6.6-stable review patch. If anyone has any objections, please let me know.
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From: Felix Kuehling felix.kuehling@amd.com
commit 18921b205012568b45760753ad3146ddb9e2d4e2 upstream.
Fix memory leak due to a leaked mmget reference on an error handling code path that is triggered when attempting to create KFD processes while a GPU reset is in progress.
Fixes: 0ab2d7532b05 ("drm/amdkfd: prepare per-process debug enable and disable") CC: Xiaogang Chen xiaogang.chen@amd.com Signed-off-by: Felix Kuehling felix.kuehling@amd.com Tested-by: Harish Kasiviswanthan Harish.Kasiviswanthan@amd.com Reviewed-by: Mukul Joshi mukul.joshi@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -818,9 +818,9 @@ struct kfd_process *kfd_create_process(s mutex_lock(&kfd_processes_mutex);
if (kfd_is_locked()) { - mutex_unlock(&kfd_processes_mutex); pr_debug("KFD is locked! Cannot create process"); - return ERR_PTR(-EINVAL); + process = ERR_PTR(-EINVAL); + goto out; }
/* A prior open of /dev/kfd could have already created the process. */