linux-hardening - Re: [PATCH][next] uapi: target: Replace fake flex-array with flexible-array member

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Date:   Sun,  2 Apr 2023 22:15:04 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Bodo Stroesser <bostroesser@...il.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] uapi: target: Replace fake flex-array with flexible-array member

On Fri, 17 Mar 2023 10:59:48 -0600, Gustavo A. R. Silva wrote:

> Zero-length arrays as fake flexible arrays are deprecated and we are
> moving towards adopting C99 flexible-array members instead.
> 
> Address the following warning found with GCC-13 and
> -fstrict-flex-arrays=3 enabled:
>   CC      drivers/target/target_core_user.o
> drivers/target/target_core_user.c: In function ‘queue_cmd_ring’:
> drivers/target/target_core_user.c:1096:15: warning: array subscript 0 is outside array bounds of ‘struct iovec[0]’ [-Warray-bounds=]
>  1096 |         iov = &entry->req.iov[0];
>       |               ^~~~~~~~~~~~~~~~~~
> In file included from drivers/target/target_core_user.c:31:
> ./include/uapi/linux/target_core_user.h:122:38: note: while referencing ‘iov’
>   122 |                         struct iovec iov[0];
>       |                                      ^~~
> 
> [...]

Applied to 6.4/scsi-queue, thanks!

[1/1] uapi: target: Replace fake flex-array with flexible-array member
      https://git.kernel.org/mkp/scsi/c/5c8c74ef20e7

-- 
Martin K. Petersen	Oracle Linux Engineering