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ksmbd: missing check for NULL in convert_to_nt_pathname()

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The kmalloc() does not have a NULL check.  This code can be re-written
slightly cleaner to just use the kstrdup().

Fixes: 265fd1991c ("ksmbd: use LOOKUP_BENEATH to prevent the out of share access")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Acked-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Dan Carpenter 2021-09-30 15:24:56 +03:00 committed by Steve French
parent 4227f811cd
commit 87ffb310d5
1 changed files with 7 additions and 10 deletions
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17
fs/ksmbd/misc.c
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@ -162,17 +162,14 @@ char *convert_to_nt_pathname(char *filename)
{
char *ab_pathname;
if (strlen(filename) == 0) {
ab_pathname = kmalloc(2, GFP_KERNEL);
ab_pathname[0] = '\\';
ab_pathname[1] = '\0';
} else {
ab_pathname = kstrdup(filename, GFP_KERNEL);
if (!ab_pathname)
return NULL;
if (strlen(filename) == 0)
filename = "\\";
ksmbd_conv_path_to_windows(ab_pathname);
}
ab_pathname = kstrdup(filename, GFP_KERNEL);
if (!ab_pathname)
return NULL;
ksmbd_conv_path_to_windows(ab_pathname);
return ab_pathname;
}