x86/entry: Assert that syscalls are on the right stack

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Now that the entry stack is a full page, it's too easy to regress the
system call entry code and end up on the wrong stack without noticing.
Assert that all system calls (SYSCALL64, SYSCALL32, SYSENTER, and INT80)
are on the right stack and have pt_regs in the right place.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/52059e42bb0ab8551153d012d68f7be18d72ff8e.1593191971.git.luto@kernel.org

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Andy Lutomirski 2020-06-26 10:21:11 -07:00 • committed by Thomas Gleixner

parent 009bce1df0

commit c9c26150e6

1 changed files with 15 additions and 3 deletions

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arch/x86/entry/common.c

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