From: Zqiang <qiang.zhang@xxxxxxxxxxxxx>
[ Upstream commit 5c0e4110f751934e748a66887c61f8e73805f0f9 ]
The dlfb_alloc_urb_list function is called in dlfb_usb_probe function,
after that if an error occurs, the dlfb_free_urb_list function need to
be called.
BUG: memory leak
unreferenced object 0xffff88810adde100 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294947788 (age 19.520s)
hex dump (first 32 bytes):
10 30 c3 0d 81 88 ff ff c0 fa 63 12 81 88 ff ff .0........c.....
00 30 c3 0d 81 88 ff ff 80 d1 3a 08 81 88 ff ff .0........:.....
backtrace:
[<0000000019512953>] kmalloc include/linux/slab.h:552 [inline]
[<0000000019512953>] kzalloc include/linux/slab.h:664 [inline]
[<0000000019512953>] dlfb_alloc_urb_list drivers/video/fbdev/udlfb.c:1892 [inline]
[<0000000019512953>] dlfb_usb_probe.cold+0x289/0x988 drivers/video/fbdev/udlfb.c:1704
[<0000000072160152>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
[<00000000a8d6726f>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<00000000c3ce4b0e>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<00000000e942e01c>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<00000000de0a5a5c>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000463fbcb4>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<00000000b881a711>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<00000000364bbda5>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<00000000eecca418>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
[<00000000edfeca2d>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<000000001830872b>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<00000000a8d6726f>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<00000000c3ce4b0e>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<00000000e942e01c>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<00000000de0a5a5c>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
Reported-by: syzbot+c9e365d7f450e8aa615d@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Zqiang <qiang.zhang@xxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215063022.16746-1-qiang.zhang@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/video/fbdev/udlfb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index f9b3c1cb9530f..b9cdd02c10009 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -1017,6 +1017,7 @@ static void dlfb_ops_destroy(struct fb_info *info)
}
vfree(dlfb->backing_buffer);
kfree(dlfb->edid);
+ dlfb_free_urb_list(dlfb);
usb_put_dev(dlfb->udev);
kfree(dlfb);
--
2.27.0
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