==================================================================
BUG: KASAN: slab-out-of-bounds in __xfrm_state_lookup.isra.0+0x809/0x870 net/xfrm/xfrm_state.c:961
Read of size 8 at addr ffff88801f6f73b8 by task syz-executor.2/31638
CPU: 1 PID: 31638 Comm: syz-executor.2 Not tainted 5.15.0-rc7-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+0x6c/0x309 mm/kasan/report.c:256
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
__xfrm_state_lookup.isra.0+0x809/0x870 net/xfrm/xfrm_state.c:961
xfrm_state_find+0x1cac/0x4f00 net/xfrm/xfrm_state.c:1128
xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2391 [inline]
xfrm_tmpl_resolve+0x2f3/0xd40 net/xfrm/xfrm_policy.c:2436
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+0xc6a/0x3a20 net/ipv6/raw.c:928
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x331/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmmsg+0x297/0x470 net/socket.c:2542
__compat_sys_sendmmsg net/compat.c:361 [inline]
__do_compat_sys_sendmmsg net/compat.c:368 [inline]
__se_compat_sys_sendmmsg net/compat.c:365 [inline]
__ia32_compat_sys_sendmmsg+0x9b/0x100 net/compat.c:365
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ed8549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f44d25fc EFLAGS: 00000296 ORIG_RAX: 0000000000000159
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000480
RDX: 00000000000002e9 RSI: 00000000000001f4 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 14967:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
xfrm_hash_alloc+0xcb/0xf0 net/xfrm/xfrm_hash.c:21
xfrm_hash_resize+0x99/0x1880 net/xfrm/xfrm_state.c:145
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348
kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3552
__hw_addr_flush+0x152/0x240 net/core/dev_addr_lists.c:484
dev_addr_flush+0x15/0x50 net/core/dev_addr_lists.c:513
free_netdev+0x1f7/0x5b0 net/core/dev.c:10912
netdev_run_todo+0x882/0xa80 net/core/dev.c:10595
ip6_tnl_exit_batch_net+0x5fa/0x890 net/ipv6/ip6_tunnel.c:2312
ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:591
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Second to last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348
kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3552
__hw_addr_del_entry+0x313/0x410 net/core/dev_addr_lists.c:145
__hw_addr_del_ex net/core/dev_addr_lists.c:194 [inline]
__dev_mc_del net/core/dev_addr_lists.c:873 [inline]
dev_mc_del+0xd4/0x130 net/core/dev_addr_lists.c:891
igmp6_group_dropped+0x31e/0xeb0 net/ipv6/mcast.c:715
ipv6_mc_down+0xc0/0x4c0 net/ipv6/mcast.c:2725
ipv6_mc_destroy_dev+0x25/0x620 net/ipv6/mcast.c:2794
addrconf_ifdown.isra.0+0xf38/0x1630 net/ipv6/addrconf.c:3855
addrconf_notify+0xeb/0x1bb0 net/ipv6/addrconf.c:3646
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1996
call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
call_netdevice_notifiers net/core/dev.c:2022 [inline]
unregister_netdevice_many+0x951/0x1790 net/core/dev.c:11043
ip_tunnel_delete_nets+0x39f/0x5b0 net/ipv4/ip_tunnel.c:1123
ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
setup_net+0x639/0xa30 net/core/net_namespace.c:349
copy_net_ns+0x319/0x760 net/core/net_namespace.c:470
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:3077
__do_sys_unshare kernel/fork.c:3151 [inline]
__se_sys_unshare kernel/fork.c:3149 [inline]
__ia32_sys_unshare+0x2c/0x40 kernel/fork.c:3149
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
The buggy address belongs to the object at ffff88801f6f7300
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 56 bytes to the right of
128-byte region [ffff88801f6f7300, ffff88801f6f7380)
The buggy address belongs to the page:
page:ffffea00007dbdc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f6f7
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001dbef00 0000000500000005 ffff888010c418c0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 2959, ts 18909900987, free_ts 18908517801
prep_new_page mm/page_alloc.c:2424 [inline]
get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4153
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5375
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
alloc_slab_page mm/slub.c:1770 [inline]
allocate_slab mm/slub.c:1907 [inline]
new_slab+0x319/0x490 mm/slub.c:1970
___slab_alloc+0x950/0x1050 mm/slub.c:3001
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3088
slab_alloc_node mm/slub.c:3179 [inline]
slab_alloc mm/slub.c:3221 [inline]
kmem_cache_alloc_trace+0x302/0x3c0 mm/slub.c:3238
kmalloc include/linux/slab.h:591 [inline]
kernfs_get_open_node fs/kernfs/file.c:552 [inline]
kernfs_fop_open+0x957/0xd40 fs/kernfs/file.c:698
do_dentry_open+0x4c8/0x11d0 fs/open.c:822
do_open fs/namei.c:3428 [inline]
path_openat+0x1c9a/0x2740 fs/namei.c:3561
do_filp_open+0x1aa/0x400 fs/namei.c:3588
do_sys_openat2+0x16d/0x4d0 fs/open.c:1200
do_sys_open fs/open.c:1216 [inline]
__do_sys_open fs/open.c:1224 [inline]
__se_sys_open fs/open.c:1220 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1220
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:1338 [inline]
free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389
free_unref_page_prepare mm/page_alloc.c:3315 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3394
__unfreeze_partials+0x340/0x360 mm/slub.c:2502
qlink_free mm/kasan/quarantine.c:146 [inline]
qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
__kasan_slab_alloc+0x95/0xb0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3213 [inline]
slab_alloc mm/slub.c:3221 [inline]
kmem_cache_alloc+0x209/0x390 mm/slub.c:3226
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags+0x9a/0xe0 include/linux/audit.h:319
user_path_at_empty+0x2b/0x60 fs/namei.c:2800
do_readlinkat+0xcd/0x2f0 fs/stat.c:443
__do_sys_readlinkat fs/stat.c:470 [inline]
__se_sys_readlinkat fs/stat.c:467 [inline]
__x64_sys_readlinkat+0x93/0xf0 fs/stat.c:467
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:
ffff88801f6f7280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88801f6f7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801f6f7380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88801f6f7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801f6f7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi
4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d
a: 10 06 adc %al,(%rsi)
c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
10: 10 07 adc %al,(%rdi)
12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
16: 10 08 adc %cl,(%rax)
18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1c: 00 00 add %al,(%rax)
1e: 00 00 add %al,(%rax)
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
* 2a: 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 retq
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi