffff88801dac6a00)
The buggy address belongs to the physical page:
page:ffffea000076b180 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801dac6c00 pfn:0x1dac6
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012440600 ffffea00006a1f90 ffffea00006f4690
raw: ffff88801dac6c00 ffff88801dac6000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2c2220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_THISNODE), pid 0, tgid 0 (swapper/0), ts 306971963399, free_ts 301506227112
prep_new_page mm/page_alloc.c:2531 [inline]
get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
__alloc_pages_slowpath.constprop.0+0x36b/0x23d0 mm/page_alloc.c:5084
__alloc_pages+0x4aa/0x5b0 mm/page_alloc.c:5562
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1363 [inline]
cache_grow_begin+0x94/0x390 mm/slab.c:2574
cache_alloc_refill+0x27f/0x380 mm/slab.c:2947
____cache_alloc mm/slab.c:3023 [inline]
____cache_alloc mm/slab.c:3006 [inline]
__do_cache_alloc mm/slab.c:3206 [inline]
slab_alloc_node mm/slab.c:3254 [inline]
__kmem_cache_alloc_node+0x44f/0x510 mm/slab.c:3544
__do_kmalloc_node mm/slab_common.c:967 [inline]
__kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:988
kmalloc_reserve net/core/skbuff.c:492 [inline]
__alloc_skb+0xe9/0x310 net/core/skbuff.c:565
skb_copy+0x13d/0x3c0 net/core/skbuff.c:1779
mac80211_hwsim_tx_frame_no_nl.isra.0+0xb67/0x12c0 drivers/net/wireless/mac80211_hwsim.c:1724
mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:2053
mac80211_hwsim_beacon_tx+0x560/0xab0 drivers/net/wireless/mac80211_hwsim.c:2116
__iterate_interfaces+0x2c8/0x550 net/mac80211/util.c:799
ieee80211_iterate_active_interfaces_atomic+0x74/0x180 net/mac80211/util.c:835
mac80211_hwsim_beacon+0x101/0x200 drivers/net/wireless/mac80211_hwsim.c:2142
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x690/0xfb0 kernel/time/hrtimer.c:1749
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1446 [inline]
free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
slab_destroy mm/slab.c:1619 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1639
cache_flusharray mm/slab.c:3365 [inline]
___cache_free+0x2ac/0x3d0 mm/slab.c:3428
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:761 [inline]
slab_alloc_node mm/slab.c:3261 [inline]
slab_alloc mm/slab.c:3270 [inline]
__kmem_cache_alloc_lru mm/slab.c:3447 [inline]
kmem_cache_alloc+0x225/0x460 mm/slab.c:3456
getname_flags.part.0+0x50/0x4f0 fs/namei.c:139
getname_flags+0x9e/0xe0 include/linux/audit.h:320
vfs_fstatat+0x77/0xb0 fs/stat.c:269
__do_sys_newfstatat+0x94/0x120 fs/stat.c:440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88801dac6700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88801dac6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801dac6800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801dac6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801dac6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 10 e8 adc %ch,%al
4: 66 03 5a f7 add -0x9(%rdx),%bx
8: 48 89 ef mov %rbp,%rdi
b: e8 0e 70 5a f7 callq 0xf75a701e
10: 81 e3 00 02 00 00 and $0x200,%ebx
16: 75 25 jne 0x3d
18: 9c pushfq
19: 58 pop %rax
1a: f6 c4 02 test $0x2,%ah
1d: 75 2d jne 0x4c
1f: 48 85 db test %rbx,%rbx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 0f d4 4c f7 callq 0xf74cd43e <-- trapping instruction
2f: 65 8b 05 e0 9f fa 75 mov %gs:0x75fa9fe0(%rip),%eax # 0x75faa016
36: 85 c0 test %eax,%eax
38: 74 0a je 0x44
3a: 5b pop %rbx
3b: 5d pop %rbp
3c: c3 retq
3d: e8 .byte 0xe8
3e: 7c e9 jl 0x29