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BUG: KASAN: use-after-free in tls_write_space+0x150/0x170 net/tls/tls_main.c:239
Read of size 1 at addr ffff888094ae2878 by task syz-executor.2/21582
CPU: 1 PID: 21582 Comm: syz-executor.2 Not tainted 5.2.0-rc6+ #68
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:188
__kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
kasan_report+0x12/0x20 mm/kasan/common.c:614
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
tls_write_space+0x150/0x170 net/tls/tls_main.c:239
tcp_new_space net/ipv4/tcp_input.c:5147 [inline]
tcp_check_space+0x430/0x720 net/ipv4/tcp_input.c:5158
tcp_data_snd_check net/ipv4/tcp_input.c:5168 [inline]
tcp_rcv_established+0x98f/0x1fa0 net/ipv4/tcp_input.c:5659
tcp_v6_do_rcv+0x41e/0x12c0 net/ipv6/tcp_ipv6.c:1334
sk_backlog_rcv include/net/sock.h:945 [inline]
__release_sock+0x129/0x390 net/core/sock.c:2414
release_sock+0x59/0x1c0 net/core/sock.c:2930
tls_sk_proto_close+0x281/0x6d0 net/tls/tls_main.c:313
inet_release+0xe0/0x1f0 net/ipv4/af_inet.c:427
inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470
__sock_release+0xce/0x2a0 net/socket.c:601
sock_close+0x1b/0x30 net/socket.c:1273
__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:185 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413201
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:00007ffd5a0537c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413201
RDX: 0000001b2c720000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffffffff8128601c R09: 0000000082fb78ca
R10: 00007ffd5a0538a0 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 000000000006963f R15: ffffffffffffffff
Allocated by task 21591:
save_stack+0x23/0x90 mm/kasan/common.c:71
set_track mm/kasan/common.c:79 [inline]
__kasan_kmalloc mm/kasan/common.c:489 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503
kmem_cache_alloc_trace+0x151/0x750 mm/slab.c:3555
kmalloc include/linux/slab.h:547 [inline]
kzalloc include/linux/slab.h:742 [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+0x321/0x2310 net/ipv4/tcp.c:2789
tcp_setsockopt+0xbe/0xe0 net/ipv4/tcp.c:3103
sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3126
__sys_setsockopt+0x17a/0x280 net/socket.c:2072
__do_sys_setsockopt net/socket.c:2083 [inline]
__se_sys_setsockopt net/socket.c:2080 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:2080
do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 21582:
save_stack+0x23/0x90 mm/kasan/common.c:71
set_track mm/kasan/common.c:79 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:451
kasan_slab_free+0xe/0x10 mm/kasan/common.c:459
__cache_free mm/slab.c:3432 [inline]
kfree+0xcf/0x220 mm/slab.c:3755
tls_ctx_free.part.0+0x34/0x40 net/tls/tls_main.c:261
tls_ctx_free net/tls/tls_main.c:256 [inline]
tls_sk_proto_close+0x274/0x6d0 net/tls/tls_main.c:308
inet_release+0xe0/0x1f0 net/ipv4/af_inet.c:427
inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470
__sock_release+0xce/0x2a0 net/socket.c:601
sock_close+0x1b/0x30 net/socket.c:1273
__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:185 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888094ae2780
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 248 bytes inside of
512-byte region [ffff888094ae2780, ffff888094ae2980)
The buggy address belongs to the page:
page:ffffea000252b880 refcount:1 mapcount:0 mapping:ffff8880aa400940 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00025172c8 ffffea0001a1cb08 ffff8880aa400940
raw: 0000000000000000 ffff888094ae2000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888094ae2700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888094ae2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888094ae2800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888094ae2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888094ae2900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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