From: Hongyu Xie <xiehongyu1@kylinos.cn>
To: sfr@canb.auug.org.au
Cc: linux-kernel@vger.kernel.org, linux-next@vger.kernel.org,
Hongyu Xie <xiehongyu1@kylinos.cn>
Subject: Report a compile err
Date: Mon, 30 Jan 2023 15:30:12 +0800 [thread overview]
Message-ID: <20230130073012.374172-1-xiehongyu1@kylinos.cn> (raw)
In-Reply-To: <20230130165442.29f65a51@canb.auug.org.au>
source code:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
base:
ae0c77e1bc6963c67c6c09e8c72959fcb1ed8d5f
config tested:
x86_64_defconfig
defconfig(arm64)
toolchain:
gcc version 10.4.0 (Ubuntu 10.4.0-4ubuntu1~22.04)
cross compile toolchain:
gcc version 10.4.0 (Ubuntu 10.4.0-4ubuntu1~22.04)
reproduce compile err:
CONFIG_WERROR=y && CONFIG_PRINTK=n && CONFIG_UBSAN_ALIGNMENT=y &&
CONFIG_UBSAN_SANITIZE_ALL=y
compile err log:
kernel/printk/printk.c: In function ‘console_flush_all’:
kernel/printk/printk.c:2845:17: error: array subscript 0 is outside array
bounds of ‘char[0]’ [-Werror=array-bounds]
2845 | char *outbuf = &pbufs.outbuf[0];
| ^~~~~~~~~~~~~~~~
In file included from kernel/printk/printk.c:61:
kernel/printk/internal.h:87:7: note: while referencing ‘outbuf’
87 | char outbuf[PRINTK_MESSAGE_MAX];
| ^~~~~~
kernel/printk/printk.c:2842:31: note: defined here ‘pbufs’
2842 | static struct printk_buffers pbufs;
| ^~~~~
I applied the way 5a41237ad1d4 in mainline did for gcc 10, problem goes
away. I'm guessing this is a gcc bug.
next prev parent reply other threads:[~2023-01-30 7:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 5:54 linux-next: Tree for Jan 30 Stephen Rothwell
2023-01-30 7:30 ` Hongyu Xie [this message]
2023-01-30 8:10 ` Report a compile err Willy Tarreau
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