Jann Horn b692c405a1 sys: don't hold uts_sem while accessing userspace memory ... commit 42a0cc3478 upstream. Holding uts_sem as a writer while accessing userspace memory allows a namespace admin to stall all processes that attempt to take uts_sem. Instead, move data through stack buffers and don't access userspace memory while uts_sem is held. Cc: stable@vger.kernel.org Fixes: 1da177e4c3 ("Linux-2.6.12-rc2") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-09 19:56:00 +02:00
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boot	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
include	locking/xchg/alpha: Fix xchg() and cmpxchg() memory ordering bugs	2018-05-30 07:52:02 +02:00
kernel	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 19:56:00 +02:00
lib	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
math-emu	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mm	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
oprofile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.debug	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	alpha: makefile: don't enforce small data model for kernel builds	2013-04-07 12:59:30 -07:00
defconfig	alpha: defconfig: Cleanup from old Kconfig options	2017-09-04 12:04:33 -07:00