On 4/16/21 2:53 PM, Tom Seewald wrote:
From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> commit 363eaa3a450abb4e63bd6e3ad79d1f7a0f717814 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 synchronize event handler with sysfs paths in usbip drivers. Cc: stable@xxxxxxxxxxxxxxx # 4.9.x Reported-and-tested-by: syzbot+a93fba6d384346a761e3@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/c5c8723d3f29dfe3d759cfaafa7dd16b0dfe2918.1616807117.git.skhan@xxxxxxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Tom Seewald <tseewald@xxxxxxxxx> --- drivers/usb/usbip/usbip_event.c | 2 ++ 1 file changed, 2 insertions(+)
Thank you for the backport. Reviewed-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Greg, please pick this up for 4.9.x thanks, -- Shuah
