autofs-5.1.4 - fix incorrect locking in sss lookup
From: Ian Kent <raven@themaw.net>
Commit 766e0f6c4, autofs-5.0.7 - fix fix wildcard multi map regression,
introduced a deadlock during restart when the sss modules is used.
Looking at the comment above the code which takes the lock it clearly
does this incorrectly.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
modules/lookup_sss.c | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -34,6 +34,7 @@ xx/xx/2018 autofs-5.1.5
- add master map pseudo options for mount propagation.
- fix age setting at startup.
- fix use after free in parse_ldap_config().
+- fix incorrect locking in sss lookup.
19/12/2017 autofs-5.1.4
- fix spec file url.
--- autofs-5.1.4.orig/modules/lookup_sss.c
+++ autofs-5.1.4/modules/lookup_sss.c
@@ -786,9 +786,9 @@ int lookup_mount(struct autofs_point *ap
* when we're starting up so just take the readlock in that
*/
if (ap->flags & MOUNT_FLAG_REMOUNT)
- cache_writelock(mc);
- else
cache_readlock(mc);
+ else
+ cache_writelock(mc);
me = cache_lookup(mc, key);
/* Stale mapent => check for entry in alternate source or wildcard */
if (me && !me->mapent) {