From: Peter Collingbourne <pcc@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Collingbourne <pcc@google.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: [PATCH] arm64: mte: fix prctl(PR_GET_TAGGED_ADDR_CTRL) if TCF0=NONE
Date: Wed, 2 Dec 2020 23:51:10 -0800 [thread overview]
Message-ID: <20201203075110.2781021-1-pcc@google.com> (raw)
Previously we were always returning a tag inclusion mask of zero via
PR_GET_TAGGED_ADDR_CTRL if TCF0 was set to NONE. Fix it by making
the code for the NONE case match the others.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/Iefbea66cf7d2b4c80b82f9639b9ea7f33f7fac53
---
arch/arm64/kernel/mte.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
index 52a0638ed967..ef15c8a2a49d 100644
--- a/arch/arm64/kernel/mte.c
+++ b/arch/arm64/kernel/mte.c
@@ -189,7 +189,8 @@ long get_mte_ctrl(struct task_struct *task)
switch (task->thread.sctlr_tcf0) {
case SCTLR_EL1_TCF0_NONE:
- return PR_MTE_TCF_NONE;
+ ret |= PR_MTE_TCF_NONE;
+ break;
case SCTLR_EL1_TCF0_SYNC:
ret |= PR_MTE_TCF_SYNC;
break;
--
2.29.2.454.gaff20da3a2-goog
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next reply other threads:[~2020-12-03 7:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 7:51 Peter Collingbourne [this message]
2020-12-03 14:51 ` [PATCH] arm64: mte: fix prctl(PR_GET_TAGGED_ADDR_CTRL) if TCF0=NONE Catalin Marinas
2020-12-03 18:38 ` Will Deacon
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