================================================================== BUG: KASAN: slab-out-of-bounds in __swab64p include/uapi/linux/swab.h:192 [inline] BUG: KASAN: slab-out-of-bounds in __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline] BUG: KASAN: slab-out-of-bounds in is_tx_ready include/net/tls.h:354 [inline] BUG: KASAN: slab-out-of-bounds in tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236 Read of size 8 at addr ffff8801d2d9f0b0 by task syz-executor4/10056 CPU: 0 PID: 10056 Comm: syz-executor4 Not tainted 4.19.0-rc4+ #228 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+0x1c4/0x2b4 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __swab64p include/uapi/linux/swab.h:192 [inline] __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline] is_tx_ready include/net/tls.h:354 [inline] tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236 tcp_new_space net/ipv4/tcp_input.c:5154 [inline] tcp_check_space+0x53f/0x920 net/ipv4/tcp_input.c:5165 tcp_data_snd_check net/ipv4/tcp_input.c:5175 [inline] tcp_rcv_established+0xde8/0x2120 net/ipv4/tcp_input.c:5656 tcp_v6_do_rcv+0x4b3/0x13c0 net/ipv6/tcp_ipv6.c:1326 sk_backlog_rcv include/net/sock.h:932 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 sk_stream_wait_memory+0x752/0x1290 net/core/stream.c:149 tls_sw_sendmsg+0x6bb/0x17a0 net/tls/tls_sw.c:846 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 __sys_sendto+0x3d7/0x670 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1ff41e4c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f1ff41e56d4 RCX: 0000000000457679 RDX: 000000000000c000 RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d5610 R14: 00000000004c3963 R15: 0000000000000004 Allocated by task 8738: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] alloc_skb_with_frags+0x133/0x7d0 net/core/skbuff.c:5268 sock_alloc_send_pskb+0x865/0xab0 net/core/sock.c:2082 sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2099 __ip6_append_data.isra.47+0x1fd9/0x3530 net/ipv6/ip6_output.c:1418 ip6_make_skb+0x380/0x5e0 net/ipv6/ip6_output.c:1774 udpv6_sendmsg+0x2d43/0x3710 net/ipv6/udp.c:1386 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x51d/0x930 net/socket.c:2116 __sys_sendmmsg+0x246/0x6d0 net/socket.c:2211 __do_sys_sendmmsg net/socket.c:2240 [inline] __se_sys_sendmmsg net/socket.c:2237 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2237 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8738: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3813 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] kfree_skb+0x1bb/0x580 net/core/skbuff.c:659 vti_xmit net/ipv4/ip_vti.c:232 [inline] vti_tunnel_xmit+0xc16/0x1730 net/ipv4/ip_vti.c:264 __netdev_start_xmit include/linux/netdevice.h:4319 [inline] netdev_start_xmit include/linux/netdevice.h:4328 [inline] xmit_one net/core/dev.c:3219 [inline] dev_hard_start_xmit+0x295/0xc90 net/core/dev.c:3235 __dev_queue_xmit+0x2f3b/0x3980 net/core/dev.c:3805 dev_queue_xmit+0x17/0x20 net/core/dev.c:3838 neigh_direct_output+0x15/0x20 net/core/neighbour.c:1407 neigh_output include/net/neighbour.h:483 [inline] ip6_finish_output2+0xc91/0x27a0 net/ipv6/ip6_output.c:120 ip6_finish_output+0x5fe/0xbc0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:276 [inline] ip6_output+0x23e/0xa00 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] ip6_local_out+0xc5/0x1b0 net/ipv6/output_core.c:176 ip6_send_skb+0xbc/0x340 net/ipv6/ip6_output.c:1695 udp_v6_send_skb.isra.25+0x86d/0x1540 net/ipv6/udp.c:1095 udpv6_sendmsg+0x2d92/0x3710 net/ipv6/udp.c:1392 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x51d/0x930 net/socket.c:2116 __sys_sendmmsg+0x246/0x6d0 net/socket.c:2211 __do_sys_sendmmsg net/socket.c:2240 [inline] __se_sys_sendmmsg net/socket.c:2237 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2237 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801d2d9f0c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 16 bytes to the left of 512-byte region [ffff8801d2d9f0c0, ffff8801d2d9f2c0) The buggy address belongs to the page: page:ffffea00074b67c0 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007639e88 ffffea0007639308 ffff8801da800940 raw: 0000000000000000 ffff8801d2d9f0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d2d9ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d2d9f000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d2d9f080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8801d2d9f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d2d9f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================