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um: Fix pointer cast 

Fix a pointer cast typo introduced in v4.4-rc5 especially visible for
the i386 subarchitecture where it results in a kernel crash.

[ Also removed pointless cast as per Al Viro - Linus ]

Fixes: 8090bfd2bb ("um: Fix fpstate handling")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Jeff Dike <jdike@addtoit.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mickaël Salaün 2015-12-22 21:44:01 +01:00 committed by Linus Torvalds
parent 4ef7675344
commit de3793796f
1 changed files with 1 additions and 1 deletions
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2
arch/x86/um/signal.c
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@ -470,7 +470,7 @@ long sys_sigreturn(void)
struct sigcontext __user *sc = &frame->sc;
int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long);
if (copy_from_user(&set.sig[0], (void *)sc->oldmask, sizeof(set.sig[0])) ||
if (copy_from_user(&set.sig[0], &sc->oldmask, sizeof(set.sig[0])) ||
copy_from_user(&set.sig[1], frame->extramask, sig_size))
goto segfault;