==================================================================
BUG: KASAN: slab-use-after-free in hlist_add_head include/linux/list.h:945 [inline]
BUG: KASAN: slab-use-after-free in enqueue_timer+0xad/0x550 kernel/time/timer.c:605
Write of size 8 at addr ffff888067e69500 by task kworker/u4:2/41
CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:351 [inline]
print_report+0x15f/0x540 mm/kasan/report.c:462
kasan_report+0x172/0x1a0 mm/kasan/report.c:572
hlist_add_head include/linux/list.h:945 [inline]
enqueue_timer+0xad/0x550 kernel/time/timer.c:605
internal_add_timer kernel/time/timer.c:634 [inline]
__mod_timer+0xa72/0xf40 kernel/time/timer.c:1131
addrconf_rs_timer+0x450/0x610 net/ipv6/addrconf.c:3945
call_timer_fn+0x170/0x560 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x64b/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2a7/0x8fc kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x230 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x256/0x520 kernel/locking/lockdep.c:5695
Code: 2b 00 74 08 4c 89 f7 e8 38 60 7a 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90000b278e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000164f28 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8aec01a0 RDI: ffffffff8b3dbb00
RBP: ffffc90000b27a40 R08: dffffc0000000000 R09: fffffbfff20a324d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000164f24
R13: dffffc0000000000 R14: ffffc90000b27940 R15: 0000000000000246
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:327
rcu_read_lock include/linux/rcupdate.h:773 [inline]
inet_twsk_purge+0x124/0xad0 net/ipv4/inet_timewait_sock.c:292
ops_exit_list net/core/net_namespace.c:175 [inline]
cleanup_net+0x763/0xb80 net/core/net_namespace.c:614
process_one_work+0x894/0x10c0 kernel/workqueue.c:2405
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2552
kthread+0x2b0/0x340 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Allocated by task 10912:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x94/0xa0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc_node+0xb4/0x220 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x6e/0x180 mm/util.c:604
kvmalloc include/linux/slab.h:697 [inline]
kvzalloc include/linux/slab.h:705 [inline]
alloc_netdev_mqs+0x85/0xf30 net/core/dev.c:10626
rtnl_create_link+0x2f3/0xc00 net/core/rtnetlink.c:3315
rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
__rtnl_newlink net/core/rtnetlink.c:3660 [inline]
rtnl_newlink+0x1375/0x2000 net/core/rtnetlink.c:3673
rtnetlink_rcv_msg+0x821/0xf40 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg net/socket.c:747 [inline]
__sys_sendto+0x471/0x630 net/socket.c:2144
__do_sys_sendto net/socket.c:2156 [inline]
__se_sys_sendto net/socket.c:2152 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2152
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 41:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:521
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook mm/slub.c:1807 [inline]
slab_free mm/slub.c:3786 [inline]
__kmem_cache_free+0x25c/0x3c0 mm/slub.c:3799
device_release+0x91/0x1c0
kobject_cleanup lib/kobject.c:683 [inline]
kobject_release lib/kobject.c:714 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x224/0x460 lib/kobject.c:731
netdev_run_todo+0xe56/0xf40 net/core/dev.c:10400
default_device_exit_batch+0x5c5/0x630 net/core/dev.c:11392
ops_exit_list net/core/net_namespace.c:175 [inline]
cleanup_net+0x763/0xb80 net/core/net_namespace.c:614
process_one_work+0x894/0x10c0 kernel/workqueue.c:2405
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2552
kthread+0x2b0/0x340 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491
insert_work+0x54/0x3d0 kernel/workqueue.c:1365
__queue_work+0xb37/0xf10 kernel/workqueue.c:1526
call_timer_fn+0x170/0x560 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1746 [inline]
__run_timers+0x676/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2a7/0x8fc kernel/softirq.c:571
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491
insert_work+0x54/0x3d0 kernel/workqueue.c:1365
__queue_work+0xb37/0xf10 kernel/workqueue.c:1526
call_timer_fn+0x170/0x560 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1746 [inline]
__run_timers+0x676/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2a7/0x8fc kernel/softirq.c:571
The buggy address belongs to the object at ffff888067e68000
which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 5376 bytes inside of
freed 8192-byte region [ffff888067e68000, ffff888067e6a000)
The buggy address belongs to the physical page:
page:ffffea00019f9a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888067e6c000 pfn:0x67e68
head:ffffea00019f9a00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880183231a1
anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff88801244f640 0000000000000000 dead000000000001
raw: ffff888067e6c000 0000000080020001 00000001ffffffff ffff8880183231a1
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5776, tgid 5776 (syz-executor.5), ts 102451494109, free_ts 13594761170
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1d2/0x1f0 mm/page_alloc.c:1722
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0x31f8/0x3370 mm/page_alloc.c:3493
__alloc_pages+0x251/0x660 mm/page_alloc.c:4759
alloc_slab_page+0x6a/0x150 mm/slub.c:1851
allocate_slab mm/slub.c:1998 [inline]
new_slab+0x84/0x2d0 mm/slub.c:2051
___slab_alloc+0xa71/0x1080 mm/slub.c:3192
__slab_alloc mm/slub.c:3291 [inline]
__slab_alloc_node mm/slub.c:3344 [inline]
slab_alloc_node mm/slub.c:3441 [inline]
__kmem_cache_alloc_node+0x1b4/0x280 mm/slub.c:3490
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc_node+0xa3/0x220 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x6e/0x180 mm/util.c:604
kvmalloc include/linux/slab.h:697 [inline]
kvzalloc include/linux/slab.h:705 [inline]
netif_alloc_netdev_queues net/core/dev.c:9948 [inline]
alloc_netdev_mqs+0x841/0xf30 net/core/dev.c:10687
rtnl_create_link+0x2f3/0xc00 net/core/rtnetlink.c:3315
rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
__rtnl_newlink net/core/rtnetlink.c:3660 [inline]
rtnl_newlink+0x1375/0x2000 net/core/rtnetlink.c:3673
rtnetlink_rcv_msg+0x821/0xf40 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x8ee/0xa10 mm/page_alloc.c:2555
free_unref_page+0x33/0x3f0 mm/page_alloc.c:2650
free_contig_range+0x9a/0x150 mm/page_alloc.c:6985
destroy_args+0xfe/0x9a0 mm/debug_vm_pgtable.c:1023
debug_vm_pgtable+0x401/0x480 mm/debug_vm_pgtable.c:1403
do_one_initcall+0x239/0x7c0 init/main.c:1246
do_initcall_level+0x157/0x210 init/main.c:1319
do_initcalls+0x3f/0x80 init/main.c:1335
kernel_init_freeable+0x437/0x5c0 init/main.c:1571
kernel_init+0x19/0x290 init/main.c:1462
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Memory state around the buggy address:
ffff888067e69400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888067e69480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888067e69500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888067e69580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888067e69600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 2b 00 sub (%rax),%eax
2: 74 08 je 0xc
4: 4c 89 f7 mov %r14,%rdi
7: e8 38 60 7a 00 callq 0x7a6044
c: f6 44 24 61 02 testb $0x2,0x61(%rsp)
11: 0f 85 84 01 00 00 jne 0x19b
17: 41 f7 c7 00 02 00 00 test $0x200,%r15d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp)
28: e0 45
* 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 25 09 00 00 movl $0x0,0x9(%r13,%r12,1)
3a: 00 00
3c: 43 rex.XB
3d: c7 .byte 0xc7
3e: 44 rex.R
3f: 25 .byte 0x25