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Re: [PATCH] infiniband: remove WARN that is not kernel bug

From Valdis.Kletnieks@vt.edu
Newsgroups linux.kernel
Subject Re: [PATCH] infiniband: remove WARN that is not kernel bug
Date 2016-11-19 03:30 +0100
Message-ID <sF3zH-7an-1@gated-at.bofh.it> (permalink)
References <sEPwK-6s7-35@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 18 Nov 2016 12:24:37 +0100, Dmitry Vyukov said:
> WARNINGs mean kernel bugs.
> The one in ucma_write() points to user programming error
> or a malicious attempt. This is not a kernel bug, remove it.

> -	if (WARN_ON_ONCE(!ib_safe_file_access(filp)))
> +	if (!ib_safe_file_access(filp))
>  		return -EACCES;

In that case, wouldn't this be better?

	if (!ib_safe_file_access(filp)) {
		printk_once("Process %d (%s) tried to do something hinky", pid, comm);
		return _EACCESS;
	}

so the sysadmin becomes aware of the malicious attempt?

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Thread

[PATCH] infiniband: remove WARN that is not kernel bug Dmitry Vyukov <dvyukov@google.com> - 2016-11-18 12:30 +0100
  Re: [PATCH] infiniband: remove WARN that is not kernel bug Valdis.Kletnieks@vt.edu - 2016-11-19 03:30 +0100
    Re: [PATCH] infiniband: remove WARN that is not kernel bug Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-19 20:00 +0100
      Re: [PATCH] infiniband: remove WARN that is not kernel bug Dmitry Vyukov <dvyukov@google.com> - 2016-11-21 11:30 +0100

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