The patch titled
fs/partitions/ldm.c: fix buffer overflow again
has been added to the -mm tree. Its filename is
fs-partitions-ldmc-fix-buffer-overflow-again.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: fs/partitions/ldm.c: fix buffer overflow again
From: Timo Warns <[email protected]>
c340b1d640001 ("fs/partitions/ldm.c: fix oops caused by corrupted
partition table") was incomplete and incorrect. It does not consider that
for subsequent fragments, previously allocated memory is used.
Signed-off-by: Timo Warns <[email protected]>
Cc: Eugene Teo <[email protected]>
Cc: Harvey Harrison <[email protected]>
Cc: Richard Russon <[email protected]>
Reported-by: Ben Hutchings <[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~fs-partitions-ldmc-fix-buffer-overflow-again
fs/partitions/ldm.c
--- a/fs/partitions/ldm.c~fs-partitions-ldmc-fix-buffer-overflow-again
+++ a/fs/partitions/ldm.c
@@ -1335,6 +1335,11 @@ static bool ldm_frag_add (const u8 *data
list_add_tail (&f->list, frags);
found:
+ if (rec >= f->num) {
+ ldm_error("REC value (%d) exceeds NUM value (%d)", rec, f->num);
+ return false;
+ }
+
if (f->map & (1 << rec)) {
ldm_error ("Duplicate VBLK, part %d.", rec);
f->map &= 0x7F; /* Mark the group as broken */
_
Patches currently in -mm which might be from [email protected] are
fs-partitions-efic-corrupted-guid-partition-tables-can-cause-kernel-oops.patch
fs-partitions-ldmc-fix-buffer-overflow-again.patch
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