From: Michael Forney <mforney@mforney.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] objtool: Check for gelf_update_rel[a] failures
Date: Sat, 8 May 2021 17:01:02 -0700 [thread overview]
Message-ID: <20210509000103.11008-1-mforney@mforney.org> (raw)
Otherwise, if these fail we end up with garbage data in the
.rela.orc_unwind_ip section, leading to errors like
ld: fs/squashfs/namei.o: bad reloc symbol index (0x7f16 >= 0x12) for offset 0x7f16d5c82cc8 in section `.orc_unwind_ip'
Signed-off-by: Michael Forney <mforney@mforney.org>
---
tools/objtool/elf.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index d08f5f3670f8..b396ee4ab85d 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -953,7 +953,10 @@ static int elf_rebuild_rel_reloc_section(struct section *sec, int nr)
list_for_each_entry(reloc, &sec->reloc_list, list) {
reloc->rel.r_offset = reloc->offset;
reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);
- gelf_update_rel(sec->data, idx, &reloc->rel);
+ if (!gelf_update_rel(sec->data, idx, &reloc->rel)) {
+ WARN_ELF("gelf_update_rel");
+ return -1;
+ }
idx++;
}
@@ -985,7 +988,10 @@ static int elf_rebuild_rela_reloc_section(struct section *sec, int nr)
reloc->rela.r_offset = reloc->offset;
reloc->rela.r_addend = reloc->addend;
reloc->rela.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);
- gelf_update_rela(sec->data, idx, &reloc->rela);
+ if (!gelf_update_rela(sec->data, idx, &reloc->rela)) {
+ WARN_ELF("gelf_update_rela");
+ return -1;
+ }
idx++;
}
--
2.31.1
next reply other threads:[~2021-05-09 0:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-09 0:01 Michael Forney [this message]
2021-05-09 0:01 ` [PATCH 2/2] objtool: Update section header before relocations Michael Forney
2021-06-29 7:55 ` Miroslav Benes
2021-10-13 21:42 ` [tip: objtool/urgent] " tip-bot2 for Michael Forney
2021-06-28 7:52 ` [PATCH 1/2] objtool: Check for gelf_update_rel[a] failures Michael Forney
2021-06-28 8:24 ` Peter Zijlstra
2021-06-29 17:12 ` Josh Poimboeuf
2021-08-28 19:04 ` Michael Forney
2021-10-06 16:58 ` Michael Forney
2021-10-07 3:16 ` Josh Poimboeuf
2021-06-29 7:54 ` Miroslav Benes
2021-10-13 21:42 ` [tip: objtool/urgent] " tip-bot2 for Michael Forney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210509000103.11008-1-mforney@mforney.org \
--to=mforney@mforney.org \
--cc=jpoimboe@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.