git: 454601155778 - stable/13 - cxgbe(4): Fix potential integer overflow in t4_tstmp_to_ns.

The branch stable/13 has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=454601155778939f81ebcbfb4a876ddb793a2604

commit 454601155778939f81ebcbfb4a876ddb793a2604
Author:     Navdeep Parhar <np@FreeBSD.org>
AuthorDate: 2022-09-22 15:57:25 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2022-11-11 01:26:17 +0000

    cxgbe(4): Fix potential integer overflow in t4_tstmp_to_ns.
    
    Coverity flagged this in its latest run but it is not a problem in
    practice as the card's core clock would have to be > 4.2GHz for any
    overflow to occur.
    
    CID 1498303:  Integer handling issues  (OVERFLOW_BEFORE_WIDEN)
    Potentially overflowing expression "sc->params.vpd.cclk * 1000U" with type "unsigned int" (32 bits, unsigned) is evaluated using 32-bit arithmetic, and then used in a context that expects an expression of type "uint64_t" (64 bits, unsigned).
    
    Reported by:    Coverity Scan (CID 1498303)
    Sponsored by:   Chelsio Communications
    
    (cherry picked from commit 02fac928ab687607786801cdf33f100c70cc6a2e)
---
 sys/dev/cxgbe/t4_sge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c
index dd3d22020651..48d87be4e0b6 100644
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -1552,7 +1552,7 @@ t4_tstmp_to_ns(struct adapter *sc, uint64_t lf)
 	 * Note that vpd.cclk is in khz, we need it in raw hz so
 	 * convert to hz.
 	 */
-	cclk = sc->params.vpd.cclk * 1000;
+	cclk = (uint64_t)sc->params.vpd.cclk * 1000;
 	hw_clocks = hw_tstmp - dcur.hw_prev;
 	tstmp_sec = hw_clocks / cclk;
 	tstmp_nsec = hw_clocks % cclk;