==================================================================
BUG: KASAN: use-after-free in inet_twsk_kill+0x358/0x3c0 net/ipv4/inet_timewait_sock.c:46
Read of size 8 at addr ffff88801c6a39c0 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
inet_twsk_kill+0x358/0x3c0 net/ipv4/inet_timewait_sock.c:46
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_task_switch.isra.0+0x323/0xb80 kernel/sched/core.c:4866
Code: d3 cc fb 07 85 c0 75 02 0f 0b 48 85 db 0f 85 25 01 00 00 4c 89 f7 e8 fc f7 ff ff e8 e7 7e 2d 00 fb 65 48 8b 1c 25 00 70 02 00 <48> 8d bb 80 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90000d57c68 EFLAGS: 00000206
RAX: 000000000015f041 RBX: ffff888011935700 RCX: 1ffffffff1b28941
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000d57cb0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817e98b8 R11: 0000000000000001 R12: ffff8880b9d3a958
R13: ffff88801b77d700 R14: ffff8880b9d39c00 R15: ffff8880b9d3a638
context_switch kernel/sched/core.c:4989 [inline]
__schedule+0xaba/0x4e90 kernel/sched/core.c:6296
schedule_idle+0x57/0x90 kernel/sched/core.c:6397
do_idle+0x303/0x590 kernel/sched/idle.c:334
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:272
secondary_startup_64_no_verify+0xc3/0xcb
Allocated by task 3616:
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:437 [inline]
__kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470
kasan_slab_alloc include/linux/kasan.h:260 [inline]
slab_post_alloc_hook mm/slab.h:732 [inline]
slab_alloc_node mm/slub.c:3230 [inline]
slab_alloc mm/slub.c:3238 [inline]
kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3243
kmem_cache_zalloc include/linux/slab.h:705 [inline]
net_alloc net/core/net_namespace.c:407 [inline]
copy_net_ns+0x125/0x760 net/core/net_namespace.c:462
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
ksys_unshare+0x445/0x920 kernel/fork.c:3048
__do_sys_unshare kernel/fork.c:3119 [inline]
__se_sys_unshare kernel/fork.c:3117 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:3117
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Last potentially related work creation:
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1368
__queue_work+0x5ca/0xee0 kernel/workqueue.c:1534
queue_work_on+0xee/0x110 kernel/workqueue.c:1562
queue_work include/linux/workqueue.h:502 [inline]
schedule_work include/linux/workqueue.h:563 [inline]
xfrm_hash_grow_check net/xfrm/xfrm_state.c:1025 [inline]
xfrm_hash_grow_check net/xfrm/xfrm_state.c:1020 [inline]
xfrm_state_find+0x4ae8/0x4f00 net/xfrm/xfrm_state.c:1185
xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2393 [inline]
xfrm_tmpl_resolve+0x2f3/0xd40 net/xfrm/xfrm_policy.c:2438
xfrm_resolve_and_create_bundle+0x123/0x25a0 net/xfrm/xfrm_policy.c:2726
xfrm_lookup_with_ifid+0x22a/0x2220 net/xfrm/xfrm_policy.c:3060
xfrm_lookup net/xfrm/xfrm_policy.c:3189 [inline]
xfrm_lookup_route+0x36/0x1e0 net/xfrm/xfrm_policy.c:3200
ip6_dst_lookup_flow+0x159/0x1d0 net/ipv6/ip6_output.c:1206
rawv6_sendmsg+0xc5f/0x3a10 net/ipv6/raw.c:928
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
____sys_sendmsg+0x331/0x810 net/socket.c:2413
___sys_sendmsg+0xf3/0x170 net/socket.c:2467
__sys_sendmmsg+0x195/0x470 net/socket.c:2553
__do_sys_sendmmsg net/socket.c:2582 [inline]
__se_sys_sendmmsg net/socket.c:2579 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Second to last potentially related work creation:
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1368
__queue_work+0x5ca/0xee0 kernel/workqueue.c:1534
queue_work_on+0xee/0x110 kernel/workqueue.c:1562
queue_work include/linux/workqueue.h:502 [inline]
schedule_work include/linux/workqueue.h:563 [inline]
xfrm_hash_grow_check net/xfrm/xfrm_state.c:1025 [inline]
xfrm_hash_grow_check net/xfrm/xfrm_state.c:1020 [inline]
xfrm_state_find+0x4ae8/0x4f00 net/xfrm/xfrm_state.c:1185
xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2393 [inline]
xfrm_tmpl_resolve+0x2f3/0xd40 net/xfrm/xfrm_policy.c:2438
xfrm_resolve_and_create_bundle+0x123/0x25a0 net/xfrm/xfrm_policy.c:2726
xfrm_lookup_with_ifid+0x22a/0x2220 net/xfrm/xfrm_policy.c:3060
xfrm_lookup net/xfrm/xfrm_policy.c:3189 [inline]
xfrm_lookup_route+0x36/0x1e0 net/xfrm/xfrm_policy.c:3200
ip6_dst_lookup_flow+0x159/0x1d0 net/ipv6/ip6_output.c:1206
rawv6_sendmsg+0xc5f/0x3a10 net/ipv6/raw.c:928
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
____sys_sendmsg+0x331/0x810 net/socket.c:2413
___sys_sendmsg+0xf3/0x170 net/socket.c:2467
__sys_sendmmsg+0x195/0x470 net/socket.c:2553
__do_sys_sendmmsg net/socket.c:2582 [inline]
__se_sys_sendmmsg net/socket.c:2579 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff88801c6a3500
which belongs to the cache net_namespace of size 6528
The buggy address is located 1216 bytes inside of
6528-byte region [ffff88801c6a3500, ffff88801c6a4e80)
The buggy address belongs to the page:
page:ffffea000071a800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801c6a3500 pfn:0x1c6a0
head:ffffea000071a800 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8880794a4181
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea00014a8600 dead000000000002 ffff888015599000
raw: ffff88801c6a3500 0000000080040002 00000001ffffffff ffff8880794a4181
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3611, ts 51625452389, free_ts 51624332588
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2271
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab mm/slub.c:1944 [inline]
new_slab+0x28a/0x3b0 mm/slub.c:2004
___slab_alloc+0x87c/0xe90 mm/slub.c:3018
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
slab_alloc_node mm/slub.c:3196 [inline]
slab_alloc mm/slub.c:3238 [inline]
kmem_cache_alloc+0x35c/0x3a0 mm/slub.c:3243
kmem_cache_zalloc include/linux/slab.h:705 [inline]
net_alloc net/core/net_namespace.c:407 [inline]
copy_net_ns+0x125/0x760 net/core/net_namespace.c:462
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
ksys_unshare+0x445/0x920 kernel/fork.c:3048
__do_sys_unshare kernel/fork.c:3119 [inline]
__se_sys_unshare kernel/fork.c:3117 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:3117
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3404
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x65d/0x790 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
consume_skb net/core/skbuff.c:914 [inline]
consume_skb+0xc2/0x160 net/core/skbuff.c:908
skb_free_datagram+0x1b/0x1f0 net/core/datagram.c:325
netlink_recvmsg+0x636/0xea0 net/netlink/af_netlink.c:1998
sock_recvmsg_nosec net/socket.c:948 [inline]
sock_recvmsg net/socket.c:966 [inline]
sock_recvmsg net/socket.c:962 [inline]
____sys_recvmsg+0x2c4/0x600 net/socket.c:2632
___sys_recvmsg+0x127/0x200 net/socket.c:2674
__sys_recvmsg+0xe2/0x1a0 net/socket.c:2704
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff88801c6a3880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801c6a3900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801c6a3980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801c6a3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801c6a3a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 85 c0 test %eax,%eax
2: 75 02 jne 0x6
4: 0f 0b ud2
6: 48 85 db test %rbx,%rbx
9: 0f 85 25 01 00 00 jne 0x134
f: 4c 89 f7 mov %r14,%rdi
12: e8 fc f7 ff ff callq 0xfffff813
17: e8 e7 7e 2d 00 callq 0x2d7f03
1c: fb sti
1d: 65 48 8b 1c 25 00 70 mov %gs:0x27000,%rbx
24: 02 00
* 26: 48 8d bb 80 15 00 00 lea 0x1580(%rbx),%rdi <-- trapping instruction
2d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
34: fc ff df
37: 48 89 fa mov %rdi,%rdx
3a: 48 rex.W
3b: c1 .byte 0xc1