Havard Skinnemoen 5dc2470c60 USB: cdc-acm: Fix disconnect() vs close() race ... There's a race between the USB disconnect handler and the TTY close handler which may cause the acm object to be freed while it's still being used. This may lead to things like http://article.gmane.org/gmane.linux.usb.general/54250 and https://lkml.org/lkml/2011/5/29/64 This is the simplest fix I could come up with. Holding on to open_mutex while closing the TTY device prevents acm_disconnect() from freeing the acm object between acm->port.count drops to 0 and the TTY side of the cleanups are finalized. Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com> Cc: Oliver Neukum <oliver@neukum.name> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2011-11-14 13:47:49 -08:00
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cdc-acm.c	USB: cdc-acm: Fix disconnect() vs close() race	2011-11-14 13:47:49 -08:00
cdc-acm.h
cdc-wdm.c
Kconfig
Makefile
usblp.c
usbtmc.c