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IB/core: Fix qp_sec use after free access 

When security_ib_alloc_security fails, qp->qp_sec memory is freed.
However ib_destroy_qp still tries to access this memory which result
in kernel crash. So its initialized to NULL to avoid such access.

Fixes: d291f1a652 ("IB/core: Enforce PKey security on QPs")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Parav Pandit 2017-09-24 21:46:30 +03:00 committed by Doug Ledford
parent 78b1beb099
commit 73827a605b
1 changed files with 3 additions and 1 deletions
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4
drivers/infiniband/core/security.c
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@ -432,8 +432,10 @@ int ib_create_qp_security(struct ib_qp *qp, struct ib_device *dev)
atomic_set(&qp->qp_sec->error_list_count, 0); atomic_set(&qp->qp_sec->error_list_count, 0);
init_completion(&qp->qp_sec->error_complete); init_completion(&qp->qp_sec->error_complete);
ret = security_ib_alloc_security(&qp->qp_sec->security); ret = security_ib_alloc_security(&qp->qp_sec->security);
if (ret) if (ret) {
kfree(qp->qp_sec); kfree(qp->qp_sec);
qp->qp_sec = NULL;
}
return ret; return ret;
} }