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There existed about a 1 in 4 billion chance that reading from /dev/urandom

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would return LONG_MIN (1 in 9 quintillion if using 64-bit longs). Since there
is no positive equivalent of LONG_MIN, the result of labs() in this case is
unpredictable. This fixes that situation.

(closes issue #11336, reported and patched by sperreault)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89487 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Michelson
2007-11-21 18:19:22 +00:00
parent 6d8d66e9e7
commit 3851bc9789
1 changed files with 1 additions and 1 deletions
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2
main/utils.c
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@@ -1140,7 +1140,7 @@ long int ast_random(void)
if (dev_urandom_fd >= 0) { if (dev_urandom_fd >= 0) {
int read_res = read(dev_urandom_fd, &res, sizeof(res)); int read_res = read(dev_urandom_fd, &res, sizeof(res));
if (read_res > 0) if (read_res > 0)
return labs(res); return res < 0 ? ~res : res;
} }
#endif #endif
#ifdef linux #ifdef linux