This is a note to let you know that I've just added the patch titled
dm thin: initialize dm_thin_new_mapping returned by get_next_mapping
to the 3.13-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-thin-initialize-dm_thin_new_mapping-returned-by-get_next_mapping.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 16961b042db8cc5cf75d782b4255193ad56e1d4f Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@xxxxxxxxxx>
Date: Tue, 17 Dec 2013 13:19:11 -0500
Subject: dm thin: initialize dm_thin_new_mapping returned by get_next_mapping
From: Mike Snitzer <snitzer@xxxxxxxxxx>
commit 16961b042db8cc5cf75d782b4255193ad56e1d4f upstream.
As additional members are added to the dm_thin_new_mapping structure
care should be taken to make sure they get initialized before use.
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Acked-by: Joe Thornber <ejt@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-thin.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -760,13 +760,17 @@ static int ensure_next_mapping(struct po
static struct dm_thin_new_mapping *get_next_mapping(struct pool *pool)
{
- struct dm_thin_new_mapping *r = pool->next_mapping;
+ struct dm_thin_new_mapping *m = pool->next_mapping;
BUG_ON(!pool->next_mapping);
+ memset(m, 0, sizeof(struct dm_thin_new_mapping));
+ INIT_LIST_HEAD(&m->list);
+ m->bio = NULL;
+
pool->next_mapping = NULL;
- return r;
+ return m;
}
static void schedule_copy(struct thin_c *tc, dm_block_t virt_block,
@@ -778,15 +782,10 @@ static void schedule_copy(struct thin_c
struct pool *pool = tc->pool;
struct dm_thin_new_mapping *m = get_next_mapping(pool);
- INIT_LIST_HEAD(&m->list);
- m->quiesced = 0;
- m->prepared = 0;
m->tc = tc;
m->virt_block = virt_block;
m->data_block = data_dest;
m->cell = cell;
- m->err = 0;
- m->bio = NULL;
if (!dm_deferred_set_add_work(pool->shared_read_ds, &m->list))
m->quiesced = 1;
@@ -849,15 +848,12 @@ static void schedule_zero(struct thin_c
struct pool *pool = tc->pool;
struct dm_thin_new_mapping *m = get_next_mapping(pool);
- INIT_LIST_HEAD(&m->list);
m->quiesced = 1;
m->prepared = 0;
m->tc = tc;
m->virt_block = virt_block;
m->data_block = data_block;
m->cell = cell;
- m->err = 0;
- m->bio = NULL;
/*
* If the whole block of data is being overwritten or we are not
@@ -1055,7 +1051,6 @@ static void process_discard(struct thin_
m->data_block = lookup_result.block;
m->cell = cell;
m->cell2 = cell2;
- m->err = 0;
m->bio = bio;
if (!dm_deferred_set_add_work(pool->all_io_ds, &m->list)) {
Patches currently in stable-queue which might be from snitzer@xxxxxxxxxx are
queue-3.13/dm-thin-fix-discard-support-to-a-previously-shared-block.patch
queue-3.13/dm-thin-fix-set_pool_mode-exposed-pool-operation-races.patch
queue-3.13/dm-space-map-metadata-fix-extending-the-space-map.patch
queue-3.13/dm-space-map-common-make-sure-new-space-is-used-during-extend.patch
queue-3.13/dm-wait-until-embedded-kobject-is-released-before-destroying-a-device.patch
queue-3.13/dm-thin-initialize-dm_thin_new_mapping-returned-by-get_next_mapping.patch
queue-3.13/dm-space-map-metadata-fix-bug-in-resizing-of-thin-metadata.patch
--
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