TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: use-after-free in __swab64p include/uapi/linux/swab.h:192 [inline] BUG: KASAN: use-after-free in __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline] BUG: KASAN: use-after-free in is_tx_ready include/net/tls.h:354 [inline] BUG: KASAN: use-after-free in tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236 Read of size 8 at addr ffff8801bf24e670 by task syz-executor095/7819 CPU: 0 PID: 7819 Comm: syz-executor095 Not tainted 4.19.0-rc4+ #227 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: 0033:0x441109 Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe807e6ff8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441109 RDX: 000000000000c000 RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000217 R12: 000000000000e8e0 R13: 0000000000402030 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 3226: 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 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] kernfs_fop_open+0x358/0xf90 fs/kernfs/file.c:648 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 3226: 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 kernfs_fop_release+0x12b/0x1a0 fs/kernfs/file.c:783 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801bf24e580 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 240 bytes inside of 512-byte region [ffff8801bf24e580, ffff8801bf24e780) The buggy address belongs to the page: page:ffffea0006fc9380 count:1 mapcount:0 mapping:ffff8801da800940 index:0xffff8801bf24e580 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00070e3a08 ffffea00070e3a88 ffff8801da800940 raw: ffff8801bf24e580 ffff8801bf24e080 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801bf24e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801bf24e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801bf24e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801bf24e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801bf24e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================