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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2011-06-26 23:20:23 +0900
committerJames Morris <jmorris@namei.org>2011-06-29 09:31:21 +1000
commit5625f2e3266319fd29fe4f1c76ccd3f550c79ac4 (patch)
tree190e96d956213b22da705872094ebdf5272af972 /security/tomoyo/file.c
parentbd03a3e4c9a9df0c6b007045fa7fc8889111a478 (diff)
TOMOYO: Change pathname for non-rename()able filesystems.
TOMOYO wants to use /proc/self/ rather than /proc/$PID/ if $PID matches current thread's process ID in order to prevent current thread from accessing other process's information unless needed. But since procfs can be mounted on various locations (e.g. /proc/ /proc2/ /p/ /tmp/foo/100/p/ ), TOMOYO cannot tell that whether the numeric part in the string returned by __d_path() represents process ID or not. Therefore, to be able to convert from $PID to self no matter where procfs is mounted, this patch changes pathname representations for filesystems which do not support rename() operation (e.g. proc, sysfs, securityfs). Examples: /proc/self/mounts => proc:/self/mounts /sys/kernel/security/ => sys:/kernel/security/ /dev/pts/0 => devpts:/0 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/file.c')
-rw-r--r--security/tomoyo/file.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 323ddc73a125..8410f28a35e0 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -712,7 +712,7 @@ int tomoyo_path_number_perm(const u8 type, struct path *path,
int idx;
if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
- == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry)
+ == TOMOYO_CONFIG_DISABLED || !path->dentry)
return 0;
idx = tomoyo_read_lock();
if (!tomoyo_get_realpath(&buf, path))
@@ -753,8 +753,6 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
struct tomoyo_request_info r;
int idx;
- if (!path->mnt)
- return 0;
buf.name = NULL;
r.mode = TOMOYO_CONFIG_DISABLED;
idx = tomoyo_read_lock();
@@ -798,8 +796,6 @@ int tomoyo_path_perm(const u8 operation, struct path *path)
bool is_enforce;
int idx;
- if (!path->mnt)
- return 0;
if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
== TOMOYO_CONFIG_DISABLED)
return 0;
@@ -842,8 +838,7 @@ int tomoyo_mkdev_perm(const u8 operation, struct path *path,
struct tomoyo_path_info buf;
int idx;
- if (!path->mnt ||
- tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
== TOMOYO_CONFIG_DISABLED)
return 0;
idx = tomoyo_read_lock();
@@ -884,8 +879,7 @@ int tomoyo_path2_perm(const u8 operation, struct path *path1,
struct tomoyo_request_info r;
int idx;
- if (!path1->mnt || !path2->mnt ||
- tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
== TOMOYO_CONFIG_DISABLED)
return 0;
buf1.name = NULL;