https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106283
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Depends on| |126830
Last reconfirmed| |2026-08-13
Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
$ cat t.c
#include <unistd.h>
#include <fcntl.h>
extern void closefrom(int lowfd);
void daemonize(void)
{
int fd = open("/dev/null", O_RDWR);
if (fd < 0)
return;
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2)
closefrom(3); /* closes fd, but analyzer doesn't know */
}
$ gcc -fanalyzer -c t.c
t.c: In function 'daemonize':
t.c:18:1: warning: leak of file descriptor 'fd' [-Wanalyzer-fd-leak]
Trunk: https://godbolt.org/z/bGfn5n9Tz
Seen in the August 2026 OpenScanHub mass scan of Fedora 45 (PR 126830)
affecting audit, bash, and others (est. ~50-60 FPs).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126830
[Bug 126830] Tracker bug for -fanalyzer false positives seen in August 2026
OpenScanHub mass scan
