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| author | Sergey Bugaev <bugaevc@gmail.com> | 2023-04-19 19:02:03 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-04-22 13:50:14 +0200 |
| commit | 533deafbdf189f5fbb280c28562dd43ace2f4b0f (patch) | |
| tree | 292d1cf07d52199a9dd247c6bb06f5566c218855 /gmon/gmon.c | |
| parent | 28a441cc577e31e95742b9ec5f1737b86749b712 (diff) | |
| download | glibc-533deafbdf189f5fbb280c28562dd43ace2f4b0f.zip glibc-533deafbdf189f5fbb280c28562dd43ace2f4b0f.tar.gz glibc-533deafbdf189f5fbb280c28562dd43ace2f4b0f.tar.bz2 | |
Use O_CLOEXEC in more places (BZ #15722)
When opening a temporary file without O_CLOEXEC we risk leaking the
file descriptor if another thread calls (fork and then) exec while we
have the fd open. Fix this by consistently passing O_CLOEXEC everywhere
where we open a file for internal use (and not to return it to the user,
in which case the API defines whether or not the close-on-exec flag
shall be set on the returned fd).
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230419160207.65988-4-bugaevc@gmail.com>
Diffstat (limited to 'gmon/gmon.c')
| -rw-r--r-- | gmon/gmon.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gmon/gmon.c b/gmon/gmon.c index bc0e294..6439ed1 100644 --- a/gmon/gmon.c +++ b/gmon/gmon.c @@ -384,13 +384,14 @@ write_gmon (void) size_t len = strlen (env); char buf[len + 20]; __snprintf (buf, sizeof (buf), "%s.%u", env, __getpid ()); - fd = __open_nocancel (buf, O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW, 0666); + fd = __open_nocancel (buf, O_CREAT | O_TRUNC | O_WRONLY | O_NOFOLLOW + | O_CLOEXEC, 0666); } if (fd == -1) { - fd = __open_nocancel ("gmon.out", O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW, - 0666); + fd = __open_nocancel ("gmon.out", O_CREAT | O_TRUNC | O_WRONLY + | O_NOFOLLOW | O_CLOEXEC, 0666); if (fd < 0) { char buf[300]; |