==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:855
Read of size 1 at addr ffff8881e704cbd8 by task syz.7.895/3938
CPU: 0 PID: 3938 Comm: syz.7.895 Not tainted 5.4.290-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:855
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:987 [inline]
xfrm_policy_inexact_insert_node+0x923/0xb10 net/xfrm/xfrm_policy.c:1043
xfrm_policy_inexact_alloc_chain+0x4ec/0xaf0 net/xfrm/xfrm_policy.c:1159
xfrm_policy_inexact_insert+0x6a/0x1160 net/xfrm/xfrm_policy.c:1202
xfrm_policy_insert+0xe7/0x940 net/xfrm/xfrm_policy.c:1585
xfrm_add_policy+0x4f2/0x980 net/xfrm/xfrm_user.c:1720
xfrm_user_rcv_msg+0x689/0x9b0 net/xfrm/xfrm_user.c:2775
netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2467
xfrm_netlink_rcv+0x72/0x90 net/xfrm/xfrm_user.c:2797
netlink_unicast_kernel net/netlink/af_netlink.c:1306 [inline]
netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1332
netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2306
___sys_sendmsg net/socket.c:2360 [inline]
__sys_sendmsg+0x28b/0x380 net/socket.c:2406
__do_sys_sendmsg net/socket.c:2415 [inline]
__se_sys_sendmsg net/socket.c:2413 [inline]
__x64_sys_sendmsg+0x7f/0x90 net/socket.c:2413
do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f116a49d169
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:00007f1168b06038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f116a6c4fa0 RCX: 00007f116a49d169
RDX: 0000000000000000 RSI: 0000200000000580 RDI: 0000000000000006
RBP: 00007f116a51fa68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f116a6c4fa0 R15: 00007ffeb15ea688
Allocated by task 3938:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:543
__kmalloc+0x129/0x2e0 mm/slub.c:3913
kmalloc include/linux/slab.h:561 [inline]
sk_prot_alloc+0xc2/0x440 net/core/sock.c:1622
sk_alloc+0x39/0x310 net/core/sock.c:1680
pfkey_create+0x12c/0x650 net/key/af_key.c:154
__sock_create+0x3ce/0x790 net/socket.c:1427
sock_create net/socket.c:1478 [inline]
__sys_socket+0x132/0x370 net/socket.c:1520
__do_sys_socket net/socket.c:1529 [inline]
__se_sys_socket net/socket.c:1527 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1527
do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 164:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
kasan_slab_free+0xe/0x10 mm/kasan/common.c:496
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1494 [inline]
slab_free mm/slub.c:3080 [inline]
kfree+0x123/0x360 mm/slub.c:4071
skb_free_head net/core/skbuff.c:601 [inline]
skb_release_data+0x525/0x650 net/core/skbuff.c:621
skb_release_all net/core/skbuff.c:675 [inline]
__kfree_skb net/core/skbuff.c:689 [inline]
consume_skb+0xac/0x2a0 net/core/skbuff.c:849
skb_free_datagram+0x28/0xe0 net/core/datagram.c:329
netlink_recvmsg+0x5ef/0x11a0 net/netlink/af_netlink.c:1978
sock_recvmsg_nosec net/socket.c:891 [inline]
sock_recvmsg+0xf6/0x110 net/socket.c:909
____sys_recvmsg net/socket.c:2538 [inline]
___sys_recvmsg+0x6a7/0xa60 net/socket.c:2579
__sys_recvmsg net/socket.c:2626 [inline]
__do_sys_recvmsg net/socket.c:2636 [inline]
__se_sys_recvmsg net/socket.c:2633 [inline]
__x64_sys_recvmsg+0x1f4/0x2c0 net/socket.c:2633
do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
The buggy address belongs to the object at ffff8881e704c800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 984 bytes inside of
1024-byte region [ffff8881e704c800, ffff8881e704cc00)
The buggy address belongs to the page:
page:ffffea00079c1200 refcount:1 mapcount:0 mapping:ffff8881f5c02280 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 ffffea0007113400 0000000200000002 ffff8881f5c02280
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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x192/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
alloc_slab_page+0x3b/0x400 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x98/0x430 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2e0/0x460 mm/slub.c:2667
__slab_alloc+0x63/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
__kmalloc+0x175/0x2e0 mm/slub.c:3909
kmalloc_array include/linux/slab.h:618 [inline]
kcalloc include/linux/slab.h:629 [inline]
veth_alloc_queues drivers/net/veth.c:957 [inline]
veth_dev_init+0x1af/0x350 drivers/net/veth.c:984
register_netdevice+0x1c0/0x12a0 net/core/dev.c:9139
veth_newlink+0x835/0xb50 drivers/net/veth.c:1329
__rtnl_newlink net/core/rtnetlink.c:3255 [inline]
rtnl_newlink+0x1567/0x2060 net/core/rtnetlink.c:3314
rtnetlink_rcv_msg+0x983/0xc70 net/core/rtnetlink.c:5290
netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2467
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5308
netlink_unicast_kernel net/netlink/af_netlink.c:1306 [inline]
netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1332
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4955 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4961
__free_slab+0x21d/0x2d0 mm/slub.c:1774
free_slab mm/slub.c:1789 [inline]
discard_slab mm/slub.c:1795 [inline]
unfreeze_partials+0x162/0x190 mm/slub.c:2288
put_cpu_partial+0xbf/0x180 mm/slub.c:2324
__slab_free+0x2a5/0x370 mm/slub.c:2971
do_slab_free mm/slub.c:3068 [inline]
___cache_free+0xc1/0xd0 mm/slub.c:3087
qlink_free+0x23/0x30 mm/kasan/quarantine.c:148
qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:167
quarantine_reduce+0x1e4/0x230 mm/kasan/quarantine.c:260
__kasan_kmalloc+0x41/0x210 mm/kasan/common.c:507
kasan_slab_alloc+0xe/0x10 mm/kasan/common.c:537
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
__kmalloc_track_caller+0x10d/0x2c0 mm/slub.c:4449
kvasprintf+0xd6/0x180 lib/kasprintf.c:25
kvasprintf_const+0x5e/0x190 lib/kasprintf.c:49
kobject_set_name_vargs+0x61/0x120 lib/kobject.c:297
Memory state around the buggy address:
ffff8881e704ca80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881e704cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881e704cb80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
^
ffff8881e704cc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881e704cc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================