Thread (2 messages) flat view 2 messages, 2 authors, 2021-05-15
STALE1936d LANDED

Landed in mainline as 5d510ed78bcf on 2021-05-12.

[PATCH] powerpc/syscall: Calling kuap_save_and_lock() is wrong

From: Christophe Leroy <hidden>
Date: 2021-05-06 11:56:37
Also in: lkml
Subsystem: linux for powerpc (32-bit and 64-bit), the rest · Maintainers: Madhavan Srinivasan, Linus Torvalds

kuap_save_and_lock() is only for interrupts inside kernel.

system call are only from user, calling kuap_save_and_lock()
is wrong.

Fixes: c16728835eec ("powerpc/32: Manage KUAP in C")
Signed-off-by: Christophe Leroy <redacted>
---
 arch/powerpc/kernel/interrupt.c | 3 ---
 1 file changed, 3 deletions(-)
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index e4559f8914eb..30a596182baa 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -34,9 +34,6 @@ notrace long system_call_exception(long r3, long r4, long r5,
 	syscall_fn f;
 
 	kuep_lock();
-#ifdef CONFIG_PPC32
-	kuap_save_and_lock(regs);
-#endif
 
 	regs->orig_gpr3 = r3;
 
-- 
2.25.0
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