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author | Florian Weimer <fweimer@redhat.com> | 2017-06-21 22:43:57 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2017-06-21 22:43:57 +0200 |
commit | 4dd8e7c0ce5ecc7f65e33e60ad2f717b31de32ec (patch) | |
tree | bfc9688f34dfc949e8da77d0ec05b684ff64e86f /malloc/alloc_buffer_create_failure.c | |
parent | 11ffcacb64a939c10cfc713746b8ec88837f5c4a (diff) | |
download | glibc-4dd8e7c0ce5ecc7f65e33e60ad2f717b31de32ec.zip glibc-4dd8e7c0ce5ecc7f65e33e60ad2f717b31de32ec.tar.gz glibc-4dd8e7c0ce5ecc7f65e33e60ad2f717b31de32ec.tar.bz2 |
Implement allocation buffers for internal use
This commit adds fixed-size allocation buffers. The primary use
case is in NSS modules, where dynamically sized data is stored
in a fixed-size buffer provided by the caller.
Other uses include a replacement of mempcpy cascades (which is
safer due to the size checking inherent to allocation buffers).
Diffstat (limited to 'malloc/alloc_buffer_create_failure.c')
-rw-r--r-- | malloc/alloc_buffer_create_failure.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/malloc/alloc_buffer_create_failure.c b/malloc/alloc_buffer_create_failure.c new file mode 100644 index 0000000..5ffba22 --- /dev/null +++ b/malloc/alloc_buffer_create_failure.c @@ -0,0 +1,31 @@ +/* Terminate the process as the result of an invalid allocation buffer. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <alloc_buffer.h> +#include <stdio.h> + +void +__libc_alloc_buffer_create_failure (void *start, size_t size) +{ + char buf[200]; + __snprintf (buf, sizeof (buf), "Fatal glibc error: " + "invalid allocation buffer of size %zu\n", + size); + __libc_fatal (buf); +} +libc_hidden_def (__libc_alloc_buffer_create_failure) |