svn commit: r329941 - head/sys/powerpc/ps3
Nathan Whitehorn
nwhitehorn at FreeBSD.org
Sat Feb 24 22:34:57 UTC 2018
Author: nwhitehorn
Date: Sat Feb 24 22:34:56 2018
New Revision: 329941
URL: https://svnweb.freebsd.org/changeset/base/329941
Log:
Avoid dereferencing random memory when kickstarting DMA.
MFC after: 1 week
Modified:
head/sys/powerpc/ps3/if_glc.c
Modified: head/sys/powerpc/ps3/if_glc.c
==============================================================================
--- head/sys/powerpc/ps3/if_glc.c Sat Feb 24 21:28:05 2018 (r329940)
+++ head/sys/powerpc/ps3/if_glc.c Sat Feb 24 22:34:56 2018 (r329941)
@@ -832,7 +832,8 @@ glc_txintr(struct glc_softc *sc)
/* Speculatively (or necessarily) start the TX queue again */
error = lv1_net_start_tx_dma(sc->sc_bus, sc->sc_dev,
sc->sc_txdmadesc_phys +
- txs->txs_firstdesc*sizeof(struct glc_dmadesc), 0);
+ ((txs == NULL) ? 0 : txs->txs_firstdesc)*
+ sizeof(struct glc_dmadesc), 0);
if (error != 0)
device_printf(sc->sc_self,
"lv1_net_start_tx_dma error: %d\n", error);
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