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smack: Replace kzalloc + strncpy with kstrndup

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Simplify the code by using kstrndup instead of kzalloc and strncpy in
smk_parse_smack(), which meanwhile remove strncpy as [1] suggests.

[1]: https://github.com/KSPP/linux/issues/90

Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
This commit is contained in:
GONG, Ruiqi 2022-06-06 16:17:14 +08:00 committed by Casey Schaufler
parent f2906aa863
commit 63c3b5d2ca
1 changed files with 2 additions and 5 deletions
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7
security/smack/smack_access.c
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@ -465,12 +465,9 @@ char *smk_parse_smack(const char *string, int len)
if (i == 0 || i >= SMK_LONGLABEL) if (i == 0 || i >= SMK_LONGLABEL)
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
smack = kzalloc(i + 1, GFP_NOFS); smack = kstrndup(string, i, GFP_NOFS);
if (smack == NULL) if (!smack)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
strncpy(smack, string, i);
return smack; return smack;
} }