linux-kernel - Re: [PATCH] scsi: lpfc: fix overflow build issue

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Message-ID: <172437814913.4018943.7804520176988407566.b4-ty@oracle.com>
Date: Thu, 22 Aug 2024 21:56:03 -0400
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: james.smart@...adcom.com, dick.kennedy@...adcom.com,
        James.Bottomley@...senPartnership.com,
        Sherry Yang <sherry.yang@...cle.com>
Cc: "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi: lpfc: fix overflow build issue

On Tue, 20 Aug 2024 23:51:31 -0700, Sherry Yang wrote:

> Build failed while enabling "CONFIG_GCOV_KERNEL=y" and
> "CONFIG_GCOV_PROFILE_ALL=y" with following error:
> 
> BUILDSTDERR: drivers/scsi/lpfc/lpfc_bsg.c: In function 'lpfc_get_cgnbuf_info':
> BUILDSTDERR: ./include/linux/fortify-string.h:114:33: error: '__builtin_memcpy' accessing 18446744073709551615 bytes at offsets 0 and 0 overlaps 9223372036854775807 bytes at offset -9223372036854775808 [-Werror=restrict]
> BUILDSTDERR:   114 | #define __underlying_memcpy     __builtin_memcpy
> BUILDSTDERR:       |                                 ^
> BUILDSTDERR: ./include/linux/fortify-string.h:637:9: note: in expansion of macro '__underlying_memcpy'
> BUILDSTDERR:   637 |         __underlying_##op(p, q, __fortify_size);                        \
> BUILDSTDERR:       |         ^~~~~~~~~~~~~
> BUILDSTDERR: ./include/linux/fortify-string.h:682:26: note: in expansion of macro '__fortify_memcpy_chk'
> BUILDSTDERR:   682 | #define memcpy(p, q, s)  __fortify_memcpy_chk(p, q, s,                  \
> BUILDSTDERR:       |                          ^~~~~~~~~~~~~~~~~~~~
> BUILDSTDERR: drivers/scsi/lpfc/lpfc_bsg.c:5468:9: note: in expansion of macro 'memcpy'
> BUILDSTDERR:  5468 |         memcpy(cgn_buff, cp, cinfosz);
> BUILDSTDERR:       |         ^~~~~~
> 
> [...]

Applied to 6.11/scsi-fixes, thanks!

[1/1] scsi: lpfc: fix overflow build issue
      https://git.kernel.org/mkp/scsi/c/3417c9574e36

-- 
Martin K. Petersen	Oracle Linux Engineering