==================================================================
BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:901 [inline]
BUG: KASAN: slab-use-after-free in detach_timer kernel/time/timer.c:880 [inline]
BUG: KASAN: slab-use-after-free in expire_timers+0x476/0x4b0 kernel/time/timer.c:1734
Write of size 8 at addr ffff8880795a5500 by task kworker/u4:6/1079
CPU: 0 PID: 1079 Comm: kworker/u4:6 Not tainted 6.3.0-syzkaller-07978-gb9850ec0027c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: bat_events batadv_nc_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
print_report mm/kasan/report.c:430 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:536
__hlist_del include/linux/list.h:901 [inline]
detach_timer kernel/time/timer.c:880 [inline]
expire_timers+0x476/0x4b0 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: c6 cc 8c 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be a8 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 8b 05 4d f9 7f 7e 89 c1 48 8b 34 24 81 e1 00 01 00
RSP: 0018:ffffc9000563fc80 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff89d6adcf RDI: ffff888020aaa1fc
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000563fda8
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000002ca
rcu_lock_release include/linux/rcupdate.h:332 [inline]
rcu_read_unlock include/linux/rcupdate.h:806 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x859/0xfe0 net/batman-adv/network-coding.c:719
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Allocated by task 9270:
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:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc_node+0x61/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:580 [inline]
kvmalloc_node+0x76/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:698 [inline]
kvzalloc include/linux/slab.h:706 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10626
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3315
rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
__rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3660
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
____sys_sendmsg+0x71c/0x900 net/socket.c:2503
___sys_sendmsg+0x110/0x1b0 net/socket.c:2557
__sys_sendmsg+0xf7/0x1c0 net/socket.c:2586
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 1079:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
kvfree+0x46/0x50 mm/util.c:649
device_release+0xa3/0x240 drivers/base/core.c:2436
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:729
netdev_run_todo+0x762/0x1100 net/core/dev.c:10400
default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11392
ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x625/0x1120 kernel/workqueue.c:1524
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
Second to last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x625/0x1120 kernel/workqueue.c:1524
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
The buggy address belongs to the object at ffff8880795a4000
which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 5376 bytes inside of
freed 8192-byte region [ffff8880795a4000, ffff8880795a6000)
The buggy address belongs to the physical page:
page:ffffea0001e56800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x795a0
head:ffffea0001e56800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888073ae0801
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff88801244f640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000020002 00000001ffffffff ffff888073ae0801
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 9270, tgid 9269 (syz-executor.2), ts 289488345596, free_ts 283606311107
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:2546
prep_new_page mm/page_alloc.c:2553 [inline]
get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2277
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x390 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc_node+0x51/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:580 [inline]
kvmalloc_node+0x76/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:698 [inline]
kvzalloc include/linux/slab.h:706 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10626
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3315
rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
__rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3660
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1454 [inline]
free_pcp_prepare+0x5da/0xa60 mm/page_alloc.c:1504
free_unref_page_prepare mm/page_alloc.c:3388 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3483
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:710 [inline]
slab_alloc_node mm/slub.c:3452 [inline]
kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3497
__alloc_skb+0x288/0x330 net/core/skbuff.c:644
alloc_skb include/linux/skbuff.h:1288 [inline]
__ip6_append_data.isra.0+0x313d/0x43c0 net/ipv6/ip6_output.c:1697
ip6_append_data+0x1f4/0x550 net/ipv6/ip6_output.c:1867
rawv6_sendmsg+0x159b/0x3d50 net/ipv6/raw.c:918
inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
____sys_sendmsg+0x334/0x900 net/socket.c:2503
___sys_sendmsg+0x110/0x1b0 net/socket.c:2557
__sys_sendmmsg+0x18f/0x460 net/socket.c:2643
Memory state around the buggy address:
ffff8880795a5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880795a5480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880795a5500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880795a5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880795a5600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: cc int3
1: 8c 02 mov %es,(%rdx)
3: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
9: f3 0f 1e fa endbr64
d: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi
14: e8 b0 ff ff ff callq 0xffffffc9
19: 31 c0 xor %eax,%eax
1b: c3 retq
1c: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
23: 00 00 00 00
27: 66 90 xchg %ax,%ax
* 29: f3 0f 1e fa endbr64 <-- trapping instruction
2d: 65 8b 05 4d f9 7f 7e mov %gs:0x7e7ff94d(%rip),%eax # 0x7e7ff981
34: 89 c1 mov %eax,%ecx
36: 48 8b 34 24 mov (%rsp),%rsi
3a: 81 .byte 0x81
3b: e1 00 loope 0x3d
3d: 01 00 add %eax,(%rax)