dtucker at zip
Jul 3, 2012, 6:34 AM
Post #1 of 1
(161 views)
Permalink
|
|
possible clang (2.9) bug affecting ssh-keygen
|
|
Hi all.
Has anyone had any success building openssh 6.0p1 using clang 2.9? I
think I found a compiler bug, at least in the 2.9 that ships with fedora
16 (i386). It causes (at least) ssh-keygen to spin indefinitely eating CPU.
I've reduced it to the following test case:
$ cat clang-test.c
#include <unistd.h>
char hostname[64];
int
main(int argc, char **argv)
{
gethostname(hostname, sizeof(hostname));
}
$ clang -O2 -D_FORTIFY_SOURCE clang-test.c
$ ./a.out
[hangs]
It works fine with gcc and clang 3.1 (built from source) on the same
machine and clang 3.0 on ubuntu x86_64. Removing either -O2 or
-D_FORTIFY_SOURCE, or moving hostname from a global to a local variable
causes it to work with 2.9.
Given that it seems to be fixed in the newer clang versions I don't
intend filing a bug unless there's some evidence it affects newer
versions too.
Thanks.
--
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4 37C9 C982 80C7 8FF4 FA69
Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
_______________________________________________
openssh-unix-dev mailing list
openssh-unix-dev [at] mindrot
https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
|
