linux-kernel - [PATCH v6 01/16] arm64: module: remove unneeded call to kasan_alloc_module

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Message-ID: <20240426082854.7355-2-rppt@kernel.org>
Date: Fri, 26 Apr 2024 11:28:39 +0300
From: Mike Rapoport <rppt@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Alexandre Ghiti <alexghiti@...osinc.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
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Subject: [PATCH v6 01/16] arm64: module: remove unneeded call to kasan_alloc_module_shadow()

From: "Mike Rapoport (IBM)" <rppt@...nel.org>

Since commit f6f37d9320a1 ("arm64: select KASAN_VMALLOC for SW/HW_TAGS
modes") KASAN_VMALLOC is always enabled when KASAN is on. This means
that allocations in module_alloc() will be tracked by KASAN protection
for vmalloc() and that kasan_alloc_module_shadow() will be always an
empty inline and there is no point in calling it.

Drop meaningless call to kasan_alloc_module_shadow() from
module_alloc().

Signed-off-by: Mike Rapoport (IBM) <rppt@...nel.org>
---
 arch/arm64/kernel/module.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
index 47e0be610bb6..e92da4da1b2a 100644
--- a/arch/arm64/kernel/module.c
+++ b/arch/arm64/kernel/module.c
@@ -141,11 +141,6 @@ void *module_alloc(unsigned long size)
 				    __func__);
 	}
 
-	if (p && (kasan_alloc_module_shadow(p, size, GFP_KERNEL) < 0)) {
-		vfree(p);
-		return NULL;
-	}
-
 	/* Memory is intended to be executable, reset the pointer tag. */
 	return kasan_reset_tag(p);
 }
-- 
2.43.0