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Smack: Fix possible NULL pointer dereference at smk_netlbl_mls()

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netlbl_secattr_catmap_alloc(GFP_ATOMIC) can return NULL.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
This commit is contained in:
Tetsuo Handa 2013-05-27 20:11:27 +09:00 committed by Casey Schaufler
parent e830b39412
commit 8cd77a0bd4
1 changed files with 2 additions and 0 deletions
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2
security/smack/smack_access.c
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@ -403,6 +403,8 @@ int smk_netlbl_mls(int level, char *catset, struct netlbl_lsm_secattr *sap,
sap->flags |= NETLBL_SECATTR_MLS_CAT;
sap->attr.mls.lvl = level;
sap->attr.mls.cat = netlbl_secattr_catmap_alloc(GFP_ATOMIC);
if (!sap->attr.mls.cat)
return -ENOMEM;
sap->attr.mls.cat->startbit = 0;
for (cat = 1, cp = catset, byte = 0; byte < len; cp++, byte++)