linux-kernel - [PATCH -next v5 18/22] arm64/ptrace: Expand secure

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Message-ID: <20241206101744.4161990-19-ruanjinjie@huawei.com>
Date: Fri, 6 Dec 2024 18:17:40 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
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Subject: [PATCH -next v5 18/22] arm64/ptrace: Expand secure_computing() in place

The generic entry expand secure_computing() in place and call
__secure_computing() directly.

In order to switch to the generic entry for arm64, refactor
secure_computing() for syscall_trace_enter().

No functional changes.

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 arch/arm64/kernel/ptrace.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index b53d3759baf8..c0c00e173f61 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -2368,8 +2368,11 @@ int syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long flags)
 	}
 
 	/* Do the secure computing after ptrace; failures should be fast. */
-	if (secure_computing() == -1)
-		return NO_SYSCALL;
+	if (flags & _TIF_SECCOMP) {
+		ret = __secure_computing(NULL);
+		if (ret == -1L)
+			return NO_SYSCALL;
+	}
 
 	/* Either of the above might have changed the syscall number */
 	syscall = syscall_get_nr(current, regs);
-- 
2.34.1