b9f070c2f2
Resolves: CVE-2024-45781 CVE-2024-45783 CVE-2024-45778 Resolves: CVE-2024-45775 CVE-2024-45780 CVE-2024-45774 Resolves: CVE-2025-0690 CVE-2025-1118 CVE-2024-45782 Resolves: CVE-2025-0624 CVE-2024-45779 CVE-2024-45776 Resolves: CVE-2025-0622 CVE-2025-0677 Resolves: #RHEL-80691 Resolves: #RHEL-80690 Resolves: #RHEL-80689 Resolves: #RHEL-80687 Resolves: #RHEL-80686 Signed-off-by: Leo Sandoval <lsandova@redhat.com> Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>
35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: B Horn <b@horn.uk>
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Date: Tue, 11 Feb 2025 17:01:26 -0600
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Subject: [PATCH] kern/dl: Check for the SHF_INFO_LINK flag in
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grub_dl_relocate_symbols()
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The grub_dl_relocate_symbols() iterates through the sections in
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an ELF looking for relocation sections. According to the spec [1]
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the SHF_INFO_LINK flag should be set if the sh_info field is meant
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to be a section index.
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[1] https://refspecs.linuxbase.org/elf/gabi4+/ch4.sheader.html
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Reported-by: B Horn <b@horn.uk>
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Signed-off-by: B Horn <b@horn.uk>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/kern/dl.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c
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index fe7c3b940..cb49bdc4b 100644
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--- a/grub-core/kern/dl.c
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+++ b/grub-core/kern/dl.c
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@@ -681,6 +681,9 @@ grub_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
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grub_dl_segment_t seg;
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grub_err_t err;
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+ if (!(s->sh_flags & SHF_INFO_LINK))
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+ continue;
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+
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seg = grub_dl_find_segment(mod, s->sh_info);
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if (!seg)
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continue;
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