EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. EXT4-fs (loop4): Online resizing not supported with bigalloc ================================================================== BUG: KASAN: slab-out-of-bounds in sg_mark_end include/linux/scatterlist.h:190 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255 Read of size 8 at addr ffff888079924ab8 by task syz-executor.3/10610 CPU: 1 PID: 10610 Comm: syz-executor.3 Not tainted 4.14.262-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 sg_mark_end include/linux/scatterlist.h:190 [inline] tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255 tls_handle_open_record net/tls/tls_main.c:158 [inline] tls_sk_proto_close+0x6f0/0x8b0 net/tls/tls_main.c:270 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:450 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f1eb3d01afb RSP: 002b:00007fff431c8fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1eb3d01afb RDX: 0000000000000000 RSI: 00007f1eb3cc6000 RDI: 0000000000000003 RBP: 00007f1eb3e63960 R08: 0000000000000000 R09: 00000000e0f0a99d R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001c0a3 R13: 00007fff431c90d0 R14: 00007fff431c90f0 R15: 0000000000000032 Allocated by task 7967: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 alloc_skb_fclone include/linux/skbuff.h:1022 [inline] sk_stream_alloc_skb+0xb1/0x760 net/ipv4/tcp.c:855 tcp_sendmsg_locked+0xed8/0x2ef0 net/ipv4/tcp.c:1301 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 sock_write_iter+0x22c/0x370 net/socket.c:925 call_write_iter include/linux/fs.h:1780 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 7967: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 ------------[ cut here ]------------ __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x5f6/0x820 net/core/skbuff.c:583 kernel BUG at include/linux/scatterlist.h:190! skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb+0x46/0x60 net/core/skbuff.c:654 sk_wmem_free_skb include/net/sock.h:1427 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3187 [inline] tcp_ack+0x187b/0x4580 net/ipv4/tcp_input.c:3687 tcp_rcv_established+0xebb/0x1810 net/ipv4/tcp_input.c:5501 tcp_v4_do_rcv+0x541/0x7d0 net/ipv4/tcp_ipv4.c:1476 sk_backlog_rcv include/net/sock.h:923 [inline] __release_sock+0x12a/0x350 net/core/sock.c:2287 release_sock+0x54/0x1b0 net/core/sock.c:2825 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1458 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 sock_write_iter+0x22c/0x370 net/socket.c:925 call_write_iter include/linux/fs.h:1780 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff888079924240 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 120 bytes to the right of 2048-byte region [ffff888079924240, ffff888079924a40) The buggy address belongs to the page: page:ffffea0001e64900 count:1 mapcount:0 mapping:ffff888079924240 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffff888079924240 0000000000000000 0000000100000003 invalid opcode: 0000 [#1] PREEMPT SMP KASAN raw: ffffea000285eca0 ffffea0001e66420 ffff88813fe74c40 0000000000000000 Modules linked in: page dumped because: kasan: bad access detected CPU: 0 PID: 10598 Comm: syz-executor.0 Not tainted 4.14.262-syzkaller #0 Memory state around the buggy address: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff888079924980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb task: ffff88809e8ac4c0 task.stack: ffff8880b3a90000 ffff888079924a00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc RIP: 0010:sg_mark_end include/linux/scatterlist.h:190 [inline] RIP: 0010:tls_push_record+0xd41/0x1270 net/tls/tls_sw.c:255 >ffff888079924a80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 RSP: 0018:ffff8880b3a97c28 EFLAGS: 00010297 ^ ffff888079924b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888079924b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RAX: ffff88809e8ac4c0 RBX: ffff8880a9a15600 RCX: 0000000000000000 ================================================================== RDX: 0000000000000000 RSI: ffff8880a51a1120 RDI: ffff8880a51a10f8 RBP: ffff8880a3502000 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88809e8ac4c0 R12: ffff88809af3ec80 R13: 0000000000000017 R14: ffff8880a51a1100 R15: ffff8880a51a10f8 FS: 0000555555ab5400(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033