diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2024-01-09 15:57:56 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2024-01-30 14:05:02 -0500 |
| commit | bd504bcfec41a503b32054da5472904b404341a4 (patch) | |
| tree | cb99fb5518b4b0a663750dd6559073299a2c8070 /drivers/md/dm-table.c | |
| parent | 41bccc98fb7931d63d03f326a746ac4d429c1dd3 (diff) | |
dm: limit the number of targets and parameter size area
The kvmalloc function fails with a warning if the size is larger than
INT_MAX. The warning was triggered by a syscall testing robot.
In order to avoid the warning, this commit limits the number of targets to
1048576 and the size of the parameter area to 1073741824.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 260b5b8f2b0d..41f1d731ae5a 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -129,7 +129,12 @@ static int alloc_targets(struct dm_table *t, unsigned int num) int dm_table_create(struct dm_table **result, blk_mode_t mode, unsigned int num_targets, struct mapped_device *md) { - struct dm_table *t = kzalloc(sizeof(*t), GFP_KERNEL); + struct dm_table *t; + + if (num_targets > DM_MAX_TARGETS) + return -EOVERFLOW; + + t = kzalloc(sizeof(*t), GFP_KERNEL); if (!t) return -ENOMEM; @@ -144,7 +149,7 @@ int dm_table_create(struct dm_table **result, blk_mode_t mode, if (!num_targets) { kfree(t); - return -ENOMEM; + return -EOVERFLOW; } if (alloc_targets(t, num_targets)) { |