usbip: vudc synchronize sysfs code paths

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commit bd8b820422 upstream.

Fuzzing uncovered race condition between sysfs code paths in usbip
drivers. Device connect/disconnect code paths initiated through
sysfs interface are prone to races if disconnect happens during
connect and vice versa.

Use sysfs_lock to protect sysfs paths in vudc.

Cc: stable@vger.kernel.org
Reported-and-tested-by: syzbot+a93fba6d384346a761e3@syzkaller.appspotmail.com
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/caabcf3fc87bdae970509b5ff32d05bb7ce2fb15.1616807117.git.skhan@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Shuah Khan 2021-03-29 19:36:50 -06:00 • committed by Greg Kroah-Hartman

parent 513765b186

commit 28dc9237fe

2 changed files with 6 additions and 0 deletions

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1

drivers/usb/usbip/vudc_dev.c

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5

drivers/usb/usbip/vudc_sysfs.c

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