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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-02-25 16:54:37 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-02-25 16:54:37 -0500 |
| commit | b35905c16ad6428551eb9e49525011bd2700cf56 (patch) | |
| tree | 155ae1b76392b38a6079dcc5de15b123b3c20953 /fs/ext4 | |
| parent | 4cdeed861b5f797b3fa661eb331a6bd6ad669c6a (diff) | |
| download | linux-b35905c16ad6428551eb9e49525011bd2700cf56.tar.bz2 | |
ext4: Fix memory and buffer head leak in callers to ext4_ext_find_extent()
The path variable returned via ext4_ext_find_extent is a kmalloc
variable and needs to be freeded. It also contains a reference to
buffer_head which needs to be dropped.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/extents.c | 6 | ||||
| -rw-r--r-- | fs/ext4/migrate.c | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e856f660fc30..995ac16102a9 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -349,7 +349,7 @@ static void ext4_ext_show_leaf(struct inode *inode, struct ext4_ext_path *path) #define ext4_ext_show_leaf(inode,path) #endif -static void ext4_ext_drop_refs(struct ext4_ext_path *path) +void ext4_ext_drop_refs(struct ext4_ext_path *path) { int depth = path->p_depth; int i; @@ -2200,10 +2200,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle, newdepth = ext_depth(inode); if (newdepth != depth) { depth = newdepth; - path = ext4_ext_find_extent(inode, iblock, NULL); + ext4_ext_drop_refs(path); + path = ext4_ext_find_extent(inode, iblock, path); if (IS_ERR(path)) { err = PTR_ERR(path); - path = NULL; goto out; } eh = path[depth].p_hdr; diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index 8c6c685b9d22..5c1e27de7755 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -43,6 +43,7 @@ static int finish_range(handle_t *handle, struct inode *inode, if (IS_ERR(path)) { retval = PTR_ERR(path); + path = NULL; goto err_out; } @@ -74,6 +75,10 @@ static int finish_range(handle_t *handle, struct inode *inode, } retval = ext4_ext_insert_extent(handle, inode, path, &newext); err_out: + if (path) { + ext4_ext_drop_refs(path); + kfree(path); + } lb->first_pblock = 0; return retval; } |