Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH] sparc: copy_from_user() should not return -EFAULT | Date | Tue, 5 Jan 2010 18:55:58 +0100 |
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On Tuesday 05 January 2010, Heiko Carstens wrote: > Subject: [PATCH] sparc: copy_from_user() should not return -EFAULT > > From: Heiko Carstens <heiko.carstens@de.ibm.com> > > Callers of copy_from_user() expect it to return the number of bytes > it could not copy. In no case it is supposed to return -EFAULT. > > In case of a detected buffer overflow just return the requested > length. In addition one could think of a memset that would clear > the size of the target object. > > Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
The xtensa clear_user function seems to have a similar issue, it should return size on failure, not -EFAULT.
Arnd
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