linux-kernel - [PATCH 6/6] uprobes/x86: Add SLS mitigation to the trampolines

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20250821123657.277506098@infradead.org>
Date: Thu, 21 Aug 2025 14:28:28 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: jolsa@...nel.org,
 oleg@...hat.com,
 andrii@...nel.org,
 mhiramat@...nel.org
Cc: linux-kernel@...r.kernel.org,
 peterz@...radead.org,
 alx@...nel.org,
 eyal.birger@...il.com,
 kees@...nel.org,
 bpf@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org,
 x86@...nel.org,
 songliubraving@...com,
 yhs@...com,
 john.fastabend@...il.com,
 haoluo@...gle.com,
 rostedt@...dmis.org,
 alan.maguire@...cle.com,
 David.Laight@...LAB.COM,
 thomas@...ch.de,
 mingo@...nel.org,
 rick.p.edgecombe@...el.com
Subject: [PATCH 6/6] uprobes/x86: Add SLS mitigation to the trampolines

It is trivial; no reason not to.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/x86/kernel/uprobes.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c
@@ -336,6 +336,7 @@ asm (
 	 * call ret.
 	 */
 	"ret\n"
+	"int3\n"
 	".global uretprobe_trampoline_end\n"
 	"uretprobe_trampoline_end:\n"
 	".popsection\n"
@@ -891,6 +892,7 @@ asm (
 	"pop %r11\n"
 	"pop %rcx\n"
 	"ret\n"
+	"int3\n"
 	".balign " __stringify(PAGE_SIZE) "\n"
 	".popsection\n"
 );