netdev - Re: [PATCH net-next] bpf: fix a possible NULL deref in bpf_map_offload_map

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Message-Id: 
 <174140524498.2565853.1890386523722103613.git-patchwork-notify@kernel.org>
Date: Sat, 08 Mar 2025 03:40:44 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, sdf@...ichev.me,
 horms@...nel.org, netdev@...r.kernel.org, eric.dumazet@...il.com,
 syzbot+0c7bfd8cf3aecec92708@...kaller.appspotmail.com
Subject: Re: [PATCH net-next] bpf: fix a possible NULL deref in
 bpf_map_offload_map_alloc()

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Fri,  7 Mar 2025 07:43:02 +0000 you wrote:
> Call bpf_dev_offload_check() before netdev_lock_ops().
> 
> This is needed if attr->map_ifindex is not valid.
> 
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000197: 0000 [#1] PREEMPT SMP KASAN PTI
> KASAN: null-ptr-deref in range [0x0000000000000cb8-0x0000000000000cbf]
>  RIP: 0010:netdev_need_ops_lock include/linux/netdevice.h:2792 [inline]
>  RIP: 0010:netdev_lock_ops include/linux/netdevice.h:2803 [inline]
>  RIP: 0010:bpf_map_offload_map_alloc+0x19a/0x910 kernel/bpf/offload.c:533
> Call Trace:
>  <TASK>
>   map_create+0x946/0x11c0 kernel/bpf/syscall.c:1455
>   __sys_bpf+0x6d3/0x820 kernel/bpf/syscall.c:5777
>   __do_sys_bpf kernel/bpf/syscall.c:5902 [inline]
>   __se_sys_bpf kernel/bpf/syscall.c:5900 [inline]
>   __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5900
>   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>   do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> 
> [...]

Here is the summary with links:
  - [net-next] bpf: fix a possible NULL deref in bpf_map_offload_map_alloc()
    https://git.kernel.org/netdev/net-next/c/0a5c8b2c8ccb

You are awesome, thank you!
-- 
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