linux-kernel - [PATCH 5.10 295/545] usb: host: xhci: use snprintf() in xhci_decode

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Message-Id: <20220819153842.539091144@linuxfoundation.org>
Date:   Fri, 19 Aug 2022 17:41:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sergey Shtylyov <s.shtylyov@....ru>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 295/545] usb: host: xhci: use snprintf() in xhci_decode_trb()

From: Sergey Shtylyov <s.shtylyov@....ru>

[ Upstream commit 1ce69c35b86038dd11d3a6115a04501c5b89a940 ]

Commit cbf286e8ef83 ("xhci: fix unsafe memory usage in xhci tracing")
apparently missed one sprintf() call in xhci_decode_trb() -- replace
it with the snprintf() call as well...

Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.

Fixes: cbf286e8ef83 ("xhci: fix unsafe memory usage in xhci tracing")
Signed-off-by: Sergey Shtylyov <s.shtylyov@....ru>
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Link: https://lore.kernel.org/r/20220630124645.1805902-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/host/xhci.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 0c66424b34ba..f87e5fe57f22 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -2383,7 +2383,7 @@ static inline const char *xhci_decode_trb(char *str, size_t size,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_STOP_RING:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: slot %d sp %d ep %d flags %c",
 			xhci_trb_type_string(type),
 			TRB_TO_SLOT_ID(field3),
-- 
2.35.1