2023-01-03 14:39:14

by Florian Westphal

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Subject: Re: PROBLEM: Hang in selftests/netfilter/nft_trans_stress.sh

Mirsad Goran Todorovac <[email protected]> wrote:
> Hi all,
>
> The `make kselftest` hangs in netfilter/nft_trans_stress.sh test when testing 6.2.0-rc2
> (attempted 2 times, waiting half an hour at least):

This script completes in 49 seconds for me.

> # selftests: netfilter: nft_trans_stress.sh
> # PASS: nft add/delete test returned 0
> # PASS: nft reload test returned 0
>
> The test script seems to be stuck in ping flood:

No, it gets stuck in the sub-test after 'PASS: nft reload test returned 0'

Can you send me the output of 'bash -x nft_trans_stress.sh'?
It should tell which command/program isn't making progress.


2023-01-03 15:53:14

by Mirsad Todorovac

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Subject: Re: PROBLEM: Hang in selftests/netfilter/nft_trans_stress.sh

On 03. 01. 2023. 15:28, Florian Westphal wrote:
> Mirsad Goran Todorovac <[email protected]> wrote:
>> Hi all,
>>
>> The `make kselftest` hangs in netfilter/nft_trans_stress.sh test when testing 6.2.0-rc2
>> (attempted 2 times, waiting half an hour at least):
>
> This script completes in 49 seconds for me.
>
>> # selftests: netfilter: nft_trans_stress.sh
>> # PASS: nft add/delete test returned 0
>> # PASS: nft reload test returned 0
>>
>> The test script seems to be stuck in ping flood:
>
> No, it gets stuck in the sub-test after 'PASS: nft reload test returned 0'
>
> Can you send me the output of 'bash -x nft_trans_stress.sh'?
> It should tell which command/program isn't making progress.

Hi, Florian!

Well, when ran alone, the script ended successfully:

root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter# bash nft_trans_stress.sh
PASS: nft add/delete test returned 0
PASS: nft reload test returned 0
PASS: nft add/delete with nftrace enabled test returned 0
PASS: nft add/delete with nftrace enabled test returned 0
root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter#

There was no stall after "nft reload test" in a standalone superuser run.

Hope this helps.

Kind regards,
Mirsad

--
Mirsad Goran Todorovac
Sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
--
System engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
The European Union

2023-01-03 16:36:10

by Florian Westphal

[permalink] [raw]
Subject: Re: PROBLEM: Hang in selftests/netfilter/nft_trans_stress.sh

Mirsad Goran Todorovac <[email protected]> wrote:
> > Can you send me the output of 'bash -x nft_trans_stress.sh'?
> > It should tell which command/program isn't making progress.
>
> Hi, Florian!
>
> Well, when ran alone, the script ended successfully:
>
> root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter# bash nft_trans_stress.sh
> PASS: nft add/delete test returned 0
> PASS: nft reload test returned 0
> PASS: nft add/delete with nftrace enabled test returned 0
> PASS: nft add/delete with nftrace enabled test returned 0
> root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter#
>
> There was no stall after "nft reload test" in a standalone superuser run.

Hmm. Does this patch make it work when running via 'make kselftest'?

diff --git a/tools/testing/selftests/netfilter/nft_trans_stress.sh b/tools/testing/selftests/netfilter/nft_trans_stress.sh
--- a/tools/testing/selftests/netfilter/nft_trans_stress.sh
+++ b/tools/testing/selftests/netfilter/nft_trans_stress.sh
@@ -10,12 +10,20 @@
ksft_skip=4

testns=testns-$(mktemp -u "XXXXXXXX")
+tmp=""

tables="foo bar baz quux"
global_ret=0
eret=0
lret=0

+cleanup() {
+ ip netns pids "$testns" | xargs kill 2>/dev/null
+ ip netns del "$testns"
+
+ rm -f "$tmp"
+}
+
check_result()
{
local r=$1
@@ -43,6 +51,7 @@ if [ $? -ne 0 ];then
exit $ksft_skip
fi

+trap cleanup EXIT
tmp=$(mktemp)

for table in $tables; do
@@ -139,11 +148,4 @@ done

check_result $lret "add/delete with nftrace enabled"

-pkill -9 ping
-
-wait
-
-rm -f "$tmp"
-ip netns del "$testns"
-
exit $global_ret

2023-01-03 21:59:09

by Mirsad Todorovac

[permalink] [raw]
Subject: Re: PROBLEM: Hang in selftests/netfilter/nft_trans_stress.sh

On 03. 01. 2023. 17:11, Florian Westphal wrote:
> Mirsad Goran Todorovac <[email protected]> wrote:
>>> Can you send me the output of 'bash -x nft_trans_stress.sh'?
>>> It should tell which command/program isn't making progress.
>>
>> Hi, Florian!
>>
>> Well, when ran alone, the script ended successfully:
>>
>> root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter# bash nft_trans_stress.sh
>> PASS: nft add/delete test returned 0
>> PASS: nft reload test returned 0
>> PASS: nft add/delete with nftrace enabled test returned 0
>> PASS: nft add/delete with nftrace enabled test returned 0
>> root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter#
>>
>> There was no stall after "nft reload test" in a standalone superuser run.
>
> Hmm. Does this patch make it work when running via 'make kselftest'?
>
> diff --git a/tools/testing/selftests/netfilter/nft_trans_stress.sh b/tools/testing/selftests/netfilter/nft_trans_stress.sh
> --- a/tools/testing/selftests/netfilter/nft_trans_stress.sh
> +++ b/tools/testing/selftests/netfilter/nft_trans_stress.sh
> @@ -10,12 +10,20 @@
> ksft_skip=4
>
> testns=testns-$(mktemp -u "XXXXXXXX")
> +tmp=""
>
> tables="foo bar baz quux"
> global_ret=0
> eret=0
> lret=0
>
> +cleanup() {
> + ip netns pids "$testns" | xargs kill 2>/dev/null
> + ip netns del "$testns"
> +
> + rm -f "$tmp"
> +}
> +
> check_result()
> {
> local r=$1
> @@ -43,6 +51,7 @@ if [ $? -ne 0 ];then
> exit $ksft_skip
> fi
>
> +trap cleanup EXIT
> tmp=$(mktemp)
>
> for table in $tables; do
> @@ -139,11 +148,4 @@ done
>
> check_result $lret "add/delete with nftrace enabled"
>
> -pkill -9 ping
> -
> -wait
> -
> -rm -f "$tmp"
> -ip netns del "$testns"
> -
> exit $global_ret

I've got the following output:

make[2]: Entering directory '/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter'
TAP version 13
1..17
# selftests: netfilter: nft_trans_stress.sh
# PASS: nft add/delete test returned 0
# PASS: nft reload test returned 0
#
not ok 1 selftests: netfilter: nft_trans_stress.sh # TIMEOUT 45 seconds
# selftests: netfilter: nft_fib.sh
# PASS: fib expression did not cause unwanted packet drops

It did not hang, but still did not finish all 4 tests correctly like when ran standalone:

root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter# time ./nft_trans_stress.sh
PASS: nft add/delete test returned 0
PASS: nft reload test returned 0
PASS: nft add/delete with nftrace enabled test returned 0
PASS: nft add/delete with nftrace enabled test returned 0

real 1m11.014s
user 0m6.470s
sys 0m20.344s
root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/netfilter#

I hope we're closer to the solution.

Kind regards,
Mirsad

--
Mirsad Goran Todorovac
Sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
--
System engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
The European Union