linux-kernel - Automount causes zero-pointer dereference in 2.6.36-rc2

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-next>] [day] [month] [year] [list]

Date:	Wed, 25 Aug 2010 00:20:30 +0200
From:	"Christopher K." <c.krooss@...glemail.com>
To:	linux-kernel@...r.kernel.org
Subject: Automount causes zero-pointer dereference in 2.6.36-rc2

Hi,
I'm using autofs to mount some cifs shares in my /home.
Running 2.6.36-rc2-git2, browsing /home results in the following error:

BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<c124a921>] strncmp+0x11/0x30
*pde = 00000000
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/virtual/bdi/cifs-5/uevent
Modules linked in:
Pid: 3496, comm: mount.cifs Not tainted 2.6.36-rc2-git2 #2 K50IJ
EIP: 0060:[<c124921>] EFLAGS: 00010216 CPU: 1
EIP is at strncmp+0x11/0x30
EAX: 00000000 EBX: f3a5d200 ECX: 000001ff EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: f3a98408 ESP: f3acde38
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process mount.cifs (pid: 3496, ti=f3acc000, task=f5adc800, task.ti=f3acc000)
Stack:
 f3a98400f5a24080 c119f122 00000000 00000000 00000000 00000000 00000000
<0> 00003674 00000000 00000000 f3a7f02e f5a24080 c17d4320 f5a837c0 c119f784
<0> c15c4280 f3acdea0 00000000 f3b2ae30 f3acdea4 f3b2ae00 00003673 f3b2ae30
Call Trace:
...cifs_get_smb_ses...
...cifs_mount...
...kmem_cache_alloc...
...cifs_get_sb...
...vfs_kern_mount...
...get_fs_type...
...do_kern_mount...
...do_mount...
...copy_mount_options...
...sys_mount...
...sysenter_do_call...

I believe it's kernel-related, as it does not occur in <= 2.6.35.2
Should I recompile my kernel to enable some more debugging-information?
Christopher
--
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/