linux-kernel - Re: [RFC PATCH] Add CRC checksum for RCU lists

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070921140221.000a416a@twins>
Date:	Fri, 21 Sep 2007 14:02:21 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"Paul E. McKenney" <paulmck@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH] Add CRC checksum for RCU lists

On Thu, 20 Sep 2007 14:34:11 -0400 Steven Rostedt <rostedt@...dmis.org>
wrote:


> +static inline void rcu_crc_check(struct rcu_head *head)
> +{
> +	static int once;
> +	if (unlikely(head->crc != rcu_crc_calc(head)) && !once) {
> +		once++;
> +		printk("BUG: RCU check failed!");
> +		if (head->caller)
> +			printk(" (caller=%p)",
> +			       head->caller);

		char sym[KSYM_SYMBOL_LEN];
		sprint_symbol(sym, head->caller);
		printk(" (caller: [<%p>] %s)", head->caller, sym);

> +		printk("\n");
> +		printk("  CRC was %08lx, expected %08lx\n",
> +		       head->crc, rcu_crc_calc(head));
> +		printk("  %p %p\n",
> +		       head->next, head->func);
> +		dump_stack();
> +	}
> +}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/