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cifs: fix NULL pointer dereference in cifs_find_smb_ses

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cifs_find_smb_ses assumes that the vol->password field is a valid
pointer, but that's only the case if a password was passed in via
the options string. It's possible that one won't be if there is
no mount helper on the box.

Reported-by: diabel <gacek-2004@wp.pl>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2010-08-18 13:13:39 -04:00 committed by Steve French
parent 232341ba7f
commit fc87a40677
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/connect.c
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@ -1673,7 +1673,8 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
MAX_USERNAME_SIZE)) MAX_USERNAME_SIZE))
continue; continue;
if (strlen(vol->username) != 0 && if (strlen(vol->username) != 0 &&
strncmp(ses->password, vol->password, strncmp(ses->password,
vol->password ? vol->password : "",
MAX_PASSWORD_SIZE)) MAX_PASSWORD_SIZE))
continue; continue;
} }