Previously the error was "unable to find target", which is not helpful.
Signed-off-by: Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-ioctl.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index a1d5fe64e1d0d9d3dcb06924249b89fe661944ab..9f505abba3dc22bffc6acb335c0bf29fec288fd5 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1423,9 +1423,6 @@ static int next_target(struct dm_target_spec *last, uint32_t next, void *end,
*spec = (struct dm_target_spec *) ((unsigned char *) last + next);
*target_params = (char *) (*spec + 1);
- if (*spec < (last + 1))
- return -EINVAL;
-
return invalid_str(*target_params, end);
}
@@ -1451,6 +1448,11 @@ static int populate_table(struct dm_table *table,
}
for (i = 0; i < param->target_count; i++) {
+ if (next < sizeof(*spec)) {
+ DMERR("%s: next target spec (offset %u) overlaps 'struct dm_target_spec'",
+ __func__, next);
+ return -EINVAL;
+ }
r = next_target(spec, next, end, &spec, &target_params);
if (r) {
--
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab
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