b92f12c5ee
[ Upstream commit 09b90e2fe35faeace2488234e2a7728f2ea8ba26 ]
In nouveau_conn_reset(), if connector->state is true,
__drm_atomic_helper_connector_destroy_state() will be called,
but the memory pointed by asyc isn't freed. Memory leak happens
in the following function __drm_atomic_helper_connector_reset(),
where newly allocated asyc->state will be assigned to connector->state.
So using nouveau_conn_atomic_destroy_state() instead of
__drm_atomic_helper_connector_destroy_state to free the "old" asyc.
Here the is the log showing memory leak.
unreferenced object 0xffff8c5480483c80 (size 192):
comm "kworker/0:2", pid 188, jiffies 4294695279 (age 53.179s)
hex dump (first 32 bytes):
00 f0 ba 7b 54 8c ff ff 00 00 00 00 00 00 00 00 ...{T...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000005005c0d0>] kmem_cache_alloc_trace+0x195/0x2c0
[<00000000a122baed>] nouveau_conn_reset+0x25/0xc0 [nouveau]
[<000000004fd189a2>] nouveau_connector_create+0x3a7/0x610 [nouveau]
[<00000000c73343a8>] nv50_display_create+0x343/0x980 [nouveau]
[<000000002e2b03c3>] nouveau_display_create+0x51f/0x660 [nouveau]
[<00000000c924699b>] nouveau_drm_device_init+0x182/0x7f0 [nouveau]
[<00000000cc029436>] nouveau_drm_probe+0x20c/0x2c0 [nouveau]
[<000000007e961c3e>] local_pci_probe+0x47/0xa0
[<00000000da14d569>] work_for_cpu_fn+0x1a/0x30
[<0000000028da4805>] process_one_work+0x27c/0x660
[<000000001d415b04>] worker_thread+0x22b/0x3f0
[<0000000003b69f1f>] kthread+0x12f/0x150
[<00000000c94c29b7>] ret_from_fork+0x3a/0x50
Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.