diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/415-v6.0-mtd-core-check-partition-before-dereference.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/415-v6.0-mtd-core-check-partition-before-dereference.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/415-v6.0-mtd-core-check-partition-before-dereference.patch b/target/linux/generic/backport-5.4/415-v6.0-mtd-core-check-partition-before-dereference.patch new file mode 100644 index 0000000000..028f5baaaa --- /dev/null +++ b/target/linux/generic/backport-5.4/415-v6.0-mtd-core-check-partition-before-dereference.patch @@ -0,0 +1,30 @@ +From 7ec4cdb321738d44ae5d405e7b6ac73dfbf99caa Mon Sep 17 00:00:00 2001 +From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> +Date: Mon, 25 Jul 2022 22:49:25 +0900 +Subject: [PATCH] mtd: core: check partition before dereference + +syzbot is reporting NULL pointer dereference at mtd_check_of_node() [1], +for mtdram test device (CONFIG_MTD_MTDRAM) is not partition. + +Link: https://syzkaller.appspot.com/bug?extid=fe013f55a2814a9e8cfd [1] +Reported-by: syzbot <syzbot+fe013f55a2814a9e8cfd@syzkaller.appspotmail.com> +Reported-by: kernel test robot <oliver.sang@intel.com> +Fixes: ad9b10d1eaada169 ("mtd: core: introduce of support for dynamic partitions") +Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> +CC: stable@vger.kernel.org +Signed-off-by: Richard Weinberger <richard@nod.at> +--- + drivers/mtd/mtdcore.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -602,6 +602,8 @@ static void mtd_check_of_node(struct mtd + return; + + /* Check if a partitions node exist */ ++ if (!mtd_is_partition(mtd)) ++ return; + parent = mtd_get_master(mtd); + parent_dn = dev_of_node(&parent->dev); + if (!parent_dn) |