> On 3 Apr 2020, at 20:57, Jason Gunthorpe <jgg@xxxxxxxxxxxx> wrote:
>
> On Fri, Apr 03, 2020 at 08:43:28PM +0200, Håkon Bugge wrote:
>> A syzkaller test hits a NULL pointer dereference in
>> rdma_resolve_route():
>
> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
>
> This commit in 5.7 probably fixes this:
I think it will not. The mutex in 7c11910783a1 ("RDMA/ucma: Put a lock around every call to the rdma_cm layer") will not prevent addr_handler() to run concurrently with rdma_resolve_route(), right?
And, I also suspect 7c11910783a1 to have major performance impact. But, that's a different story.
Thxs, Håkon
>
> commit 7c11910783a1ea17e88777552ef146cace607b3c
> Author: Jason Gunthorpe <jgg@xxxxxxxx>
> Date: Tue Feb 18 15:45:38 2020 -0400
>
> RDMA/ucma: Put a lock around every call to the rdma_cm layer
>
>
> Lets find out.
>
> Jason
