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thinkpad-acpi: restrict procfs count value to sane upper limit 

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Michael Buesch 2009-08-01 12:04:19 -03:00 committed by Len Brown
parent 1f6fc2de95
commit 5b05d4696d
1 changed files with 2 additions and 0 deletions
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2
drivers/platform/x86/thinkpad_acpi.c
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@ -766,6 +766,8 @@ static int dispatch_procfs_write(struct file *file,
if (!ibm || !ibm->write)
return -EINVAL;
if (count > PAGE_SIZE - 2)
return -EINVAL;
kernbuf = kmalloc(count + 2, GFP_KERNEL);
if (!kernbuf)