| Message ID | f0888d98500b93eeef0a528b2091c16cf0303679.1376847403.git.ydroneaud@opteya.com (mailing list archive) |
|---|---|
| State | Rejected |
| Headers | show |
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index dc0574f..5981604 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -1436,6 +1436,9 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; + if ((out_len - sizeof resp)/(sizeof(struct ib_uverbs_wc)) < cmd.ne) + return -ENOSPC; + cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); if (!cq) return -EINVAL;
Makes ib_uverbs_poll_cq() check the length of the output buffer: this will prevent the function from writing past userspace provided buffer. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Link: http://mid.gmane.org/cover.1376847403.git.ydroneaud@opteya.com --- drivers/infiniband/core/uverbs_cmd.c | 3 +++ 1 file changed, 3 insertions(+)