Max Filippov a3be911a5f xtensa: fix uaccess-related livelock in do_page_fault ... commit 7b9acbb6aad4f54623dcd4bd4b1a60fe0c727b09 upstream. If a uaccess (e.g. get_user()) triggers a fault and there's a fault signal pending, the handler will return to the uaccess without having performed a uaccess fault fixup, and so the CPU will immediately execute the uaccess instruction again, whereupon it will livelock bouncing between that instruction and the fault handler. https://lore.kernel.org/lkml/20210121123140.GD48431@C02TD0UTHF1T.local/ Cc: stable@vger.kernel.org Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-04-07 15:00:09 +02:00
..
boot	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
configs	xtensa: reorganize vectors placement	2020-02-04 21:57:02 -08:00
include	local64.h: make <asm/local64.h> mandatory	2021-01-12 20:18:16 +01:00
kernel	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
lib	xtensa: propagate the calling conventions change down into csum_partial_copy_generic()	2020-08-20 15:45:21 -04:00
mm	xtensa: fix uaccess-related livelock in do_page_fault	2021-04-07 15:00:09 +02:00
oprofile
platforms	xtensa/simdisk: remove the call to check_disk_change	2020-07-08 16:20:01 -06:00
variants
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	xtensa: make stack dump size configurable	2019-11-26 11:33:39 -08:00
Makefile	xtensa: add XIP kernel support	2019-11-26 11:33:38 -08:00