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| author | Shang XiaoJing <shangxiaojing@huawei.com> | 2022-11-01 15:07:15 +0800 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2022-11-10 18:49:01 -0500 |
| commit | ff963634f7b2e0dc011349abb3fb81a0d074f443 (patch) | |
| tree | 629f33405e658828cb7c34e6db127757019cb4d5 /drivers/gpu/drm/drm_drv.c | |
| parent | 876153ab068b2507a19aa3ef481f5b00a2cc780f (diff) | |
| download | linux-ff963634f7b2e0dc011349abb3fb81a0d074f443.tar.gz linux-ff963634f7b2e0dc011349abb3fb81a0d074f443.tar.bz2 linux-ff963634f7b2e0dc011349abb3fb81a0d074f443.zip | |
drm/drv: Fix potential memory leak in drm_dev_init()
drm_dev_init() will add drm_dev_init_release() as a callback. When
drmm_add_action() failed, the release function won't be added. As the
result, the ref cnt added by device_get() in drm_dev_init() won't be put
by drm_dev_init_release(), which leads to the memleak. Use
drmm_add_action_or_reset() instead of drmm_add_action() to prevent
memleak.
unreferenced object 0xffff88810bc0c800 (size 2048):
comm "modprobe", pid 8322, jiffies 4305809845 (age 15.292s)
hex dump (first 32 bytes):
e8 cc c0 0b 81 88 ff ff ff ff ff ff 00 00 00 00 ................
20 24 3c 0c 81 88 ff ff 18 c8 c0 0b 81 88 ff ff $<.............
backtrace:
[<000000007251f72d>] __kmalloc+0x4b/0x1c0
[<0000000045f21f26>] platform_device_alloc+0x2d/0xe0
[<000000004452a479>] platform_device_register_full+0x24/0x1c0
[<0000000089f4ea61>] 0xffffffffa0736051
[<00000000235b2441>] do_one_initcall+0x7a/0x380
[<0000000001a4a177>] do_init_module+0x5c/0x230
[<000000002bf8a8e2>] load_module+0x227d/0x2420
[<00000000637d6d0a>] __do_sys_finit_module+0xd5/0x140
[<00000000c99fc324>] do_syscall_64+0x3f/0x90
[<000000004d85aa77>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Fixes: 2cbf7fc6718b ("drm: Use drmm_ for drm_dev_init cleanup")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221101070716.9189-2-shangxiaojing@huawei.com
Diffstat (limited to 'drivers/gpu/drm/drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 8214a0b1ab7f..203bf8d6c34c 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -615,7 +615,7 @@ static int drm_dev_init(struct drm_device *dev, mutex_init(&dev->clientlist_mutex); mutex_init(&dev->master_mutex); - ret = drmm_add_action(dev, drm_dev_init_release, NULL); + ret = drmm_add_action_or_reset(dev, drm_dev_init_release, NULL); if (ret) return ret; |