From 61a306c1cc750b15c8b13b3ded623b94cd521fac Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Tue, 19 Dec 2023 00:33:54 +0900 Subject: [PATCH] ksmbd: fix uninitialized pointer read in smb2_create_link() [ Upstream commit df14afeed2e6c1bbadef7d2f9c46887bbd6d8d94 ] There is a case that file_present is true and path is uninitialized. This patch change file_present is set to false by default and set to true when patch is initialized. Fixes: 74d7970febf7 ("ksmbd: fix racy issue from using ->d_parent and ->d_name") Reported-by: Coverity Scan Signed-off-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/ksmbd/smb2pdu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 7d16510e3392d..1eb5a97955caf 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -5529,7 +5529,7 @@ static int smb2_create_link(struct ksmbd_work *work, { char *link_name = NULL, *target_name = NULL, *pathname = NULL; struct path path; - bool file_present = true; + bool file_present = false; int rc; if (buf_len < (u64)sizeof(struct smb2_file_link_info) + @@ -5562,8 +5562,8 @@ static int smb2_create_link(struct ksmbd_work *work, if (rc) { if (rc != -ENOENT) goto out; - file_present = false; - } + } else + file_present = true; if (file_info->ReplaceIfExists) { if (file_present) { -- 2.47.3