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From 5aebf9b47bd21731d19e8f9c9dfcd336f9182c50 Mon Sep 17 00:00:00 2001 |
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From: Sasha Levin <sashal@kernel.org> |
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Date: Wed, 26 Oct 2022 10:00:54 +0800 |
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Subject: drm/amdkfd: Fix NULL pointer dereference in svm_migrate_to_ram() |
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From: Yang Li <yang.lee@linux.alibaba.com> |
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[ Upstream commit 5b994354af3cab770bf13386469c5725713679af ] |
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./drivers/gpu/drm/amd/amdkfd/kfd_migrate.c:985:58-62: ERROR: p is NULL but dereferenced. |
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Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2549 |
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Reported-by: Abaci Robot <abaci@linux.alibaba.com> |
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Signed-off-by: Yang Li <yang.lee@linux.alibaba.com> |
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Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> |
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Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> |
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Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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Cc: stable@vger.kernel.org |
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Signed-off-by: Sasha Levin <sashal@kernel.org> |
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--- |
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drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 4 +--- |
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1 file changed, 1 insertion(+), 3 deletions(-) |
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diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c |
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index 6555d775a532..5b5a79ccb716 100644 |
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--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c |
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+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c |
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@@ -971,12 +971,10 @@ static vm_fault_t svm_migrate_to_ram(struct vm_fault *vmf) |
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out_unlock_svms: |
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mutex_unlock(&p->svms.lock); |
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out_unref_process: |
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+ pr_debug("CPU fault svms 0x%p address 0x%lx done\n", &p->svms, addr); |
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kfd_unref_process(p); |
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out_mmput: |
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mmput(mm); |
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- |
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- pr_debug("CPU fault svms 0x%p address 0x%lx done\n", &p->svms, addr); |
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- |
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return r ? VM_FAULT_SIGBUS : 0; |
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} |
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-- |
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2.35.1 |
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