From 4483bf143ddfee9ec07aed8f124559b00f757d9a Mon Sep 17 00:00:00 2001 From: Volker Lendecke Date: Thu, 30 May 2013 14:52:59 +0200 Subject: tdb: Add overflow-checking tdb_add_off_t Signed-off-by: Volker Lendecke Reviewed-by: Rusty Russell --- lib/tdb/common/tdb.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'lib/tdb/common/tdb.c') diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c index a2ae187f57..6256a05d04 100644 --- a/lib/tdb/common/tdb.c +++ b/lib/tdb/common/tdb.c @@ -1000,6 +1000,17 @@ bool tdb_write_all(int fd, const void *buf, size_t count) return true; } +bool tdb_add_off_t(tdb_off_t a, tdb_off_t b, tdb_off_t *pret) +{ + tdb_off_t ret = a + b; + + if ((ret < a) || (ret < b)) { + return false; + } + *pret = ret; + return true; +} + #ifdef TDB_TRACE static void tdb_trace_write(struct tdb_context *tdb, const char *str) { -- cgit