From: Stanislav Brabec <sbrabec@suse.cz>
Date: Tue, 11 Apr 2017 14:12:52 +0000 (+0200)
Subject: libmount: Ensure utab.lock mode 644
X-Git-Tag: v2.30-rc1~106
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ecfeae90a294;p=thirdparty%2Futil-linux.git

libmount: Ensure utab.lock mode 644

If utab.lock is created by a process with a restricted umask, utab.lock is
created with restricted permissions. It breaks userspace monitor.

Ensure that the mode is always 644.

Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
---

diff --git a/libmount/src/lock.c b/libmount/src/lock.c
index 06eff1344b..f9d0253fb6 100644
--- a/libmount/src/lock.c
+++ b/libmount/src/lock.c
@@ -220,6 +220,11 @@ static int lock_simplelock(struct libmnt_lock *ml)
 		rc = -errno;
 		goto err;
 	}
+	rc = fchmod(ml->lockfile_fd, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+	if (rc < 0) {
+		rc = -errno;
+		goto err;
+	}
 
 	while (flock(ml->lockfile_fd, LOCK_EX) < 0) {
 		int errsv;