kernel/linux.git/drivers/net/usb/pegasus.c, branch v4.9.331

net: pegasus: fix uninit-value in get_interrupt_interval

2021-08-15T11:01:02+00:00

[ Upstream commit af35fc37354cda3c9c8cc4961b1d24bdc9d27903 ] Syzbot reported uninit value pegasus_probe(). The problem was in missing error handling. get_interrupt_interval() internally calls read_eprom_word() which can fail in some cases. For example: failed to receive usb control message. These cases should be handled to prevent uninit value bug, since read_eprom_word() will not initialize passed stack variable in case of internal failure. Fail log: BUG: KMSAN: uninit-value in get_interrupt_interval drivers/net/usb/pegasus.c:746 [inline] BUG: KMSAN: uninit-value in pegasus_probe+0x10e7/0x4080 drivers/net/usb/pegasus.c:1152 CPU: 1 PID: 825 Comm: kworker/1:1 Not tainted 5.12.0-rc6-syzkaller #0 ... Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 get_interrupt_interval drivers/net/usb/pegasus.c:746 [inline] pegasus_probe+0x10e7/0x4080 drivers/net/usb/pegasus.c:1152 .... Local variable ----data.i@pegasus_probe created at: get_interrupt_interval drivers/net/usb/pegasus.c:1151 [inline] pegasus_probe+0xe57/0x4080 drivers/net/usb/pegasus.c:1152 get_interrupt_interval drivers/net/usb/pegasus.c:1151 [inline] pegasus_probe+0xe57/0x4080 drivers/net/usb/pegasus.c:1152 Reported-and-tested-by: syzbot+02c9f70f3afae308464a@syzkaller.appspotmail.com Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Pavel Skripkin Link: https://lore.kernel.org/r/20210804143005.439-1-paskripkin@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

net: usb: pegasus: fix improper read if get_registers() fail

2019-08-25T08:51:45+00:00

commit 224c04973db1125fcebefffd86115f99f50f8277 upstream. get_registers() may fail with -ENOMEM and in this case we can read a garbage from the status variable tmp. Reported-by: syzbot+3499a83b2d062ae409d4@syzkaller.appspotmail.com Signed-off-by: Denis Kirjanov Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

pegasus: Use heap buffers for all register access

2017-02-18T14:11:42+00:00

[ Upstream commit 5593523f968bc86d42a035c6df47d5e0979b5ace ] Allocating USB buffers on the stack is not portable, and no longer works on x86_64 (with VMAP_STACK enabled as per default). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") References: https://bugs.debian.org/852556 Reported-by: Lisandro Damián Nicanor Pérez Meyer Tested-by: Lisandro Damián Nicanor Pérez Meyer Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

net: pegasus: Remove deprecated create_singlethread_workqueue

2016-09-01T23:42:25+00:00

The workqueue "pegasus_workqueue" queues a single work item per pegasus instance and hence it doesn't require execution ordering. Hence, alloc_workqueue has been used to replace the deprecated create_singlethread_workqueue instance. The WQ_MEM_RECLAIM flag has been set to ensure forward progress under memory pressure since it's a network driver. Since there are fixed number of work items, explicit concurrency limit is unnecessary here. Signed-off-by: Bhaktipriya Shridhar Acked-by: Tejun Heo Acked-by: Petko Manolov Signed-off-by: David S. Miller

net: pegasus: simplify logical constraint

2016-05-23T20:48:45+00:00

If !count is true, count < 4 is also true. Signed-off-by: Heinrich Schuchardt Signed-off-by: David S. Miller

treewide: replace dev->trans_start update with helper

2016-05-04T18:16:49+00:00

Replace all trans_start updates with netif_trans_update helper. change was done via spatch: struct net_device *d; @@ - d->trans_start = jiffies + netif_trans_update(d) Compile tested only. Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: linux1394-devel@lists.sourceforge.net Cc: linux-rdma@vger.kernel.org Cc: netdev@vger.kernel.org Cc: MPT-FusionLinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org Cc: linux-can@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: linux-bluetooth@vger.kernel.org Signed-off-by: Florian Westphal Acked-by: Felipe Balbi Acked-by: Mugunthan V N Acked-by: Antonio Quartulli Signed-off-by: David S. Miller

pegasus: fixes reported packet length

2016-04-28T21:05:25+00:00

The default Pegasus setup was to append the status and CRC at the end of each received packet. The status bits are used to update various stats, but CRC has been ignored. The new default is to not append CRC at the end of RX packets. Signed-off-by: Petko Manolov Signed-off-by: David S. Miller

pegasus: fixes URB buffer allocation size;

2016-04-28T21:05:24+00:00

usb_fill_bulk_urb() receives buffer length parameter 8 bytes larger than what's allocated by alloc_skb(); This seems to be a problem with older (pegasus usb-1.1) devices, which may silently return more data than the maximal packet length. Reported-by: Lincoln Ramsay Signed-off-by: Petko Manolov Signed-off-by: David S. Miller

net: get rid of SET_ETHTOOL_OPS

2014-05-13T21:43:20+00:00

net: get rid of SET_ETHTOOL_OPS Dave Miller mentioned he'd like to see SET_ETHTOOL_OPS gone. This does that. Mostly done via coccinelle script: @@ struct ethtool_ops *ops; struct net_device *dev; @@ - SET_ETHTOOL_OPS(dev, ops); + dev->ethtool_ops = ops; Compile tested only, but I'd seriously wonder if this broke anything. Suggested-by: Dave Miller Signed-off-by: Wilfried Klaebe Acked-by: Felipe Balbi Signed-off-by: David S. Miller

usbnet: pegasus: endian bug in write_mii_word()

2013-05-03T20:10:23+00:00

We're only passing the two high bytes of an integer. It works for little endian but not for big endian. Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller