From cc33149e5aa1929d4e21269ca88225ecf2a2cef3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=D0=BD=D0=B0=D0=B1?= Date: Sun, 11 Apr 2021 19:27:43 +0200 Subject: [PATCH] libshare: nfs: don't leak nfs_lock_fd when lock fails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reviewed-by: Brian Behlendorf Reviewed-by: George Wilson Signed-off-by: Ahelenia Ziemiańska Closes #11886 --- lib/libshare/os/freebsd/nfs.c | 13 +++++++++---- lib/libshare/os/linux/nfs.c | 13 +++++++++---- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/lib/libshare/os/freebsd/nfs.c b/lib/libshare/os/freebsd/nfs.c index f11e77b849..b0394dfab0 100644 --- a/lib/libshare/os/freebsd/nfs.c +++ b/lib/libshare/os/freebsd/nfs.c @@ -65,17 +65,22 @@ static int nfs_lock_fd = -1; static int nfs_exports_lock(void) { + int err; + nfs_lock_fd = open(ZFS_EXPORTS_LOCK, O_RDWR | O_CREAT | O_CLOEXEC, 0600); if (nfs_lock_fd == -1) { + err = errno; fprintf(stderr, "failed to lock %s: %s\n", - ZFS_EXPORTS_LOCK, strerror(errno)); - return (errno); + ZFS_EXPORTS_LOCK, strerror(err)); + return (err); } if (flock(nfs_lock_fd, LOCK_EX) != 0) { + err = errno; fprintf(stderr, "failed to lock %s: %s\n", - ZFS_EXPORTS_LOCK, strerror(errno)); - return (errno); + ZFS_EXPORTS_LOCK, strerror(err)); + (void) close(nfs_lock_fd); + return (err); } return (0); } diff --git a/lib/libshare/os/linux/nfs.c b/lib/libshare/os/linux/nfs.c index 21d52953fa..a7bcbd1385 100644 --- a/lib/libshare/os/linux/nfs.c +++ b/lib/libshare/os/linux/nfs.c @@ -65,17 +65,22 @@ static int nfs_lock_fd = -1; static int nfs_exports_lock(void) { + int err; + nfs_lock_fd = open(ZFS_EXPORTS_LOCK, O_RDWR | O_CREAT | O_CLOEXEC, 0600); if (nfs_lock_fd == -1) { + err = errno; fprintf(stderr, "failed to lock %s: %s\n", - ZFS_EXPORTS_LOCK, strerror(errno)); - return (errno); + ZFS_EXPORTS_LOCK, strerror(err)); + return (err); } if (flock(nfs_lock_fd, LOCK_EX) != 0) { + err = errno; fprintf(stderr, "failed to lock %s: %s\n", - ZFS_EXPORTS_LOCK, strerror(errno)); - return (errno); + ZFS_EXPORTS_LOCK, strerror(err)); + (void) close(nfs_lock_fd); + return (err); } return (0); }