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| author | Andy Lutomirski <luto@amacapital.net> | 2014-07-21 18:49:14 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2014-09-03 14:58:17 -0700 |
| commit | a4412fc9486ec85686c6c7929e7e829f62ae377e (patch) | |
| tree | a267720d880085452257406ecf6f672ec8cbdbf9 /arch/mips/kernel/ptrace.c | |
| parent | 70c8038dd698b44daf7c8fc7e2eca142bec694c4 (diff) | |
| download | linux-a4412fc9486ec85686c6c7929e7e829f62ae377e.tar.bz2 | |
seccomp,x86,arm,mips,s390: Remove nr parameter from secure_computing
The secure_computing function took a syscall number parameter, but
it only paid any attention to that parameter if seccomp mode 1 was
enabled. Rather than coming up with a kludge to get the parameter
to work in mode 2, just remove the parameter.
To avoid churn in arches that don't have seccomp filters (and may
not even support syscall_get_nr right now), this leaves the
parameter in secure_computing_strict, which is now a real function.
For ARM, this is a bit ugly due to the fact that ARM conditionally
supports seccomp filters. Fixing that would probably only be a
couple of lines of code, but it should be coordinated with the audit
maintainers.
This will be a slight slowdown on some arches. The right fix is to
pass in all of seccomp_data instead of trying to make just the
syscall nr part be fast.
This is a prerequisite for making two-phase seccomp work cleanly.
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: x86@kernel.org
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/mips/kernel/ptrace.c')
| -rw-r--r-- | arch/mips/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index 645b3c4fcfba..f7aac5b57b4b 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -770,7 +770,7 @@ asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall) long ret = 0; user_exit(); - if (secure_computing(syscall) == -1) + if (secure_computing() == -1) return -1; if (test_thread_flag(TIF_SYSCALL_TRACE) && |