| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.4 053/350] drm/amdkfd: fix a potential NULL pointer dereference (v2) | Date | Tue, 10 Dec 2019 16:02:38 -0500 |
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From: Allen Pais <allen.pais@oracle.com>
[ Upstream commit 81de29d842ccb776c0f77aa3e2b11b07fff0c0e2 ]
alloc_workqueue is not checked for errors and as a result, a potential NULL dereference could occur.
v2 (Felix Kuehling): * Fix compile error (kfifo_free instead of fifo_free) * Return proper error code
Signed-off-by: Allen Pais <allen.pais@oracle.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c index c56ac47cd3189..bc47f6a444564 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c @@ -62,6 +62,11 @@ int kfd_interrupt_init(struct kfd_dev *kfd) } kfd->ih_wq = alloc_workqueue("KFD IH", WQ_HIGHPRI, 1); + if (unlikely(!kfd->ih_wq)) { + kfifo_free(&kfd->ih_fifo); + dev_err(kfd_chardev(), "Failed to allocate KFD IH workqueue\n"); + return -ENOMEM; + } spin_lock_init(&kfd->interrupt_lock); INIT_WORK(&kfd->interrupt_work, interrupt_wq); -- 2.20.1
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