diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2022-2978.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2022-2978.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2022-2978.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2022-2978.patch new file mode 100644 index 000000000..c43941f9f --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2022-2978.patch @@ -0,0 +1,62 @@ +From 2a96b532098284ecf8e4849b8b9e5fc7a28bdee9 Mon Sep 17 00:00:00 2001 +From: Dongliang Mu <mudongliangabcd@gmail.com> +Date: Tue, 16 Aug 2022 12:08:58 +0800 +Subject: [PATCH] fs: fix UAF/GPF bug in nilfs_mdt_destroy +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +commit 2e488f13755ffbb60f307e991b27024716a33b29 upstream. + +In alloc_inode, inode_init_always() could return -ENOMEM if +security_inode_alloc() fails, which causes inode->i_private +uninitialized. Then nilfs_is_metadata_file_inode() returns +true and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(), +which frees the uninitialized inode->i_private +and leads to crashes(e.g., UAF/GPF). + +Fix this by moving security_inode_alloc just prior to +this_cpu_inc(nr_inodes) + +Link: https://lkml.kernel.org/r/CAFcO6XOcf1Jj2SeGt=jJV59wmhESeSKpfR0omdFRq+J9nD1vfQ@mail.gmail.com +Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com> +Reported-by: Hao Sun <sunhao.th@gmail.com> +Reported-by: Jiacheng Xu <stitch@zju.edu.cn> +Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> +Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com> +Cc: Al Viro <viro@zeniv.linux.org.uk> +Cc: stable@vger.kernel.org +Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + fs/inode.c | 7 +++---- + 1 file changed, 3 insertions(+), 4 deletions(-) + +diff --git a/fs/inode.c b/fs/inode.c +index ba1de23c13c1ed..b608528efd3a46 100644 +--- a/fs/inode.c ++++ b/fs/inode.c +@@ -192,8 +192,6 @@ int inode_init_always(struct super_block *sb, struct inode *inode) + inode->i_wb_frn_history = 0; + #endif + +- if (security_inode_alloc(inode)) +- goto out; + spin_lock_init(&inode->i_lock); + lockdep_set_class(&inode->i_lock, &sb->s_type->i_lock_key); + +@@ -228,11 +226,12 @@ int inode_init_always(struct super_block *sb, struct inode *inode) + inode->i_fsnotify_mask = 0; + #endif + inode->i_flctx = NULL; ++ ++ if (unlikely(security_inode_alloc(inode))) ++ return -ENOMEM; + this_cpu_inc(nr_inodes); + + return 0; +-out: +- return -ENOMEM; + } + EXPORT_SYMBOL(inode_init_always); + |