[tip: x86/fpu] x86/fpu/signal: Fix missed conversion to correct boolean retval in save_xstate_epilog()

[tip-bot2 for Anders Roxell]

The following commit has been merged into the x86/fpu branch of tip:

Commit-ID:     724fc0248d450224b19ef5b5ee41e392348f6704
Gitweb:        https://git.kernel.org/tip/724fc0248d450224b19ef5b5ee41e392348f6704
Author:        Anders Roxell <anders.roxell@xxxxxxxxxx>
AuthorDate:    Wed, 22 Sep 2021 22:09:01 +02:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Thu, 23 Sep 2021 10:52:20 +02:00

x86/fpu/signal: Fix missed conversion to correct boolean retval in save_xstate_epilog()

Fix the missing return code polarity in save_xstate_epilog().

 [ bp: Massage, use the right commit in the Fixes: tag ]

Fixes: 2af07f3a6e9f ("x86/fpu/signal: Change return type of copy_fpregs_to_sigframe() helpers to boolean")
Reported-by: Remi Duraffort <remi.duraffort@xxxxxxxxxx>
Signed-off-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Tested-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Link: https://github.com/ClangBuiltLinux/linux/issues/1461
Link: https://lkml.kernel.org/r/20210922200901.1823741-1-anders.roxell@xxxxxxxxxx
---
 arch/x86/kernel/fpu/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index 68f03da..39c7bae 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -106,7 +106,7 @@ static inline bool save_xstate_epilog(void __user *buf, int ia32_frame)
 	err = __copy_to_user(&x->i387.sw_reserved, sw_bytes, sizeof(*sw_bytes));
 
 	if (!use_xsave())
-		return err;
+		return !err;
 
 	err |= __put_user(FP_XSTATE_MAGIC2,
 			  (__u32 __user *)(buf + fpu_user_xstate_size));