linux-kernel - Re: [PATCH net v2] ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}

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Date: Thu, 30 May 2024 10:10:28 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Yue Haibing <yuehaibing@...wei.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, maheshb@...gle.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] ipvlan: Dont Use skb->sk in
 ipvlan_process_v{4,6}_outbound

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Wed, 29 May 2024 17:56:33 +0800 you wrote:
> Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will
> hit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.
> 
> WARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70
> Modules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper
> CPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
> RIP: 0010:sk_mc_loop+0x2d/0x70
> Code: fa 0f 1f 44 00 00 65 0f b7 15 f7 96 a3 4f 31 c0 66 85 d2 75 26 48 85 ff 74 1c
> RSP: 0018:ffffa9584015cd78 EFLAGS: 00010212
> RAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001
> RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000
> RBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00
> R10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000
> R13: ffff91e584fdcc68 R14: ffff91e5869ce800 R15: ffff91e589c0f000
> FS:  0000000000000000(0000) GS:ffff91e898100000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f788f7c44c0 CR3: 0000000008e1a000 CR4: 00000000000006f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <IRQ>
>  ? __warn (kernel/panic.c:693)
>  ? sk_mc_loop (net/core/sock.c:760)
>  ? report_bug (lib/bug.c:201 lib/bug.c:219)
>  ? handle_bug (arch/x86/kernel/traps.c:239)
>  ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))
>  ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
>  ? sk_mc_loop (net/core/sock.c:760)
>  ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))
>  ? nf_hook_slow (net/netfilter/core.c:626)
>  ip6_finish_output (net/ipv6/ip6_output.c:222)
>  ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)
>  ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan
>  ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan
>  dev_hard_start_xmit (net/core/dev.c:3594)
>  sch_direct_xmit (net/sched/sch_generic.c:343)
>  __qdisc_run (net/sched/sch_generic.c:416)
>  net_tx_action (net/core/dev.c:5286)
>  handle_softirqs (kernel/softirq.c:555)
>  __irq_exit_rcu (kernel/softirq.c:589)
>  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)
> 
> [...]

Here is the summary with links:
  - [net,v2] ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound
    https://git.kernel.org/netdev/net/c/b3dc6e8003b5

You are awesome, thank you!
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