Date: Fri, 4 Apr 2003 00:01:08 -0800 (PST) From: Nate Lawson <nate@root.org> To: current@freebsd.org Subject: MPSAFE fxp m_pkthdr not valid Message-ID: <Pine.BSF.4.21.0304032356590.15815-100000@root.org>
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I have gotten fxp running with MPSAFE and did a large scp transfer. It
ran for a few minutes and then paniced. It was trap 12 (page fault) at
address 0x24. Here is where it crashed:
fxp_start+0xcc
0xc0194a4c is in fxp_start (../../../dev/fxp/if_fxp.c:1263).
1258 * been computed and stored in the checksum field
1259 * in the TCP header. The stack should have
1260 * already done this for us.
1261 */
1262
1263 if (mb_head->m_pkthdr.csum_flags) {
1264 if (mb_head->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
1265 txp->tx_cb->ipcb_ip_activation_high =
1266 FXP_IPCB_HARDWAREPARSING_ENABLE;
1267 txp->tx_cb->ipcb_ip_schedule =
The deref of mb_head->m_pkthdr is invalid. Note that my fxp_intr function
acquires the fxp lock right away so this shouldn't be a race in fxp.
There is still the slab_zalloc LOR which I will describe further in another
email.
-Nate
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