Johannes Berg 833f5208b1 um: defer killing userspace on page table update failures ... commit a7d48886cacf8b426e0079bca9639d2657cf2d38 upstream. In some cases we can get to fix_range_common() with mmap_sem held, and in others we get there without it being held. For example, we get there with it held from sys_mprotect(), and without it held from fork_handler(). Avoid any issues in this and simply defer killing the task until it runs the next time. Do it on the mm so that another task that shares the same mm can't continue running afterwards. Cc: stable@vger.kernel.org Fixes: 468f65976a ("um: Fix hung task in fix_range_common()") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-03-04 11:38:42 +01:00
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configs	um: Cleanup CONFIG_IOSCHED_CFQ	2020-03-29 23:15:22 +02:00
drivers	um: virtio: free vu_dev only with the contained struct device	2021-02-10 09:29:12 +01:00
include	um: defer killing userspace on page table update failures	2021-03-04 11:38:42 +01:00
kernel	um: defer killing userspace on page table update failures	2021-03-04 11:38:42 +01:00
os-Linux	um: defer killing userspace on page table update failures	2021-03-04 11:38:42 +01:00
scripts	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Kconfig	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-10-22 09:59:21 -07:00
Kconfig.debug	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	kbuild: remove cc-option test of -fno-stack-protector	2020-07-07 11:13:10 +09:00
Makefile-os-Linux	x86, um: get rid of arch/um/os symlink	2008-10-22 22:55:22 -07:00
Makefile-skas