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author | Dmitry Kasatkin <d.kasatkin@samsung.com> | 2014-08-19 17:48:39 +0400 |
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committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-09-09 18:28:52 +0400 |
commit | 17f4bad3abc7c09f42987d89ccccab02c03455a9 (patch) | |
tree | 308b64c40ab744ab7d65419bbd6df73cc559365c /security/integrity/ima/ima_api.c | |
parent | 86f2bc024966d962d4d7575468e226e2269d198c (diff) | |
download | linux-17f4bad3abc7c09f42987d89ccccab02c03455a9.tar.xz |
ima: remove usage of filename parameter
In all cases except ima_bprm_check() the filename was not defined
and ima_d_path() was used to find the full path. Unfortunately,
the bprm filename is a relative pathname (eg. ./<dir>/filename).
ima_bprm_check() selects between bprm->interp and bprm->filename.
The following dump demonstrates the differences between using
filename and interp.
bprm->filename
filename: ./foo.sh, pathname: /root/bin/foo.sh
filename: ./foo.sh, pathname: /bin/dash
bprm->interp
filename: ./foo.sh, pathname: /root/bin/foo.sh
filename: /bin/sh, pathname: /bin/dash
In both cases the pathnames are currently the same. This patch
removes usage of filename and interp in favor of d_absolute_path.
Changes v3:
- 11 extra bytes for "deleted" not needed (Mimi)
- purpose "replace relative bprm filename with full pathname" (Mimi)
Changes v2:
- use d_absolute_path() instead of d_path to work in chroot environments.
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'security/integrity/ima/ima_api.c')
-rw-r--r-- | security/integrity/ima/ima_api.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index d9cd5ce14d2b..65c41a968cc1 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -330,10 +330,9 @@ const char *ima_d_path(struct path *path, char **pathbuf) { char *pathname = NULL; - /* We will allow 11 spaces for ' (deleted)' to be appended */ - *pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL); + *pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); if (*pathbuf) { - pathname = d_path(path, *pathbuf, PATH_MAX + 11); + pathname = d_absolute_path(path, *pathbuf, PATH_MAX); if (IS_ERR(pathname)) { kfree(*pathbuf); *pathbuf = NULL; |