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| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2010-02-05 15:01:09 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-02-23 07:37:54 -0800 |
| commit | 6b344d83ca458327faa0e1f6afd45c39cceab2a6 (patch) | |
| tree | d3fae8ec89634c8a079a456e0c9cfd29373ed617 /arch/x86/kernel/microcode_amd.c | |
| parent | 0e1104ada32d242bc6169a2ce4eb19ec4febb813 (diff) | |
devmem: check vmalloc address on kmem read/write
commit 325fda71d0badc1073dc59f12a948f24ff05796a
[ cebbert@redhat.com : backport to 2.6.32 ]
devmem: check vmalloc address on kmem read/write
Otherwise vmalloc_to_page() will BUG().
This also makes the kmem read/write implementation aligned with mem(4):
"References to nonexistent locations cause errors to be returned." Here we
return -ENXIO (inspired by Hugh) if no bytes have been transfered to/from
user space, otherwise return partial read/write results.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/x86/kernel/microcode_amd.c')
0 files changed, 0 insertions, 0 deletions