RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000004 RBP: 00000000009300a0 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d3db8 R14: 00000000004c89a5 R15: 0000000000000002 ================================================================== BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:339 [inline] BUG: KASAN: use-after-free in tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 Write of size 1 at addr ffff88019a0d0000 by task syz-executor3/13318 CPU: 1 PID: 13318 Comm: syz-executor3 Not tainted 4.18.0+ #189 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+0x242/0x2fe mm/kasan/report.c:412 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:339 [inline] tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:276 tls_handle_open_record net/tls/tls_main.c:164 [inline] tls_sk_proto_close+0x74c/0xae0 net/tls/tls_main.c:264 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459 __sock_release+0xd7/0x260 net/socket.c:581 sock_close+0x19/0x20 net/socket.c:1132 __fput+0x39b/0x860 fs/file_table.c:251 ____fput+0x15/0x20 fs/file_table.c:282 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 RIP: 0033:0x410c41 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fff73a99820 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410c41 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 00007fff73a99750 R11: 0000000000000293 R12: 000000000000000c R13: 000000000020476b R14: 0000000000000dd8 R15: badc0ffeebadface The buggy address belongs to the page: page:ffffea0006683400 count:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 ffffea0006b74808 ffffea0006b51208 0000000000000000 raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88019a0cff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88019a0cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88019a0d0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88019a0d0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88019a0d0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================