diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2023-52449.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2023-52449.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2023-52449.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2023-52449.patch new file mode 100644 index 000000000..ebae2414a --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2023-52449.patch @@ -0,0 +1,83 @@ +From 5389407bba1eab1266c6d83e226fb0840cb98dd5 Mon Sep 17 00:00:00 2001 +From: ZhaoLong Wang <wangzhaolong1@huawei.com> +Date: Wed, 20 Dec 2023 10:46:19 +0800 +Subject: mtd: Fix gluebi NULL pointer dereference caused by ftl notifier +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +[ Upstream commit a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6 ] + +If both ftl.ko and gluebi.ko are loaded, the notifier of ftl +triggers NULL pointer dereference when trying to access +‘gluebi->desc’ in gluebi_read(). + +ubi_gluebi_init + ubi_register_volume_notifier + ubi_enumerate_volumes + ubi_notify_all + gluebi_notify nb->notifier_call() + gluebi_create + mtd_device_register + mtd_device_parse_register + add_mtd_device + blktrans_notify_add not->add() + ftl_add_mtd tr->add_mtd() + scan_header + mtd_read + mtd_read_oob + mtd_read_oob_std + gluebi_read mtd->read() + gluebi->desc - NULL + +Detailed reproduction information available at the Link [1], + +In the normal case, obtain gluebi->desc in the gluebi_get_device(), +and access gluebi->desc in the gluebi_read(). However, +gluebi_get_device() is not executed in advance in the +ftl_add_mtd() process, which leads to NULL pointer dereference. + +The solution for the gluebi module is to run jffs2 on the UBI +volume without considering working with ftl or mtdblock [2]. +Therefore, this problem can be avoided by preventing gluebi from +creating the mtdblock device after creating mtd partition of the +type MTD_UBIVOLUME. + +Fixes: 2ba3d76a1e29 ("UBI: make gluebi a separate module") +Link: https://bugzilla.kernel.org/show_bug.cgi?id=217992 [1] +Link: https://lore.kernel.org/lkml/441107100.23734.1697904580252.JavaMail.zimbra@nod.at/ [2] +Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com> +Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com> +Acked-by: Richard Weinberger <richard@nod.at> +Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> +Link: https://lore.kernel.org/linux-mtd/20231220024619.2138625-1-wangzhaolong1@huawei.com +Signed-off-by: Sasha Levin <sashal@kernel.org> +--- + drivers/mtd/mtd_blkdevs.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c +index 60b222799871e8..8ee60605a6dcc3 100644 +--- a/drivers/mtd/mtd_blkdevs.c ++++ b/drivers/mtd/mtd_blkdevs.c +@@ -463,7 +463,7 @@ static void blktrans_notify_add(struct mtd_info *mtd) + { + struct mtd_blktrans_ops *tr; + +- if (mtd->type == MTD_ABSENT) ++ if (mtd->type == MTD_ABSENT || mtd->type == MTD_UBIVOLUME) + return; + + list_for_each_entry(tr, &blktrans_majors, list) +@@ -503,7 +503,7 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr) + mutex_lock(&mtd_table_mutex); + list_add(&tr->list, &blktrans_majors); + mtd_for_each_device(mtd) +- if (mtd->type != MTD_ABSENT) ++ if (mtd->type != MTD_ABSENT && mtd->type != MTD_UBIVOLUME) + tr->add_mtd(tr, mtd); + mutex_unlock(&mtd_table_mutex); + return 0; +-- +cgit 1.2.3-korg + |