================================================================== 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 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. Read of size 8 at addr ffff8880a94208f8 by task syz-executor.0/21257 CPU: 0 PID: 21257 Comm: syz-executor.0 Not tainted 4.14.232-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: 0033:0x4665f9 RSP: 002b:00007f1941145188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: 00000000001b0000 RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe034afe0f R14: 00007f1941145300 R15: 0000000000022000 Allocated by task 20925: 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 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] vc_allocate+0x143/0x640 drivers/tty/vt/vt.c:793 con_install+0x4d/0x450 drivers/tty/vt/vt.c:2899 tty_driver_install_tty drivers/tty/tty_io.c:1225 [inline] tty_init_dev.part.0+0x99/0x400 drivers/tty/tty_io.c:1338 tty_init_dev drivers/tty/tty_io.c:1328 [inline] tty_open_by_driver drivers/tty/tty_io.c:1973 [inline] tty_open+0x669/0x8b0 drivers/tty/tty_io.c:2021 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 19717: 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 __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 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] consume_skb+0xe0/0x380 net/core/skbuff.c:714 netlink_broadcast_filtered+0x2ab/0x9e0 net/netlink/af_netlink.c:1489 netlink_broadcast net/netlink/af_netlink.c:1511 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0x126/0x170 net/netlink/af_netlink.c:2476 rtnl_notify net/core/rtnetlink.c:653 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:2931 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:2945 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:2934 [inline] rtmsg_ifinfo+0xd4/0x100 net/core/rtnetlink.c:2951 __dev_notify_flags+0x1d3/0x260 net/core/dev.c:6828 dev_change_flags+0xe6/0x130 net/core/dev.c:6865 do_setlink+0x83f/0x2bf0 net/core/rtnetlink.c:2092 rtnl_group_changelink net/core/rtnetlink.c:2512 [inline] rtnl_newlink+0xccc/0x1860 net/core/rtnetlink.c:2666 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 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 ffff8880a9420080 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 120 bytes to the right of 2048-byte region [ffff8880a9420080, ffff8880a9420880) The buggy address belongs to the page: page:ffffea0002a50800 count:1 mapcount:0 mapping:ffff8880a9420080 index:0xffff8880a9421180 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffff8880a9420080 ffff8880a9421180 0000000100000002 raw: ffffea000273e120 ffffea00010eb520 ffff88813fe80c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a9420780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a9420800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a9420880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a9420900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a9420980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================