linux-kernel - Re: [PATCH net v2] pktgen: Avoid out-of-bounds access in get_imix

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Message-Id: 
 <173675943251.3415908.7564815246317322659.git-patchwork-notify@kernel.org>
Date: Mon, 13 Jan 2025 09:10:32 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Fedor Pchelkin <pchelkin@...ras.ru>
Cc: kuba@...nel.org, davem@...emloft.net, edumazet@...gle.com,
 pabeni@...hat.com, horms@...nel.org, artem.chernyshev@...-soft.ru,
 richardsonnick@...gle.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH net v2] pktgen: Avoid out-of-bounds access in get_imix_entries

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Thu,  9 Jan 2025 11:30:39 +0300 you wrote:
> From: Artem Chernyshev <artem.chernyshev@...-soft.ru>
> 
> Passing a sufficient amount of imix entries leads to invalid access to the
> pkt_dev->imix_entries array because of the incorrect boundary check.
> 
> UBSAN: array-index-out-of-bounds in net/core/pktgen.c:874:24
> index 20 is out of range for type 'imix_pkt [20]'
> CPU: 2 PID: 1210 Comm: bash Not tainted 6.10.0-rc1 #121
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
> Call Trace:
> <TASK>
> dump_stack_lvl lib/dump_stack.c:117
> __ubsan_handle_out_of_bounds lib/ubsan.c:429
> get_imix_entries net/core/pktgen.c:874
> pktgen_if_write net/core/pktgen.c:1063
> pde_write fs/proc/inode.c:334
> proc_reg_write fs/proc/inode.c:346
> vfs_write fs/read_write.c:593
> ksys_write fs/read_write.c:644
> do_syscall_64 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:130
> 
> [...]

Here is the summary with links:
  - [net,v2] pktgen: Avoid out-of-bounds access in get_imix_entries
    https://git.kernel.org/netdev/net/c/76201b597976

You are awesome, thank you!
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