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Date: Wed, 9 Feb 2011 09:27:32 -0500
From: Dan Rosenberg <>
Subject: CVE request: kernel: btrfs heap overflow

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

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.



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