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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-08-29 10:40:03 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-08-29 10:40:03 -0700 |
| commit | 37c0b6ee65941d54fa8064c21b39f97fdc318156 (patch) | |
| tree | b11d475a03364db93860b3ea9a9a267af94fdbbd /bfd | |
| parent | 7ef3addbe195b6283d0baf59e081146dfb211c97 (diff) | |
| download | gdb-37c0b6ee65941d54fa8064c21b39f97fdc318156.zip gdb-37c0b6ee65941d54fa8064c21b39f97fdc318156.tar.gz gdb-37c0b6ee65941d54fa8064c21b39f97fdc318156.tar.bz2 | |
x86: Check valid PLT sections before checking dynamic relocations
Update x86 get_synthetic_symtab to check valid PLT sections before
checking dynamic relocations and free invalid PLT section contents.
* elf32-i386.c (elf_i386_get_synthetic_symtab): Check valid PLT
sections before checking dynamic relocations and free invalid
PLT section contents.
* elf64-x86-64.c (elf_x86_64_get_synthetic_symtab): Likewise.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 7 | ||||
| -rw-r--r-- | bfd/elf32-i386.c | 25 | ||||
| -rw-r--r-- | bfd/elf64-x86-64.c | 25 |
3 files changed, 35 insertions, 22 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 351fe83..21b01b7 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,10 @@ +2017-08-29 H.J. Lu <hongjiu.lu@intel.com> + + * elf32-i386.c (elf_i386_get_synthetic_symtab): Check valid PLT + sections before checking dynamic relocations and free invalid + PLT section contents. + * elf64-x86-64.c (elf_x86_64_get_synthetic_symtab): Likewise. + 2017-08-28 H.J. Lu <hongjiu.lu@intel.com> * elf-bfd.h (_bfd_elf_ifunc_get_synthetic_symtab): Removed. diff --git a/bfd/elf32-i386.c b/bfd/elf32-i386.c index 05ba2c3..31ef02a 100644 --- a/bfd/elf32-i386.c +++ b/bfd/elf32-i386.c @@ -6326,16 +6326,6 @@ elf_i386_get_synthetic_symtab (bfd *abfd, if (relsize <= 0) return -1; - dynrelbuf = (arelent **) bfd_malloc (relsize); - if (dynrelbuf == NULL) - return -1; - - dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, - dynsyms); - - /* Sort the relocs by address. */ - qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); - non_lazy_plt = NULL; /* Silence GCC 6. */ lazy_plt = NULL; @@ -6447,7 +6437,10 @@ elf_i386_get_synthetic_symtab (bfd *abfd, } if (plt_type == plt_unknown) - continue; + { + free (plt_contents); + continue; + } plts[j].sec = plt; plts[j].type = plt_type; @@ -6487,6 +6480,16 @@ elf_i386_get_synthetic_symtab (bfd *abfd, if (count == 0) return -1; + dynrelbuf = (arelent **) bfd_malloc (relsize); + if (dynrelbuf == NULL) + return -1; + + dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, + dynsyms); + + /* Sort the relocs by address. */ + qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); + size = count * sizeof (asymbol); /* Allocate space for @plt suffixes. */ diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index 25ce295..ba7c595 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -6722,16 +6722,6 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd, if (relsize <= 0) return -1; - dynrelbuf = (arelent **) bfd_malloc (relsize); - if (dynrelbuf == NULL) - return -1; - - dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, - dynsyms); - - /* Sort the relocs by address. */ - qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); - if (get_elf_x86_64_backend_data (abfd)->os == is_normal) { lazy_plt = &elf_x86_64_lazy_plt; @@ -6842,7 +6832,10 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd, } if (plt_type == plt_unknown) - continue; + { + free (plt_contents); + continue; + } plts[j].sec = plt; plts[j].type = plt_type; @@ -6879,6 +6872,16 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd, if (count == 0) return -1; + dynrelbuf = (arelent **) bfd_malloc (relsize); + if (dynrelbuf == NULL) + return -1; + + dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, + dynsyms); + + /* Sort the relocs by address. */ + qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); + size = count * sizeof (asymbol); /* Allocate space for @plt suffixes. */ |