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| author | Stefan Metzmacher <metze@samba.org> | 2013-05-28 12:59:32 +0200 |
|---|---|---|
| committer | Volker Lendecke <vl@samba.org> | 2013-06-03 10:21:27 +0200 |
| commit | e19d46f7e31a32e2b5ae3ec05e13f32b8ac2109d (patch) | |
| tree | d0f6a042d849fc0a98fc49058ed7b38743bd3767 /lib/tdb/common | |
| parent | a07ba17e0c91d726416db946e6f65b064b2d17ec (diff) | |
| download | samba-e19d46f7e31a32e2b5ae3ec05e13f32b8ac2109d.tar.gz samba-e19d46f7e31a32e2b5ae3ec05e13f32b8ac2109d.tar.bz2 samba-e19d46f7e31a32e2b5ae3ec05e13f32b8ac2109d.zip | |
tdb: add overflow/ENOSPC handling to tdb_expand_file()
Pair-Programmed-With: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'lib/tdb/common')
| -rw-r--r-- | lib/tdb/common/io.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/tdb/common/io.c b/lib/tdb/common/io.c index 44ef7289a6..d17764008f 100644 --- a/lib/tdb/common/io.c +++ b/lib/tdb/common/io.c @@ -294,7 +294,14 @@ static int tdb_expand_file(struct tdb_context *tdb, tdb_off_t size, tdb_off_t ad return -1; } - new_size = size + addition; + if (!tdb_add_off_t(size, addition, &new_size)) { + tdb->ecode = TDB_ERR_OOM; + TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file write " + "overflow detected current size[%u] addition[%u]!\n", + (unsigned)size, (unsigned)addition)); + errno = ENOSPC; + return -1; + } if (ftruncate(tdb->fd, new_size) == -1) { char b = 0; @@ -308,6 +315,7 @@ static int tdb_expand_file(struct tdb_context *tdb, tdb_off_t size, tdb_off_t ad errno = ENOSPC; } if (written != 1) { + tdb->ecode = TDB_ERR_OOM; TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file to %u failed (%s)\n", (unsigned)new_size, strerror(errno))); return -1; @@ -327,12 +335,14 @@ static int tdb_expand_file(struct tdb_context *tdb, tdb_off_t size, tdb_off_t ad } if (written == 0) { /* give up, trying to provide a useful errno */ + tdb->ecode = TDB_ERR_OOM; TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file write " "returned 0 twice: giving up!\n")); errno = ENOSPC; return -1; } if (written == -1) { + tdb->ecode = TDB_ERR_OOM; TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file write of " "%u bytes failed (%s)\n", (int)n, strerror(errno))); |