shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
Roland Dreier
2018-04-03 15:33:01 -07:00
committed by Greg Kroah-Hartman
parent 990251318b
commit fe8fd32fb2
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/infiniband/core/ucma.c
View File

@@ -1230,6 +1230,9 @@ 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));
ib_sa_unpack_path(path_data->path_rec, &sa_path);