The patch titled
ldm: corrupted partition table can cause kernel oops
has been added to the -mm tree. Its filename is
ldm-corrupted-partition-table-can-cause-kernel-oops.patch
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------------------------------------------------------
Subject: ldm: corrupted partition table can cause kernel oops
From: Timo Warns <[email protected]>
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]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/partitions/ldm.c | 5 +++++
1 file changed, 5 insertions(+)
diff -puN
fs/partitions/ldm.c~ldm-corrupted-partition-table-can-cause-kernel-oops
fs/partitions/ldm.c
--- a/fs/partitions/ldm.c~ldm-corrupted-partition-table-can-cause-kernel-oops
+++ a/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 -mm which might be from [email protected] are
ldm-corrupted-partition-table-can-cause-kernel-oops.patch
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