Eric W. Biederman 8f072ec8b4 signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL) ... [ Upstream commit ce0ee4e6ac ] Today the sh code allocates memory the first time a process uses the fpu. If that memory allocation fails, kill the affected task with force_sig(SIGKILL) rather than do_group_exit(SIGKILL). Calling do_group_exit from an exception handler can potentially lead to dead locks as do_group_exit is not designed to be called from interrupt context. Instead use force_sig(SIGKILL) to kill the userspace process. Sending signals in general and force_sig in particular has been tested from interrupt context so there should be no problems. Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: linux-sh@vger.kernel.org Fixes: 0ea820cf9b ("sh: Move over to dynamically allocated FPU context.") Link: https://lkml.kernel.org/r/20211020174406.17889-6-ebiederm@xmission.com Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-11-18 19:17:03 +01:00
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boards	SH: Bulk conversion to generic_handle_domain_irq()	2021-08-12 11:39:40 +01:00
boot	sh: Add missing FORCE prerequisites in Makefile	2021-09-19 10:13:42 +09:00
cchips	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
configs	drivers/char: remove /dev/kmem for good	2021-05-07 00:26:34 -07:00
drivers	sh: dma: fix kconfig dependency for G2_DMA	2021-01-06 19:55:22 -05:00
include	sh: pgtable-3level: fix cast to pointer from integer of different size	2021-09-24 16:13:35 -07:00
kernel	signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL)	2021-11-18 19:17:03 +01:00
lib	sh: propage the calling conventions change down to csum_partial_copy_generic()	2020-08-20 15:45:18 -04:00
math-emu	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2019-07-08 21:48:15 -07:00
mm	mm/memory_hotplug: remove nid parameter from arch_remove_memory()	2021-09-08 11:50:23 -07:00
tools	sh: Remove SH5-based Cayman platform	2020-08-14 22:05:06 -04:00
Kbuild	sh: move core-y in arch/sh/Makefile to arch/sh/Kbuild	2021-05-26 23:11:47 +09:00
Kconfig	Tracing updates for 5.15:	2021-09-05 11:50:41 -07:00
Kconfig.cpu	docs: sh: convert register-banks.txt to ReST	2020-06-19 14:10:13 -06:00
Kconfig.debug	tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig	2021-08-16 11:37:21 -04:00
Makefile	sh: move core-y in arch/sh/Makefile to arch/sh/Kbuild	2021-05-26 23:11:47 +09:00