| Message ID | 20240411114434.26186-4-paul.barker.ct@bp.renesas.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | ravb Ethernet driver bugfixes | expand |
On 4/11/24 2:44 PM, Paul Barker wrote: > Sending a 7kB ping packet to the RZ/G2L in Linux v6.9-rc2 causes the > following backtrace: > > WARNING: CPU: 0 PID: 0 at include/linux/skbuff.h:3127 skb_trim+0x30/0x38 > Modules linked in: > CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.9.0-rc1-00222-gde11614025b1 #3 > Hardware name: Renesas SMARC EVK based on r9a07g044l2 (DT) > pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : skb_trim+0x30/0x38 > lr : ravb_rx_csum_gbeth+0x40/0x90 > sp : ffff800080003d40 > x29: ffff800080003d40 x28: 0000000000000400 x27: ffff00000d0f0000 > x26: 0000000000000001 x25: ffff800080003e84 x24: 0000000000000e52 > x23: 0000000000000000 x22: ffff00000d0f0960 x21: 000000000000ffff > x20: 000000000000f6ff x19: ffff00000cf4cb00 x18: 0000000000000000 > x17: ffff7ffffdd4f000 x16: ffff800080000000 x15: e7e6e5e4e3e2e1e0 > x14: dfdedddcdbdad9d8 x13: 0000131211100f0e x12: 0d0c0b0a09080706 > x11: 0000000013121110 x10: 0000000000000000 x9 : 0000000000000001 > x8 : ffff800080003cf0 x7 : 0000000000000000 x6 : ffff00007faf4590 > x5 : 000000000010000b x4 : a1a8362deecb53ea x3 : 0000000000000080 > x2 : 00000000ffff0000 x1 : 000000000cf4ccfc x0 : ffff00000cf4cb00 > Call trace: > skb_trim+0x30/0x38 > ravb_rx_gbeth+0x56c/0x5cc > ravb_poll+0xa0/0x204 > __napi_poll+0x38/0x17c > net_rx_action+0x124/0x268 > __do_softirq+0x100/0x26c > ____do_softirq+0x10/0x1c > call_on_irq_stack+0x24/0x4c > do_softirq_own_stack+0x1c/0x2c > irq_exit_rcu+0xbc/0xd8 > el1_interrupt+0x38/0x68 > el1h_64_irq_handler+0x18/0x24 > el1h_64_irq+0x64/0x68 > default_idle_call+0x28/0x3c > do_idle+0x204/0x25c > cpu_startup_entry+0x38/0x3c > kernel_init+0x0/0x1d8 > start_kernel+0x504/0x5f0 > __primary_switched+0x80/0x88 > ---[ end trace 0000000000000000 ]--- > > This is caused by ravb_rx_gbeth() calling ravb_rx_csum_gbeth() with the > wrong skb for a packet which spans multiple descriptors. To fix this, > use the correct skb. > > Fixes: c2da9408579d ("ravb: Add Rx checksum offload support for GbEth") > Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com> Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru> [...] MBR, Sergey
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 028ab5c6aaf7..e1e39f65224c 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -843,7 +843,7 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q) priv->rx_1st_skb->protocol = eth_type_trans(priv->rx_1st_skb, ndev); if (ndev->features & NETIF_F_RXCSUM) - ravb_rx_csum_gbeth(skb); + ravb_rx_csum_gbeth(priv->rx_1st_skb); napi_gro_receive(&priv->napi[q], priv->rx_1st_skb); rx_packets++;
Sending a 7kB ping packet to the RZ/G2L in Linux v6.9-rc2 causes the following backtrace: WARNING: CPU: 0 PID: 0 at include/linux/skbuff.h:3127 skb_trim+0x30/0x38 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.9.0-rc1-00222-gde11614025b1 #3 Hardware name: Renesas SMARC EVK based on r9a07g044l2 (DT) pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_trim+0x30/0x38 lr : ravb_rx_csum_gbeth+0x40/0x90 sp : ffff800080003d40 x29: ffff800080003d40 x28: 0000000000000400 x27: ffff00000d0f0000 x26: 0000000000000001 x25: ffff800080003e84 x24: 0000000000000e52 x23: 0000000000000000 x22: ffff00000d0f0960 x21: 000000000000ffff x20: 000000000000f6ff x19: ffff00000cf4cb00 x18: 0000000000000000 x17: ffff7ffffdd4f000 x16: ffff800080000000 x15: e7e6e5e4e3e2e1e0 x14: dfdedddcdbdad9d8 x13: 0000131211100f0e x12: 0d0c0b0a09080706 x11: 0000000013121110 x10: 0000000000000000 x9 : 0000000000000001 x8 : ffff800080003cf0 x7 : 0000000000000000 x6 : ffff00007faf4590 x5 : 000000000010000b x4 : a1a8362deecb53ea x3 : 0000000000000080 x2 : 00000000ffff0000 x1 : 000000000cf4ccfc x0 : ffff00000cf4cb00 Call trace: skb_trim+0x30/0x38 ravb_rx_gbeth+0x56c/0x5cc ravb_poll+0xa0/0x204 __napi_poll+0x38/0x17c net_rx_action+0x124/0x268 __do_softirq+0x100/0x26c ____do_softirq+0x10/0x1c call_on_irq_stack+0x24/0x4c do_softirq_own_stack+0x1c/0x2c irq_exit_rcu+0xbc/0xd8 el1_interrupt+0x38/0x68 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x64/0x68 default_idle_call+0x28/0x3c do_idle+0x204/0x25c cpu_startup_entry+0x38/0x3c kernel_init+0x0/0x1d8 start_kernel+0x504/0x5f0 __primary_switched+0x80/0x88 ---[ end trace 0000000000000000 ]--- This is caused by ravb_rx_gbeth() calling ravb_rx_csum_gbeth() with the wrong skb for a packet which spans multiple descriptors. To fix this, use the correct skb. Fixes: c2da9408579d ("ravb: Add Rx checksum offload support for GbEth") Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com> --- drivers/net/ethernet/renesas/ravb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)