https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197534
Bug ID: 197534
Summary: Repeatable segfault in unbound when re-reading config
Product: Base System
Version: 11.0-CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Sometimes during normal operation (network interface change, etc.) and when
unbound is manually sent a SIGHUP, it reloads its config. When it does that,
and it is already chrooted (as per default config in FreeBSD) it crashes.
This is due to the following code in contrib/unbound/util/config_file.c:
1200 /* translate username into uid and gid */
1201 if(cfg->username && cfg->username[0]) {
1202 struct passwd *pwd;
1203 if((pwd = getpwnam(cfg->username)) == NULL)
1204 log_err("user '%s' does not exist.", cfg->username);
1205 cfg->uid = pwd->pw_uid;
1206 cfg->gid = pwd->pw_gid;
1207 }
The crash occurs at line 1205. As you can see, even though the call to
getpwnam() returns NULL because of a missing /etc/pwd.db in the chroot, an
error message is logged but it goes ahead and follows the null pointer
pwd->pw_uid anyway.
Furthermore, if a copy of /etc/pwd.db is placed in /var/unbound/etc/, the crash
does not happen on SIGHUP.
--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-bugs
To unsubscribe, send any mail to "[email protected]"
