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Old 08-02-2011, 09:31 AM
Andy Whitcroft
Default GFS2: make sure fallocate bytes is a multiple of blksize

The gfs2_fallocate function in fs/gfs2/file.c in the Linux kernel
before 3.0-rc1 does not ensure that the size of a chunk allocation
is a multiple of the block size, which allows local users to
cause a denial of service (BUG and system crash) by arranging
for all resource groups to have too little free space.

This bug was introduced in v2.6.37-rc1 and therefore maverick and
earlier are unaffected. Following this email is a patch for natty and
natty/ti-omap4. This patch is a clean charry-pick of the upstream fix.

Proposing for natty and natty/ti-omap4.


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