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BUG: KASAN: use-after-free in list_empty include/linux/list.h:282 [inline]
BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:127 [inline]
BUG: KASAN: use-after-free in wq_has_sleeper include/linux/wait.h:161 [inline]
BUG: KASAN: use-after-free in skwq_has_sleeper include/net/sock.h:2143 [inline]
BUG: KASAN: use-after-free in sock_def_write_space+0x609/0x630 net/core/sock.c:2911
Read of size 8 at addr ffff888043fb9080 by task kworker/0:9/22347
CPU: 0 PID: 22347 Comm: kworker/0:9 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events iterate_cleanup_work
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
list_empty include/linux/list.h:282 [inline]
waitqueue_active include/linux/wait.h:127 [inline]
wq_has_sleeper include/linux/wait.h:161 [inline]
skwq_has_sleeper include/net/sock.h:2143 [inline]
sock_def_write_space+0x609/0x630 net/core/sock.c:2911
sock_wfree+0x1cc/0x240 net/core/sock.c:2038
skb_release_head_state+0x9f/0x250 net/core/skbuff.c:651
skb_release_all net/core/skbuff.c:662 [inline]
_kfree_skb_defer net/core/skbuff.c:872 [inline]
napi_consume_skb net/core/skbuff.c:917 [inline]
napi_consume_skb+0x12e/0x370 net/core/skbuff.c:894
free_old_xmit_skbs+0xd5/0x230 drivers/net/virtio_net.c:1389
virtnet_poll_tx+0x1e9/0x370 drivers/net/virtio_net.c:1516
napi_poll net/core/dev.c:6687 [inline]
net_rx_action+0x4a1/0xe80 net/core/dev.c:6757
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
common_interrupt+0xa3/0x1f0 arch/x86/kernel/irq.c:239
asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:572
RIP: 0010:arch_local_irq_restore+0x34/0x50 arch/x86/include/asm/paravirt.h:771
Code: fb 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 18 48 83 3d 41 e6 5c 08 00 74 0c 48 89 df 57 9d 0f 1f 44 00 00 5b 0f 0b 48 c7 c7 c8 3b b6 89 e8 fd 01 5b 00 eb da 90 66 2e 0f 1f
RSP: 0018:ffffc9000edcfb50 EFLAGS: 00000286
RAX: 1ffffffff136c779 RBX: 0000000000000002 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: ffffffff89bd68a0 RDI: 0000000000000286
RBP: ffff8880946641c0 R08: 0000000000000001 R09: ffffffff8c5f8ad7
R10: fffffbfff18bf15a R11: 0000000000000001 R12: 0000000000000000
R13: ffff888094664aa8 R14: ffff888094664ad0 R15: 0000000000000286
lock_is_held_type+0xbb/0xf0 kernel/locking/lockdep.c:5044
lock_is_held include/linux/lockdep.h:267 [inline]
___might_sleep+0x22b/0x2f0 kernel/sched/core.c:7265
get_next_corpse net/netfilter/nf_conntrack_core.c:2227 [inline]
nf_ct_iterate_cleanup+0xb1/0x330 net/netfilter/nf_conntrack_core.c:2249
nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2334 [inline]
nf_ct_iterate_cleanup_net+0x113/0x170 net/netfilter/nf_conntrack_core.c:2319
iterate_cleanup_work+0x45/0x130 net/netfilter/nf_nat_masquerade.c:216
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Allocated by task 31753:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
slab_post_alloc_hook mm/slab.h:518 [inline]
slab_alloc mm/slab.c:3312 [inline]
kmem_cache_alloc+0x138/0x3a0 mm/slab.c:3482
sock_alloc_inode+0x18/0x1c0 net/socket.c:253
alloc_inode+0x61/0x230 fs/inode.c:232
new_inode_pseudo+0x14/0xe0 fs/inode.c:928
sock_alloc+0x3c/0x260 net/socket.c:573
__sock_create+0xb9/0x740 net/socket.c:1391
sock_create net/socket.c:1478 [inline]
__sys_socket+0xef/0x200 net/socket.c:1520
__do_sys_socket net/socket.c:1529 [inline]
__se_sys_socket net/socket.c:1527 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1527
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 31774:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
__kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422
__cache_free mm/slab.c:3418 [inline]
kmem_cache_free.part.0+0x67/0x1f0 mm/slab.c:3693
i_callback+0x3f/0x70 fs/inode.c:221
rcu_do_batch kernel/rcu/tree.c:2428 [inline]
rcu_core+0x5c7/0x1190 kernel/rcu/tree.c:2656
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
Last call_rcu():
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_record_aux_stack+0x82/0xb0 mm/kasan/generic.c:346
__call_rcu kernel/rcu/tree.c:2894 [inline]
call_rcu+0x14f/0x7e0 kernel/rcu/tree.c:2968
destroy_inode+0x129/0x1b0 fs/inode.c:287
iput_final fs/inode.c:1652 [inline]
iput.part.0+0x424/0x850 fs/inode.c:1678
iput+0x58/0x70 fs/inode.c:1668
dentry_unlink_inode+0x2b1/0x3d0 fs/dcache.c:374
__dentry_kill+0x3c0/0x640 fs/dcache.c:579
dentry_kill fs/dcache.c:705 [inline]
dput+0x725/0xbc0 fs/dcache.c:878
__fput+0x3ab/0x920 fs/file_table.c:294
task_work_run+0xdd/0x190 kernel/task_work.c:141
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:140 [inline]
exit_to_user_mode_prepare+0x195/0x1c0 kernel/entry/common.c:167
syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Second to last call_rcu():
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_record_aux_stack+0x82/0xb0 mm/kasan/generic.c:346
__call_rcu kernel/rcu/tree.c:2894 [inline]
call_rcu+0x14f/0x7e0 kernel/rcu/tree.c:2968
destroy_inode+0x129/0x1b0 fs/inode.c:287
iput_final fs/inode.c:1652 [inline]
iput.part.0+0x424/0x850 fs/inode.c:1678
iput+0x58/0x70 fs/inode.c:1668
dentry_unlink_inode+0x2b1/0x3d0 fs/dcache.c:374
__dentry_kill+0x3c0/0x640 fs/dcache.c:579
dentry_kill fs/dcache.c:705 [inline]
dput+0x725/0xbc0 fs/dcache.c:878
__fput+0x3ab/0x920 fs/file_table.c:294
task_work_run+0xdd/0x190 kernel/task_work.c:141
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:140 [inline]
exit_to_user_mode_prepare+0x195/0x1c0 kernel/entry/common.c:167
syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff888043fb9000
which belongs to the cache sock_inode_cache of size 1216
The buggy address is located 128 bytes inside of
1216-byte region [ffff888043fb9000, ffff888043fb94c0)
The buggy address belongs to the page:
page:0000000096aeccb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888043fb9ffd pfn:0x43fb9
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000214bd08 ffffea0001412288 ffff88821b773800
raw: ffff888043fb9ffd ffff888043fb9000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888043fb8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888043fb9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888043fb9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888043fb9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888043fb9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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