linux-kernel - Re: via sata oops on init

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]

Message-ID: <20060729144528.GD28712@leiferikson.dystopia.lan>
Date:	Sat, 29 Jul 2006 16:45:28 +0200
From:	Johannes Weiner <hnazfoo@...glemail.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: via sata oops on init

Hi,

On Fri, Jul 28, 2006 at 07:39:50PM -0400, Dave Jones wrote:
> 2.6.18-rc2-git6
> 
> BUG: unable to handle kernel NULL pointer dereference at 00000000
> EIP is at make_class_name+0x27
> eax: 00000000 ebx: ffffffff ecx: ffffffff edx: 00000009
> esi: f8d16cc2 edi: 00000000 ebp: f7fa9d3c esp: f7fa9d2c
> 
> Call Trace:
> class_device_del+0xac
> class_device_unregister
> scsi_remove_host
> ata_host_remove
> ata_device_add

I think the problem lays in scsi/libata-core.c:5423 in
torvalds/linux-2.6 v2.6.18-rc2-g6482132, stating:

[...]
struct ata_host_set *host_set = kzalloc(...);
[...]

Initialization of some structure members, but not ports(!)

for (...) {
	struct ata_port *ap;

	ap = ata_host_add(ent, host_set, i);
	if (!ap)
		goto err_out;
	
	host_set->ports[i] = ap;

err_out:
	for (i = 0; i < count; i++) {
		ata_host_remove(host_set->ports[i], 1);
[...]

ata_device_add fails, calls ata_host_remove with pointers to unitialized
memory.

Hannes
-
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/