Decompressors: fix header validation in decompress_unlzma.c
Validation of header.pos calls error() but doesn't make the function
return to indicate an error to the caller. Instead the decoding is
attempted with invalid header.pos. This fixes it.
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 4817359..696c34a 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -574,8 +574,10 @@
((unsigned char *)&header)[i] = *rc.ptr++;
}
- if (header.pos >= (9 * 5 * 5))
+ if (header.pos >= (9 * 5 * 5)) {
error("bad header");
+ goto exit_1;
+ }
mi = 0;
lc = header.pos;