The patch titled
Subject: lib/zlib_inflate/inftrees.c: fix potential buffer overflow
has been added to the -mm tree. Its filename is
zlib-inflate-fix-potential-buffer-overflow.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zlib-inflate-fix-potential-buffer-overflow.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zlib-inflate-fix-potential-buffer-overflow.patch
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------------------------------------------------------
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Subject: lib/zlib_inflate/inftrees.c: fix potential buffer overflow
smatch says:
lib/zlib_inflate/inftrees.c:240 zlib_inflate_table() error:
buffer overflow 'count' 16 <= 16
The loop calculating the value for 'min', which is later used to access
count[], can indeed result in an index larger than ARRAY_SIZE(count)
if the array is filled with 0.
Fixes: 4f3865fb57a04 ("zlib_inflate: Upgrade library code to a recent version")
Link: http://lkml.kernel.org/r/1491236059-32592-1-git-send-email-linux@xxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/zlib_inflate/inftrees.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN lib/zlib_inflate/inftrees.c~zlib-inflate-fix-potential-buffer-overflow lib/zlib_inflate/inftrees.c
--- a/lib/zlib_inflate/inftrees.c~zlib-inflate-fix-potential-buffer-overflow
+++ a/lib/zlib_inflate/inftrees.c
@@ -109,7 +109,7 @@ int zlib_inflate_table(codetype type, un
*bits = 1;
return 0; /* no symbols, but wait for decoding to report error */
}
- for (min = 1; min <= MAXBITS; min++)
+ for (min = 1; min < MAXBITS; min++)
if (count[min] != 0) break;
if (root < min) root = min;
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxx are
zlib-inflate-fix-potential-buffer-overflow.patch
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