38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
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From b38e562a4c907e08171c76b8b2def8464d5a104a Mon Sep 17 00:00:00 2001
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From: Mark Wielaard <mark@klomp.org>
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Date: Sun, 9 Feb 2025 00:07:13 +0100
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Subject: [PATCH] readelf: Handle NULL phdr in handle_dynamic_symtab
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A corrupt ELF file can have broken program headers, in which case
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gelf_getphdr returns NULL. This could crash handle_dynamic_symtab
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while searching for the PT_DYNAMIC phdr. Fix this by checking whether
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gelf_phdr returns NULL.
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* src/readelf.c (handle_dynamic_symtab): Check whether
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gelf_getphdr returns NULL.
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https://sourceware.org/bugzilla/show_bug.cgi?id=32655
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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---
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src/readelf.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/readelf.c b/src/readelf.c
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index c43fda35..21b92a08 100644
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--- a/src/readelf.c
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+++ b/src/readelf.c
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@@ -2912,7 +2912,7 @@ handle_dynamic_symtab (Ebl *ebl)
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for (size_t i = 0; i < phnum; ++i)
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{
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phdr = gelf_getphdr (ebl->elf, i, &phdr_mem);
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- if (phdr->p_type == PT_DYNAMIC)
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+ if (phdr == NULL || phdr->p_type == PT_DYNAMIC)
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break;
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}
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if (phdr == NULL)
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--
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2.33.0
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