linux-kernel - [PATCH] powerpc/ptdump: fix W+X verification call in mark_rodata

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Message-Id: <37517da8310f4457f28921a4edb88fb21d27b62a.1578989531.git.christophe.leroy@c-s.fr>
Date:   Tue, 14 Jan 2020 08:13:08 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/ptdump: fix W+X verification call in mark_rodata_ro()

ptdump_check_wx() also have to be called when pages are mapped
by blocks.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
Fixes: 453d87f6a8ae ("powerpc/mm: Warn if W+X pages found on boot")
---
 arch/powerpc/mm/pgtable_32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 73b84166d06a..5fb90edd865e 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -218,6 +218,7 @@ void mark_rodata_ro(void)
 
 	if (v_block_mapped((unsigned long)_sinittext)) {
 		mmu_mark_rodata_ro();
+		ptdump_check_wx();
 		return;
 	}
 
-- 
2.13.3