linux-kernel - Re: WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 23 Nov 2015 23:21:32 +0100
From:	Richard Weinberger <richard@....at>
To:	Vegard Nossum <vegard.nossum@...cle.com>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop_nlink+0x4b/0x50()



Am 23.11.2015 um 08:55 schrieb 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.

Not here. All I get is:
FAT-fs (ubdb): Corrupted directory (i_pos 244)

Did you something before the rename()?

Thanks,
//richard
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/