EXT4-fs (sda1): Cannot specify journal on remount
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BUG: KASAN: use-after-free in memset include/linux/string.h:329 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize.isra.13+0x108/0x1b0 fs/ext4/inode.c:5775
Write of size 10792 at addr ffff8801a00139a0 by task syz-executor0/9637

CPU: 1 PID: 9637 Comm: syz-executor0 Not tainted 4.14.67+ #1
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 print_address_description+0x60/0x22b mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.6+0x11b/0x2dd mm/kasan/report.c:409
 memset+0x1f/0x40 mm/kasan/kasan.c:285
 memset include/linux/string.h:329 [inline]
 __ext4_expand_extra_isize.isra.13+0x108/0x1b0 fs/ext4/inode.c:5775
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5827 [inline]
 ext4_mark_inode_dirty+0x46c/0x7e0 fs/ext4/inode.c:5903
 ext4_setattr+0x19af/0x2280 fs/ext4/inode.c:5477
 notify_change2+0xad7/0xdd0 fs/attr.c:315
 do_truncate2+0x10f/0x1c0 fs/open.c:63
 handle_truncate fs/namei.c:2998 [inline]
 do_last fs/namei.c:3417 [inline]
 path_openat+0xaea/0x23a0 fs/namei.c:3550
 do_filp_open+0x197/0x270 fs/namei.c:3584
 do_sys_open+0x2ef/0x580 fs/open.c:1071
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457099
RSP: 002b:00007f84b3a35c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f84b3a366d4 RCX: 0000000000457099
RDX: 0000000000002761 RSI: 0000000020000100 RDI: ffffffffffffffff
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d3318 R14: 00000000004c819c R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea00068004c0 count:2 mapcount:0 mapping:ffff8801da4170d0 index:0x4ab
flags: 0x4000000000001074(referenced|dirty|lru|active|private)
raw: 4000000000001074 ffff8801da4170d0 00000000000004ab 00000002ffffffff
raw: ffffea0006cdfe60 ffffea0006802c20 ffff8801c692cb28 ffff8801da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801da81aa80

Memory state around the buggy address:
 ffff8801a0015f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801a0015f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801a0016000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8801a0016080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8801a0016100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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