From: Andrew Lunn <andrew@lunn.ch>
To: Li Jun <lijun01@kylinos.cn>
Cc: gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com,
linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm: mvebu: fix null pointer when access
Date: Wed, 18 Mar 2026 14:29:57 +0100 [thread overview]
Message-ID: <e1c5744b-a6a4-4b56-bec0-b31c4d514bc5@lunn.ch> (raw)
In-Reply-To: <20260318075324.2477118-1-lijun01@kylinos.cn>
On Wed, Mar 18, 2026 at 03:53:24PM +0800, Li Jun wrote:
> the kzalloc may return null pointer, will cause kernel panic.
The kernel is a dead man walking if the memory allocation fails, so
that coherency cannot be configured correctly. A panic at least gives
a stack trace, rather than a nearly undebuggable deadlock later on.
Not all kernel panics are bad. You need to look at the context, the
comments in the code.
Andrew
prev parent reply other threads:[~2026-03-18 13:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-18 7:53 Li Jun
2026-03-18 8:03 ` Russell King (Oracle)
2026-03-18 13:29 ` Andrew Lunn [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=e1c5744b-a6a4-4b56-bec0-b31c4d514bc5@lunn.ch \
--to=andrew@lunn.ch \
--cc=gregory.clement@bootlin.com \
--cc=lijun01@kylinos.cn \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=sebastian.hesselbarth@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®