Re: [Bug 210021] New: IB/rxe: build error due to unmet dependency for CRYPTO_CRC32 by RDMA_RXE

[Zhu Yanjun <zyjzyj2000@gmail.com>]

On Tue, Nov 3, 2020 at 7:33 PM <bugzilla-daemon@bugzilla.kernel.org> wrote:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=210021
>
>             Bug ID: 210021
>            Summary: IB/rxe: build error due to unmet dependency for
>                     CRYPTO_CRC32 by RDMA_RXE
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 5.4.4
>           Hardware: All
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Infiniband/RDMA
>           Assignee: drivers_infiniband-rdma@kernel-bugs.osdl.org
>           Reporter: fazilyildiran@gmail.com
>                 CC: dledford@redhat.com, fazilyildiran@gmail.com,
>                     leon@leon.nu, paul@pgazz.com
>         Regression: No
>
> Created attachment 293417
>   --> https://bugzilla.kernel.org/attachment.cgi?id=293417&action=edit
> reproduce.tar.gz
>
> Attachment (reproduce.tar.gz) content:
>  - sample.config: Config file to reproduce the bug.
>  - build_out.txt: Output of Kbuild including the error messages.
>
> When RDMA_RXE is enabled and CRYPTO is disabled, it results in the
> following Kbuild warning:
>
> WARNING: unmet direct dependencies detected for CRYPTO_CRC32

https://lkml.org/lkml/2020/9/15/360

Please check this mail thread.

The discussion is in the above link.

Zhu Yanjun

>   Depends on [n]: CRYPTO [=n]
>   Selected by [y]:
>   - RDMA_RXE [=y] && (INFINIBAND_USER_ACCESS [=y] || !INFINIBAND_USER_ACCESS
> [=y]) && INET [=y] && PCI [=y] && INFINIBAND [=y] && (!64BIT [=y] ||
> ARCH_DMA_ADDR_T_64BIT [=y])
>
> Building the kernel fails due to this unmet direct dependency issue as follows:
>
> [...]
>   LD      .tmp_vmlinux1
> crypto/crc32_generic.o: In function `crc32_mod_fini':
> crc32_generic.c:(.exit.text+0x8): undefined reference to
> `crypto_unregister_shash'
> crypto/crc32_generic.o: In function `crc32_mod_init':
> crc32_generic.c:(.init.text+0x8): undefined reference to
> `crypto_register_shash'
> drivers/infiniband/sw/rxe/rxe.o: In function `rxe_dealloc':
> rxe.c:(.text+0x102): undefined reference to `crypto_destroy_tfm'
> drivers/infiniband/sw/rxe/rxe_req.o: In function `rxe_crc32.isra.17':
> rxe_req.c:(.text+0x219): undefined reference to `crypto_shash_update'
> drivers/infiniband/sw/rxe/rxe_recv.o: In function `rxe_crc32.isra.7':
> rxe_recv.c:(.text+0xeb): undefined reference to `crypto_shash_update'
> drivers/infiniband/sw/rxe/rxe_verbs.o: In function `rxe_register_device':
> rxe_verbs.c:(.text+0x117d): undefined reference to `crypto_alloc_shash'
> drivers/infiniband/sw/rxe/rxe_mr.o: In function `rxe_crc32.isra.3':
> rxe_mr.c:(.text+0x13b): undefined reference to `crypto_shash_update'
> drivers/infiniband/sw/rxe/rxe_icrc.o: In function `rxe_crc32.isra.0':
> rxe_icrc.c:(.text+0x26): undefined reference to `crypto_shash_update'
> Makefile:1077: recipe for target 'vmlinux' failed
> make: *** [vmlinux] Error 1
>
> Steps to reproduce the bug for v5.4.4:
>   1. wget
> https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
> ~/bin/make.cross
>   2. chmod +x ~/bin/make.cross
>   3. tar -xvf reproduce.tar.gz # sample.config and build_out.txt
>   4. cp sample.config path/to/linux-source-v5.4.4/.config
>   5. cd path/to/linux-source-v5.4.4/
>   6. ~/bin/make.cross ARCH=x86_64 clean
>   7. ~/bin/make.cross ARCH=x86_64 olddefconfig # unmet direct dependency
> warning
>   8. ~/bin/make.cross ARCH=x86_64 # should have a build error
>
> The output for the steps [6-8] can be found in build_out.txt.
>
> The build error happens as follows: RDMA_RXE selects CRYPTO_CRC32.
> CRYPTO_CRC32 selects CRYPTO_HASH, and CRYPTO_HASH selects CRYPTO_HASH2.
> When RDMA_RXE selects CRYPTO_CRC32 without accounting for its direct
> dependency (CRYPTO), CRYPTO_CRC32 gets enabled but it does not select
> CRYPTO_HASH thus CRYPTO_HASH2. Consequently, the required functions
> such crypto_unregister_shash are left undefined, causing the build error.
>
> Thanks,
> Necip
>
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