xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

selinux: introduce security_context_str_to_sid

Browse Source 
There seems to be a little confusion as to whether the scontext_len
parameter of security_context_to_sid() includes the nul-byte or
not. Reading security_context_to_sid_core(), it seems that the
expectation is that it does not (both the string copying and the test
for scontext_len being zero hint at that).

Introduce the helper security_context_str_to_sid() to do the strlen()
call and fix all callers.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>
This commit is contained in:
Rasmus Villemoes
2015-10-21 17:44:25 -04:00
committed by Paul Moore
parent 44d37ad360
commit 44be2f65d9
4 changed files with 20 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
security/selinux/hooks.c
View File

@@ -674,10 +674,9 @@ static int selinux_set_mnt_opts(struct super_block *sb,
if (flags[i] == SBLABEL_MNT)
continue;
rc = security_context_to_sid(mount_options[i],
strlen(mount_options[i]), &sid, GFP_KERNEL);
rc = security_context_str_to_sid(mount_options[i], &sid, GFP_KERNEL);
if (rc) {
printk(KERN_WARNING "SELinux: security_context_to_sid"
printk(KERN_WARNING "SELinux: security_context_str_to_sid"
"(%s) failed for (dev %s, type %s) errno=%d\n",
mount_options[i], sb->s_id, name, rc);
goto out;
@@ -2617,15 +2616,12 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
for (i = 0; i < opts.num_mnt_opts; i++) {
u32 sid;
size_t len;
if (flags[i] == SBLABEL_MNT)
continue;
len = strlen(mount_options[i]);
rc = security_context_to_sid(mount_options[i], len, &sid,
GFP_KERNEL);
rc = security_context_str_to_sid(mount_options[i], &sid, GFP_KERNEL);
if (rc) {
printk(KERN_WARNING "SELinux: security_context_to_sid"
printk(KERN_WARNING "SELinux: security_context_str_to_sid"
"(%s) failed for (dev %s, type %s) errno=%d\n",
mount_options[i], sb->s_id, sb->s_type->name, rc);
goto out_free_opts;