audit: type=1804 audit(1555838227.021:68): pid=7882 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir020778824/syzkaller.BYBuP3/43/bus" dev="sda1" ino=16641 res=1
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BUG: KASAN: global-out-of-bounds in strscpy+0x20e/0x2c0 lib/string.c:206
Read of size 8 at addr ffffffff8677b558 by task syz-executor.3/7917

CPU: 1 PID: 7917 Comm: syz-executor.3 Not tainted 4.14.113 #3
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+0x138/0x19c lib/dump_stack.c:53
 print_address_description.cold+0x5/0x1dc mm/kasan/report.c:252
audit: type=1804 audit(1555838227.081:69): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir762041274/syzkaller.cUNnJ8/41/bus" dev="sda1" ino=16652 res=1
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 strscpy+0x20e/0x2c0 lib/string.c:206
 prepare_error_buf+0x94/0x1aa0 fs/reiserfs/prints.c:213
 __reiserfs_warning+0x9f/0xb0 fs/reiserfs/prints.c:288
 reiserfs_parse_options+0x13cd/0x1820 fs/reiserfs/super.c:1227
input: syz1 as /devices/virtual/input/input7
 reiserfs_fill_super+0x461/0x2b20 fs/reiserfs/super.c:1946
 mount_bdev+0x2c1/0x370 fs/super.c:1134
 get_super_block+0x35/0x40 fs/reiserfs/super.c:2605
 mount_fs+0x9d/0x2a7 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
kobject: 'event4' (ffff888067e4ed78): kobject_add_internal: parent: 'input7', set: 'devices'
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
kobject: 'event4' (ffff888067e4ed78): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b69a
RSP: 002b:00007f53cf40da88 EFLAGS: 00000206
kobject: 'event4' (ffff888067e4ed78): fill_kobj_path: path = '/devices/virtual/input/input7/event4'
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f53cf40db40 RCX: 000000000045b69a
RDX: 00007f53cf40dae0 RSI: 00000000200000c0 RDI: 00007f53cf40db00
RBP: 0000000000000000 R08: 00007f53cf40db40 R09: 00007f53cf40dae0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00000000004c782d R14: 00000000004dd880 R15: 00000000ffffffff

The buggy address belongs to the variable:
kobject: 'event4' (ffff888067e4ed78): kobject_uevent_env
 __func__.31266+0xc38/0x3a60

Memory state around the buggy address:
 ffffffff8677b400: 00 03 fa fa fa fa fa fa 00 00 00 00 fa fa fa fa
 ffffffff8677b480: 05 fa fa fa fa fa fa fa 00 00 00 03 fa fa fa fa
>ffffffff8677b500: 00 03 fa fa fa fa fa fa 00 00 00 03 fa fa fa fa
                                                    ^
kobject: 'event4' (ffff888067e4ed78): fill_kobj_path: path = '/devices/virtual/input/input7/event4'
 ffffffff8677b580: 00 03 fa fa fa fa fa fa 00 00 00 00 00 fa fa fa
 ffffffff8677b600: fa fa fa fa 00 03 fa fa fa fa fa fa 00 00 00 00
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