WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop_nlink+0x4b/0x50()

[Vegard Nossum]

Hi,

With the attached vfat disk image (fuzzed), I get the following WARNING:

WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop_nlink+0x4b/0x50()
CPU: 0 PID: 913 Comm: a.out Not tainted 4.2.5+ #39
Stack:
 e0931b50 60075412 e13981e8 00000009
 00000000 605cc684 e0931b60 605cf637
 e0931bc0 60040f6d e0931ba0 6011e12b
Call Trace:
 [<60029f3b>] show_stack+0xdb/0x1a0
 [<605cf637>] dump_stack+0x2a/0x2c
 [<60040f6d>] warn_slowpath_common+0x9d/0xf0
 [<6004114c>] warn_slowpath_null+0x1c/0x20
 [<6011e12b>] drop_nlink+0x4b/0x50
 [<601e9e2f>] vfat_rename+0x56f/0x800
 [<60113dd2>] vfs_rename+0x9a2/0x9d0
 [<60114439>] SyS_renameat2+0x639/0x690
 [<601144d0>] SyS_rename+0x20/0x30
 [<6002c5ce>] handle_syscall+0x6e/0xa0
 [<6003a911>] userspace+0x4f1/0x5e0

To trigger it, you have to do a rename("/mnt/a/b/1", "/mnt/1"), where
/mnt is your mountpoint.

Also happens on 3.13.0 Ubuntu trusty kernel.


Vegard

Attachment: vfat2.img.bz2
Description: application/bzip