==================================================================
BUG: KASAN: use-after-free in tls_write_space+0x2b2/0x310 net/tls/tls_main.c:220
Read of size 1 at addr ffff8880935ccae0 by task syz-executor.0/9667
CPU: 0 PID: 9667 Comm: syz-executor.0 Not tainted 4.19.67 #41
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+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report mm/kasan/report.c:412 [inline]
kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396
__asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
tls_write_space+0x2b2/0x310 net/tls/tls_main.c:220
tcp_new_space net/ipv4/tcp_input.c:5155 [inline]
tcp_check_space+0x430/0x720 net/ipv4/tcp_input.c:5166
tcp_data_snd_check net/ipv4/tcp_input.c:5176 [inline]
tcp_rcv_established+0x9e9/0x1f10 net/ipv4/tcp_input.c:5667
tcp_v6_do_rcv+0x4b0/0x13c0 net/ipv6/tcp_ipv6.c:1326
sk_backlog_rcv include/net/sock.h:941 [inline]
__release_sock+0x129/0x390 net/core/sock.c:2334
release_sock+0x59/0x1c0 net/core/sock.c:2850
tls_sk_proto_close+0x691/0xa20 net/tls/tls_main.c:309
inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472
__sock_release+0xce/0x2a0 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1140
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413511
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 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:00007ffde0f92bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000413511
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: ffffffff8100a492 R09: 00000000f1ed4f14
R10: 00007ffde0f92cb0 R11: 0000000000000293 R12: 000000000075bfc8
R13: 0000000000037ecb R14: 00000000007610f0 R15: ffffffffffffffff
Allocated by task 9680:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc mm/kasan/kasan.c:553 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
kmem_cache_alloc_trace+0x152/0x760 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
kzalloc include/linux/slab.h:709 [inline]
create_ctx+0x46/0x1f0 net/tls/tls_main.c:550
tls_init+0x158/0x7a0 net/tls/tls_main.c:683
tcp_set_ulp+0x216/0x5f0 net/ipv4/tcp_ulp.c:155
do_tcp_setsockopt.isra.0+0x321/0x2390 net/ipv4/tcp.c:2754
tcp_setsockopt+0xbe/0xe0 net/ipv4/tcp.c:3068
sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3041
__sys_setsockopt+0x17a/0x280 net/socket.c:1901
__do_sys_setsockopt net/socket.c:1912 [inline]
__se_sys_setsockopt net/socket.c:1909 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 9667:
save_stack+0x45/0xd0 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:3503 [inline]
kfree+0xcf/0x220 mm/slab.c:3822
tls_ctx_free.part.0+0x32/0x40 net/tls/tls_main.c:251
tls_ctx_free net/tls/tls_main.c:246 [inline]
tls_sk_proto_close+0x684/0xa20 net/tls/tls_main.c:304
inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472
__sock_release+0xce/0x2a0 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1140
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880935cca00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 224 bytes inside of
512-byte region [ffff8880935cca00, ffff8880935ccc00)
The buggy address belongs to the page:
page:ffffea00024d7300 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffffea00024e5d08 ffffea00024d6b48 ffff88812c3f0940
raw: 0000000000000000 ffff8880935cc000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880935cc980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880935cca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880935cca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880935ccb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880935ccb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================