linux-kernel - [PATCH] crypto: cavium - Fix the if condition to exit loop after timeout

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241018162311.4770-1-everestkc@everestkc.com.np>
Date: Fri, 18 Oct 2024 10:23:10 -0600
From: "Everest K.C." <everestkc@...restkc.com.np>
To: gcherian@...vell.com,
	herbert@...dor.apana.org.au,
	davem@...emloft.net
Cc: "Everest K.C." <everestkc@...restkc.com.np>,
	skhan@...uxfoundation.org,
	linux-crypto@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: cavium - Fix the if condition to exit loop after timeout

The while loop breaks in the first run because of incorrect
if condition. It also causes the statements after the if to
appear dead.
Fix this by changing the condition from if(timeout--) to
if(!timeout--).

This bug was reported by Coverity Scan.
Report:
CID 1600859: (#1 of 1): Logically dead code (DEADCODE)
dead_error_line: Execution cannot reach this statement: udelay(30UL);

Fixes: 9e2c7d99941d ("crypto: cavium - Add Support for Octeon-tx CPT Engine")
Signed-off-by: Everest K.C. <everestkc@...restkc.com.np>
---
 drivers/crypto/cavium/cpt/cptpf_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/cavium/cpt/cptpf_main.c b/drivers/crypto/cavium/cpt/cptpf_main.c
index 6872ac344001..ec17beee24c0 100644
--- a/drivers/crypto/cavium/cpt/cptpf_main.c
+++ b/drivers/crypto/cavium/cpt/cptpf_main.c
@@ -44,7 +44,7 @@ static void cpt_disable_cores(struct cpt_device *cpt, u64 coremask,
 		dev_err(dev, "Cores still busy %llx", coremask);
 		grp = cpt_read_csr64(cpt->reg_base,
 				     CPTX_PF_EXEC_BUSY(0));
-		if (timeout--)
+		if (!timeout--)
 			break;
 
 		udelay(CSR_DELAY);
@@ -394,7 +394,7 @@ static void cpt_disable_all_cores(struct cpt_device *cpt)
 		dev_err(dev, "Cores still busy");
 		grp = cpt_read_csr64(cpt->reg_base,
 				     CPTX_PF_EXEC_BUSY(0));
-		if (timeout--)
+		if (!timeout--)
 			break;
 
 		udelay(CSR_DELAY);
-- 
2.43.0