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| author | Nick Clifton <nickc@redhat.com> | 2016-12-05 13:35:50 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2016-12-05 13:35:50 +0000 |
| commit | a55c9876bb111fd301b4762cf501de0040b8f9db (patch) | |
| tree | 70885a7047dbd05d57638c0a2f7462f3b6ef044a /bfd | |
| parent | 88add6d8e794073758b5398c52bbb76ab40a2923 (diff) | |
| download | gdb-a55c9876bb111fd301b4762cf501de0040b8f9db.zip gdb-a55c9876bb111fd301b4762cf501de0040b8f9db.tar.gz gdb-a55c9876bb111fd301b4762cf501de0040b8f9db.tar.bz2 | |
Fix seg-fault attempting to strip a corrupt binary.
PR binutils/20922
* elf.c (find_link): Check for null headers before attempting to
match them.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 4 | ||||
| -rw-r--r-- | bfd/elf.c | 8 |
2 files changed, 11 insertions, 1 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 3d9cd9e..b84dfab 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,9 @@ 2016-12-05 Nick Clifton <nickc@redhat.com> + PR binutils/20922 + * elf.c (find_link): Check for null headers before attempting to + match them. + PR ld/20925 * aoutx.h (aout_link_add_symbols): Replace BFD_ASSERT with return FALSE. @@ -1271,13 +1271,19 @@ find_link (const bfd * obfd, const Elf_Internal_Shdr * iheader, const unsigned i Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd); unsigned int i; - if (section_match (oheaders[hint], iheader)) + BFD_ASSERT (iheader != NULL); + + /* See PR 20922 for a reproducer of the NULL test. */ + if (oheaders[hint] != NULL + && section_match (oheaders[hint], iheader)) return hint; for (i = 1; i < elf_numsections (obfd); i++) { Elf_Internal_Shdr * oheader = oheaders[i]; + if (oheader == NULL) + continue; if (section_match (oheader, iheader)) /* FIXME: Do we care if there is a potential for multiple matches ? */ |