[PATCH 0/3] x86/entry: Fix 3 suspicious bugs

Lai Jiangshan
2021-12-13T04:22:06Z

From: Lai Jiangshan <laijs@linux.alibaba.com>

The problems described in patch1/patch2 can only happen when the system
owner is really paranoid.

For patch3, I hardly believe #VC can hit in the code range returining
to user without implementing more SEV features.

Lai Jiangshan (3):
X86/db: Change __this_cpu_read() to this_cpu_read() in
hw_breakpoint_active()
x86/hw_breakpoint: Add stack_canary to hw_breakpoints denylist
x86/sev: The code for returning to user space is also in syscall gap

arch/x86/entry/entry_64.S | 2 ++
arch/x86/entry/entry_64_compat.S | 2 ++
arch/x86/include/asm/debugreg.h | 2 +-
arch/x86/include/asm/proto.h | 4 ++++
arch/x86/include/asm/ptrace.h | 4 ++++
arch/x86/kernel/hw_breakpoint.c | 8 ++++++++
6 files changed, 21 insertions(+), 1 deletion(-)

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2.19.1.6.gb485710b