Re: [net v3] net: wwan: t7xx: Fix napi rx poll issue
From: patchwork-bot+netdevbpf@kernel.org
Date: 2025-06-03 08:59:55
Also in:
linux-arm-kernel, linux-doc, linux-mediatek, lkml
From: patchwork-bot+netdevbpf@kernel.org
Date: 2025-06-03 08:59:55
Also in:
linux-arm-kernel, linux-doc, linux-mediatek, lkml
Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni [off-list ref]: On Fri, 30 May 2025 11:16:48 +0800 you wrote:
When driver handles the napi rx polling requests, the netdev might have been released by the dellink logic triggered by the disconnect operation on user plane. However, in the logic of processing skb in polling, an invalid netdev is still being used, which causes a panic. BUG: kernel NULL pointer dereference, address: 00000000000000f1 Oops: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:dev_gro_receive+0x3a/0x620 [...] Call Trace: <IRQ> ? __die_body+0x68/0xb0 ? page_fault_oops+0x379/0x3e0 ? exc_page_fault+0x4f/0xa0 ? asm_exc_page_fault+0x22/0x30 ? __pfx_t7xx_ccmni_recv_skb+0x10/0x10 [mtk_t7xx (HASH:1400 7)] ? dev_gro_receive+0x3a/0x620 napi_gro_receive+0xad/0x170 t7xx_ccmni_recv_skb+0x48/0x70 [mtk_t7xx (HASH:1400 7)] t7xx_dpmaif_napi_rx_poll+0x590/0x800 [mtk_t7xx (HASH:1400 7)] net_rx_action+0x103/0x470 irq_exit_rcu+0x13a/0x310 sysvec_apic_timer_interrupt+0x56/0x90 </IRQ> [...]
Here is the summary with links:
- [net,v3] net: wwan: t7xx: Fix napi rx poll issue
https://git.kernel.org/netdev/net/c/905fe0845bb2
You are awesome, thank you!
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