Commit f7a43c65 authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Greg Kroah-Hartman

RDMA/mthca: Clear QP objects during their allocation

[ Upstream commit 9d9f59b4 ]

As part of audit process to update drivers to use rdma_restrack_add()
ensure that QP objects is cleared before access. Such change fixes the
crash observed with uninitialized non zero sgid attr accessed by
ib_destroy_qp().

CPU: 3 PID: 74 Comm: kworker/u16:1 Not tainted 4.19.10-300.fc29.x86_64
Workqueue: ipoib_wq ipoib_cm_tx_reap [ib_ipoib]
RIP: 0010:rdma_put_gid_attr+0x9/0x30 [ib_core]
RSP: 0018:ffffb7ad819dbde8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff8d1bdf5a2e00 RCX: 0000000000002699
RDX: 206c656e72656af8 RSI: ffff8d1bf7ae6160 RDI: 206c656e72656b20
RBP: 0000000000000000 R08: 0000000000026160 R09: ffffffffc06b45bf
R10: ffffe849887da000 R11: 0000000000000002 R12: ffff8d1be30cb400
R13: ffff8d1bdf681800 R14: ffff8d1be2272400 R15: ffff8d1be30ca000
FS:  0000000000000000(0000) GS:ffff8d1bf7ac0000(0000)
knlGS:0000000000000000
Trace:
 ib_destroy_qp+0xc9/0x240 [ib_core]
 ipoib_cm_tx_reap+0x1f9/0x4e0 [ib_ipoib]
 process_one_work+0x1a1/0x3a0
 worker_thread+0x30/0x380
 ? pwq_unbound_release_workfn+0xd0/0xd0
 kthread+0x112/0x130
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x22/0x40
Reported-by: Alexander Murashkin's avatarAlexander Murashkin <AlexanderMurashkin@msn.com>
Tested-by: Alexander Murashkin's avatarAlexander Murashkin <AlexanderMurashkin@msn.com>
Fixes: 1a1f460f ("RDMA: Hold the sgid_attr inside the struct ib_ah/qp")
Signed-off-by: 's avatarParav Pandit <parav@mellanox.com>
Signed-off-by: 's avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: 's avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
parent 6b08e8a0
......@@ -533,7 +533,7 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
{
struct mthca_ucontext *context;
qp = kmalloc(sizeof *qp, GFP_KERNEL);
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
......@@ -599,7 +599,7 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
if (pd->uobject)
return ERR_PTR(-EINVAL);
qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
qp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
......
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