This is a note to let you know that I've just added the patch titled
ldm: corrupted partition table can cause kernel oops
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
ldm-corrupted-partition-table-can-cause-kernel-oops.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From 294f6cf48666825d23c9372ef37631232746e40d Mon Sep 17 00:00:00 2001
From: Timo Warns <[email protected]>
Date: Fri, 25 Feb 2011 14:44:21 -0800
Subject: ldm: corrupted partition table can cause kernel oops
From: Timo Warns <[email protected]>
commit 294f6cf48666825d23c9372ef37631232746e40d upstream.
The kernel automatically evaluates partition tables of storage devices.
The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains
a bug that causes a kernel oops on certain corrupted LDM partitions. A
kernel subsystem seems to crash, because, after the oops, the kernel no
longer recognizes newly connected storage devices.
The patch changes ldm_parse_vmdb() to Validate the value of vblk_size.
Signed-off-by: Timo Warns <[email protected]>
Cc: Eugene Teo <[email protected]>
Acked-by: Richard Russon <[email protected]>
Cc: Harvey Harrison <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/partitions/ldm.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/fs/partitions/ldm.c
+++ b/fs/partitions/ldm.c
@@ -251,6 +251,11 @@ static bool ldm_parse_vmdb (const u8 *da
}
vm->vblk_size = get_unaligned_be32(data + 0x08);
+ if (vm->vblk_size == 0) {
+ ldm_error ("Illegal VBLK size");
+ return false;
+ }
+
vm->vblk_offset = get_unaligned_be32(data + 0x0C);
vm->last_vblk_seq = get_unaligned_be32(data + 0x04);
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
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