diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-07-20 14:09:34 +0200 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-07-20 15:04:47 +0200 |
commit | 367cbfaae87c1f539c729b0653d920701beac3be (patch) | |
tree | 232077cd854cc757784383b56abcde8383b006dd /src/internal.h | |
parent | cac9b26874d60aa17c7cabe46d33e9114b24885d (diff) |
src: stricter netlink attribute length validation
If the kernel sends us different data length for a given attribute,
stop further processing and indicate that an ABI breakage has ocurred.
This is an example of the (hypothetical) message that is shown in that
case:
nf_tables kernel ABI is broken, contact your vendor.
table.c:214 reason: Numerical result out of range
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/internal.h')
-rw-r--r-- | src/internal.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/internal.h b/src/internal.h index b8ed616..7b848db 100644 --- a/src/internal.h +++ b/src/internal.h @@ -211,4 +211,13 @@ void __nft_assert_fail(uint16_t attr, const char *filename, int line); nft_assert(data, attr, _validate_array[_attr] == _data_len); \ }) +#define __noreturn __attribute__((__noreturn__)) + +void __noreturn __abi_breakage(const char *file, int line, const char *reason); + +#include <string.h> + +#define abi_breakage() \ + __abi_breakage(__FILE__, __LINE__, strerror(errno)); + #endif |