Re: [PATCH] selftests/bpf: Fix incorrect parameters in NULL pointer checking

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Hi Dan and Alexei


I apologize for any inconvenience my mistake may have caused to both of you.


On 8/22/24 06:31, Dan Carpenter wrote:
On Wed, Aug 21, 2024 at 03:07:27PM -0700, Alexei Starovoitov wrote:
On Wed, Aug 21, 2024 at 2:50 PM Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
On Wed, Aug 21, 2024 at 02:03:17PM -0700, Yonghong Song wrote:
On 8/19/24 7:34 PM, Hao Ge wrote:
From: Hao Ge <gehao@xxxxxxxxxx>

Smatch reported the following warning:
      ./tools/testing/selftests/bpf/testing_helpers.c:455 get_xlated_program()
      warn: variable dereferenced before check 'buf' (see line 454)

It seems correct,so let's modify it based on it's suggestion.

Actually,commit b23ed4d74c4d ("selftests/bpf: Fix invalid pointer
check in get_xlated_program()") fixed an issue in the test_verifier.c
once,but it was reverted this time.

Let's solve this issue with the minimal changes possible.

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/1eb3732f-605a-479d-ba64-cd14250cbf91@stanley.mountain/
Fixes: b4b7a4099b8c ("selftests/bpf: Factor out get_xlated_program() helper")
Signed-off-by: Hao Ge <gehao@xxxxxxxxxx>
In the future, please change subject '[PATCH] ...' to '[PATCH bpf-next] ...'
so CI can properly test it.
It feels like there should be a technical solution to this.  The CI system is
something on AWS and it's too expensive to just check every patch that's sent to
the bpf list?  My understanding is that there are only two bpf trees.

         if [ "$FIXES_HASH" == "" ] ; then
                 TREE=next
         elif git merge-base --is-ancestor $FIXES_HASH origin/master ; then
                 TREE=linus
         else
                 TREE=next
         fi

These days the zero day bot people are checking around a thousand git trees.
They pull emails off the various lists and apply them to the right places.  It's
a doable thing.
Dan,

Various people pointed out that you need to use the proper subject in
the patches.
You clearly knew that rule and yet you ignored it,
and worse still you keep coming up with these excuses.
Don't be surprised that people who are supposed to review your patches
will take a long time to reply or "forget" about them as you "forget"
about patch submission rules.


Perhaps it was referring to me? Regardless, I will reflect on myself and make improvements.


You're emailing the wrong person.  This isn't my patch.  I don't send BPF
patches.

regards,
dan carpenter




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