linux-kernel - [PATCH v3 03/29] riscv/Kconfig: enable HAVE_EXIT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Wed,  3 Apr 2024 16:34:51 -0700
From: Deepak Gupta <debug@...osinc.com>
To: paul.walmsley@...ive.com,
	rick.p.edgecombe@...el.com,
	broonie@...nel.org,
	Szabolcs.Nagy@....com,
	kito.cheng@...ive.com,
	keescook@...omium.org,
	ajones@...tanamicro.com,
	conor.dooley@...rochip.com,
	cleger@...osinc.com,
	atishp@...shpatra.org,
	alex@...ti.fr,
	bjorn@...osinc.com,
	alexghiti@...osinc.com,
	samuel.holland@...ive.com,
	conor@...nel.org
Cc: linux-doc@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-mm@...ck.org,
	linux-arch@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	corbet@....net,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	oleg@...hat.com,
	akpm@...ux-foundation.org,
	arnd@...db.de,
	ebiederm@...ssion.com,
	Liam.Howlett@...cle.com,
	vbabka@...e.cz,
	lstoakes@...il.com,
	shuah@...nel.org,
	brauner@...nel.org,
	debug@...osinc.com,
	andy.chiu@...ive.com,
	jerry.shih@...ive.com,
	hankuan.chen@...ive.com,
	greentime.hu@...ive.com,
	evan@...osinc.com,
	xiao.w.wang@...el.com,
	charlie@...osinc.com,
	apatel@...tanamicro.com,
	mchitale@...tanamicro.com,
	dbarboza@...tanamicro.com,
	sameo@...osinc.com,
	shikemeng@...weicloud.com,
	willy@...radead.org,
	vincent.chen@...ive.com,
	guoren@...nel.org,
	samitolvanen@...gle.com,
	songshuaishuai@...ylab.org,
	gerg@...nel.org,
	heiko@...ech.de,
	bhe@...hat.com,
	jeeheng.sia@...rfivetech.com,
	cyy@...self.name,
	maskray@...gle.com,
	ancientmodern4@...il.com,
	mathis.salmen@...sal.de,
	cuiyunhui@...edance.com,
	bgray@...ux.ibm.com,
	mpe@...erman.id.au,
	baruch@...s.co.il,
	alx@...nel.org,
	david@...hat.com,
	catalin.marinas@....com,
	revest@...omium.org,
	josh@...htriplett.org,
	shr@...kernel.io,
	deller@....de,
	omosnace@...hat.com,
	ojeda@...nel.org,
	jhubbard@...dia.com
Subject: [PATCH v3 03/29] riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv

riscv will need an implementation for exit_thread to clean up shadow stack
when thread exits. If current thread had shadow stack enabled, shadow
stack is allocated by default for any new thread.

Signed-off-by: Deepak Gupta <debug@...osinc.com>
---
 arch/riscv/Kconfig          | 1 +
 arch/riscv/kernel/process.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e3142ce531a0..7e0b2bcc388f 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -149,6 +149,7 @@ config RISCV
 	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
+	select HAVE_EXIT_THREAD
 	select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
 	select IRQ_DOMAIN
 	select IRQ_FORCED_THREADING
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index d3109557f951..ce577cdc2af3 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -200,6 +200,11 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 	return 0;
 }
 
+void exit_thread(struct task_struct *tsk)
+{
+
+}
+
 int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 {
 	unsigned long clone_flags = args->flags;
-- 
2.43.2