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| author | Rafał Miłecki <rafal@milecki.pl> | 2022-10-04 12:04:37 +0200 |
|---|---|---|
| committer | Rafał Miłecki <rafal@milecki.pl> | 2022-10-04 12:06:03 +0200 |
| commit | a5265497a4f6da158e95d6a450cb2cb6dc085cab (patch) | |
| tree | f4dbe5b49558e8458c1d01bb91f4a4469ce9f9bc /target/linux/generic/backport-5.10 | |
| parent | 45109f69a64c31aa64db05d5de37cd7f6a1aaaa2 (diff) | |
| download | upstream-a5265497a4f6da158e95d6a450cb2cb6dc085cab.tar.gz upstream-a5265497a4f6da158e95d6a450cb2cb6dc085cab.tar.bz2 upstream-a5265497a4f6da158e95d6a450cb2cb6dc085cab.zip | |
kernel: fix possible mtd NULL pointer dereference
Fixes: 1a9ee367343ed ("kernel: backport mtd dynamic partition patch")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/generic/backport-5.10')
| -rw-r--r-- | target/linux/generic/backport-5.10/415-v6.0-mtd-core-check-partition-before-dereference.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/415-v6.0-mtd-core-check-partition-before-dereference.patch b/target/linux/generic/backport-5.10/415-v6.0-mtd-core-check-partition-before-dereference.patch new file mode 100644 index 0000000000..65789ddf2d --- /dev/null +++ b/target/linux/generic/backport-5.10/415-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 +@@ -574,6 +574,8 @@ static void mtd_check_of_node(struct mtd + return; + + /* Check if a partitions node exist */ ++ if (!mtd_is_partition(mtd)) ++ return; + parent = mtd->parent; + parent_dn = dev_of_node(&parent->dev); + if (!parent_dn) |