F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): Fix alignment : done, start(4096) end(147456) block(12288)
F2FS-fs (loop0): invalid crc value
==================================================================
BUG: KASAN: slab-out-of-bounds in init_min_max_mtime fs/f2fs/segment.c:3497 [inline]
BUG: KASAN: slab-out-of-bounds in build_segment_manager+0x6464/0x7f40 fs/f2fs/segment.c:3577
Read of size 8 at addr ffff8880976d5ae8 by task syz-executor573/6366

CPU: 0 PID: 6366 Comm: syz-executor573 Not tainted 4.14.198-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 init_min_max_mtime fs/f2fs/segment.c:3497 [inline]
 build_segment_manager+0x6464/0x7f40 fs/f2fs/segment.c:3577
 f2fs_fill_super+0x2e21/0x56a0 fs/f2fs/super.c:2581
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446ffa
RSP: 002b:00007fffb1582658 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fffb15826b0 RCX: 0000000000446ffa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffb1582670
RBP: 00007fffb1582670 R08: 00007fffb15826b0 R09: 00007fff00000015
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000008
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003

Allocated by task 6366:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node+0x4c/0x70 mm/slab.c:3689
 kmalloc_node include/linux/slab.h:530 [inline]
 kvmalloc_node+0x46/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:531 [inline]
 kvzalloc include/linux/mm.h:539 [inline]
 build_sit_info fs/f2fs/segment.c:3108 [inline]
 build_segment_manager+0x935/0x7f40 fs/f2fs/segment.c:3553
 f2fs_fill_super+0x2e21/0x56a0 fs/f2fs/super.c:2581
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880976d5640
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1192 bytes inside of
 2048-byte region [ffff8880976d5640, ffff8880976d5e40)
The buggy address belongs to the page:
page:ffffea00025db500 count:1 mapcount:0 mapping:ffff8880976d4540 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff8880976d4540 0000000000000000 0000000100000003
raw: ffffea00025da820 ffff88812fe51948 ffff88812fe50c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880976d5980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880976d5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880976d5a80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                          ^
 ffff8880976d5b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880976d5b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================