================================================================== BUG: KASAN: stack-out-of-bounds in strlen lib/string.c:481 [inline] BUG: KASAN: stack-out-of-bounds in strlcpy+0x101/0x120 lib/string.c:141 Read of size 1 at addr ffff8801d647fc0c by task syz-executor5/6089 CPU: 1 PID: 6089 Comm: syz-executor5 Not tainted 4.4.152-ge5c5f1f #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 97ec50f22b7db49e ffff8801d647fa80 ffffffff81e15fed ffffea0007591fc0 ffff8801d647fc0c 0000000000000000 ffff8801d647fc0c ffff8801d647fb80 ffff8801d647fab8 ffffffff8151b489 ffff8801d647fc0c Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_address_description+0x6c/0x216 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408 [] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:426 [] strlen lib/string.c:481 [inline] [] strlcpy+0x101/0x120 lib/string.c:141 [] snd_seq_ioctl_create_queue+0x1bf/0x2c0 sound/core/seq/seq_clientmgr.c:1561 [] snd_seq_do_ioctl+0x177/0x1a0 sound/core/seq/seq_clientmgr.c:2223 [] snd_seq_ioctl_compat+0x19c/0x2a0 sound/core/seq/seq_compat.c:126 [] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline] [] compat_SyS_ioctl+0x484/0x2270 fs/compat_ioctl.c:1544 [] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline] [] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460 [] sysenter_flags_fixed+0xd/0x1a The buggy address belongs to the page: page:ffffea0007591fc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d647fb00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ffff8801d647fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801d647fc00: 00 04 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8801d647fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d647fd00: 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 ==================================================================