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BUG: KASAN: use-after-free in tls_write_space+0x14b/0x170 /net/tls/tls_main.c:239
Read of size 1 at addr ffff8880916f956a by task syz-executor.3/3685
CPU: 0 PID: 3685 Comm: syz-executor.3 Not tainted 5.2.0+ #96
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+0xd4/0x306 /mm/kasan/report.c:351
__kasan_report.cold+0x1b/0x36 /mm/kasan/report.c:482
kasan_report+0x12/0x17 /mm/kasan/common.c:612
__asan_report_load1_noabort+0x14/0x20 /mm/kasan/generic_report.c:129
tls_write_space+0x14b/0x170 /net/tls/tls_main.c:239
tcp_new_space /net/ipv4/tcp_input.c:5151 [inline]
tcp_check_space+0x191/0x760 /net/ipv4/tcp_input.c:5162
tcp_data_snd_check /net/ipv4/tcp_input.c:5172 [inline]
tcp_rcv_established+0x9c1/0x1e70 /net/ipv4/tcp_input.c:5663
tcp_v6_do_rcv+0x41e/0x12c0 /net/ipv6/tcp_ipv6.c:1356
sk_backlog_rcv /./include/net/sock.h:945 [inline]
__release_sock+0x129/0x390 /net/core/sock.c:2418
release_sock+0x59/0x1c0 /net/core/sock.c:2934
tls_sk_proto_close+0x282/0x6b0 /net/tls/tls_main.c:313
inet_release+0xed/0x200 /net/ipv4/af_inet.c:427
inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:470
__sock_release+0xce/0x280 /net/socket.c:590
sock_close+0x1e/0x30 /net/socket.c:1268
__fput+0x2ff/0x890 /fs/file_table.c:280
____fput+0x16/0x20 /fs/file_table.c:313
task_work_run+0x145/0x1c0 /kernel/task_work.c:113
tracehook_notify_resume /./include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x316/0x380 /arch/x86/entry/common.c:163
prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413501
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:00007ffe2d854480 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413501
RDX: 0000001b2f120000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 000000003402ac2b R09: 000000003402ac2f
R10: 00007ffe2d854560 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 0000000000761da8 R15: ffffffffffffffff
Allocated by task 3686:
save_stack+0x23/0x90 /mm/kasan/common.c:69
set_track /mm/kasan/common.c:77 [inline]
__kasan_kmalloc /mm/kasan/common.c:487 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 /mm/kasan/common.c:460
kasan_kmalloc+0x9/0x10 /mm/kasan/common.c:501
kmem_cache_alloc_trace+0x158/0x790 /mm/slab.c:3550
kmalloc /./include/linux/slab.h:552 [inline]
kzalloc /./include/linux/slab.h:748 [inline]
create_ctx+0x46/0x1f0 /net/tls/tls_main.c:602
tls_init /net/tls/tls_main.c:788 [inline]
tls_init+0x11d/0x510 /net/tls/tls_main.c:770
__tcp_set_ulp /net/ipv4/tcp_ulp.c:126 [inline]
tcp_set_ulp+0x330/0x640 /net/ipv4/tcp_ulp.c:147
do_tcp_setsockopt.isra.0+0x363/0x24f0 /net/ipv4/tcp.c:2808
tcp_setsockopt+0xbe/0xe0 /net/ipv4/tcp.c:3135
sock_common_setsockopt+0x94/0xd0 /net/core/sock.c:3130
__sys_setsockopt+0x261/0x4c0 /net/socket.c:2084
__do_sys_setsockopt /net/socket.c:2100 [inline]
__se_sys_setsockopt /net/socket.c:2097 [inline]
__x64_sys_setsockopt+0xbe/0x150 /net/socket.c:2097
do_syscall_64+0xfd/0x6a0 /arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 3685:
save_stack+0x23/0x90 /mm/kasan/common.c:69
set_track /mm/kasan/common.c:77 [inline]
__kasan_slab_free+0x102/0x150 /mm/kasan/common.c:449
kasan_slab_free+0xe/0x10 /mm/kasan/common.c:457
__cache_free /mm/slab.c:3425 [inline]
kfree+0x10a/0x2c0 /mm/slab.c:3756
tls_ctx_free.part.0+0x3a/0x40 /net/tls/tls_main.c:261
tls_ctx_free /net/tls/tls_main.c:256 [inline]
tls_sk_proto_close+0x275/0x6b0 /net/tls/tls_main.c:308
inet_release+0xed/0x200 /net/ipv4/af_inet.c:427
inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:470
__sock_release+0xce/0x280 /net/socket.c:590
sock_close+0x1e/0x30 /net/socket.c:1268
__fput+0x2ff/0x890 /fs/file_table.c:280
____fput+0x16/0x20 /fs/file_table.c:313
task_work_run+0x145/0x1c0 /kernel/task_work.c:113
tracehook_notify_resume /./include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x316/0x380 /arch/x86/entry/common.c:163
prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880916f9500
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 106 bytes inside of
512-byte region [ffff8880916f9500, ffff8880916f9700)
The buggy address belongs to the page:
page:ffffea000245be40 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0xffff8880916f9000
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea000208cd88 ffffea0001aeffc8 ffff8880aa400a80
raw: ffff8880916f9000 ffff8880916f9000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880916f9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880916f9480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880916f9500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880916f9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880916f9600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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