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226c2fd1f7
Source: git://sourceware.org/git/binutils-gdb.git
MR: 74166
Type: Security Fix
Disposition: Backport from binutils-2_29
ChangeID: d614742d33a55da6cafede60cd171766afb0aa1d
Description:
PR 21414, null pointer deref of _bfd_elf_large_com_section sym
PR 21414
* section.c (GLOBAL_SYM_INIT): Make available in bfd.h.
* elf.c (lcomm_sym): New.
(_bfd_elf_large_com_section): Use lcomm_sym section symbol.
* bfd-in2.h: Regenerate.
Affects: <= 2.29
Author: Alan Modra <amodra@gmail.com>
(From OE-Core rev: 0d6e08ffc4760947653ad9368d594074d506f697)
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Reviewed-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
115 lines
4.1 KiB
Diff
115 lines
4.1 KiB
Diff
commit 7eacd66b086cabb1daab20890d5481894d4f56b2
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Author: Alan Modra <amodra@gmail.com>
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Date: Sun Apr 23 15:21:11 2017 +0930
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PR 21414, null pointer deref of _bfd_elf_large_com_section sym
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PR 21414
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* section.c (GLOBAL_SYM_INIT): Make available in bfd.h.
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* elf.c (lcomm_sym): New.
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(_bfd_elf_large_com_section): Use lcomm_sym section symbol.
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* bfd-in2.h: Regenerate.
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Upstream-Status: Backport
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CVE: CVE-2017-8394
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Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
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Index: git/bfd/bfd-in2.h
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===================================================================
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--- git.orig/bfd/bfd-in2.h 2017-09-20 12:54:44.847475928 +0530
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+++ git/bfd/bfd-in2.h 2017-09-20 12:54:44.903476171 +0530
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@@ -1805,6 +1805,18 @@
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{ NULL }, { NULL } \
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}
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+/* We use a macro to initialize the static asymbol structures because
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+ traditional C does not permit us to initialize a union member while
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+ gcc warns if we don't initialize it.
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+ the_bfd, name, value, attr, section [, udata] */
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+#ifdef __STDC__
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+#define GLOBAL_SYM_INIT(NAME, SECTION) \
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+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
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+#else
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+#define GLOBAL_SYM_INIT(NAME, SECTION) \
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+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
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+#endif
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+
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void bfd_section_list_clear (bfd *);
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asection *bfd_get_section_by_name (bfd *abfd, const char *name);
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Index: git/bfd/section.c
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===================================================================
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--- git.orig/bfd/section.c 2017-09-20 12:54:44.847475928 +0530
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+++ git/bfd/section.c 2017-09-20 12:54:44.903476171 +0530
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@@ -738,20 +738,20 @@
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. { NULL }, { NULL } \
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. }
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.
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+.{* We use a macro to initialize the static asymbol structures because
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+. traditional C does not permit us to initialize a union member while
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+. gcc warns if we don't initialize it.
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+. the_bfd, name, value, attr, section [, udata] *}
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+.#ifdef __STDC__
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+.#define GLOBAL_SYM_INIT(NAME, SECTION) \
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+. { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
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+.#else
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+.#define GLOBAL_SYM_INIT(NAME, SECTION) \
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+. { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
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+.#endif
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+.
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*/
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-/* We use a macro to initialize the static asymbol structures because
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- traditional C does not permit us to initialize a union member while
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- gcc warns if we don't initialize it. */
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- /* the_bfd, name, value, attr, section [, udata] */
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-#ifdef __STDC__
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-#define GLOBAL_SYM_INIT(NAME, SECTION) \
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- { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
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-#else
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-#define GLOBAL_SYM_INIT(NAME, SECTION) \
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- { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
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-#endif
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-
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/* These symbols are global, not specific to any BFD. Therefore, anything
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that tries to change them is broken, and should be repaired. */
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Index: git/bfd/ChangeLog
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===================================================================
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--- git.orig/bfd/ChangeLog 2017-09-20 12:54:44.735475444 +0530
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+++ git/bfd/ChangeLog 2017-09-20 12:54:44.903476171 +0530
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@@ -102,6 +102,14 @@
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* readelf.c (process_mips_specific): Remove null GOT data check.
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2017-04-23 Alan Modra <amodra@gmail.com>
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+
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+ PR 21414
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+ * section.c (GLOBAL_SYM_INIT): Make available in bfd.h.
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+ * elf.c (lcomm_sym): New.
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+ (_bfd_elf_large_com_section): Use lcomm_sym section symbol.
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+ * bfd-in2.h: Regenerate.
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+
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+2017-04-23 Alan Modra <amodra@gmail.com>
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PR 21412
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* elf-bfd.h (struct elf_backend_data <get_reloc_section>): Change
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Index: git/bfd/elf.c
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===================================================================
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--- git.orig/bfd/elf.c 2017-09-20 12:54:44.847475928 +0530
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+++ git/bfd/elf.c 2017-09-20 13:00:22.636091768 +0530
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@@ -10986,9 +10986,11 @@
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/* It is only used by x86-64 so far.
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??? This repeats *COM* id of zero. sec->id is supposed to be unique,
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- but current usage would allow all of _bfd_std_section to be zero. t*/
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+ but current usage would allow all of _bfd_std_section to be zero. */
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+static const asymbol lcomm_sym
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+ = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
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asection _bfd_elf_large_com_section
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- = BFD_FAKE_SECTION (_bfd_elf_large_com_section, NULL,
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+ = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
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"LARGE_COMMON", 0, SEC_IS_COMMON);
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void
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