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4537f28311
Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=3d3af4ba39e892b1c544d667ca241846bc3df386] (From OE-Core rev: 4d4732c2e295fea610d266fa12bae3cc01f93dfa) Signed-off-by: Chaitanya Vadrevu <chaitanya.vadrevu@ni.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
59 lines
2.2 KiB
Diff
59 lines
2.2 KiB
Diff
From 2f7426b9bb2d2450b32cad3d79fab9abe3ec42bb Mon Sep 17 00:00:00 2001
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From: Alan Modra <amodra@gmail.com>
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Date: Sun, 4 Dec 2022 22:15:40 +1030
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Subject: [PATCH] PR29846, segmentation fault in objdump.c compare_symbols
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Fixes a fuzzed object file problem where plt relocs were manipulated
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in such a way that two synthetic symbols were generated at the same
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plt location. Won't occur in real object files.
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PR 29846
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PR 20337
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* objdump.c (compare_symbols): Test symbol flags to exclude
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section and synthetic symbols before attempting to check flavour.
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Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=3d3af4ba39e892b1c544d667ca241846bc3df386]
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CVE: CVE-2022-47695
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Signed-off-by: Chaitanya Vadrevu <chaitanya.vadrevu@ni.com>
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---
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binutils/objdump.c | 23 ++++++++++-------------
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1 file changed, 10 insertions(+), 13 deletions(-)
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diff --git a/binutils/objdump.c b/binutils/objdump.c
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index 08a0fe521d8..21f75f4db40 100644
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--- a/binutils/objdump.c
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+++ b/binutils/objdump.c
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@@ -1165,20 +1165,17 @@ compare_symbols (const void *ap, const void *bp)
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return 1;
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}
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- if (bfd_get_flavour (bfd_asymbol_bfd (a)) == bfd_target_elf_flavour
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+ /* Sort larger size ELF symbols before smaller. See PR20337. */
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+ bfd_vma asz = 0;
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+ if ((a->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0
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+ && bfd_get_flavour (bfd_asymbol_bfd (a)) == bfd_target_elf_flavour)
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+ asz = ((elf_symbol_type *) a)->internal_elf_sym.st_size;
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+ bfd_vma bsz = 0;
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+ if ((b->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0
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&& bfd_get_flavour (bfd_asymbol_bfd (b)) == bfd_target_elf_flavour)
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- {
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- bfd_vma asz, bsz;
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-
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- asz = 0;
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- if ((a->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0)
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- asz = ((elf_symbol_type *) a)->internal_elf_sym.st_size;
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- bsz = 0;
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- if ((b->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0)
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- bsz = ((elf_symbol_type *) b)->internal_elf_sym.st_size;
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- if (asz != bsz)
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- return asz > bsz ? -1 : 1;
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- }
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+ bsz = ((elf_symbol_type *) b)->internal_elf_sym.st_size;
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+ if (asz != bsz)
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+ return asz > bsz ? -1 : 1;
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/* Symbols that start with '.' might be section names, so sort them
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after symbols that don't start with '.'. */
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