RDMA/ucma: Don't allow setting RDMA_OPTION_IB_PATH without an RDMA device

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commit 8435168d50 upstream.

Check to make sure that ctx->cm_id->device is set before we use it.
Otherwise userspace can trigger a NULL dereference by doing
RDMA_USER_CM_CMD_SET_OPTION on an ID that is not bound to a device.

Cc: <stable@vger.kernel.org>
Reported-by: <syzbot+a67bc93e14682d92fc2f@syzkaller.appspotmail.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Roland Dreier 2018-04-03 15:33:01 -07:00 • committed by Greg Kroah-Hartman

parent 79fbd052ea

commit b140d94688

1 changed files with 3 additions and 0 deletions

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drivers/infiniband/core/ucma.c

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