From: Steve French <stfrench@microsoft.com>
Date: Wed, 14 Nov 2018 01:37:39 -0600
Subject: [PATCH] cifs: smb2 commands can not be negative, remove confusing
check
Git-commit: f5942db5ef25531d53f2aa2ff84a46e1763b4196
Patch-mainline: v5.0-rc1
References: bsc#1144333
As Coverity points out le16_to_cpu(midEntry->Command) can not be
less than zero.
Detected by CoverityScan, CID#1438650 ("Macro compares unsigned to 0")
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
fs/cifs/transport.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 83ff0c25710d..5be7302853b6 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -126,9 +126,11 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
if ((slow_rsp_threshold != 0) &&
time_after(now, midEntry->when_alloc + (slow_rsp_threshold * HZ)) &&
(midEntry->command != command)) {
- /* smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command */
- if ((le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS) &&
- (le16_to_cpu(midEntry->command) >= 0))
+ /*
+ * smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command
+ * NB: le16_to_cpu returns unsigned so can not be negative below
+ */
+ if (le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS)
cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]);
trace_smb3_slow_rsp(le16_to_cpu(midEntry->command),
--
2.16.4