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alistair23-linux/kernel/entry
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Thomas Gleixner d88d59b64c core/entry: Respect syscall number rewrites 
The transcript of the x86 entry code to the generic version failed to
reload the syscall number from ptregs after ptrace and seccomp have run,
which both can modify the syscall number in ptregs. It returns the original
syscall number instead which is obviously not the right thing to do.

Reload the syscall number to fix that.

Fixes: 142781e108 ("entry: Provide generic syscall entry functionality")
Reported-by: Kyle Huey <me@kylehuey.com> 
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kyle Huey <me@kylehuey.com> 
Tested-by: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/87blj6ifo8.fsf@nanos.tec.linutronix.de
 		2020-08-21 16:17:29 +02:00
..
Makefile entry: Provide infrastructure for work before transitioning to guest mode 2020-07-24 15:03:42 +02:00
common.c core/entry: Respect syscall number rewrites 2020-08-21 16:17:29 +02:00
kvm.c entry: Provide infrastructure for work before transitioning to guest mode 2020-07-24 15:03:42 +02:00