Commit 0a0a6e80 authored by Dean Luick's avatar Dean Luick Committed by Leon Romanovsky
Browse files

IB/hfi1: Reject a zero-length user expected buffer 



A zero length user buffer makes no sense and the code
does not handle it correctly.  Instead, reject a
zero length as invalid.

Fixes: 97736f36 ("IB/hfi1: Validate page aligned for a given virtual addres")
Signed-off-by: default avatarDean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/167328547120.1472310.6362802432127399257.stgit@awfm-02.cornelisnetworks.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 0afec5e9

drivers/infiniband/hw/hfi1/user_exp_rcv.c

+2 −0
Original line number Diff line number Diff line
@@ -256,6 +256,8 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, 


	if (!PAGE_ALIGNED(tinfo->vaddr))

		return -EINVAL;

	if (tinfo->length == 0)

		return -EINVAL;



	tidbuf = kzalloc(sizeof(*tidbuf), GFP_KERNEL);

	if (!tidbuf)