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authorFelix Fietkau <nbd@openwrt.org>2010-07-04 15:28:41 +0000
committerFelix Fietkau <nbd@openwrt.org>2010-07-04 15:28:41 +0000
commit3512ba10c03e976ddfa236f9dd35cc6dc089514e (patch)
tree7df0f93a6adcb17b6bfb217c6260aa8ecdf05f41 /target/linux/generic/patches-2.6.32
parent15b209d09f853e43319c09a3cdc7b414ba696d89 (diff)
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mini_fo: add error pointer checks after dentry lookups to fix various crash bugs (fixes #7277, #7207, #7259)
SVN-Revision: 22057
Diffstat (limited to 'target/linux/generic/patches-2.6.32')
-rw-r--r--target/linux/generic/patches-2.6.32/217-mini_fo_dentry_check.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.32/217-mini_fo_dentry_check.patch b/target/linux/generic/patches-2.6.32/217-mini_fo_dentry_check.patch
new file mode 100644
index 0000000..cf53e48
--- /dev/null
+++ b/target/linux/generic/patches-2.6.32/217-mini_fo_dentry_check.patch
@@ -0,0 +1,48 @@
+--- a/fs/mini_fo/meta.c
++++ b/fs/mini_fo/meta.c
+@@ -48,6 +48,9 @@ int meta_build_lists(dentry_t *dentry)
+ dtohd2(dentry),
+ strlen(META_FILENAME));
+ mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
++ if (IS_ERR(meta_dentry))
++ goto out_ok;
++
+ if(!meta_dentry->d_inode) {
+ dput(meta_dentry);
+ goto out_ok;
+@@ -433,6 +436,8 @@ int meta_write_d_entry(dentry_t *dentry,
+ meta_dentry = lookup_one_len(META_FILENAME,
+ dtohd2(dentry), strlen (META_FILENAME));
+ mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
++ if (IS_ERR(meta_dentry))
++ return PTR_ERR(meta_dentry);
+
+ /* We need to create a META-file */
+ if(!meta_dentry->d_inode) {
+@@ -538,6 +543,8 @@ int meta_write_r_entry(dentry_t *dentry,
+ dtohd2(dentry),
+ strlen (META_FILENAME));
+ mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
++ if (IS_ERR(meta_dentry))
++ return PTR_ERR(meta_dentry);
+
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */
+@@ -656,6 +663,8 @@ int meta_sync_d_list(dentry_t *dentry, i
+ dtohd2(dentry),
+ strlen(META_FILENAME));
+ mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
++ if (IS_ERR(meta_dentry))
++ return PTR_ERR(meta_dentry);
+
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */
+@@ -803,6 +812,8 @@ int meta_sync_r_list(dentry_t *dentry, i
+ dtohd2(dentry),
+ strlen(META_FILENAME));
+ mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
++ if (IS_ERR(meta_dentry))
++ return PTR_ERR(meta_dentry);
+
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */