4.15-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@c-s.fr
[ Upstream commit a0e94598e6b6c0d1df6a5fa14eb7c767ca817a20 ]
Destination is a kernel pointer and source - a userland one in _copy_from_user(); _copy_to_user() is the other way round.
Fixes: d597580d37377 ("generic ...copy_..._user primitives") Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- lib/usercopy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/usercopy.c +++ b/lib/usercopy.c @@ -20,7 +20,7 @@ EXPORT_SYMBOL(_copy_from_user); #endif
#ifndef INLINE_COPY_TO_USER -unsigned long _copy_to_user(void *to, const void __user *from, unsigned long n) +unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n) { might_fault(); if (likely(access_ok(VERIFY_WRITE, to, n))) {