RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 00000000006cb018 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000040 R11: 0000000000000212 R12: 0000000000000004 R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 ================================================================== BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:369 [inline] BUG: KASAN: use-after-free in tls_push_record+0x10a9/0x1400 net/tls/tls_sw.c:214 Write of size 1 at addr ffff8801b4df0000 by task syz-executor732/4419 CPU: 1 PID: 4419 Comm: syz-executor732 Not tainted 4.18.0+ #209 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:369 [inline] tls_push_record+0x10a9/0x1400 net/tls/tls_sw.c:214 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:251 tls_handle_open_record net/tls/tls_main.c:156 [inline] tls_sk_proto_close+0x759/0xb90 net/tls/tls_main.c:256 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:457 __sock_release+0xd7/0x250 net/socket.c:579 sock_close+0x19/0x20 net/socket.c:1139 __fput+0x36e/0x8c0 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ae4/0x26e0 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 __do_sys_exit_group kernel/exit.c:981 [inline] __se_sys_exit_group kernel/exit.c:979 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x43f1f8 Code: Bad RIP value. RSP: 002b:00007fff0999e8d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f1f8 RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00000000004bef68 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0006d37c00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 ffffea0006b44a08 ffffea0006d55208 0000000000000000 raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b4deff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8801b4deff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8801b4df0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8801b4df0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8801b4df0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================