==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:906 [inline]
BUG: KASAN: use-after-free in hlist_del_init_rcu include/linux/rculist.h:184 [inline]
BUG: KASAN: use-after-free in __xfrm_state_delete+0x3db/0x940 net/xfrm/xfrm_state.c:700
Write of size 8 at addr ffff888031433990 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:420
kasan_report+0x10b/0x140 mm/kasan/report.c:524
__hlist_del include/linux/list.h:906 [inline]
hlist_del_init_rcu include/linux/rculist.h:184 [inline]
__xfrm_state_delete+0x3db/0x940 net/xfrm/xfrm_state.c:700
xfrm_timer_handler+0x10b/0x970 net/xfrm/xfrm_state.c:631
__run_hrtimer kernel/time/hrtimer.c:1751 [inline]
__hrtimer_run_queues+0x522/0xc90 kernel/time/hrtimer.c:1815
hrtimer_run_softirq+0x173/0x290 kernel/time/hrtimer.c:1832
handle_softirqs+0x291/0x910 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:742
Code: 48 89 df e8 e7 7f 92 f7 e9 44 ff ff ff e8 0d 0b f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d d7 5b 65 00 fb f4 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48
RSP: 0018:ffffc90000177de8 EFLAGS: 000002c6
RAX: 07ea2c3c9582f900 RBX: ffffffff8a415177 RCX: 07ea2c3c9582f900
RDX: 0000000000000001 RSI: ffffffff8aac1cc0 RDI: ffffffff8afe72a0
RBP: ffffc90000177f20 R08: ffff8880b8d357db R09: 1ffff110171a6afb
R10: dffffc0000000000 R11: ffffed10171a6afc R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888018771e00 R15: 1ffff9200002efc8
default_idle_call+0x84/0xc0 kernel/sched/idle.c:109
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x3a2/0x680 kernel/sched/idle.c:323
cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:422
start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
secondary_startup_64_no_verify+0xcf/0xdb
Allocated by task 4411:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:936 [inline]
__kmalloc+0xb3/0x240 mm/slab_common.c:949
kmalloc include/linux/slab.h:568 [inline]
kzalloc include/linux/slab.h:699 [inline]
ieee802_11_parse_elems_full+0xb4/0x1240 net/mac80211/util.c:1503
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2270 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2277 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1604 [inline]
ieee80211_ibss_rx_queued_mgmt+0x3f9/0x2eb0 net/mac80211/ibss.c:1637
ieee80211_iface_process_skb net/mac80211/iface.c:1711 [inline]
ieee80211_iface_work+0x72c/0xc70 net/mac80211/iface.c:1765
cfg80211_wiphy_work+0x224/0x260 net/wireless/core.c:440
process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Freed by task 4411:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1735 [inline]
slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1761
slab_free mm/slub.c:3694 [inline]
__kmem_cache_free+0xb6/0x200 mm/slub.c:3707
ieee80211_ibss_rx_queued_mgmt+0x1b22/0x2eb0 net/mac80211/ibss.c:-1
ieee80211_iface_process_skb net/mac80211/iface.c:1711 [inline]
ieee80211_iface_work+0x72c/0xc70 net/mac80211/iface.c:1765
cfg80211_wiphy_work+0x224/0x260 net/wireless/core.c:440
process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff888031433800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 400 bytes inside of
1024-byte region [ffff888031433800, ffff888031433c00)
The buggy address belongs to the physical page:
page:ffffea0000c50c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x31430
head:ffffea0000c50c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888018441dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 32, tgid 32 (kworker/u4:2), ts 66440836081, free_ts 66375570810
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
prep_new_page mm/page_alloc.c:2567 [inline]
get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
__alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
alloc_slab_page+0x5d/0x180 mm/slub.c:1805
allocate_slab mm/slub.c:1950 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2003
___slab_alloc+0xbc5/0x1240 mm/slub.c:3161
__slab_alloc mm/slub.c:3247 [inline]
slab_alloc_node mm/slub.c:3332 [inline]
__kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3405
__do_kmalloc_node mm/slab_common.c:935 [inline]
__kmalloc_node_track_caller+0xa0/0x240 mm/slab_common.c:956
kmalloc_reserve net/core/skbuff.c:446 [inline]
__alloc_skb+0x226/0x7d0 net/core/skbuff.c:515
alloc_skb include/linux/skbuff.h:1303 [inline]
nlmsg_new include/net/netlink.h:998 [inline]
inet6_rt_notify+0xb0/0x240 net/ipv6/route.c:6250
fib6_add_rt2node net/ipv6/ip6_fib.c:1260 [inline]
fib6_add+0x1e9a/0x3ed0 net/ipv6/ip6_fib.c:1489
__ip6_ins_rt net/ipv6/route.c:1350 [inline]
ip6_route_add+0x86/0x130 net/ipv6/route.c:3900
addrconf_prefix_route net/ipv6/addrconf.c:2450 [inline]
addrconf_add_linklocal+0x449/0x6d0 net/ipv6/addrconf.c:3274
addrconf_addr_gen+0x55e/0x6a0 net/ipv6/addrconf.c:3403
addrconf_dev_config net/ipv6/addrconf.c:3448 [inline]
addrconf_init_auto_addrs+0x6f7/0xaa0 net/ipv6/addrconf.c:3527
addrconf_notify+0xacd/0xf60 net/ipv6/addrconf.c:3700
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1487 [inline]
free_pcp_prepare mm/page_alloc.c:1537 [inline]
free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414
free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509
free_slab mm/slub.c:2042 [inline]
discard_slab mm/slub.c:2048 [inline]
__unfreeze_partials+0x188/0x1e0 mm/slub.c:2598
put_cpu_partial+0x17c/0x250 mm/slub.c:2674
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:306
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x4b/0x490 mm/slab.h:742
slab_alloc_node mm/slub.c:3366 [inline]
kmem_cache_alloc_node+0x1ad/0x310 mm/slub.c:3411
__alloc_skb+0xf9/0x7d0 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1303 [inline]
mld_newpack+0x12d/0xc10 net/ipv6/mcast.c:1773
add_grhead net/ipv6/mcast.c:1884 [inline]
add_grec+0x1466/0x19c0 net/ipv6/mcast.c:2023
mld_send_cr net/ipv6/mcast.c:2146 [inline]
mld_ifc_work+0x6eb/0xab0 net/ipv6/mcast.c:2688
process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
Memory state around the buggy address:
ffff888031433880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888031433900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888031433980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888031433a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888031433a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 48 89 df mov %rbx,%rdi
3: e8 e7 7f 92 f7 call 0xf7927fef
8: e9 44 ff ff ff jmp 0xffffff51
d: e8 0d 0b f6 ff call 0xfff60b1f
12: 00 00 add %al,(%rax)
14: cc int3
15: cc int3
16: 00 00 add %al,(%rax)
18: cc int3
19: cc int3
1a: 00 00 add %al,(%rax)
1c: cc int3
1d: cc int3
1e: 00 66 90 add %ah,-0x70(%rsi)
21: 0f 00 2d d7 5b 65 00 verw 0x655bd7(%rip) # 0x655bff
28: fb sti
29: f4 hlt
* 2a: c3 ret <-- trapping instruction
2b: 0f 1f 40 00 nopl 0x0(%rax)
2f: 41 57 push %r15
31: 41 56 push %r14
33: 53 push %rbx
34: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
3b: fc ff df
3e: 65 gs
3f: 48 rex.W