Hi Sudeep,
On Fri, Aug 29, 2025 at 04:29:48PM +0200, Johan Hovold wrote:
On Fri, Aug 29, 2025 at 03:21:52PM +0200, Johan Hovold wrote:
The quirk version range is typically a string constant and must not be modified (e.g. as it may be stored in read-only memory):
Unable to handle kernel write to read-only memory at virtual address ffffc036d998a947
Fix the range parsing so that it operates on a copy of the version range string, and mark all the quirk strings as const to reduce the risk of introducing similar future issues.
With Jan's permission, let's add:
Reported-by: Jan Palus jpalus@fastmail.com
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220437 Fixes: 487c407d57d6 ("firmware: arm_scmi: Add common framework to handle firmware quirks") Cc: stable@vger.kernel.org # 6.16 Cc: Cristian Marussi cristian.marussi@arm.com Signed-off-by: Johan Hovold johan@kernel.org
I noticed that you picked up this fix yesterday but also that you rewrote the commit message and switched using cleanup helpers.
Please don't do such (non-trivial) changes without making that clear in the commit message before your Signed-off-by tag:
[ sudeep: rewrite commit message; switch to cleanup helpers ]
In this case, you also changed the meaning so that the commit message now reads like the sole reason that writing to string constants is wrong is that they may reside in read-only memory.
I used "e.g." on purpose instead of listing further reasons like the fact that string constants may be shared so that parsing of one quirk can subtly break a later one.
Johan