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Groups > linux.kernel > #1489250
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.7 168/184] sh: fix copy_from_user() |
| Date | 2016-09-22 20:00 +0200 |
| Message-ID | <skgrV-10r-71@gated-at.bofh.it> (permalink) |
| References | <skgid-VW-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Al Viro <viro@zeniv.linux.org.uk> commit 6e050503a150b2126620c1a1e9b3a368fcd51eac upstream. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/sh/include/asm/uaccess.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/arch/sh/include/asm/uaccess.h +++ b/arch/sh/include/asm/uaccess.h @@ -151,7 +151,10 @@ copy_from_user(void *to, const void __us __kernel_size_t __copy_size = (__kernel_size_t) n; if (__copy_size && __access_ok(__copy_from, __copy_size)) - return __copy_user(to, from, __copy_size); + __copy_size = __copy_user(to, from, __copy_size); + + if (unlikely(__copy_size)) + memset(to + (n - __copy_size), 0, __copy_size); return __copy_size; }
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[PATCH 4.7 168/184] sh: fix copy_from_user() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-09-22 20:00 +0200
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