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BUG: KASAN: use-after-free in tls_write_space+0x238/0x2d0 net/tls/tls_main.c:222
Read of size 1 at addr ffff88809eafe470 by task syz-executor.4/11303
CPU: 0 PID: 11303 Comm: syz-executor.4 Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load1_noabort+0x68/0x70 mm/kasan/report.c:427
tls_write_space+0x238/0x2d0 net/tls/tls_main.c:222
tcp_new_space net/ipv4/tcp_input.c:5114 [inline]
tcp_check_space+0x395/0x640 net/ipv4/tcp_input.c:5125
tcp_data_snd_check net/ipv4/tcp_input.c:5135 [inline]
tcp_rcv_established+0x727/0x1810 net/ipv4/tcp_input.c:5583
tcp_v4_do_rcv+0x541/0x7d0 net/ipv4/tcp_ipv4.c:1476
sk_backlog_rcv include/net/sock.h:921 [inline]
__release_sock+0x12a/0x350 net/core/sock.c:2269
release_sock+0x54/0x1b0 net/core/sock.c:2805
tls_sk_proto_close+0x575/0x8b0 net/tls/tls_main.c:294
inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
__sock_release net/socket.c:602 [inline]
sock_release+0x87/0x1e0 net/socket.c:623
smc_release+0x1e4/0x5d0 net/smc/af_smc.c:141
__sock_release+0xcd/0x2b0 net/socket.c:602
sock_close+0x15/0x20 net/socket.c:1139
__fput+0x25f/0x7a0 fs/file_table.c:210
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4193eb
RSP: 002b:00007ffe852510a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193eb
RDX: 0000000000000000 RSI: 0000000009be9ba6 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2e623428
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000056c9e0
R13: 000000000056c9e0 R14: 000000000056bf60 R15: 000000000003741a
Allocated by task 11304:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618
kmalloc include/linux/slab.h:488 [inline]
kzalloc include/linux/slab.h:661 [inline]
tls_init+0xb1/0x4e0 net/tls/tls_main.c:518
tcp_set_ulp+0x18f/0x4c0 net/ipv4/tcp_ulp.c:127
do_tcp_setsockopt.constprop.0+0x1f6/0x1c10 net/ipv4/tcp.c:2547
tcp_setsockopt net/ipv4/tcp.c:2830 [inline]
tcp_setsockopt+0xa7/0xc0 net/ipv4/tcp.c:2822
SYSC_setsockopt net/socket.c:1865 [inline]
SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Freed by task 11303:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xc9/0x250 mm/slab.c:3815
tls_ctx_free net/tls/tls_main.c:252 [inline]
tls_ctx_free net/tls/tls_main.c:246 [inline]
tls_sk_proto_close+0x568/0x8b0 net/tls/tls_main.c:290
inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
__sock_release net/socket.c:602 [inline]
sock_release+0x87/0x1e0 net/socket.c:623
smc_release+0x1e4/0x5d0 net/smc/af_smc.c:141
__sock_release+0xcd/0x2b0 net/socket.c:602
sock_close+0x15/0x20 net/socket.c:1139
__fput+0x25f/0x7a0 fs/file_table.c:210
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x46/0xbb
The buggy address belongs to the object at ffff88809eafe400
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 112 bytes inside of
192-byte region [ffff88809eafe400, ffff88809eafe4c0)
The buggy address belongs to the page:
page:ffffea00027abf80 count:1 mapcount:0 mapping:ffff88809eafe000 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff88809eafe000 0000000000000000 0000000100000010
raw: ffffea00028de720 ffffea0002770fa0 ffff88813fe80040 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809eafe300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809eafe380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88809eafe400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809eafe480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88809eafe500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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