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authorSteve French <stfrench@microsoft.com>2021-09-24 03:18:37 +0300
committerSteve French <stfrench@microsoft.com>2021-09-24 05:12:53 +0300
commit9ed38fd4a15417cac83967360cf20b853bfab9b6 (patch)
tree4de3dbe567271625429f6ad2702217cbab05dcbd /fs/cifs
parent1db1aa98871defd9316d13f59708f2277c4f9232 (diff)
downloadlinux-9ed38fd4a15417cac83967360cf20b853bfab9b6.tar.xz
cifs: fix incorrect check for null pointer in header_assemble
Although very unlikely that the tlink pointer would be null in this case, get_next_mid function can in theory return null (but not an error) so need to check for null (not for IS_ERR, which can not be returned here). Address warning: fs/smbfs_client/connect.c:2392 cifs_match_super() warn: 'tlink' isn't an ERR_PTR Pointed out by Dan Carpenter via smatch code analysis tool CC: stable@vger.kernel.org Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/connect.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 7881115cfbee..c3b94c1e4591 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2389,9 +2389,10 @@ cifs_match_super(struct super_block *sb, void *data)
spin_lock(&cifs_tcp_ses_lock);
cifs_sb = CIFS_SB(sb);
tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
- if (IS_ERR(tlink)) {
+ if (tlink == NULL) {
+ /* can not match superblock if tlink were ever null */
spin_unlock(&cifs_tcp_ses_lock);
- return rc;
+ return 0;
}
tcon = tlink_tcon(tlink);
ses = tcon->ses;