From: Dan Carpenter <dan.carpenter@linaro.org>
To: marc.herbert@linux.intel.com
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Greg KH <gregkh@linuxfoundation.org>,
Dan Williams <dan.j.williams@intel.com>,
rafael.j.wysocki@intel.com, linux-cxl@vger.kernel.org,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rafael@kernel.org>,
Sudeep Holla <sudeep.holla@arm.com>,
Ben Cheatham <Benjamin.Cheatham@amd.com>,
Danilo Krummrich <dakr@kernel.org>
Subject: Re: [PATCH] driver core: faux: fix Undefined Behavior in faux_device_destroy()
Date: Wed, 25 Jun 2025 10:21:24 -0500 [thread overview]
Message-ID: <4d54e4f6-0d98-4b42-9bea-169f3b8772bb@sabinyo.mountain> (raw)
In-Reply-To: <20250613191556.4184103-1-marc.herbert@linux.intel.com>
On Fri, Jun 13, 2025 at 07:15:56PM +0000, marc.herbert@linux.intel.com wrote:
> gcc -O0: Segmentation fault (core dumped)
> gcc -O1: ptr is zero
> gcc -O2: ptr is NOT zero!!!
> gcc -O3: ptr is NOT zero!!!
> gcc -Og: ptr is zero
Btw, this is testing dereferences where the kernel code is doing pointer
math. No one disagrees about dereferences after a check.
regards,
dan carpenter
prev parent reply other threads:[~2025-06-25 15:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-13 19:15 [PATCH] driver core: faux: fix Undefined Behavior in faux_device_destroy() marc.herbert
2025-06-13 20:20 ` Miguel Ojeda
2025-06-14 0:33 ` Greg KH
2025-06-14 10:50 ` Miguel Ojeda
2025-06-14 11:53 ` Greg KH
2025-06-14 14:53 ` Marc Herbert
2025-06-16 3:35 ` Greg KH
2025-06-16 14:02 ` Alice Ryhl
2025-06-18 23:43 ` Marc Herbert
2025-06-19 0:23 ` Dan Williams
2025-06-19 2:35 ` Dan Carpenter
2025-06-19 3:33 ` Marc Herbert
2025-06-19 4:02 ` Dan Carpenter
2025-06-26 0:55 ` Kent Overstreet
2025-06-30 23:24 ` Marc Herbert
2025-06-25 15:20 ` Dan Carpenter
2025-06-25 22:30 ` Marc Herbert
2025-06-25 23:18 ` Dan Carpenter
2025-06-25 15:21 ` Dan Carpenter [this message]
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