linux-kernel - [PATCH] Print loaded modules when we encounter a bad page map.

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Message-ID: <20121211171745.GA17489@redhat.com>
Date:	Tue, 11 Dec 2012 12:17:45 -0500
From:	Dave Jones <davej@...hat.com>
To:	linux-mm@...ck.org
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] Print loaded modules when we encounter a bad page map.

When we see reports like https://bugzilla.redhat.com/show_bug.cgi?id=883576
it might be useful to know what modules had been loaded, so they can be compared
with similar reports to see if there is a common suspect.

Signed-off-by: Dave Jones <davej@...hat.com>

diff --git a/mm/memory.c b/mm/memory.c
index 221fc9f..7fc8c01 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -57,6 +57,7 @@
 #include <linux/swapops.h>
 #include <linux/elf.h>
 #include <linux/gfp.h>
+#include <linux/module.h>

 #include <asm/io.h>
 #include <asm/pgalloc.h>
@@ -708,6 +709,7 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr,
 	if (vma->vm_file && vma->vm_file->f_op)
 		print_symbol(KERN_ALERT "vma->vm_file->f_op->mmap: %s\n",
 				(unsigned long)vma->vm_file->f_op->mmap);
+	print_modules();
 	dump_stack();
 	add_taint(TAINT_BAD_PAGE);
 }
--
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