From: Ingo Molnar <[EMAIL PROTECTED]>
work around a NULL skb dereference crash that occurs during high load.
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Cc: Ayaz Abdulla <[EMAIL PROTECTED]>
Cc: Jeff Garzik <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/net/forcedeth.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff -puN
drivers/net/forcedeth.c~forcedeth-work-around-null-skb-dereference-crash
drivers/net/forcedeth.c
--- a/drivers/net/forcedeth.c~forcedeth-work-around-null-skb-dereference-crash
+++ a/drivers/net/forcedeth.c
@@ -1902,6 +1902,16 @@ static void nv_tx_done(struct net_device
np->stats.tx_carrier_errors++;
np->stats.tx_errors++;
} else {
+ if (!np->get_tx_ctx->skb) {
+ printk("get_tx: %td, put_tx: "
+ "%td\n",
+ np->get_tx_ctx -
+ np->first_tx_ctx,
+ np->put_tx_ctx -
+ np->first_tx_ctx);
+ WARN_ON(1);
+ break;
+ }
np->stats.tx_packets++;
np->stats.tx_bytes +=
np->get_tx_ctx->skb->len;
}
@@ -1917,6 +1927,16 @@ static void nv_tx_done(struct net_device
np->stats.tx_carrier_errors++;
np->stats.tx_errors++;
} else {
+ if (!np->get_tx_ctx->skb) {
+ printk("get_tx: %td, put_tx: "
+ "%td\n",
+ np->get_tx_ctx -
+ np->first_tx_ctx,
+ np->put_tx_ctx -
+ np->first_tx_ctx);
+ WARN_ON(1);
+ break;
+ }
np->stats.tx_packets++;
np->stats.tx_bytes +=
np->get_tx_ctx->skb->len;
}
_
-
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