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| author | Passion,Zhao <passion.zhao@intel.com> | 2013-06-03 05:42:24 +0200 |
|---|---|---|
| committer | Casey Schaufler <casey@schaufler-ca.com> | 2013-06-03 19:56:02 +0200 |
| commit | 0fcfee61d63b82c1eefb5b1a914240480f17d63f (patch) | |
| tree | a61ecc9d44a9ff5501e833253011d443d2a2d011 /security/smack | |
| parent | Smack: Fix possible NULL pointer dereference at smk_netlbl_mls() (diff) | |
| download | linux-0fcfee61d63b82c1eefb5b1a914240480f17d63f.tar.xz linux-0fcfee61d63b82c1eefb5b1a914240480f17d63f.zip | |
Smack: Fix the bug smackcipso can't set CIPSO correctly
Bug report: https://tizendev.org/bugs/browse/TDIS-3891
The reason is userspace libsmack only use "smackfs/cipso2" long-label interface,
but the code's logical is still for orginal fixed length label. Now update
smack_cipso_apply() to support flexible label (<=256 including tailing '\0')
There is also a bug in kernel/security/smack/smackfs.c:
When smk_set_cipso() parsing the CIPSO setting from userspace, the offset of
CIPSO level should be "strlen(label)+1" instead of "strlen(label)"
Signed-off-by: Passion,Zhao <passion.zhao@intel.com>
Diffstat (limited to 'security/smack')
| -rw-r--r-- | security/smack/smackfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index 3c79cba5fa4a..ab167037b2dd 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -881,7 +881,7 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf, if (format == SMK_FIXED24_FMT) rule += SMK_LABELLEN; else - rule += strlen(skp->smk_known); + rule += strlen(skp->smk_known) + 1; ret = sscanf(rule, "%d", &maplevel); if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) |