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

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[ Upstream commit 0a0a6e80472c98947d73c3d13bcd7d101895f55d ]

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

Fixes: 97736f36dbeb ("IB/hfi1: Validate page aligned for a given virtual addres")
Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/167328547120.1472310.6362802432127399257.stgit@awfm-02.cornelisnetworks.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dean Luick 2023-01-09 12:31:11 -05:00 committed by Greg Kroah-Hartman
parent 902063a9fe
commit d307c75f43
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/hw/hfi1/user_exp_rcv.c
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@ -325,6 +325,8 @@ 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)