Greeting,

FYI, we noticed igt.gem_userptr_blits.probe.fail due to commit (built with gcc-11):

commit: f683b9d613193362ceb954c216f663a43c027302 ("i915: use the VMA iterator")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: igt
version: igt-x86_64-cf55acde-1_20221012
with following parameters:

	group: group-13



on test machine: 20 threads 1 sockets (Commet Lake) with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Link: https://lore.kernel.org/r/202210241246.68be2f11-oliver.sang@intel.com



2022-10-24 03:27:39 build/tests/gem_userptr_blits --run-subtest probe
IGT-Version: 1.26-gcf55acde (x86_64) (Linux: 6.0.0-rc3-00280-gf683b9d61319 x86_64)
Aperture size is 268435456 MiB
Total RAM is 13505 MiB
Not enough RAM to run test, reducing buffer count.
Test requirement not met in function __igt_unique____real_main2320, file ../tests/i915/gem_userptr_blits.c:2401:
Test requirement: has_userptr(fd)
Starting subtest: probe
(gem_userptr_blits:1984) CRITICAL: Test assertion failure function test_probe, file ../tests/i915/gem_userptr_blits.c:2231:
(gem_userptr_blits:1984) CRITICAL: Failed assertion: __gem_userptr(fd, ptr + 4096, 3*4096, 0, 0x2, &handle) == expected
(gem_userptr_blits:1984) CRITICAL: Last errno: 14, Bad address
(gem_userptr_blits:1984) CRITICAL: error: 0 != -14
Subtest probe failed.
**** DEBUG ****
(gem_userptr_blits:1984) DEBUG: Test requirement passed: has_userptr_probe(fd)
(gem_userptr_blits:1984) CRITICAL: Test assertion failure function test_probe, file ../tests/i915/gem_userptr_blits.c:2231:
(gem_userptr_blits:1984) CRITICAL: Failed assertion: __gem_userptr(fd, ptr + 4096, 3*4096, 0, 0x2, &handle) == expected
(gem_userptr_blits:1984) CRITICAL: Last errno: 14, Bad address
(gem_userptr_blits:1984) CRITICAL: error: 0 != -14
(gem_userptr_blits:1984) igt_core-INFO: Stack trace:
(gem_userptr_blits:1984) igt_core-INFO:   #0 [__igt_fail_assert+0x106]
(gem_userptr_blits:1984) igt_core-INFO:   #1 ../tests/i915/gem_userptr_blits.c:801 __igt_unique____real_main2320()
(gem_userptr_blits:1984) igt_core-INFO:   #2 ../tests/i915/gem_userptr_blits.c:2320 main()
(gem_userptr_blits:1984) igt_core-INFO:   #3 ../csu/libc-start.c:308 __libc_start_main()
(gem_userptr_blits:1984) igt_core-INFO:   #4 [_start+0x2a]
****  END  ****
Stack trace:
  #0 [__igt_fail_assert+0x106]
  #1 ../tests/i915/gem_userptr_blits.c:801 __igt_unique____real_main2320()
  #2 ../tests/i915/gem_userptr_blits.c:2320 main()
  #3 ../csu/libc-start.c:308 __libc_start_main()
  #4 [_start+0x2a]
Subtest probe: FAIL (0.052s)



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



-- 
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