WARNINGs mean kernel bugs. The one in ucma_write() points to user programming error or a malicious attempt. This is not a kernel bug, remove it. BUG/WARNs that are not kernel bugs hinder automated testing effots. Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Doug Ledford <dledford@xxxxxxxxxx> Cc: Sean Hefty <sean.hefty@xxxxxxxxx> Cc: Hal Rosenstock <hal.rosenstock@xxxxxxxxx> Cc: Leon Romanovsky <leon@xxxxxxxxxx> Cc: linux-rdma@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: syzkaller@xxxxxxxxxxxxxxxx --- Changes since v1: - added printk_once --- drivers/infiniband/core/ucma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index 9520154..405d0ce 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -1584,8 +1584,11 @@ static ssize_t ucma_write(struct file *filp, const char __user *buf, struct rdma_ucm_cmd_hdr hdr; ssize_t ret; - if (WARN_ON_ONCE(!ib_safe_file_access(filp))) + if (!ib_safe_file_access(filp)) { + printk_once("ucma_write: process %d (%s) tried to do something hinky\n", + task_tgid_vnr(current), current->comm); return -EACCES; + } if (len < sizeof(hdr)) return -EINVAL; -- 2.8.0.rc3.226.g39d4020 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html