netlink: 'syz-executor.2': attribute type 5 has an invalid length. ================================================================== BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:379 [inline] BUG: KASAN: use-after-free in tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220 Write of size 1 at addr ffff888094b58000 by task syz-executor.5/21847 CPU: 1 PID: 21847 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_store1_noabort+0x88/0x90 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:379 [inline] tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220 tls_handle_open_record net/tls/tls_main.c:156 [inline] tls_sk_proto_close+0x8cf/0xc20 net/tls/tls_main.c:271 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:472 __sock_release+0xcd/0x2a0 net/socket.c:599 sock_close+0x15/0x20 net/socket.c:1214 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fbd07e57c2b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffd676bebc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fbd07e57c2b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fbd07fb9960 R08: 0000000000000000 R09: 00007fbd07fbd9f0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000054526 R13: 00007ffd676becc0 R14: 00007fbd07fb81d0 R15: 0000000000000032 Allocated by task 21876: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] macvlan_port_create drivers/net/macvlan.c:1170 [inline] macvlan_common_newlink+0x3dd/0x1590 drivers/net/macvlan.c:1402 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff888094b58bc0 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 3008 bytes to the left of 8192-byte region [ffff888094b58bc0, ffff888094b5abc0) The buggy address belongs to the page: page:ffffea000252d600 count:1 mapcount:0 mapping:ffff88813bff2080 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0001407308 ffff88813bff1b48 ffff88813bff2080 raw: 0000000000000000 ffff888094b58bc0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888094b57f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888094b57f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888094b58000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888094b58080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888094b58100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================