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Date: Tue, 22 Feb 2011 11:04:56 +0800
From: Eugene Teo <>
CC: Dan Rosenberg <>
Subject: Re: CVE request: kernel: btrfs heap overflow

On 02/09/2011 10:27 PM, Dan Rosenberg wrote:
> Commit bf5fc093c5b625e4259203f1cee7ca73488a5620 refactored
> btrfs_ioctl_space_info() and introduced security issues.  Since they
> were all introduced at once and fixed at the same time, one CVE should
> suffice.
> Due to integer truncation or a signedness error in a typecasted
> comparison, an integer overflow in an allocation size calculation, and
> a failure to properly check bounds when copying data, it was possible
> for an unprivileged user to cause a denial-of-service due to writing
> to an invalid pointer (ZERO_SIZE_PTR) or cause a kernel heap overflow.
> -Dan
> [1]


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