Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check

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Subject: Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
From: Eduard Zingerman <eddyz87@xxxxxxxxx>
Date: Wed, 11 Jun 2025 14:43:00 -0700
Cc: andrii@xxxxxxxxxx, ast@xxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, daniel@xxxxxxxxxxxxx, haoluo@xxxxxxxxxx, john.fastabend@xxxxxxxxx, jolsa@xxxxxxxxxx, kpsingh@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, martin.lau@xxxxxxxxx, sdf@xxxxxxxxxxx, song@xxxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx, yonghong.song@xxxxxxxxx
In-reply-to: <87plfa3qxi.fsf@fau.de>
User-agent: Evolution 3.56.2 (3.56.2-1.fc42)

On Wed, 2025-06-11 at 23:32 +0200, Luis Gerhorst wrote:

[...]

> I sent the fix [1], let me know if it is as desired.

Thank you for the patches, I'll take a look shortly.
For now I asked syzbot to test "bpf: Fix state use-after-free on push_stack() err"
(hope I did it correctly).

[...]

References:
- [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
  - From: syzbot
- Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
  - From: Eduard Zingerman
- Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
  - From: Luis Gerhorst
- Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
  - From: Eduard Zingerman
- Re: [syzbot] [bpf?] KASAN: slab-use-after-free Read in do_check
  - From: Luis Gerhorst

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