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From: "Clément Léger" <cleger@rivosinc.com>
To: linux-doc@vger.kernel.org (open list:DOCUMENTATION),
	linux-kernel@vger.kernel.org (open list),
	linux-riscv@lists.infradead.org (open list:RISC-V ARCHITECTURE),
	linux-kselftest@vger.kernel.org (open list:KERNEL SELFTEST
	FRAMEWORK)
Cc: "Clément Léger" <cleger@rivosinc.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexandre Ghiti" <alex@ghiti.fr>,
	"Shuah Khan" <shuah@kernel.org>,
	"Andrew Jones" <ajones@ventanamicro.com>,
	"Samuel Holland" <samuel.holland@sifive.com>
Subject: [PATCH 3/5] riscv: misaligned: use get_user() instead of __get_user()
Date: Mon, 14 Apr 2025 14:34:43 +0200	[thread overview]
Message-ID: <20250414123543.1615478-4-cleger@rivosinc.com> (raw)
In-Reply-To: <20250414123543.1615478-1-cleger@rivosinc.com>

Now that we can safely handle user memory accesses while in the
misaligned access handlers, use get_user() instead of __get_user() to
have user memory access checks.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
---
 arch/riscv/kernel/traps_misaligned.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps_misaligned.c
index 4354c87c0376..97c674d7d34f 100644
--- a/arch/riscv/kernel/traps_misaligned.c
+++ b/arch/riscv/kernel/traps_misaligned.c
@@ -268,7 +268,7 @@ static unsigned long get_f32_rs(unsigned long insn, u8 fp_reg_offset,
 	int __ret;					\
 							\
 	if (user_mode(regs)) {				\
-		__ret = __get_user(insn, (type __user *) insn_addr); \
+		__ret = get_user(insn, (type __user *) insn_addr); \
 	} else {					\
 		insn = *(type *)insn_addr;		\
 		__ret = 0;				\
-- 
2.49.0


  parent reply	other threads:[~2025-04-14 12:35 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-14 12:34 [PATCH 0/5] riscv: misaligned: fix interruptible context and add tests Clément Léger
2025-04-14 12:34 ` [PATCH 1/5] riscv: misaligned: factorize trap handling Clément Léger
2025-04-21  7:06   ` Alexandre Ghiti
2025-04-22  7:57     ` Clément Léger
2025-04-22  9:44       ` Peter Zijlstra
2025-04-22 10:17         ` Clément Léger
2025-05-01 20:41           ` Maciej W. Rozycki
2025-05-01 20:51             ` Maciej W. Rozycki
2025-04-14 12:34 ` [PATCH 2/5] riscv: misaligned: enable IRQs while handling misaligned accesses Clément Léger
2025-04-21  7:13   ` Alexandre Ghiti
2025-04-14 12:34 ` Clément Léger [this message]
2025-04-21  7:21   ` [PATCH 3/5] riscv: misaligned: use get_user() instead of __get_user() Alexandre Ghiti
2025-04-14 12:34 ` [PATCH 4/5] Documentation/sysctl: add riscv to unaligned-trap supported archs Clément Léger
2025-04-21  7:22   ` Alexandre Ghiti
2025-04-14 12:34 ` [PATCH 5/5] selftests: riscv: add misaligned access testing Clément Léger

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