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cifs: fix a possible null pointer deref in decode_ascii_ssetup 

When kzalloc fails, we will end up doing NULL pointer derefrence

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Namjae Jeon 2014-08-20 19:39:28 +09:00 committed by Steve French
parent 2bb93d2441
commit 27b7edcf1c
1 changed files with 4 additions and 3 deletions
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7
fs/cifs/sess.c
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@ -243,10 +243,11 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
kfree(ses->serverOS);
ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
if (ses->serverOS)
if (ses->serverOS) {
strncpy(ses->serverOS, bcc_ptr, len);
if (strncmp(ses->serverOS, "OS/2", 4) == 0)
cifs_dbg(FYI, "OS/2 server\n");
if (strncmp(ses->serverOS, "OS/2", 4) == 0)
cifs_dbg(FYI, "OS/2 server\n");
}
bcc_ptr += len + 1;
bleft -= len + 1;