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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-06-22 13:08:02 +0400 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-06-22 13:08:02 +0400 |
| commit | 0e0497c0c017664994819f4602dc07fd95896c52 (patch) | |
| tree | d6a70d29e5eae6ca9cf3ca197db9f0ab8a3b5e51 /drivers/md/dm-mpath.c | |
| parent | f234012f52a37e48f2330e1ca2df69800e797c3b (diff) | |
| download | linux-0e0497c0c017664994819f4602dc07fd95896c52.tar.xz | |
dm mpath: validate table argument count
The parser reads the argument count as a number but doesn't check that
sufficient arguments are supplied. This command triggers the bug:
dmsetup create mpath --table "0 `blockdev --getsize /dev/mapper/cr0`
multipath 0 0 2 1 round-robin 1000 0 1 1 /dev/mapper/cr0
round-robin 0 1 1 /dev/mapper/cr1 1000"
kernel BUG at drivers/md/dm-mpath.c:530!
Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | drivers/md/dm-mpath.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 6a386ab4f7eb..d880299334e9 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -553,6 +553,12 @@ static int parse_path_selector(struct arg_set *as, struct priority_group *pg, return -EINVAL; } + if (ps_argc > as->argc) { + dm_put_path_selector(pst); + ti->error = "not enough arguments for path selector"; + return -EINVAL; + } + r = pst->create(&pg->ps, ps_argc, as->argv); if (r) { dm_put_path_selector(pst); |