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| author | Niels Möller <nisse@lysator.liu.se> | 2016-12-08 09:48:50 +0000 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2016-12-08 10:10:34 +0000 |
| commit | c44da115063bfea7ef8b2afd1c9d52737e2b7f70 (patch) | |
| tree | c90c88e701c97f5272917e60a553cbcd0c40956f /src/factor.c | |
| parent | 11c1b73c1b386a098e5e18af864591541b63d7bf (diff) | |
| download | coreutils-c44da115063bfea7ef8b2afd1c9d52737e2b7f70.tar.gz | |
factor: fix infinite loop in gcd2_odd
* src/factor.c (gcd2_odd): Fix the case a1 == 0, a0 == 0.
* NEWS: Mention the bug fix.
Fixes http://bugs.gnu.org/25135
Diffstat (limited to 'src/factor.c')
| -rw-r--r-- | src/factor.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/factor.c b/src/factor.c index d271de907..115a635f9 100644 --- a/src/factor.c +++ b/src/factor.c @@ -480,10 +480,16 @@ gcd_odd (uintmax_t a, uintmax_t b) static uintmax_t gcd2_odd (uintmax_t *r1, uintmax_t a1, uintmax_t a0, uintmax_t b1, uintmax_t b0) { + assert (b0 & 1); + + if ( (a0 | a1) == 0) + { + *r1 = b1; + return b0; + } + while ((a0 & 1) == 0) rsh2 (a1, a0, a1, a0, 1); - while ((b0 & 1) == 0) - rsh2 (b1, b0, b1, b0, 1); for (;;) { |