IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: slab-out-of-bounds in strlen+0x91/0xa0 lib/string.c:482
Read of size 1 at addr ffff8801ac7eb680 by task syz-executor0/4520

CPU: 0 PID: 4520 Comm: syz-executor0 Not tainted 4.16.0+ #1
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+0x1b9/0x29f lib/dump_stack.c:53
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 strlen+0x91/0xa0 lib/string.c:482
 strlen include/linux/string.h:267 [inline]
 getname_kernel+0x24/0x370 fs/namei.c:216
 kern_path+0x1e/0x40 fs/namei.c:2397
 create_local_trace_uprobe+0x96/0x6e0 kernel/trace/trace_uprobe.c:1357
 perf_uprobe_init+0x189/0x260 kernel/trace/trace_event_perf.c:310
 perf_uprobe_event_init+0xdb/0x160 kernel/events/core.c:8444
 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9719
 perf_init_event kernel/events/core.c:9750 [inline]
 perf_event_alloc.part.91+0x1920/0x30a0 kernel/events/core.c:10022
 perf_event_alloc kernel/events/core.c:10376 [inline]
 SYSC_perf_event_open+0xa8a/0x2fa0 kernel/events/core.c:10477
 SyS_perf_event_open+0x35/0x40 kernel/events/core.c:10366
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4552d9
RSP: 002b:00007f1ec591fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1ec59206d4 RCX: 00000000004552d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002000a000
RBP: 000000000072c010 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000458 R14: 00000000006f98e0 R15: 0000000000000002

Allocated by task 4520:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:552
 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3608
 kmalloc include/linux/slab.h:512 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 perf_uprobe_init+0x97/0x260 kernel/trace/trace_event_perf.c:298
 perf_uprobe_event_init+0xdb/0x160 kernel/events/core.c:8444
 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9719
 perf_init_event kernel/events/core.c:9750 [inline]
 perf_event_alloc.part.91+0x1920/0x30a0 kernel/events/core.c:10022
 perf_event_alloc kernel/events/core.c:10376 [inline]
 SYSC_perf_event_open+0xa8a/0x2fa0 kernel/events/core.c:10477
 SyS_perf_event_open+0x35/0x40 kernel/events/core.c:10366
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 2931:
 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:3486 [inline]
 kfree+0xd9/0x260 mm/slab.c:3801
 kvfree+0x61/0x70 mm/util.c:438
 seq_release fs/seq_file.c:368 [inline]
 single_release+0x78/0xb0 fs/seq_file.c:605
 close_pdeo.part.2+0x11e/0x420 fs/proc/inode.c:166
 close_pdeo+0x173/0x1e0 include/linux/spinlock.h:310
 proc_reg_release+0x11b/0x150 fs/proc/inode.c:377
 __fput+0x34d/0x890 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1e4/0x290 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x2bd/0x310 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
 do_syscall_64+0x792/0x9d0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8801ac7ea680
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 0 bytes to the right of
 4096-byte region [ffff8801ac7ea680, ffff8801ac7eb680)
The buggy address belongs to the page:
page:ffffea0006b1fa80 count:1 mapcount:0 mapping:ffff8801ac7ea680 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801ac7ea680 0000000000000000 0000000100000001
raw: ffffea0006b04e20 ffff8801dac01a48 ffff8801dac00dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801ac7eb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801ac7eb600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801ac7eb680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8801ac7eb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801ac7eb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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