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| author |   Roland Dreier <roland@purestorage.com> | 2018-04-03 15:33:01 -0700 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-04-03 21:06:14 -0600 |
| commit | 8435168d50e66fa5eae01852769d20a36f9e5e83 (patch) | |
| tree | a721c193594199bf9b311d99761df90a00543996 /drivers | |
| parent | IB/qedr: Remove GID add/del dummy routines (diff) | |
| download | linux-dev-8435168d50e66fa5eae01852769d20a36f9e5e83.tar.xz linux-dev-8435168d50e66fa5eae01852769d20a36f9e5e83.zip | |
RDMA/ucma: Don't allow setting RDMA_OPTION_IB_PATH without an RDMA device
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/core/ucma.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index 2abb70c26559..5e4f2cce7383 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -1231,6 +1231,9 @@ static int ucma_set_ib_path(struct ucma_context *ctx, if (!optlen) return -EINVAL; + if (!ctx->cm_id->device) + return -EINVAL; + memset(&sa_path, 0, sizeof(sa_path)); sa_path.rec_type = SA_PATH_REC_TYPE_IB; |