This is a note to let you know that I've just added the patch titled
drm/amdkfd: Fix memory leak in create_process failure
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdkfd-fix-memory-leak-in-create_process-failure.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 18921b205012568b45760753ad3146ddb9e2d4e2 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <felix.kuehling@xxxxxxx>
Date: Wed, 10 Apr 2024 15:52:10 -0400
Subject: drm/amdkfd: Fix memory leak in create_process failure
From: Felix Kuehling <felix.kuehling@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Tested-by: Harish Kasiviswanthan <Harish.Kasiviswanthan@xxxxxxx>
Reviewed-by: Mukul Joshi <mukul.joshi@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -819,9 +819,9 @@ 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. */
Patches currently in stable-queue which might be from felix.kuehling@xxxxxxx are
queue-6.8/drm-ttm-stop-pooling-cached-numa-pages-v2.patch
queue-6.8/drm-amdkfd-fix-memory-leak-in-create_process-failure.patch
