74f9c62794
Signed-off-by: Qiumiao Zhang <zhangqiumiao1@huawei.com> (cherry picked from commit c141a13130da5dca205b607533751a6ba6c9581e)
38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
From 98ad84328dcabfa603dcf5bd217570aa6b4bdd99 Mon Sep 17 00:00:00 2001
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From: B Horn <b@horn.uk>
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Date: Thu, 7 Nov 2024 06:00:36 +0000
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Subject: [PATCH 35/73] 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 acc6ccad6..de8c3aa8d 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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@@ -623,6 +623,9 @@ 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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/* Find the target segment. */
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for (seg = mod->segment; seg; seg = seg->next)
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if (seg->section == s->sh_info)
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--
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2.33.0
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