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| author | Stephen Smalley <sds@tycho.nsa.gov> | 2005-09-09 13:01:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 13:57:27 -0700 |
| commit | 10f47e6a1b8b276323b652053945c87a63a5812d (patch) | |
| tree | a927d6a4129cb9d76e96d2434b4dde7c1aff76d5 | |
| parent | 5e41ff9e0650f327a6c819841fa412da95d57319 (diff) | |
| download | linux-10f47e6a1b8b276323b652053945c87a63a5812d.tar.gz | |
[PATCH] ext2: Enable atomic inode security labeling
This patch modifies ext2 to call the inode_init_security LSM hook to obtain
the security attribute for a newly created inode and to set the resulting
attribute on the new inode. This parallels the existing processing for
setting ACLs on newly created inodes.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | fs/ext2/ialloc.c | 5 | ||||
| -rw-r--r-- | fs/ext2/xattr.h | 8 | ||||
| -rw-r--r-- | fs/ext2/xattr_security.c | 22 |
3 files changed, 35 insertions, 0 deletions
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c index 161f156d98c863..c8d07030c89725 100644 --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -615,6 +615,11 @@ got: DQUOT_DROP(inode); goto fail2; } + err = ext2_init_security(inode,dir); + if (err) { + DQUOT_FREE_INODE(inode); + goto fail2; + } mark_inode_dirty(inode); ext2_debug("allocating inode %lu\n", inode->i_ino); ext2_preread_inode(inode); diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h index 5f3bfde3b8100a..67cfeb66e89732 100644 --- a/fs/ext2/xattr.h +++ b/fs/ext2/xattr.h @@ -116,3 +116,11 @@ exit_ext2_xattr(void) # endif /* CONFIG_EXT2_FS_XATTR */ +#ifdef CONFIG_EXT2_FS_SECURITY +extern int ext2_init_security(struct inode *inode, struct inode *dir); +#else +static inline int ext2_init_security(struct inode *inode, struct inode *dir) +{ + return 0; +} +#endif diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c index 6a6c59fbe59951..a26612798471ce 100644 --- a/fs/ext2/xattr_security.c +++ b/fs/ext2/xattr_security.c @@ -8,6 +8,7 @@ #include <linux/fs.h> #include <linux/smp_lock.h> #include <linux/ext2_fs.h> +#include <linux/security.h> #include "xattr.h" static size_t @@ -45,6 +46,27 @@ ext2_xattr_security_set(struct inode *inode, const char *name, value, size, flags); } +int +ext2_init_security(struct inode *inode, struct inode *dir) +{ + int err; + size_t len; + void *value; + char *name; + + err = security_inode_init_security(inode, dir, &name, &value, &len); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, + name, value, len, 0); + kfree(name); + kfree(value); + return err; +} + struct xattr_handler ext2_xattr_security_handler = { .prefix = XATTR_SECURITY_PREFIX, .list = ext2_xattr_security_list, |