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| author | Dongliang Mu <mudongliangabcd@gmail.com> | 2021-05-25 16:06:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 17:17:32 +0300 |
| commit | 180f1b0195de37043ae7442a269fe1aebf3ed61b (patch) | |
| tree | 03034335f558388732d3c7a248fe946de2f01ae8 | |
| parent | 0b4d122394e9ede5ca44d2600eacb5ddaef50a3d (diff) | |
| download | linux-180f1b0195de37043ae7442a269fe1aebf3ed61b.tar.xz | |
media: dvd_usb: memory leak in cinergyt2_fe_attach
[ Upstream commit 9ad1efee086e0e913914fa2b2173efb830bad68c ]
When the driver fails to talk with the hardware with dvb_usb_generic_rw,
it will return an error to dvb_usb_adapter_frontend_init. However, the
driver forgets to free the resource (e.g., struct cinergyt2_fe_state),
which leads to a memory leak.
Fix this by freeing struct cinergyt2_fe_state when dvb_usb_generic_rw
fails in cinergyt2_frontend_attach.
backtrace:
[<0000000056e17b1a>] kmalloc include/linux/slab.h:552 [inline]
[<0000000056e17b1a>] kzalloc include/linux/slab.h:682 [inline]
[<0000000056e17b1a>] cinergyt2_fe_attach+0x21/0x80 drivers/media/usb/dvb-usb/cinergyT2-fe.c:271
[<00000000ae0b1711>] cinergyt2_frontend_attach+0x21/0x70 drivers/media/usb/dvb-usb/cinergyT2-core.c:74
[<00000000d0254861>] dvb_usb_adapter_frontend_init+0x11b/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290
[<0000000002e08ac6>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:84 [inline]
[<0000000002e08ac6>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline]
[<0000000002e08ac6>] dvb_usb_device_init.cold+0x4d0/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287
Reported-by: syzbot+e1de8986786b3722050e@syzkaller.appspotmail.com
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/usb/dvb-usb/cinergyT2-core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/cinergyT2-core.c b/drivers/media/usb/dvb-usb/cinergyT2-core.c index 6131aa7914a9..fb59dda7547a 100644 --- a/drivers/media/usb/dvb-usb/cinergyT2-core.c +++ b/drivers/media/usb/dvb-usb/cinergyT2-core.c @@ -88,6 +88,8 @@ static int cinergyt2_frontend_attach(struct dvb_usb_adapter *adap) ret = dvb_usb_generic_rw(d, st->data, 1, st->data, 3, 0); if (ret < 0) { + if (adap->fe_adap[0].fe) + adap->fe_adap[0].fe->ops.release(adap->fe_adap[0].fe); deb_rc("cinergyt2_power_ctrl() Failed to retrieve sleep state info\n"); } mutex_unlock(&d->data_mutex); |