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BUG: KASAN: slab-out-of-bounds in selinux_sock security/selinux/include/objsec.h:207 [inline]
BUG: KASAN: slab-out-of-bounds in selinux_ip_output+0x1e0/0x1f0 security/selinux/hooks.c:5761
Read of size 8 at addr ffff88807ef32498 by task syz.2.3912/21192
CPU: 0 UID: 0 PID: 21192 Comm: syz.2.3912 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
selinux_sock security/selinux/include/objsec.h:207 [inline]
selinux_ip_output+0x1e0/0x1f0 security/selinux/hooks.c:5761
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ip6_xmit+0xd44/0x2130 net/ipv6/ip6_output.c:366
tcp_v6_send_response+0x11d9/0x25e0 net/ipv6/tcp_ipv6.c:999
tcp_v6_send_ack net/ipv6/tcp_ipv6.c:1152 [inline]
tcp_v6_timewait_ack net/ipv6/tcp_ipv6.c:1199 [inline]
tcp_v6_rcv+0x2c9c/0x3fd0 net/ipv6/tcp_ipv6.c:1993
ip6_protocol_deliver_rcu+0x180/0x1510 net/ipv6/ip6_input.c:436
ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:481
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_input+0xa1/0xd0 net/ipv6/ip6_input.c:490
dst_input include/net/dst.h:460 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ipv6_rcv+0x265/0x680 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5672
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5785
process_backlog+0x443/0x15f0 net/core/dev.c:6117
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6877
napi_poll net/core/dev.c:6946 [inline]
net_rx_action+0xa94/0x1010 net/core/dev.c:7068
handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
do_softirq kernel/softirq.c:455 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:442
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x8b0/0x43e0 net/core/dev.c:4461
dev_queue_xmit include/linux/netdevice.h:3168 [inline]
neigh_hh_output include/net/neighbour.h:523 [inline]
neigh_output include/net/neighbour.h:537 [inline]
ip6_finish_output2+0x1801/0x2070 net/ipv6/ip6_output.c:141
__ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
dst_output include/net/dst.h:450 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_xmit+0x1234/0x2130 net/ipv6/ip6_output.c:366
inet6_csk_xmit+0x3ce/0x740 net/ipv6/inet6_connection_sock.c:135
__tcp_transmit_skb+0x1b02/0x3df0 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_write_xmit+0x12b1/0x8560 net/ipv4/tcp_output.c:2827
__tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3010
tcp_send_fin+0x154/0xc70 net/ipv4/tcp_output.c:3616
__tcp_close+0x96b/0xff0 net/ipv4/tcp.c:3130
tcp_close+0x28/0x120 net/ipv4/tcp.c:3221
inet_release+0x13c/0x280 net/ipv4/af_inet.c:435
inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:487
__sock_release+0xb0/0x270 net/socket.c:640
sock_close+0x1c/0x30 net/socket.c:1408
__fput+0x3f8/0xb60 fs/file_table.c:450
task_work_run+0x14e/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9b3c17e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff83d5bca8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000140700 RCX: 00007f9b3c17e819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9b3c337ba0 R08: 0000000000000001 R09: 00007fff83d5bf9f
R10: 00007f9b3c000000 R11: 0000000000000246 R12: 0000000000141378
R13: 00007f9b3c336080 R14: 0000000000000032 R15: ffffffffffffffff
The buggy address belongs to the object at ffff88807ef32420
which belongs to the cache tw_sock_TCPv6 of size 288
The buggy address is located 120 bytes inside of
allocated 288-byte region [ffff88807ef32420, ffff88807ef32540)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ef32
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801fba0501
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88814d000a00 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080170017 00000001f5000000 ffff88801fba0501
head: 00fff00000000040 ffff88814d000a00 dead000000000122 0000000000000000
head: 0000000000000000 0000000080170017 00000001f5000000 ffff88801fba0501
head: 00fff00000000001 ffffea0001fbcc81 ffffffffffffffff 0000000000000000
head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 24, tgid 24 (ksoftirqd/1), ts 109885780209, free_ts 108837033225
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2412 [inline]
allocate_slab mm/slub.c:2578 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2631
___slab_alloc+0xdac/0x1880 mm/slub.c:3818
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4141
inet_twsk_alloc+0x120/0x970 net/ipv4/inet_timewait_sock.c:188
tcp_time_wait+0x5f/0xe10 net/ipv4/tcp_minisocks.c:309
tcp_rcv_state_process+0x4935/0x4c40 net/ipv4/tcp_input.c:6917
tcp_v4_do_rcv+0x1ad/0xa90 net/ipv4/tcp_ipv4.c:1939
tcp_v4_rcv+0x33a8/0x4390 net/ipv4/tcp_ipv4.c:2351
ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
page last free pid 6619 tgid 6618 stack trace:
create_dummy_stack mm/page_owner.c:94 [inline]
register_dummy_stack+0x8a/0xd0 mm/page_owner.c:100
init_page_owner+0x48/0xc00 mm/page_owner.c:118
invoke_init_callbacks mm/page_ext.c:148 [inline]
page_ext_init+0x6b8/0xab0 mm/page_ext.c:497
mm_core_init+0x12d/0x220 mm/mm_init.c:2666
Memory state around the buggy address:
ffff88807ef32380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807ef32400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807ef32480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88807ef32500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807ef32580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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