queue-6.8/drm-amdkfd-fix-memory-leak-in-create_process-failure.patch

   1 From 18921b205012568b45760753ad3146ddb9e2d4e2 Mon Sep 17 00:00:00 2001
   2 From: Felix Kuehling <felix.kuehling@amd.com>
   3 Date: Wed, 10 Apr 2024 15:52:10 -0400
   4 Subject: drm/amdkfd: Fix memory leak in create_process failure
   5
   6 From: Felix Kuehling <felix.kuehling@amd.com>
   7
   8 commit 18921b205012568b45760753ad3146ddb9e2d4e2 upstream.
   9
  10 Fix memory leak due to a leaked mmget reference on an error handling
  11 code path that is triggered when attempting to create KFD processes
  12 while a GPU reset is in progress.
  13
  14 Fixes: 0ab2d7532b05 ("drm/amdkfd: prepare per-process debug enable and disable")
  15 CC: Xiaogang Chen <xiaogang.chen@amd.com>
  16 Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
  17 Tested-by: Harish Kasiviswanthan <Harish.Kasiviswanthan@amd.com>
  18 Reviewed-by: Mukul Joshi <mukul.joshi@amd.com>
  19 Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
  20 Cc: stable@vger.kernel.org
  21 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  22 ---
  23  drivers/gpu/drm/amd/amdkfd/kfd_process.c |    4 ++--
  24  1 file changed, 2 insertions(+), 2 deletions(-)
  25
  26 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
  27 +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
  28 @@ -819,9 +819,9 @@ struct kfd_process *kfd_create_process(s
  29         mutex_lock(&kfd_processes_mutex);
  30
  31         if (kfd_is_locked()) {
  32 -               mutex_unlock(&kfd_processes_mutex);
  33                 pr_debug("KFD is locked! Cannot create process");
  34 -               return ERR_PTR(-EINVAL);
  35 +               process = ERR_PTR(-EINVAL);
  36 +               goto out;
  37         }
  38
  39         /* A prior open of /dev/kfd could have already created the process. */