musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2014年09月16日 16:08:53 -0400
committer	Rich Felker <dalias@aerifal.cx>	2014年09月16日 16:08:53 -0400
commit	e2e1bb81485a37321d928a8d8b63f40b9d8fa228 (patch)
tree	9b62eab14fa49e9a1f7cf9bc350a53d79eca60f0 /src/internal/intscan.c
parent	ec1aed0a144b3e00e16eeb142c9d13362d6048e7 (diff)
download	musl-e2e1bb81485a37321d928a8d8b63f40b9d8fa228.tar.gz

fix overflow corner case in strtoul-family functions

incorrect behavior occurred only in cases where the input overflows unsigned long long, not just the (possibly lower) range limit for the result type. in this case, processing of the '-' sign character was not suppressed, and the function returned a value of 1 despite setting errno to ERANGE.

Diffstat (limited to 'src/internal/intscan.c')

-rw-r--r--

src/internal/intscan.c

1 files changed, 1 insertions, 0 deletions

diff --git a/src/internal/intscan.c b/src/internal/intscan.c
index 69350efa..65d497ec 100644
--- a/src/internal/intscan.c
+++ b/src/internal/intscan.c

@@ -83,6 +83,7 @@ unsigned long long __intscan(FILE *f, unsigned base, int pok, unsigned long long

for (; val[c]<base; c=shgetc(f));

errno = ERANGE;

y = lim;

+ if (lim&1) neg = 0;

}

done:

shunget(f);

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