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| author | Peter Collingbourne <pcc@google.com> | 2020-12-02 23:51:10 -0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-12-03 18:17:35 +0000 |
| commit | 929c1f3384d7e5cd319d03242cb925c3f91236f7 (patch) | |
| tree | ba11b43013151578ca0c5ac79a342e01e9a6344f /arch/arm64/kernel/mte.c | |
| parent | 9e5344e0ffc33f4fee899f98b6939a0682b1d9c3 (diff) | |
| download | linux-929c1f3384d7e5cd319d03242cb925c3f91236f7.tar.bz2 | |
arm64: mte: fix prctl(PR_GET_TAGGED_ADDR_CTRL) if TCF0=NONE
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
Fixes: af5ce95282dc ("arm64: mte: Allow user control of the generated random tags via prctl()")
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20201203075110.2781021-1-pcc@google.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/mte.c')
| -rw-r--r-- | arch/arm64/kernel/mte.c | 3 |
1 files changed, 2 insertions, 1 deletions
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; |