This is a note to let you know that I've just added the patch titled
dm cache: fix missing ERR_PTR returns and handling
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-cache-fix-missing-err_ptr-returns-and-handling.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 766a78882ddf79b162243649d7dfdbac1fb6fb88 Mon Sep 17 00:00:00 2001
From: Joe Thornber <[email protected]>
Date: Wed, 28 Jan 2015 12:07:46 +0000
Subject: dm cache: fix missing ERR_PTR returns and handling
From: Joe Thornber <[email protected]>
commit 766a78882ddf79b162243649d7dfdbac1fb6fb88 upstream.
Commit 9b1cc9f251 ("dm cache: share cache-metadata object across
inactive and active DM tables") mistakenly ignored the use of ERR_PTR
returns. Restore missing IS_ERR checks and ERR_PTR returns where
appropriate.
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Joe Thornber <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/dm-cache-metadata.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -683,7 +683,7 @@ static struct dm_cache_metadata *metadat
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
DMERR("could not allocate metadata struct");
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
atomic_set(&cmd->ref_count, 1);
@@ -745,7 +745,7 @@ static struct dm_cache_metadata *lookup_
return cmd;
cmd = metadata_open(bdev, data_block_size, may_format_device,
policy_hint_size);
- if (cmd) {
+ if (!IS_ERR(cmd)) {
mutex_lock(&table_lock);
cmd2 = lookup(bdev);
if (cmd2) {
@@ -780,9 +780,10 @@ struct dm_cache_metadata *dm_cache_metad
{
struct dm_cache_metadata *cmd = lookup_or_open(bdev, data_block_size,
may_format_device,
policy_hint_size);
- if (cmd && !same_params(cmd, data_block_size)) {
+
+ if (!IS_ERR(cmd) && !same_params(cmd, data_block_size)) {
dm_cache_metadata_close(cmd);
- return NULL;
+ return ERR_PTR(-EINVAL);
}
return cmd;
Patches currently in stable-queue which might be from [email protected] are
queue-3.18/dm-cache-fix-missing-err_ptr-returns-and-handling.patch
queue-3.18/dm-thin-don-t-allow-messages-to-be-sent-to-a-pool-target-in-read_only-or-fail-mode.patch
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