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| author | Nick Clifton <nickc@redhat.com> | 2017-06-19 14:52:36 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-06-19 14:52:36 +0100 |
| commit | bc21b167eb0106eb31d946a0eb5acfb7e4d5d8a1 (patch) | |
| tree | 593d45a9586606cc231a3778a0bbc0772f00fff4 | |
| parent | 0f6d864de2469af4223391993b430b0d45573dcb (diff) | |
| download | gdb-bc21b167eb0106eb31d946a0eb5acfb7e4d5d8a1.zip gdb-bc21b167eb0106eb31d946a0eb5acfb7e4d5d8a1.tar.gz gdb-bc21b167eb0106eb31d946a0eb5acfb7e4d5d8a1.tar.bz2 | |
Fix address violations when reading corrupt VMS records.
PR binutils/21618
* vms-alpha.c (evax_bfd_print_emh): Check for insufficient record
length.
(evax_bfd_print_eeom): Likewise.
(evax_bfd_print_egsd): Check for an overlarge record length.
(evax_bfd_print_etir): Likewise.
| -rw-r--r-- | bfd/ChangeLog | 9 | ||||
| -rw-r--r-- | bfd/vms-alpha.c | 27 |
2 files changed, 36 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index e718517..5177bc7 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,14 @@ 2017-06-19 Nick Clifton <nickc@redhat.com> + PR binutils/21618 + * vms-alpha.c (evax_bfd_print_emh): Check for insufficient record + length. + (evax_bfd_print_eeom): Likewise. + (evax_bfd_print_egsd): Check for an overlarge record length. + (evax_bfd_print_etir): Likewise. + +2017-06-19 Nick Clifton <nickc@redhat.com> + PR binutils/21612 * libieee.h (struct common_header_type): Add end_p field. * ieee.c (this_byte_and_next): Do not advance input_p beyond diff --git a/bfd/vms-alpha.c b/bfd/vms-alpha.c index 73f6976..8569868 100644 --- a/bfd/vms-alpha.c +++ b/bfd/vms-alpha.c @@ -5634,6 +5634,13 @@ evax_bfd_print_emh (FILE *file, unsigned char *rec, unsigned int rec_len) /* xgettext:c-format */ fprintf (file, _(" EMH %u (len=%u): "), subtype, rec_len); + /* PR 21618: Check for invalid lengths. */ + if (rec_len < sizeof (* emh)) + { + fprintf (file, _(" Error: The length is less than the length of an EMH record\n")); + return; + } + switch (subtype) { case EMH__C_MHD: @@ -5697,6 +5704,14 @@ evax_bfd_print_eeom (FILE *file, unsigned char *rec, unsigned int rec_len) struct vms_eeom *eeom = (struct vms_eeom *)rec; fprintf (file, _(" EEOM (len=%u):\n"), rec_len); + + /* PR 21618: Check for invalid lengths. */ + if (rec_len < sizeof (* eeom)) + { + fprintf (file, _(" Error: The length is less than the length of an EEOM record\n")); + return; + } + fprintf (file, _(" number of cond linkage pairs: %u\n"), (unsigned)bfd_getl32 (eeom->total_lps)); fprintf (file, _(" completion code: %u\n"), @@ -5786,6 +5801,12 @@ evax_bfd_print_egsd (FILE *file, unsigned char *rec, unsigned int rec_len) n, type, len); n++; + if (off + len > rec_len || off + len < off) + { + fprintf (file, _(" Error: length larger than remaining space in record\n")); + return; + } + switch (type) { case EGSD__C_PSC: @@ -6031,6 +6052,12 @@ evax_bfd_print_etir (FILE *file, const char *name, size = bfd_getl16 (etir->size); buf = rec + off + sizeof (struct vms_etir); + if (off + size > rec_len || off + size < off) + { + fprintf (file, _(" Error: length larger than remaining space in record\n")); + return; + } + /* xgettext:c-format */ fprintf (file, _(" (type: %3u, size: 4+%3u): "), type, size - 4); switch (type) |