linux-kernel - Re: [PATCH bpf v4] net/xdp: fix zero-size allocation warning in xskq

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Message-Id: <169686122358.13891.1040766174680237802.git-patchwork-notify@kernel.org>
Date:   Mon, 09 Oct 2023 14:20:23 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Andrew Kanner <andrew.kanner@...il.com>
Cc:     martin.lau@...ux.dev, bjorn@...nel.org, magnus.karlsson@...el.com,
        maciej.fijalkowski@...el.com, jonathan.lemon@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, aleksander.lobakin@...el.com,
        xuanzhuo@...ux.alibaba.com, ast@...nel.org, hawk@...nel.org,
        john.fastabend@...il.com, daniel@...earbox.net,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+fae676d3cf469331fc89@...kaller.appspotmail.com,
        syzbot+b132693e925cbbd89e26@...kaller.appspotmail.com
Subject: Re: [PATCH bpf v4] net/xdp: fix zero-size allocation warning in
 xskq_create()

Hello:

This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Sat,  7 Oct 2023 10:51:49 +0300 you wrote:
> Syzkaller reported the following issue:
>  ------------[ cut here ]------------
>  WARNING: CPU: 0 PID: 2807 at mm/vmalloc.c:3247 __vmalloc_node_range (mm/vmalloc.c:3361)
>  Modules linked in:
>  CPU: 0 PID: 2807 Comm: repro Not tainted 6.6.0-rc2+ #12
>  Hardware name: Generic DT based system
>  unwind_backtrace from show_stack (arch/arm/kernel/traps.c:258)
>  show_stack from dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
>  dump_stack_lvl from __warn (kernel/panic.c:633 kernel/panic.c:680)
>  __warn from warn_slowpath_fmt (./include/linux/context_tracking.h:153 kernel/panic.c:700)
>  warn_slowpath_fmt from __vmalloc_node_range (mm/vmalloc.c:3361 (discriminator 3))
>  __vmalloc_node_range from vmalloc_user (mm/vmalloc.c:3478)
>  vmalloc_user from xskq_create (net/xdp/xsk_queue.c:40)
>  xskq_create from xsk_setsockopt (net/xdp/xsk.c:953 net/xdp/xsk.c:1286)
>  xsk_setsockopt from __sys_setsockopt (net/socket.c:2308)
>  __sys_setsockopt from ret_fast_syscall (arch/arm/kernel/entry-common.S:68)
> 
> [...]

Here is the summary with links:
  - [bpf,v4] net/xdp: fix zero-size allocation warning in xskq_create()
    https://git.kernel.org/bpf/bpf/c/a12bbb3cccf0

You are awesome, thank you!
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