在 2021/7/31 11:14, Yu Changchun 写道:
From: Russell King <rmk+kernel@armlinux.org.uk>
stable inclusion from linux-4.19.177 commit 80ef523d2cb719c3de66787e922a96b5099d2fbb category: bugfix issue: #I42HM6 CVE: CVE-2021-21781
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[ Upstream commit 9c698bff66ab4914bb3d71da7dc6112519bde23e ]
Ensure that the signal page contains our poison instruction to increase the protection against ROP attacks and also contains well defined contents.
Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Yu Changchun <yuchangchun1@huawei.com> --- arch/arm/kernel/signal.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
Looks good to me.