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(From OE-Core rev: 88cbf5eb4a075e677b1f9e6444ec6378a5949978) Signed-off-by: Deepthi Hemraj <Deepthi.Hemraj@windriver.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
58 lines
2.0 KiB
Diff
58 lines
2.0 KiB
Diff
From: Alan Modra <amodra@gmail.com>
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Date: Tue, 20 Dec 2022 13:17:03 +0000 (+1030)
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Subject: PR29922, SHT_NOBITS section avoids section size sanity check
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X-Git-Tag: binutils-2_40~202
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X-Git-Url: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff_plain;h=8f2c64de86bc3d7556121fe296dd679000283931
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PR29922, SHT_NOBITS section avoids section size sanity check
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PR 29922
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* dwarf2.c (find_debug_info): Ignore sections without
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SEC_HAS_CONTENTS.
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Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff_plain;h=8f2c64de86bc3d7556121fe296dd679000283931]
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CVE: CVE-2022-48064
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Signed-off-by: Deepthi Hemraj <Deepthi.Hemraj@windriver.com>
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---
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diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
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index 95f45708e9d..0cd8152ee6e 100644
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--- a/bfd/dwarf2.c
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+++ b/bfd/dwarf2.c
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@@ -4831,16 +4831,19 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
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{
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look = debug_sections[debug_info].uncompressed_name;
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msec = bfd_get_section_by_name (abfd, look);
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- if (msec != NULL)
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+ /* Testing SEC_HAS_CONTENTS is an anti-fuzzer measure. Of
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+ course debug sections always have contents. */
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+ if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0)
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return msec;
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look = debug_sections[debug_info].compressed_name;
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msec = bfd_get_section_by_name (abfd, look);
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- if (msec != NULL)
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+ if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0)
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return msec;
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for (msec = abfd->sections; msec != NULL; msec = msec->next)
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- if (startswith (msec->name, GNU_LINKONCE_INFO))
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+ if ((msec->flags & SEC_HAS_CONTENTS) != 0
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+ && startswith (msec->name, GNU_LINKONCE_INFO))
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return msec;
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return NULL;
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@@ -4848,6 +4851,9 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
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for (msec = after_sec->next; msec != NULL; msec = msec->next)
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{
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+ if ((msec->flags & SEC_HAS_CONTENTS) == 0)
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+ continue;
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+
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look = debug_sections[debug_info].uncompressed_name;
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if (strcmp (msec->name, look) == 0)
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return msec;
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