It is possible to spam the kernel log with a misbehaving user process that
is passing incorrect dm ioctls to /dev/mapper/control. Use a rate limit
on these error messages to reduce the noise.
Signed-off-by: Colin Ian King <colin.i.king@xxxxxxxxx>
---
drivers/md/dm-ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index f299ff393a6a..d42eac944eb5 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1912,7 +1912,7 @@ static int check_version(unsigned int cmd, struct dm_ioctl __user *user,
if ((kernel_params->version[0] != DM_VERSION_MAJOR) ||
(kernel_params->version[1] > DM_VERSION_MINOR)) {
- DMERR("ioctl interface mismatch: kernel(%u.%u.%u), user(%u.%u.%u), cmd(%d)",
+ DMERR_LIMIT("ioctl interface mismatch: kernel(%u.%u.%u), user(%u.%u.%u), cmd(%d)",
DM_VERSION_MAJOR, DM_VERSION_MINOR,
DM_VERSION_PATCHLEVEL,
kernel_params->version[0],
@@ -1961,7 +1961,7 @@ static int copy_params(struct dm_ioctl __user *user, struct dm_ioctl *param_kern
if (unlikely(param_kernel->data_size < minimum_data_size) ||
unlikely(param_kernel->data_size > DM_MAX_TARGETS * DM_MAX_TARGET_PARAMS)) {
- DMERR("Invalid data size in the ioctl structure: %u",
+ DMERR_LIMIT("Invalid data size in the ioctl structure: %u",
param_kernel->data_size);
return -EINVAL;
}
--
2.39.5
