zcomp_create() verifies the success of zcomp_strm_{multi,siggle}_create()
through comp->stream, which can potentially be pointing to memory that was
freed if these functions returned an error.
Fixes: beca3ec71fe5 ("zram: add multi stream functionality")
Cc: sta...@vger.kernel.org
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/block/zram/zcomp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 965d1afb0eaa..f3db8158e172 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -212,6 +212,7 @@ static int zcomp_strm_multi_create(struct zcomp *comp, int
max_strm)
zstrm = zcomp_strm_alloc(comp);
if (!zstrm) {
kfree(zs);
+ comp->stream = NULL;
return -ENOMEM;
}
list_add(&zstrm->list, &zs->idle_strm);
@@ -262,6 +263,7 @@ static int zcomp_strm_single_create(struct zcomp *comp)
zs->zstrm = zcomp_strm_alloc(comp);
if (!zs->zstrm) {
kfree(zs);
+ comp->stream = NULL;
return -ENOMEM;
}
return 0;
--
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