From 02ba8fb3357daf57f6120ac512fb464a4c623419 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 4 Jun 2014 16:21:19 +0200 Subject: [PATCH 1/1] udev: guard REREADPT by exclusive lock instead of O_EXCL --- src/udev/udevd.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/udev/udevd.c b/src/udev/udevd.c index 81e3f69a3..0f3f3f087 100644 --- a/src/udev/udevd.c +++ b/src/udev/udevd.c @@ -755,9 +755,12 @@ static int synthesize_change(struct udev_device *dev) { * partition table is found, and we will not get an event for * the disk. */ - fd = open(udev_device_get_devnode(dev), O_RDONLY|O_EXCL|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); + fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); if (fd >= 0) { - r = ioctl(fd, BLKRRPART, 0); + r = flock(fd, LOCK_EX|LOCK_NB); + if (r >= 0) + r = ioctl(fd, BLKRRPART, 0); + close(fd); if (r >= 0) part_table_read = true; -- 2.30.2