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From: Philip Yang <Philip.Yang@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: Philip Yang <Philip.Yang@amd.com>, Felix.Kuehling@amd.com
Subject: [PATCH] drm/amdkfd: fix double free mem structure
Date: Fri, 26 Nov 2021 18:58:37 -0500	[thread overview]
Message-ID: <20211126235837.11229-1-Philip.Yang@amd.com> (raw)

drm_gem_object_put calls release_notify callback to free the mem
structure and unreserve_mem_limit, move it down after the last access
of mem and make it conditional call.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index c5362c23e687..e592a2067133 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1582,14 +1582,16 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
 err_pin_bo:
 	drm_vma_node_revoke(&gobj->vma_node, drm_priv);
 err_node_allow:
-	drm_gem_object_put(gobj);
 	/* Don't unreserve system mem limit twice */
 	goto err_reserve_limit;
 err_bo_create:
 	unreserve_mem_limit(adev, size, flags);
 err_reserve_limit:
 	mutex_destroy(&(*mem)->lock);
-	kfree(*mem);
+	if (gobj)
+		drm_gem_object_put(gobj);
+	else
+		kfree(*mem);
 err:
 	if (sg) {
 		sg_free_table(sg);
-- 
2.17.1


             reply	other threads:[~2021-11-26 23:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-26 23:58 Philip Yang [this message]
2021-11-29 17:58 ` [PATCH] drm/amdkfd: fix double free mem structure Felix Kuehling
2021-11-29 19:14 ` [PATCH v2] " Philip Yang
2021-11-29 19:24   ` Felix Kuehling

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