diff options
Diffstat (limited to 'elf/readlib.c')
| -rw-r--r-- | elf/readlib.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/elf/readlib.c b/elf/readlib.c index abd380b9b7..580d802301 100644 --- a/elf/readlib.c +++ b/elf/readlib.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999 and Jakub Jelinek <jakub@redhat.com>, 1999. @@ -92,10 +92,22 @@ process_file (const char *file_name, const char *lib, int *flag, char **soname, if (fstat (fileno (file), &statbuf) < 0) { error (0, 0, _("Cannot fstat file %s.\n"), file_name); + fclose (file); + return 1; + } + + /* Check that the file is large enough so that we can access the + information. We're only checking the size of the headers here. */ + if (statbuf.st_size < sizeof (struct exec) + || statbuf.st_size < sizeof (ElfW(Ehdr))) + { + error (0, 0, _("File %s is too small, not checked."), file_name); + fclose (file); return 1; } - file_contents = mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, fileno (file), 0); + file_contents = mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, + fileno (file), 0); if (file_contents == MAP_FAILED) { error (0, 0, _("Cannot mmap file %s.\n"), file_name); @@ -108,7 +120,7 @@ process_file (const char *file_name, const char *lib, int *flag, char **soname, if (N_MAGIC (*aout_header) == ZMAGIC || N_MAGIC (*aout_header) == QMAGIC) { - /* Aout files don't have a soname, just return the the name + /* Aout files don't have a soname, just return the name including the major number. */ char *copy, *major, *dot; copy = xstrdup (lib); |