Messages in this thread Patch in this message | | | From | Chen Zhou <> | Subject | [PATCH -next] smack: fix a missing-check bug in smack_sb_eat_lsm_opts() | Date | Wed, 1 Apr 2020 15:10:55 +0800 |
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In smack_sb_eat_lsm_opts(), 'arg' is allocated by kmemdup_nul(). It returns NULL when fails, add check for it.
Signed-off-by: Chen Zhou <chenzhou10@huawei.com> --- security/smack/smack_lsm.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 2862fc3..9ec30f3 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -731,6 +731,8 @@ static int smack_sb_eat_lsm_opts(char *options, void **mnt_opts) token = match_opt_prefix(from, len, &arg); if (token != Opt_error) { arg = kmemdup_nul(arg, from + len - arg, GFP_KERNEL); + if (!arg) + return -ENOMEM; rc = smack_add_opt(token, arg, mnt_opts); if (unlikely(rc)) { kfree(arg); -- 2.7.4
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