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authorJoseph Qi <joseph.qi@huawei.com>2015-08-06 15:46:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-08-07 04:39:41 +0300
commit32e5a2a2be6b085febaac36efff495ad65a55e6c (patch)
tree7b491fbda572fa03a6a0fbb3dc650e2e09fe7cf6 /mm/memory_hotplug.c
parent18896451eaeee497ef5c397d76902c6376a8787d (diff)
downloadlinux-32e5a2a2be6b085febaac36efff495ad65a55e6c.tar.bz2
ocfs2: fix shift left overflow
When using a large volume, for example 9T volume with 2T already used, frequent creation of small files with O_DIRECT when the IO is not cluster aligned may clear sectors in the wrong place. This will cause filesystem corruption. This is because p_cpos is a u32. When calculating the corresponding sector it should be converted to u64 first, otherwise it may overflow. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: <stable@vger.kernel.org> [4.0+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory_hotplug.c')
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