==================================================================
BUG: KASAN: use-after-free in f2fs_evict_inode+0xdad/0x1070 fs/f2fs/inode.c:544
Read of size 4 at addr ffff888095140a70 by task syz-executor.4/9765

CPU: 0 PID: 9765 Comm: syz-executor.4 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350
 kasan_report mm/kasan/report.c:408 [inline]
 __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:428
 f2fs_evict_inode+0xdad/0x1070 fs/f2fs/inode.c:544
 evict+0x2c8/0x700 fs/inode.c:554
 iput_final fs/inode.c:1523 [inline]
 iput+0x458/0x7e0 fs/inode.c:1550
 dentry_unlink_inode+0x25c/0x310 fs/dcache.c:387
 __dentry_kill+0x320/0x550 fs/dcache.c:591
 shrink_dentry_list+0x2c2/0xac0 fs/dcache.c:1069
 shrink_dcache_sb+0x105/0x1b0 fs/dcache.c:1191
 f2fs_fill_super+0x127f/0x56a0 fs/f2fs/super.c:2767
 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:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f4497e5f62a
RSP: 002b:00007f44963cff88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000005512 RCX: 00007f4497e5f62a
RDX: 0000000020000000 RSI: 0000000020000080 RDI: 00007f44963cffe0
RBP: 00007f44963d0020 R08: 00007f44963d0020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000080 R14: 00007f44963cffe0 R15: 0000000020005600

Allocated by task 9765:
 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
 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 f2fs_fill_super+0xef/0x56a0 fs/f2fs/super.c:2407
 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:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 9765:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 f2fs_fill_super+0x1263/0x56a0 fs/f2fs/super.c:2762
 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:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

The buggy address belongs to the object at ffff888095140140
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2352 bytes inside of
 4096-byte region [ffff888095140140, ffff888095141140)
The buggy address belongs to the page:
page:ffffea0002545000 count:1 mapcount:0 mapping:ffff888095140140 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff888095140140 0000000000000000 0000000100000001
raw: ffffea0002544920 ffffea0002a551a0 ffff88813fe74dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888095140900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888095140980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888095140a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff888095140a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888095140b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Symlink component flag not implemented
Symlink component flag not implemented (7)