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| author | Nick Clifton <nickc@redhat.com> | 2021-04-30 12:11:35 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2021-04-30 12:11:35 +0100 |
| commit | bceb87ef4da7948eb9f39584fb5b4a62f9ed4846 (patch) | |
| tree | ae2633884fa07dec3bcc5ed5a25e78d29e9de9f0 /bfd | |
| parent | 5536f0cc62309de740e678da87c11039dd7bfb35 (diff) | |
| download | gdb-bceb87ef4da7948eb9f39584fb5b4a62f9ed4846.zip gdb-bceb87ef4da7948eb9f39584fb5b4a62f9ed4846.tar.gz gdb-bceb87ef4da7948eb9f39584fb5b4a62f9ed4846.tar.bz2 | |
Fix illegal memory access when parsing a corrupt PE format file.
PR 27795
* coff-rs6000.c (_bfd_xcoff_read_ar_hdr): Check for invalid name
lengths.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 6 | ||||
| -rw-r--r-- | bfd/coff-rs6000.c | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 4bdee1c..cd904da 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +2021-04-30 Nick Clifton <nickc@redhat.com> + + PR 27795 + * coff-rs6000.c (_bfd_xcoff_read_ar_hdr): Check for invalid name + lengths. + 2021-04-29 Nick Clifton <nickc@redhat.com> PR 27793 diff --git a/bfd/coff-rs6000.c b/bfd/coff-rs6000.c index 491efba..0745421 100644 --- a/bfd/coff-rs6000.c +++ b/bfd/coff-rs6000.c @@ -1619,6 +1619,8 @@ _bfd_xcoff_read_ar_hdr (bfd *abfd) return NULL; GET_VALUE_IN_FIELD (namlen, hdr.namlen, 10); + if (namlen > bfd_get_file_size (abfd)) + return NULL; amt = sizeof (struct areltdata) + SIZEOF_AR_HDR + namlen + 1; ret = (struct areltdata *) bfd_malloc (amt); if (ret == NULL) @@ -1646,6 +1648,8 @@ _bfd_xcoff_read_ar_hdr (bfd *abfd) return NULL; GET_VALUE_IN_FIELD (namlen, hdr.namlen, 10); + if (namlen > bfd_get_file_size (abfd)) + return NULL; amt = sizeof (struct areltdata) + SIZEOF_AR_HDR_BIG + namlen + 1; ret = (struct areltdata *) bfd_malloc (amt); if (ret == NULL) |