On Tue, Dec 15, 2020 at 02:30:22PM +0800, qiang.zhang@xxxxxxxxxxxxx wrote: > From: Zqiang <qiang.zhang@xxxxxxxxxxxxx> > > 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> Queued up in drm-misc-next, thanks for your patch. -Daniel > --- > 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 f9b3c1cb9530..b9cdd02c1000 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); > > -- > 2.17.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
