From b077c3569788f5eb5ddf85bf41026b452d253a90 Mon Sep 17 00:00:00 2001

From: Qianli Zhao <qianli.zhao@horizon.ai>

Date: Mon, 4 Jul 2022 16:40:01 +0800

Subject: [PATCH 09/28] arm64: Fix for st->_stext_vmlinux not initialized when

 set VA_BITS_ACTUAL

Setting st->_stext_vmlinux to UNINITIALIZED to search for "_stext"

from the vmlinux.  In the scenario where kaslr is disabled and

without vmcoreinfo, crash will get the wrong MODULES/VMALLOC ranges

and cause a failure in parsing a raw RAM dumpfile.

Signed-off-by: Qianli Zhao <qianli.zhao@horizon.ai>

Signed-off-by: Lianbo Jiang <lijiang@redhat.com>

---

 arm64.c | 8 ++++++++

 1 file changed, 8 insertions(+)

diff --git a/arm64.c b/arm64.c

index 0f615cf52bef..b6b7aa11f4fe 100644

--- a/arm64.c

+++ b/arm64.c

@@ -149,6 +149,14 @@ arm64_init(int when)

 		ms = machdep->machspec;

+		/*

+		 * The st->_stext_vmlinux is needed in arm64_init(PRE_GDB) when a

+		 * dumpfile does not have vmcoreinfo and we use -m vabits_actual

+		 * option, e.g. a raw RAM dumpfile.

+		 */

+		if (ms->VA_BITS_ACTUAL)

+			st->_stext_vmlinux = UNINITIALIZED;

+

 		if (!ms->kimage_voffset && STREQ(pc->live_memsrc, "/dev/crash"))

 			ioctl(pc->mfd, DEV_CRASH_ARCH_DATA, &ms->kimage_voffset);

-- 

2.37.1