The patch titled
Decompressors: validate match distance in decompress_unlzma.c
has been removed from the -mm tree. Its filename was
decompressors-validate-match-distance-in-decompress_unlzmac.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: Decompressors: validate match distance in decompress_unlzma.c
From: Lasse Collin <lasse.collin@xxxxxxxxxxx>
Validate the newly decoded distance (rep0) in process_bit1(). This is to
detect corrupt LZMA data quickly. The old code can run for long time
producing garbage until it hits the end of the input.
Signed-off-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Alain Knaff <alain@xxxxxxxx>
Cc: Albin Tonnerre <albin.tonnerre@xxxxxxxxxxxxxxxxxx>
Cc: Phillip Lougher <phillip@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/decompress_unlzma.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN lib/decompress_unlzma.c~decompressors-validate-match-distance-in-decompress_unlzmac lib/decompress_unlzma.c
--- a/lib/decompress_unlzma.c~decompressors-validate-match-distance-in-decompress_unlzmac
+++ a/lib/decompress_unlzma.c
@@ -522,6 +522,9 @@ static inline int INIT process_bit1(stru
cst->rep0 = pos_slot;
if (++(cst->rep0) == 0)
return 0;
+ if (cst->rep0 > wr->header->dict_size
+ || cst->rep0 > get_pos(wr))
+ return -1;
}
len += LZMA_MATCH_MIN_LEN;
_
Patches currently in -mm which might be from lasse.collin@xxxxxxxxxxx are
origin.patch
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