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linux/drivers/usb/usbip
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Shuah Khan 2fc485b000 usbip: usbip_host: fix stub_dev lock context imbalance regression 
commit 3ea3091f1b upstream.

Fix the following sparse context imbalance regression introduced in
a patch that fixed sleeping function called from invalid context bug.

kbuild test robot reported on:

tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git  usb-linus

Regressions in current branch:

drivers/usb/usbip/stub_dev.c:399:9: sparse: sparse: context imbalance in 'stub_probe' - different lock contexts for basic block
drivers/usb/usbip/stub_dev.c:418:13: sparse: sparse: context imbalance in 'stub_disconnect' - different lock contexts for basic block
drivers/usb/usbip/stub_dev.c:464:1-10: second lock on line 476

Error ids grouped by kconfigs:

recent_errors
├── i386-allmodconfig
│   └── drivers-usb-usbip-stub_dev.c:second-lock-on-line
├── x86_64-allmodconfig
│   ├── drivers-usb-usbip-stub_dev.c:sparse:sparse:context-imbalance-in-stub_disconnect-different-lock-contexts-for-basic-block
│   └── drivers-usb-usbip-stub_dev.c:sparse:sparse:context-imbalance-in-stub_probe-different-lock-contexts-for-basic-block
└── x86_64-allyesconfig
    └── drivers-usb-usbip-stub_dev.c:second-lock-on-line

This is a real problem in an error leg where spin_lock() is called on an
already held lock.

Fix the imbalance in stub_probe() and stub_disconnect().

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Fixes: 0c9e8b3cad ("usbip: usbip_host: fix BUG: sleeping function called from invalid context")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-09 09:17:11 +02:00
..
Kconfig
Makefile
README
stub_dev.c usbip: usbip_host: fix stub_dev lock context imbalance regression 2019-06-09 09:17:11 +02:00
stub_main.c usbip: usbip_host: fix bad unlock balance during stub_probe() 2018-05-16 18:52:13 +02:00
stub_rx.c usb: usbip: fix isoc packet num validation in get_pipe 2019-05-08 07:21:43 +02:00
stub_tx.c
stub.h usbip: usbip_host: fix NULL-ptr deref and use-after-free errors 2018-05-15 09:52:02 +02:00
usbip_common.c
usbip_common.h usb: usbip: fix isoc packet num validation in get_pipe 2019-05-08 07:21:43 +02:00
usbip_event.c usbip: usbip_event: fix to not print kernel pointer address 2018-04-22 14:45:12 +02:00
vhci_hcd.c usb: usbip: Fix BUG: KASAN: slab-out-of-bounds in vhci_hub_control() 2018-10-09 16:13:42 +02:00
vhci_rx.c
vhci_sysfs.c usbip: vhci_sysfs: fix potential Spectre v1 2018-05-24 18:14:28 +02:00
vhci_tx.c
vhci.h
vudc_dev.c usb: usbip: remove redundant pointer ep 2018-07-13 15:41:55 +02:00
vudc_main.c usbip:vudc: BUG kmalloc-2048 (Not tainted): Poison overwritten 2018-11-13 11:08:41 -08:00
vudc_rx.c
vudc_sysfs.c usbip: vudc: fix null pointer dereference on udc->lock 2018-03-09 10:01:07 -08:00
vudc_transfer.c
vudc_tx.c
vudc.h

README 

TODO:
	- more discussion about the protocol
	- testing
	- review of the userspace interface
	- document the protocol

Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>