RBP: 00000000200000c0 R08: 00007f95b609ab20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
IPVS: set_ctl: invalid protocol: 127 255.255.255.247:20001 lblc
==================================================================
BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x652/0x980 include/trace/events/lock.h:13
Read of size 8 at addr ffff8801c8c042e0 by task syz-executor7/13847

CPU: 0 PID: 13847 Comm: syz-executor7 Not tainted 4.17.0-rc4+ #43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
IPVS: set_ctl: invalid protocol: 127 255.255.255.247:20001 lblc
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 perf_trace_lock_acquire+0x652/0x980 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x38e/0x520 kernel/locking/lockdep.c:3919
 down_write+0x87/0x120 kernel/locking/rwsem.c:70
 fuse_kill_sb_blk+0x50/0xb0 fs/fuse/inode.c:1230
 deactivate_locked_super+0x97/0x100 fs/super.c:316
 mount_bdev+0x37d/0x3e0 fs/super.c:1166
 fuse_mount_blk+0x34/0x40 fs/fuse/inode.c:1222
 mount_fs+0xae/0x328 fs/super.c:1267
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2848
 ksys_mount+0x12d/0x140 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455979
RSP: 002b:00007f95b609ab08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 0000000000455979
RDX: 00000000004ba2e5 RSI: 0000000020000080 RDI: 00000000200000c0
RBP: 00000000200000c0 R08: 00007f95b609ab20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 13847:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620
 kmalloc include/linux/slab.h:512 [inline]
 fuse_fill_super+0xc92/0x1e20 fs/fuse/inode.c:1096
 mount_bdev+0x30c/0x3e0 fs/super.c:1164
 fuse_mount_blk+0x34/0x40 fs/fuse/inode.c:1222
 mount_fs+0xae/0x328 fs/super.c:1267
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2848
 ksys_mount+0x12d/0x140 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 13797:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 __rcu_reclaim kernel/rcu/rcu.h:173 [inline]
 rcu_do_batch kernel/rcu/tree.c:2675 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2930 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2897 [inline]
 rcu_process_callbacks+0xa69/0x15f0 kernel/rcu/tree.c:2914
 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:285

The buggy address belongs to the object at ffff8801c8c04000
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 736 bytes inside of
 1024-byte region [ffff8801c8c04000, ffff8801c8c04400)
The buggy address belongs to the page:
page:ffffea0007230100 count:1 mapcount:0 mapping:ffff8801c8c04000 index:0xffff8801c8c05200 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801c8c04000 ffff8801c8c05200 0000000100000005
raw: ffffea0006cd31a0 ffffea00071eb1a0 ffff8801da800ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c8c04180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c8c04200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801c8c04280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff8801c8c04300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c8c04380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================