linux-kernel - Re: [PATCH v2 0/2] lib: checksum: Fix issues with checksum tests

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Date: Tue, 23 Jan 2024 15:22:30 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Charlie Jenkins <charlie@...osinc.com>,
 David Laight <David.Laight@...lab.com>, Palmer Dabbelt <palmer@...belt.com>
Cc: linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2 0/2] lib: checksum: Fix issues with checksum tests

On 1/23/24 13:58, Charlie Jenkins wrote:
> The ip_fast_csum and csum_ipv6_magic tests did not have the data
> types properly casted, and improperly misaligned data.
> 
> Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
> ---
> Changes in v2:
> - Add additional patch to fix alignment issues
> - Link to v1: https://lore.kernel.org/r/20240119-fix_sparse_errors_checksum_tests-v1-1-2d3df86d8d78@rivosinc.com
> 

I applied both patches but see the following.

     KTAP version 1
     # Subtest: checksum
     # module: checksum_kunit
     1..5
     ok 1 test_csum_fixed_random_inputs
     ok 2 test_csum_all_carry_inputs
     ok 3 test_csum_no_carry_inputs
     # test_ip_fast_csum: ASSERTION FAILED at lib/checksum_kunit.c:541
     Expected ( u64)csum_result == ( u64)expected, but
         ( u64)csum_result == 27015 (0x6987)
         ( u64)expected == 55912 (0xda68)
     not ok 4 test_ip_fast_csum
     # test_csum_ipv6_magic: ASSERTION FAILED at lib/checksum_kunit.c:564
     Expected ( u64)csum_result == ( u64)expected, but
         ( u64)csum_result == 42151 (0xa4a7)
         ( u64)expected == 5513 (0x1589)
     not ok 5 test_csum_ipv6_magic
# checksum: pass:3 fail:2 skip:0 total:5
# Totals: pass:3 fail:2 skip:0 total:5
not ok 17 checksum

Old result, before applying the patches (v6.8-rc1):

     KTAP version 1
     # Subtest: checksum
     # module: checksum_kunit
     1..5
     ok 1 test_csum_fixed_random_inputs
     ok 2 test_csum_all_carry_inputs
     ok 3 test_csum_no_carry_inputs
     ok 4 test_ip_fast_csum
     ok 5 test_csum_ipv6_magic
# checksum: pass:5 fail:0 skip:0 total:5
# Totals: pass:5 fail:0 skip:0 total:5
ok 17 checksum

This is with the imx25-pdk emulation in qemu.

Guenter