kexec-tools/kexec-tools-2.0.22-makedumpfile-check-for-invalid-physical-address-proc-kcore-when-making-ELF-dumpfile.patch
Tao Liu 50bb8b701f check for invalid physical address of /proc/kcore when making ELF dumpfile
Backport from upstream.

commit 9a6f589d99dcef114c89fde992157f5467028c8f
Author: Tao Liu <ltao@redhat.com>
Date:   Fri Jun 18 18:28:04 2021 +0800

    [PATCH] check for invalid physical address of /proc/kcore when making ELF dumpfile

    Previously when executing makedumpfile with -E option against
    /proc/kcore, makedumpfile will fail:

      # makedumpfile -E -d 31 /proc/kcore kcore.dump
      ...
      write_elf_load_segment: Can't convert physaddr(ffffffffffffffff) to an offset.

      makedumpfile Failed.

    It's because /proc/kcore contains PT_LOAD program headers which have
    physaddr (0xffffffffffffffff).  With -E option, makedumpfile will
    try to convert the physaddr to an offset and fails.

    Skip the PT_LOAD program headers which have such physaddr.

    Signed-off-by: Tao Liu <ltao@redhat.com>
    Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>

Signed-off-by: Tao Liu <ltao@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
2021-06-28 15:52:21 +08:00

44 lines
1.4 KiB
Diff

From 9a6f589d99dcef114c89fde992157f5467028c8f Mon Sep 17 00:00:00 2001
From: Tao Liu <ltao@redhat.com>
Date: Fri, 18 Jun 2021 18:28:04 +0800
Subject: [PATCH] check for invalid physical address of /proc/kcore
when making ELF dumpfile
Previously when executing makedumpfile with -E option against
/proc/kcore, makedumpfile will fail:
# makedumpfile -E -d 31 /proc/kcore kcore.dump
...
write_elf_load_segment: Can't convert physaddr(ffffffffffffffff) to an offset.
makedumpfile Failed.
It's because /proc/kcore contains PT_LOAD program headers which have
physaddr (0xffffffffffffffff). With -E option, makedumpfile will
try to convert the physaddr to an offset and fails.
Skip the PT_LOAD program headers which have such physaddr.
Signed-off-by: Tao Liu <ltao@redhat.com>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
---
makedumpfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/makedumpfile-1.6.9/makedumpfile.c b/makedumpfile-1.6.9/makedumpfile.c
index 894c88e..fcb571f 100644
--- a/makedumpfile-1.6.9/makedumpfile.c
+++ b/makedumpfile-1.6.9/makedumpfile.c
@@ -7764,7 +7764,7 @@ write_elf_pages_cyclic(struct cache_data *cd_header, struct cache_data *cd_page)
if (!get_phdr_memory(i, &load))
return FALSE;
- if (load.p_type != PT_LOAD)
+ if (load.p_type != PT_LOAD || load.p_paddr == NOT_PADDR)
continue;
off_memory= load.p_offset;
--
2.29.2