From: Andy Lutomirski <luto@kernel.org>
To: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Cc: Sasha Levin <sashal@kernel.org>, Andy Lutomirski <luto@kernel.org>
Subject: [PATCH 1/3] selftests/x86/fsgsbase: Fix a comment in the ptrace_write_gsbase test
Date: Wed, 24 Jun 2020 15:50:48 -0700 [thread overview]
Message-ID: <901034a91a40169ec84f1f699ea86704dff762e4.1593038991.git.luto@kernel.org> (raw)
In-Reply-To: <cover.1593038991.git.luto@kernel.org>
A comment was unclear. Fix it.
Fixes: 5e7ec8578fa3 ("selftests/x86/fsgsbase: Test ptracer-induced GS base write with FSGSBASE")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
tools/testing/selftests/x86/fsgsbase.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
index 9a4349813a30..f47495d2f070 100644
--- a/tools/testing/selftests/x86/fsgsbase.c
+++ b/tools/testing/selftests/x86/fsgsbase.c
@@ -498,7 +498,8 @@ static void test_ptrace_write_gsbase(void)
* base would zero the selector. On newer kernels,
* this behavior has changed -- poking the base
* changes only the base and, if FSGSBASE is not
- * available, this may not effect.
+ * available, this may have no effect once the tracee
+ * is resumed.
*/
if (gs == 0)
printf("\tNote: this is expected behavior on older kernels.\n");
--
2.25.4
next prev parent reply other threads:[~2020-06-24 22:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 22:50 [PATCH 0/3] x86/fsgsbase: Some fixes Andy Lutomirski
2020-06-24 22:50 ` Andy Lutomirski [this message]
2020-06-24 22:50 ` [PATCH 2/3] selftests/x86/fsgsbase: Add a missing memory constraint Andy Lutomirski
2020-06-24 22:50 ` [PATCH 3/3] x86/ptrace: Fix 32-bit PTRACE_SETREGS vs fsbase and gsbase Andy Lutomirski
2020-06-25 0:54 ` Andy Lutomirski
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