|
 |
7fd79c |
From e7870afe3c13dcc77845d48409daa35e3e42b5fb Mon Sep 17 00:00:00 2001
|
|
|
7fd79c |
From: "Brian C. Lane" <bcl@redhat.com>
|
|
|
7fd79c |
Date: Thu, 25 May 2017 09:42:23 -0700
|
|
|
7fd79c |
Subject: [PATCH] libparted: Fix udev cookie leak in _dm_resize_partition
|
|
|
7fd79c |
|
|
|
7fd79c |
The function is setting udev cookies, but not using them when waiting
|
|
|
7fd79c |
for the task. This results in leaked cookies, which can eventually
|
|
|
7fd79c |
exhaust the available number of semaphores.
|
|
|
7fd79c |
|
|
|
7fd79c |
'dmsetup udevcookies' will show a cookie remaining afterwards, and 'ipcs -s'
|
|
|
7fd79c |
will show the semaphores in use.
|
|
|
7fd79c |
|
|
|
7fd79c |
Also simplified the exit so that the task is always destroyed and memory
|
|
|
7fd79c |
is all freed in the same path.
|
|
|
7fd79c |
|
|
|
7fd79c |
Resolves: rhbz#1455564
|
|
|
7fd79c |
---
|
|
|
7fd79c |
libparted/arch/linux.c | 14 +++++++-------
|
|
|
7fd79c |
1 file changed, 7 insertions(+), 7 deletions(-)
|
|
|
7fd79c |
|
|
|
7fd79c |
diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c
|
|
|
7fd79c |
index 9886d6e..1a35964 100644
|
|
|
7fd79c |
--- a/libparted/arch/linux.c
|
|
|
7fd79c |
+++ b/libparted/arch/linux.c
|
|
|
7fd79c |
@@ -2943,6 +2943,7 @@ _dm_resize_partition (PedDisk* disk, const PedPartition* part)
|
|
|
7fd79c |
char* vol_name = NULL;
|
|
|
7fd79c |
const char* dev_name = NULL;
|
|
|
7fd79c |
uint32_t cookie = 0;
|
|
|
7fd79c |
+ int rc = 0;
|
|
|
7fd79c |
|
|
|
7fd79c |
/* Get map name from devicemapper */
|
|
|
7fd79c |
struct dm_task *task = dm_task_create (DM_DEVICE_INFO);
|
|
|
7fd79c |
@@ -2983,8 +2984,9 @@ _dm_resize_partition (PedDisk* disk, const PedPartition* part)
|
|
|
7fd79c |
/* device-mapper uses 512b units, not the device's sector size */
|
|
|
7fd79c |
dm_task_add_target (task, 0, part->geom.length * (disk->dev->sector_size / PED_SECTOR_SIZE_DEFAULT),
|
|
|
7fd79c |
"linear", params);
|
|
|
7fd79c |
- if (!dm_task_set_cookie (task, &cookie, 0))
|
|
|
7fd79c |
- goto err;
|
|
|
7fd79c |
+ /* NOTE: DM_DEVICE_RELOAD doesn't generate udev events, so no cookie is needed (it will freeze).
|
|
|
7fd79c |
+ * DM_DEVICE_RESUME does, so get a cookie and synchronize with udev.
|
|
|
7fd79c |
+ */
|
|
|
7fd79c |
if (dm_task_run (task)) {
|
|
|
7fd79c |
dm_task_destroy (task);
|
|
|
7fd79c |
task = dm_task_create (DM_DEVICE_RESUME);
|
|
|
7fd79c |
@@ -2993,10 +2995,8 @@ _dm_resize_partition (PedDisk* disk, const PedPartition* part)
|
|
|
7fd79c |
dm_task_set_name (task, vol_name);
|
|
|
7fd79c |
if (!dm_task_set_cookie (task, &cookie, 0))
|
|
|
7fd79c |
goto err;
|
|
|
7fd79c |
- if (dm_task_run (task)) {
|
|
|
7fd79c |
- free (params);
|
|
|
7fd79c |
- free (vol_name);
|
|
|
7fd79c |
- return 1;
|
|
|
7fd79c |
+ if (_dm_task_run_wait (task, cookie)) {
|
|
|
7fd79c |
+ rc = 1;
|
|
|
7fd79c |
}
|
|
|
7fd79c |
}
|
|
|
7fd79c |
err:
|
|
|
7fd79c |
@@ -3005,7 +3005,7 @@ err:
|
|
|
7fd79c |
dm_task_destroy (task);
|
|
|
7fd79c |
free (params);
|
|
|
7fd79c |
free (vol_name);
|
|
|
7fd79c |
- return 0;
|
|
|
7fd79c |
+ return rc;
|
|
|
7fd79c |
}
|
|
|
7fd79c |
|
|
|
7fd79c |
#endif
|
|
|
7fd79c |
--
|
|
|
7fd79c |
2.9.4
|
|
|
7fd79c |
|