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authorJeff Layton <jeff.layton@primarydata.com>2015-03-05 01:34:32 +0300
committerJeff Layton <jeff.layton@primarydata.com>2015-03-05 01:34:32 +0300
commit0164bf0239777811bdc3e01f45501174dc6db19d (patch)
treeab038158e85748e6769dea13004c5a9591d10f1a /fs
parent6587457b4b3d663b237a0f95ddf6e67d1828c8ea (diff)
downloadlinux-0164bf0239777811bdc3e01f45501174dc6db19d.tar.xz
locks: fix fasync_struct memory leak in lease upgrade/downgrade handling
Commit 8634b51f6ca2 (locks: convert lease handling to file_lock_context) introduced a regression in the handling of lease upgrade/downgrades. In the event that we already have a lease on a file and are going to either upgrade or downgrade it, we skip doing any list insertion or deletion and simply re-call lm_setup on the existing lease. As of commit 8634b51f6ca2 however, we end up calling lm_setup on the lease that was passed in, instead of on the existing lease. This causes us to leak the fasync_struct that was allocated in the event that there was not already an existing one (as it always appeared that there wasn't one). Fixes: 8634b51f6ca2 (locks: convert lease handling to file_lock_context) Reported-and-Tested-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/locks.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/locks.c b/fs/locks.c
index 365c82e1b3a9..f1bad681fc1c 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1665,7 +1665,8 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr
}
if (my_fl != NULL) {
- error = lease->fl_lmops->lm_change(my_fl, arg, &dispose);
+ lease = my_fl;
+ error = lease->fl_lmops->lm_change(lease, arg, &dispose);
if (error)
goto out;
goto out_setup;