From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, syzbot <syzkaller@googlegroups.com>,
Willem de Bruijn <willemb@google.com>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Subject: [PATCH 4.14 17/29] media: gp8psk: initialize stats at power control logic
Date: Thu, 7 Jan 2021 15:31:32 +0100 [thread overview]
Message-ID: <20210107143055.339442798@linuxfoundation.org> (raw)
In-Reply-To: <20210107143052.973437064@linuxfoundation.org>
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
commit d0ac1a26ed5943127cb0156148735f5f52a07075 upstream.
As reported on:
https://lore.kernel.org/linux-media/20190627222020.45909-1-willemdebruijn.kernel@gmail.com/
if gp8psk_usb_in_op() returns an error, the status var is not
initialized. Yet, this var is used later on, in order to
identify:
- if the device was already started;
- if firmware has loaded;
- if the LNBf was powered on.
Using status = 0 seems to ensure that everything will be
properly powered up.
So, instead of the proposed solution, let's just set
status = 0.
Reported-by: syzbot <syzkaller@googlegroups.com>
Reported-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/media/usb/dvb-usb/gp8psk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/usb/dvb-usb/gp8psk.c
+++ b/drivers/media/usb/dvb-usb/gp8psk.c
@@ -185,7 +185,7 @@ out_rel_fw:
static int gp8psk_power_ctrl(struct dvb_usb_device *d, int onoff)
{
- u8 status, buf;
+ u8 status = 0, buf;
int gp_product_id = le16_to_cpu(d->udev->descriptor.idProduct);
if (onoff) {
next prev parent reply other threads:[~2021-01-07 14:38 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 14:31 [PATCH 4.14 00/29] 4.14.214-rc1 review Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 01/29] x86/entry/64: Add instruction suffix Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 02/29] md/raid10: initialize r10_bio->read_slot before use Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 03/29] ALSA: hda/ca0132 - Fix work handling in delayed HP detection Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 04/29] ALSA: usb-audio: simplify set_sync_ep_implicit_fb_quirk Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 05/29] ALSA: usb-audio: fix sync-ep altsetting sanity check Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 06/29] mm: memcontrol: eliminate raw access to stat and event counters Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 07/29] mm: memcontrol: implement lruvec stat functions on top of each other Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 08/29] mm: memcontrol: fix excessive complexity in memory.stat reporting Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 09/29] vfio/pci: Move dummy_resources_list init in vfio_pci_probe() Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 10/29] s390/dasd: fix hanging device offline processing Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 11/29] USB: serial: digi_acceleport: fix write-wakeup deadlocks Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 12/29] powerpc/bitops: Fix possible undefined behaviour with fls() and fls64() Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 13/29] uapi: move constants from <linux/kernel.h> to <linux/const.h> Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 14/29] of: fix linker-section match-table corruption Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 15/29] reiserfs: add check for an invalid ih_entry_count Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 16/29] misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells() Greg Kroah-Hartman
2021-01-07 14:31 ` Greg Kroah-Hartman [this message]
2021-01-07 14:31 ` [PATCH 4.14 18/29] ALSA: seq: Use bool for snd_seq_queue internal flags Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 19/29] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 20/29] module: set MODULE_STATE_GOING state when a module fails to load Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 21/29] quota: Dont overflow quota file offsets Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 22/29] powerpc: sysdev: add missing iounmap() on error in mpic_msgr_probe() Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 23/29] module: delay kobject uevent until after module init call Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 24/29] ALSA: pcm: Clear the full allocated memory at hw_params Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 25/29] dm verity: skip verity work if I/O error when system is shutting down Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 26/29] kdev_t: always inline major/minor helper functions Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 27/29] iio:imu:bmi160: Fix alignment and data leak issues Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 28/29] iio:magnetometer:mag3110: " Greg Kroah-Hartman
2021-01-07 14:31 ` [PATCH 4.14 29/29] mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start Greg Kroah-Hartman
2021-01-08 7:35 ` [PATCH 4.14 00/29] 4.14.214-rc1 review Naresh Kamboju
2021-01-08 17:38 ` Guenter Roeck
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