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a50f80aef0
* Append minor version to PV so recipe checker is happy * Drop upstreamed patches * Remove changelog from CVE patches, they dont apply and are in patch log anyway (From OE-Core rev: 550085bc092d773c8c481e238d0d3210466166dc) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
122 lines
4.5 KiB
Diff
122 lines
4.5 KiB
Diff
From 30838132997e6a3cfe3ec11c58b32b22f6f6b102 Mon Sep 17 00:00:00 2001
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From: Alan Modra <amodra@gmail.com>
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Date: Thu, 20 Sep 2018 15:29:17 +0930
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Subject: [PATCH] Bug 23686, two segment faults in nm
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Fixes the bugs exposed by the testcases in the PR, plus two more bugs
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I noticed when looking at _bfd_stab_section_find_nearest_line.
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PR 23686
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* dwarf2.c (read_section): Error when attempting to malloc
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"(bfd_size_type) -1".
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* syms.c (_bfd_stab_section_find_nearest_line): Bounds check
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function_name. Bounds check reloc address. Formatting. Ensure
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.stabstr zero terminated.
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CVE: CVE-2018-17358 and CVE-2018-17359
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Upstream-Status: Backport
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Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
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---
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bfd/ChangeLog | 9 +++++++++
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bfd/dwarf2.c | 9 ++++++++-
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bfd/syms.c | 22 ++++++++++++++++------
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3 files changed, 33 insertions(+), 7 deletions(-)
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--- a/bfd/dwarf2.c
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+++ b/bfd/dwarf2.c
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@@ -527,6 +527,7 @@ read_section (bfd * abfd,
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asection *msec;
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const char *section_name = sec->uncompressed_name;
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bfd_byte *contents = *section_buffer;
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+ bfd_size_type amt;
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/* The section may have already been read. */
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if (contents == NULL)
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@@ -549,7 +550,13 @@ read_section (bfd * abfd,
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*section_size = msec->rawsize ? msec->rawsize : msec->size;
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/* Paranoia - alloc one extra so that we can make sure a string
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section is NUL terminated. */
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- contents = (bfd_byte *) bfd_malloc (*section_size + 1);
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+ amt = *section_size + 1;
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+ if (amt == 0)
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+ {
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+ bfd_set_error (bfd_error_no_memory);
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+ return FALSE;
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+ }
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+ contents = (bfd_byte *) bfd_malloc (amt);
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if (contents == NULL)
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return FALSE;
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if (syms
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--- a/bfd/syms.c
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+++ b/bfd/syms.c
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@@ -1035,6 +1035,10 @@ _bfd_stab_section_find_nearest_line (bfd
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0, strsize))
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return FALSE;
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+ /* Stab strings ought to be nul terminated. Ensure the last one
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+ is, to prevent running off the end of the buffer. */
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+ info->strs[strsize - 1] = 0;
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+
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/* If this is a relocatable object file, we have to relocate
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the entries in .stab. This should always be simple 32 bit
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relocations against symbols defined in this object file, so
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@@ -1073,7 +1077,8 @@ _bfd_stab_section_find_nearest_line (bfd
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|| r->howto->bitsize != 32
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|| r->howto->pc_relative
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|| r->howto->bitpos != 0
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- || r->howto->dst_mask != 0xffffffff)
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+ || r->howto->dst_mask != 0xffffffff
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+ || r->address * bfd_octets_per_byte (abfd) + 4 > stabsize)
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{
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_bfd_error_handler
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(_("unsupported .stab relocation"));
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@@ -1195,7 +1200,8 @@ _bfd_stab_section_find_nearest_line (bfd
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{
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nul_fun = stab;
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nul_str = str;
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- if (file_name >= (char *) info->strs + strsize || file_name < (char *) str)
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+ if (file_name >= (char *) info->strs + strsize
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+ || file_name < (char *) str)
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file_name = NULL;
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if (stab + STABSIZE + TYPEOFF < info->stabs + stabsize
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&& *(stab + STABSIZE + TYPEOFF) == (bfd_byte) N_SO)
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@@ -1206,7 +1212,8 @@ _bfd_stab_section_find_nearest_line (bfd
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directory_name = file_name;
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file_name = ((char *) str
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+ bfd_get_32 (abfd, stab + STRDXOFF));
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- if (file_name >= (char *) info->strs + strsize || file_name < (char *) str)
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+ if (file_name >= (char *) info->strs + strsize
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+ || file_name < (char *) str)
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file_name = NULL;
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}
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}
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@@ -1217,7 +1224,8 @@ _bfd_stab_section_find_nearest_line (bfd
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file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF);
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/* PR 17512: file: 0c680a1f. */
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/* PR 17512: file: 5da8aec4. */
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- if (file_name >= (char *) info->strs + strsize || file_name < (char *) str)
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+ if (file_name >= (char *) info->strs + strsize
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+ || file_name < (char *) str)
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file_name = NULL;
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break;
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@@ -1226,7 +1234,8 @@ _bfd_stab_section_find_nearest_line (bfd
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function_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF);
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if (function_name == (char *) str)
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continue;
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- if (function_name >= (char *) info->strs + strsize)
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+ if (function_name >= (char *) info->strs + strsize
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+ || function_name < (char *) str)
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function_name = NULL;
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nul_fun = NULL;
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@@ -1335,7 +1344,8 @@ _bfd_stab_section_find_nearest_line (bfd
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if (val <= offset)
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{
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file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF);
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- if (file_name >= (char *) info->strs + strsize || file_name < (char *) str)
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+ if (file_name >= (char *) info->strs + strsize
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+ || file_name < (char *) str)
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file_name = NULL;
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*pline = 0;
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}
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