Messages in this thread Patch in this message |  | | From | Christian Marangi <> | Subject | [PATCH] mtd: core: fix NULL pointer dereference with mtd_check_of_node | Date | Sun, 3 Jul 2022 11:56:31 +0200 |
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Actually check if mtd dev have a parent to fix NULL pointer dereference kernel panic in mtd_check_of_node.
Reported-by: kernel test robot <oliver.sang@intel.com> Fixes: ad9b10d1eaad ("mtd: core: introduce of support for dynamic partitions") Cc: stable@vger.kernel.org Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> --- drivers/mtd/mtdcore.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 6fafea80fd98..48a357fcf2ed 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -558,8 +558,12 @@ static void mtd_check_of_node(struct mtd_info *mtd) if (dev_of_node(&mtd->dev)) return; - /* Check if a partitions node exist */ + /* Make sure we have a parent */ parent = mtd->parent; + if (!parent) + return; + + /* Check if a partitions node exist */ parent_dn = dev_of_node(&parent->dev); if (!parent_dn) return; -- 2.36.1
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