From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Mon, 6 Feb 2023 22:25:08 +0000 (+0100)
Subject: Initialize reglocs for VMCOREINFO
X-Git-Tag: elfutils-0.189~29
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6cb1547e812e9c2eeca698b38d8ab2785b7a7abf;p=thirdparty%2Felfutils.git

Initialize reglocs for VMCOREINFO

MSan complains:

    Uninitialized value was created by an allocation of 'reglocs' in the stack frame
       #0 0x562d35c686f0 in handle_core_note elfutils/src/readelf.c:12674:3
       #const Ebl_Register_Location *reglocs;
    ==1006199==WARNING: MemorySanitizer: use-of-uninitialized-value
       #0 0x562d35c68a2a in handle_core_note elfutils/src/readelf.c:12692:11
       #colno = handle_core_registers (ebl, ebl->elf, desc + regs_offset,
       #                               reglocs, nregloc);

Strictly speaking, this is not a problem, because nregloc == 0, but for
other note types we initialize it anyway, so do it here as well.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---

diff --git a/backends/linux-core-note.c b/backends/linux-core-note.c
index 9faae4c35..238ec16d4 100644
--- a/backends/linux-core-note.c
+++ b/backends/linux-core-note.c
@@ -239,6 +239,7 @@ EBLHOOK(core_note) (const GElf_Nhdr *nhdr, const char *name,
 	return 0;
       *regs_offset = 0;
       *nregloc = 0;
+      *reglocs = NULL;
       *nitems = 1;
       *items = vmcoreinfo_items;
       return 1;