CVE-2022-50626: In the Linux kernel, the following vulnerability has been resolved:  media: dvb-usb: fix memory leak in dvb_usb_adapter_init()  Syzbot reports a memory leak in "dvb_usb_adapter_init()". The leak is due to not accounting for and freeing current iteration's adapter->priv in case of an error. Currently if an error occurs, it will exit before incrementing "num_adapters_initalized", which is used as a reference counter to free all adap->priv in "dvb_usb_adapter_exit()". There are multiple error paths that can exit from before incrementing the counter. Including the error handling paths for "dvb_usb_adapter_stream_init()", "dvb_usb_adapter_dvb_init()" and "dvb_usb_adapter_frontend_init()" within "dvb_usb_adapter_init()".  This means that in case of an error in any of these functions the current iteration is not accounted for and the current iteration's adap->priv is not freed.  Fix this by freeing the current iteration's adap->priv in the "stream_init_err:" label in the error path. The rest of the (accounted for) adap->priv objects are freed in dvb_usb_adapter_exit() as expected using the num_adapters_initalized variable.  Syzbot report:  BUG: memory leak unreferenced object 0xffff8881172f1a00 (size 512):   comm "kworker/0:2", pid 139, jiffies 4294994873 (age 10.960s)   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................ backtrace:     [<ffffffff844af012>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline]     [<ffffffff844af012>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]     [<ffffffff844af012>] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308     [<ffffffff830db21d>] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883     [<ffffffff82d3fdc7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396     [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]     [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621     [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]     [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752     [<ffffffff8274af6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782     [<ffffffff8274b786>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899     [<ffffffff82747c87>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427     [<ffffffff8274b352>] __device_attach+0x122/0x260 drivers/base/dd.c:970     [<ffffffff827498f6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487     [<ffffffff82745cdb>] device_add+0x5fb/0xdf0 drivers/base/core.c:3405     [<ffffffff82d3d202>] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170     [<ffffffff82d4dbfc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238     [<ffffffff82d3f49c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293     [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]     [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621     [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]     [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752