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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>
This commit is contained in:
Lasse Collin 2011-01-12 17:01:17 -08:00 committed by Linus Torvalds
parent 22e4420820
commit 8218a43723
1 changed files with 3 additions and 1 deletions
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4
lib/decompress_unlzma.c
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@ -574,8 +574,10 @@ STATIC inline int INIT unlzma(unsigned char *buf, int in_len,
((unsigned char *)&header)[i] = *rc.ptr++; ((unsigned char *)&header)[i] = *rc.ptr++;
} }
if (header.pos >= (9 * 5 * 5)) if (header.pos >= (9 * 5 * 5)) {
error("bad header"); error("bad header");
goto exit_1;
}
mi = 0; mi = 0;
lc = header.pos; lc = header.pos;