linux-kernel - Re: [PATCH 5.4 21/43] selftests/bpf: Add test for bpf

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Date:   Mon, 21 Mar 2022 13:46:40 +0100
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@...ia.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "sashal@...nel.org" <sashal@...nel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "memxor@...il.com" <memxor@...il.com>,
        "ast@...nel.org" <ast@...nel.org>
Subject: Re: [PATCH 5.4 21/43] selftests/bpf: Add test for bpf_timer
 overwriting crash

On Fri, Mar 18, 2022 at 07:27:07AM +0000, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> On Mon, 2022-03-14 at 12:53 +0100, Greg Kroah-Hartman wrote:
> > From: Kumar Kartikeya Dwivedi <memxor@...il.com>
> > 
> > [ Upstream commit a7e75016a0753c24d6c995bc02501ae35368e333 ]
> > 
> > Add a test that validates that timer value is not overwritten when doing
> > a copy_map_value call in the kernel. Without the prior fix, this test
> > triggers a crash.
> > 
> > Signed-off-by: Kumar Kartikeya Dwivedi <memxor@...il.com>
> > Signed-off-by: Alexei Starovoitov <ast@...nel.org>
> > Link: https://lore.kernel.org/bpf/20220209070324.1093182-3-memxor@gmail.com
> > Signed-off-by: Sasha Levin <sashal@...nel.org>
> 
> Hi, this patch in 5.4.185 breaks bpf selftests build for me:
> 
>   progs/timer_crash.c:3:10: fatal error: 'vmlinux.h' file not found
>   #include <vmlinux.h>
>            ^~~~~~~~~~~
> 
> Based on quick look, vmlinux.h generation was added to selftests in v5.7,
> so drop this patch in v5.4?

Now reverted, thanks!

greg k-h