[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210224125212.482485-20-sashal@kernel.org>
Date: Wed, 24 Feb 2021 07:51:36 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Zqiang <qiang.zhang@...driver.com>,
syzbot+c9e365d7f450e8aa615d@...kaller.appspotmail.com,
Daniel Vetter <daniel.vetter@...ll.ch>,
Sasha Levin <sashal@...nel.org>, linux-fbdev@...r.kernel.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.10 20/56] udlfb: Fix memory leak in dlfb_usb_probe
From: Zqiang <qiang.zhang@...driver.com>
[ 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@...kaller.appspotmail.com
Signed-off-by: Zqiang <qiang.zhang@...driver.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215063022.16746-1-qiang.zhang@windriver.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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
Powered by blists - more mailing lists