netdev - Re: [PATCH v2] usbnet: Fix using smp_processor

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Message-Id: 
 <176043660626.3630052.547487952463753685.git-patchwork-notify@kernel.org>
Date: Tue, 14 Oct 2025 10:10:06 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Zqiang <qiang.zhang@...ux.dev>
Cc: oneukum@...e.com, andrew+netdev@...n.ch, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 netdev@...r.kernel.org
Subject: Re: [PATCH v2] usbnet: Fix using smp_processor_id() in preemptible
 code
 warnings

Hello:

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

On Sat, 11 Oct 2025 15:05:18 +0800 you wrote:
> Syzbot reported the following warning:
> 
> BUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/2879
> caller is usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331
> CPU: 1 UID: 0 PID: 2879 Comm: dhcpcd Not tainted 6.15.0-rc4-syzkaller-00098-g615dca38c2ea #0 PREEMPT(voluntary)
> Call Trace:
>  <TASK>
>  __dump_stack lib/dump_stack.c:94 [inline]
>  dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
>  check_preemption_disabled+0xd0/0xe0 lib/smp_processor_id.c:49
>  usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331
>  usbnet_resume_rx+0x4b/0x170 drivers/net/usb/usbnet.c:708
>  usbnet_change_mtu+0x1be/0x220 drivers/net/usb/usbnet.c:417
>  __dev_set_mtu net/core/dev.c:9443 [inline]
>  netif_set_mtu_ext+0x369/0x5c0 net/core/dev.c:9496
>  netif_set_mtu+0xb0/0x160 net/core/dev.c:9520
>  dev_set_mtu+0xae/0x170 net/core/dev_api.c:247
>  dev_ifsioc+0xa31/0x18d0 net/core/dev_ioctl.c:572
>  dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821
>  sock_do_ioctl+0x19d/0x280 net/socket.c:1204
>  sock_ioctl+0x42f/0x6a0 net/socket.c:1311
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:906 [inline]
>  __se_sys_ioctl fs/ioctl.c:892 [inline]
>  __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
>  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
>  do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> 
> [...]

Here is the summary with links:
  - [v2] usbnet: Fix using smp_processor_id() in preemptible code warnings
    https://git.kernel.org/netdev/net/c/327cd4b68b43

You are awesome, thank you!
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