================================================================== BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x599/0x650 net/xfrm/xfrm_policy.c:855 Read of size 1 at addr ffff8881ee3edbd8 by task syz.0.264/1154 CPU: 0 PID: 1154 Comm: syz.0.264 Not tainted 5.4.289-syzkaller-00025-g49530c73f82d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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 xfrm_policy_inexact_list_reinsert+0x599/0x650 net/xfrm/xfrm_policy.c:855 xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:987 [inline] xfrm_policy_inexact_insert_node+0x8f3/0xb00 net/xfrm/xfrm_policy.c:1043 xfrm_policy_inexact_alloc_chain+0x4f9/0xb10 net/xfrm/xfrm_policy.c:1159 xfrm_policy_inexact_insert+0x69/0x10e0 net/xfrm/xfrm_policy.c:1202 xfrm_policy_insert+0xe1/0x8a0 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+0x6e/0x80 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+0xa18/0xcf0 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_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f8d4d84fda9 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:00007f8d4beba038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8d4da68fa0 RCX: 00007f8d4d84fda9 RDX: 0000000000004000 RSI: 0000000020000580 RDI: 0000000000000005 RBP: 00007f8d4d8d12a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8d4da68fa0 R15: 00007ffcca3dda98 Allocated by task 1154: 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 kmalloc include/linux/slab.h:561 [inline] sk_prot_alloc+0xbd/0x3e0 net/core/sock.c:1622 sk_alloc+0x35/0x2f0 net/core/sock.c:1680 pfkey_create+0x122/0x670 net/key/af_key.c:154 __sock_create+0x3cb/0x7a0 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+0x76/0x80 net/socket.c:1527 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Freed by task 359: 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 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+0x123/0x370 mm/slub.c:4071 skb_release_all net/core/skbuff.c:675 [inline] __kfree_skb net/core/skbuff.c:689 [inline] consume_skb+0xa5/0x2a0 net/core/skbuff.c:849 netlink_broadcast_filtered+0x115f/0x1280 net/netlink/af_netlink.c:1516 netlink_broadcast net/netlink/af_netlink.c:1538 [inline] nlmsg_multicast include/net/netlink.h:968 [inline] nlmsg_notify+0xf7/0x1b0 net/netlink/af_netlink.c:2510 fib_table_insert+0xb61/0x19b0 net/ipv4/fib_trie.c:1283 fib_magic net/ipv4/fib_frontend.c:1103 [inline] fib_add_ifaddr+0x10ae/0x1a40 net/ipv4/fib_frontend.c:1149 fib_netdev_event+0x1f0/0x550 net/ipv4/fib_frontend.c:1487 notifier_call_chain kernel/notifier.c:98 [inline] __raw_notifier_call_chain kernel/notifier.c:399 [inline] raw_notifier_call_chain+0x95/0x110 kernel/notifier.c:406 __dev_notify_flags+0x26e/0x510 net/core/dev.c:1670 dev_change_flags+0xe7/0x190 net/core/dev.c:8034 do_setlink+0xc4c/0x3b70 net/core/rtnetlink.c:2542 __rtnl_newlink net/core/rtnetlink.c:3188 [inline] rtnl_newlink+0x16bc/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 netlink_unicast_kernel net/netlink/af_netlink.c:1306 [inline] netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1332 netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:638 [inline] __sock_sendmsg net/socket.c:650 [inline] __sys_sendto+0x4f3/0x6c0 net/socket.c:1961 __do_sys_sendto net/socket.c:1973 [inline] __se_sys_sendto net/socket.c:1969 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:1969 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 The buggy address belongs to the object at ffff8881ee3ed800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 984 bytes inside of 1024-byte region [ffff8881ee3ed800, ffff8881ee3edc00) The buggy address belongs to the page: page:ffffea0007b8fa00 refcount:1 mapcount:0 mapping:ffff8881f5c02280 index:0x0 compound_mapcount: 0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 dead000000000100 dead000000000122 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x18f/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+0x39/0x3c0 mm/slub.c:343 allocate_slab mm/slub.c:1683 [inline] new_slab+0x97/0x440 mm/slub.c:1749 new_slab_objects mm/slub.c:2505 [inline] ___slab_alloc+0x2fe/0x490 mm/slub.c:2667 __slab_alloc+0x62/0xa0 mm/slub.c:2707 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2837 [inline] __kmalloc_track_caller+0x16d/0x2b0 mm/slub.c:4449 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xb4/0x4d0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1080 [inline] nlmsg_new include/net/netlink.h:888 [inline] rtmsg_fib+0x54c/0x970 net/ipv4/fib_semantics.c:518 fib_table_insert+0xb61/0x19b0 net/ipv4/fib_trie.c:1283 fib_magic net/ipv4/fib_frontend.c:1103 [inline] fib_add_ifaddr+0x42c/0x1a40 net/ipv4/fib_frontend.c:1125 fib_inetaddr_event+0x12b/0x2b0 net/ipv4/fib_frontend.c:1441 notifier_call_chain kernel/notifier.c:98 [inline] __blocking_notifier_call_chain kernel/notifier.c:322 [inline] blocking_notifier_call_chain+0xd5/0x160 kernel/notifier.c:333 __inet_insert_ifa+0x907/0xb50 net/ipv4/devinet.c:568 inet_insert_ifa net/ipv4/devinet.c:575 [inline] inetdev_event+0xbe1/0x1040 net/ipv4/devinet.c:1584 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+0x221/0x2e0 mm/slub.c:1774 free_slab mm/slub.c:1789 [inline] discard_slab mm/slub.c:1795 [inline] unfreeze_partials+0x14e/0x180 mm/slub.c:2288 put_cpu_partial+0x44/0x180 mm/slub.c:2324 __slab_free+0x297/0x360 mm/slub.c:2971 qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167 quarantine_reduce+0x1d9/0x210 mm/kasan/quarantine.c:260 __kasan_kmalloc+0x41/0x210 mm/kasan/common.c:507 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2829 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc_trace+0xdc/0x260 mm/slub.c:2854 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] selinux_sk_alloc_security+0x71/0x190 security/selinux/hooks.c:5247 security_sk_alloc+0x6d/0xa0 security/security.c:2108 sk_prot_alloc+0x14c/0x3e0 net/core/sock.c:1625 sk_alloc+0x35/0x2f0 net/core/sock.c:1680 unix_create1+0x8e/0x590 net/unix/af_unix.c:789 unix_create+0x12c/0x1b0 net/unix/af_unix.c:850 Memory state around the buggy address: ffff8881ee3eda80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881ee3edb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881ee3edb80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff8881ee3edc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ee3edc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================