binder: BINDER_SET_CONTEXT_MGR already set
binder: 9586:9599 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 9586:9596 ioctl 40046207 0 returned -16
==================================================================
BUG: KASAN: use-after-free in l2tp_session_create+0x9aa/0xb80 net/l2tp/l2tp_core.c:1695
sctp: [Deprecated]: syz-executor4 (pid 9606) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
Read of size 4 at addr ffff8801ad16fb68 by task syz-executor7/9589
CPU: 1 PID: 9589 Comm: syz-executor7 Not tainted 4.16.0-rc6+ #274
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+0x194/0x24d lib/dump_stack.c:53
print_address_description+0x73/0x250 mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report+0x23c/0x360 mm/kasan/report.c:412
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
l2tp_session_create+0x9aa/0xb80 net/l2tp/l2tp_core.c:1695
pppol2tp_connect+0xede/0x1dd0 net/l2tp/l2tp_ppp.c:739
SYSC_connect+0x213/0x4a0 net/socket.c:1639
SyS_connect+0x24/0x30 net/socket.c:1620
do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f53c99
RSP: 002b:00000000f774f09c EFLAGS: 00000286 ORIG_RAX: 000000000000016a
RAX: ffffffffffffffda RBX: 0000000000000019 RCX: 0000000020e92000
RDX: 000000000000002e RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 9589:
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552
kmem_cache_alloc_trace+0x136/0x740 mm/slab.c:3607
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
l2tp_tunnel_create+0x5c6/0x1580 net/l2tp/l2tp_core.c:1507
pppol2tp_connect+0x14b8/0x1dd0 net/l2tp/l2tp_ppp.c:698
SYSC_connect+0x213/0x4a0 net/socket.c:1639
SyS_connect+0x24/0x30 net/socket.c:1620
do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
Freed by task 9596:
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
__kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527
__cache_free mm/slab.c:3485 [inline]
kfree+0xd9/0x260 mm/slab.c:3800
__rcu_reclaim kernel/rcu/rcu.h:167 [inline]
rcu_do_batch kernel/rcu/tree.c:2674 [inline]
invoke_rcu_callbacks kernel/rcu/tree.c:2933 [inline]
__rcu_process_callbacks kernel/rcu/tree.c:2900 [inline]
rcu_process_callbacks+0xe94/0x17f0 kernel/rcu/tree.c:2917
__do_softirq+0x2d7/0xb85 kernel/softirq.c:285
The buggy address belongs to the object at ffff8801ad16fa80
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 232 bytes inside of
512-byte region [ffff8801ad16fa80, ffff8801ad16fc80)
The buggy address belongs to the page:
page:ffffea0006b45bc0 count:1 mapcount:0 mapping:ffff8801ad16f080 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801ad16f080 0000000000000000 0000000100000006
raw: ffffea0006b461e0 ffffea0006b46ba0 ffff8801dac00940 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801ad16fa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8801ad16fa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801ad16fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8801ad16fb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801ad16fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================