Timothy E Baldwin 1f8884d044 arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL) ... commit df84fe94708985cdfb78a83148322bcd0a699472 upstream. Since commit f086f67485 ("arm64: ptrace: add support for syscall emulation"), if system call number -1 is called and the process is being traced with PTRACE_SYSCALL, for example by strace, the seccomp check is skipped and -ENOSYS is returned unconditionally (unless altered by the tracer) rather than carrying out action specified in the seccomp filter. The consequence of this is that it is not possible to reliably strace a seccomp based implementation of a foreign system call interface in which r7/x8 is permitted to be -1 on entry to a system call. Also trace_sys_enter and audit_syscall_entry are skipped if a system call is skipped. Fix by removing the in_syscall(regs) check restoring the previous behaviour which is like AArch32, x86 (which uses generic code) and everything else. Cc: Oleg Nesterov <oleg@redhat.com> Cc: Catalin Marinas<catalin.marinas@arm.com> Cc: <stable@vger.kernel.org> Fixes: f086f67485 ("arm64: ptrace: add support for syscall emulation") Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk> Link: https://lore.kernel.org/r/90edd33b-6353-1228-791f-0336d94d5f8c@majoroak.me.uk Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-03-09 11:09:38 +01:00
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boot	dts64: mt7622: fix slow sd card access	2021-03-04 10:26:45 +01:00
configs	…
crypto	crypto: arm64/sha - add missing module aliases	2021-03-04 10:26:44 +01:00
include	arm64: Do not pass tagged addresses to __is_lm_address()	2021-02-07 15:35:47 +01:00
kernel	arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL)	2021-03-09 11:09:38 +01:00
kvm	KVM: arm64: Don't access PMCR_EL0 when no PMU is available	2021-01-17 14:05:38 +01:00
lib	arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S	2020-11-10 12:37:24 +01:00
mm	arm64: Do not pass tagged addresses to __is_lm_address()	2021-02-07 15:35:47 +01:00
net	…
xen	…
Kbuild	…
Kconfig	arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55	2021-03-04 10:26:49 +01:00
Kconfig.debug	…
Kconfig.platforms	arm64: berlin: Select DW_APB_TIMER_OF	2020-11-05 11:43:36 +01:00
Makefile	arm64: link with -z norelro regardless of CONFIG_RELOCATABLE	2020-11-01 12:01:02 +01:00