SELinux: unrecognized netlink message: protocol=6 nlmsg_type=8192 sclass=netlink_xfrm_socket pid=814 comm=syz.2.177 ================================================================== 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 ffff8881ded56bd8 by task syz.2.177/814 CPU: 0 PID: 814 Comm: syz.2.177 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: 0033:0x7f336decb169 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:00007f336c534038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f336e0f2fa0 RCX: 00007f336decb169 RDX: 0000000000000000 RSI: 0000200000000580 RDI: 0000000000000007 RBP: 00007f336df4da68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f336e0f2fa0 R15: 00007ffcd3fbed18 Allocated by task 814: 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 202: 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 unix_dgram_recvmsg+0xbeb/0x1120 net/unix/af_unix.c:2200 sock_recvmsg_nosec net/socket.c:891 [inline] sock_recvmsg net/socket.c:909 [inline] sock_read_iter+0x34e/0x430 net/socket.c:987 call_read_iter include/linux/fs.h:1985 [inline] new_sync_read fs/read_write.c:414 [inline] __vfs_read+0x5cd/0x730 fs/read_write.c:427 vfs_read+0x14c/0x370 fs/read_write.c:461 ksys_read+0x199/0x2c0 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:595 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 ffff8881ded56800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 984 bytes inside of 1024-byte region [ffff8881ded56800, ffff8881ded56c00) The buggy address belongs to the page: page:ffffea00077b5400 refcount:1 mapcount:0 mapping:ffff8881f5c02280 index:0x0 compound_mapcount: 0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 ffffea00077b4e00 0000000600000006 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+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_track_caller+0x17f/0x2c0 mm/slub.c:4449 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xbc/0x4f0 net/core/skbuff.c:210 alloc_skb_fclone include/linux/skbuff.h:1130 [inline] sk_stream_alloc_skb+0x1f5/0xa80 net/ipv4/tcp.c:891 tcp_sendmsg_locked+0xe07/0x3810 net/ipv4/tcp.c:1300 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1450 inet_sendmsg+0xa1/0xc0 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:638 [inline] __sock_sendmsg net/socket.c:650 [inline] sock_write_iter+0x344/0x470 net/socket.c:1009 call_write_iter include/linux/fs.h:1991 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5d3/0x750 fs/read_write.c:496 vfs_write+0x1f2/0x4e0 fs/read_write.c:558 page_owner free stack trace missing Memory state around the buggy address: ffff8881ded56a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881ded56b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881ded56b80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff8881ded56c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ded56c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================