linux-kernel - Re: [PATCH RESEND] ptp: Fixes a null pointer dereference in ptp

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Date:   Fri, 10 Nov 2023 08:40:28 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Yuran Pereira <yuran.pereira@...mail.com>
Cc:     richardcochran@...il.com, netdev@...r.kernel.org, eadavis@...com,
        davem@...emloft.net, reibax@...il.com,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        syzbot+8a78ecea7ac1a2ea26e5@...kaller.appspotmail.com
Subject: Re: [PATCH RESEND] ptp: Fixes a null pointer dereference in ptp_ioctl

Hello:

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

On Wed,  8 Nov 2023 02:18:36 +0530 you wrote:
> Syzkaller found a null pointer dereference in ptp_ioctl
> originating from the lack of a null check for tsevq.
> 
> ```
> general protection fault, probably for non-canonical
> 	address 0xdffffc000000020b: 0000 [#1] PREEMPT SMP KASAN
> KASAN: probably user-memory-access in range
> 	[0x0000000000001058-0x000000000000105f]
> CPU: 0 PID: 5053 Comm: syz-executor353 Not tainted
> 	6.6.0-syzkaller-10396-g4652b8e4f3ff #0
> Hardware name: Google Google Compute Engine/Google Compute Engine,
> 	BIOS Google 10/09/2023
> RIP: 0010:ptp_ioctl+0xcb7/0x1d10 drivers/ptp/ptp_chardev.c:476
> ...
> Call Trace:
>  <TASK>
>  posix_clock_ioctl+0xf8/0x160 kernel/time/posix-clock.c:86
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:871 [inline]
>  __se_sys_ioctl fs/ioctl.c:857 [inline]
>  __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
>  do_syscall_x64 arch/x86/entry/common.c:51 [inline]
>  do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
>  entry_SYSCALL_64_after_hwframe+0x63/0x6b
> ```
> 
> [...]

Here is the summary with links:
  - [RESEND] ptp: Fixes a null pointer dereference in ptp_ioctl
    https://git.kernel.org/netdev/net/c/8a4f030dbced

You are awesome, thank you!
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