Hi kernel folks,
It seems a new gcc patch uncovered a potential problem in btrfs code, see the
warning/error below.
Does this look like a legit kernel problem?
--
Maxim Kuvyrkov
https://www.linaro.org
> On Dec 22, 2023, at 06:54, ci_not...@linaro.org wrote:
>
> Dear contributor, our automatic CI has detected problems related to your
> patch(es). Please find some details below. If you have any questions,
> please follow up on linaro-toolchain@lists.linaro.org mailing list, Libera's
> #linaro-tcwg channel, or ping your favourite Linaro toolchain developer on
> the usual project channel.
>
> We appreciate that it might be difficult to find the necessary logs or
> reproduce the issue locally. If you can't get what you need from our CI
> within minutes, let us know and we will be happy to help.
>
> We track this report status in https://linaro.atlassian.net/browse/GNU-1087 ,
> please let us know if you are looking at the problem and/or when you have a
> fix.
>
> In CI config tcwg_kernel/gnu-master-arm-stable-allmodconfig after:
>
> | commit gcc-14-6741-ge7dd72aefed
> | Author: Jakub Jelinek
> | Date: Wed Dec 20 11:31:18 2023 +0100
> |
> | c: Split -Wcalloc-transposed-args warning from -Walloc-size,
> -Walloc-size fixes
> |
> | The following patch changes -Walloc-size warning to no longer warn
> | about int *p = calloc (1, sizeof (int));, because as discussed earlier,
> | the size is IMNSHO sufficient in that case, for alloc_size with 2
> | arguments warns if the product of the 2 arguments is insufficiently
> small.
> |
> | ... 37 lines of the commit log omitted.
>
> Results changed to
> # reset_artifacts:
> -10
> # build_abe binutils:
> -9
> # build_abe stage1:
> -5
> # build_abe qemu:
> -2
> # linux_n_obj:
> 23978
> # First few build errors in logs:
>
> # 00:33:29 fs/btrfs/send.c:8208:44: error: ‘kvcalloc’ sizes specified with
> ‘sizeof’ in the earlier argument and not in the later argument
> [-Werror=calloc-transposed-args]
> # 00:33:44 make[4]: *** [scripts/Makefile.build:243: fs/btrfs/send.o] Error 1
> # 00:35:42 make[3]: *** [scripts/Makefile.build:480: fs/btrfs] Error 2
> # 00:37:40 make[2]: *** [scripts/Makefile.build:480: fs] Error 2
> # 00:47:05 make[1]: ***
> [/home/tcwg-buildslave/workspace/tcwg_kernel_1/linux/Makefile:1913: .] Error 2
> # 00:47:05 make: *** [Makefile:234: __sub-make] Error 2
>
> From
> # reset_artifacts:
> -10
> # build_abe binutils:
> -9
> # build_abe stage1:
> -5
> # build_abe qemu:
> -2
> # linux_n_obj:
> 33156
> # linux build successful:
> all
> # linux boot successful:
> boot
>
> The configuration of this build is:
> CI config tcwg_kernel/gnu-master-arm-stable-allmodconfig
>
> -8<--8<--8<--
> The information below can be used to reproduce a debug environment:
>
> Current build :
> https://ci.linaro.org/job/tcwg_kernel--gnu-master-arm-stable-allmodconfig-build/83/artifact/artifacts
> Reference build :
> https://ci.linaro.org/job/tcwg_kernel--gnu-master-arm-stable-allmodconfig-build/82/artifact/artifacts
>
> Reproduce last good and first bad builds:
> https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/e7dd72aefed851d11655aa301d6e394ec9805e0d/tcwg_kernel/gnu-master-arm-stable-allmodconfig/reproduction_instructions.txt
>
> Full commit :
> https://github.com/gcc-mirror/gcc/commit/e7dd72aefed851d11655aa301d6e394ec9805e0d
>
> List of configurations that regressed due to this commit :
> * tcwg_kernel
> ** gnu-master-arm-stable-allmodconfig
> *** Failure
> ***
> https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/e7dd72aefed851d11655aa301d6e394ec9805e0d/tcwg_kernel/gnu-master-arm-stable-allmodconfig/details.txt
> ***
> https://ci.linaro.org/job/tcwg_kernel--gnu-master-arm-stable-allmodconfig-build/83/artifact/artifacts
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