Re: [linux-next:master] [selftests] 35c9dcde4e: kernel-selftests.exec.load_address_16777216.fail

[Kees Cook <keescook@chromium.org>]

Hi Andrew,

Can you please drop commit 35c9dcde4ecb ("selftests: exec: make
binaries position independent")? It looks like it's broken under certain
conditions, and what's more, it seems it's been subtly half-broken since
commit 4d1cd3b2c5c1 ("tools/testing/selftests/exec: fix link error")
too. (Using -static changed the nature of the test since now it doesn't
have an INTERP program header.)

I'll be working to fix it up.

Thanks!

-Kees

On Wed, May 08, 2024 at 11:22:02AM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed "kernel-selftests.exec.load_address_16777216.fail" on:
> 
> commit: 35c9dcde4ecb82ba4a46219a345c36054fd15454 ("selftests: exec: make binaries position independent")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> 
> [test failed on linux-next/master 9221b2819b8a4196eecf5476d66201be60fbcf29]
> 
> in testcase: kernel-selftests
> version: kernel-selftests-x86_64-c7864053-1_20240419
> with following parameters:
> 
> 	group: group-01
> 
> 
> 
> compiler: gcc-13
> test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (Cascade Lake) with 32G memory
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> we also found kernel-selftests.exec.load_address_2097152.fail
> which always pass on parent.
> 
> 200a289b342bae6c 35c9dcde4ecb82ba4a46219a345
> ---------------- ---------------------------
>        fail:runs  %reproduction    fail:runs
>            |             |             |
>            :6          100%           6:6     kernel-selftests.exec.load_address_16777216.fail
>            :6          100%           6:6     kernel-selftests.exec.load_address_2097152.fail
> 
> 
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@intel.com>
> | Closes: https://lore.kernel.org/oe-lkp/202405081002.fc4eafcb-oliver.sang@intel.com
> 
> 
> 
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20240508/202405081002.fc4eafcb-oliver.sang@intel.com
> 
> 
> # timeout set to 300
> # selftests: exec: load_address_2097152
> # TAP version 13
> # 1..1
> # Bail out! FAILED: alignment = 2097152, load_address = 140281068855296
> # # Planned tests != run tests (1 != 0)
> # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
> not ok 3 selftests: exec: load_address_2097152 # exit=1
> # timeout set to 300
> # selftests: exec: load_address_16777216
> # TAP version 13
> # 1..1
> # Bail out! FAILED: alignment = 16777216, load_address = 139671213199360
> # # Planned tests != run tests (1 != 0)
> # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
> not ok 4 selftests: exec: load_address_16777216 # exit=1
> 
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
> 



-- 
Kees Cook