From: Andreas Schwab Date: Mon, 21 Dec 2020 22:52:00 +0000 (+0100) Subject: riscv: return -ENOSYS for syscall -1 X-Git-Tag: accepted/tizen/unified/20230118.172025~8070^2~15 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cf7b2ae4d70432fa94ebba3fbaab825481ae7189;p=platform%2Fkernel%2Flinux-rpi.git riscv: return -ENOSYS for syscall -1 Properly return -ENOSYS for syscall -1 instead of leaving the return value uninitialized. This fixes the strace teststuite. Fixes: 5340627e3fe0 ("riscv: add support for SECCOMP and SECCOMP_FILTER") Cc: stable@vger.kernel.org Signed-off-by: Andreas Schwab Reviewed-by: Tycho Andersen Signed-off-by: Palmer Dabbelt --- diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 524d918..d077630 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -186,14 +186,7 @@ check_syscall_nr: * Syscall number held in a7. * If syscall number is above allowed value, redirect to ni_syscall. */ - bge a7, t0, 1f - /* - * Check if syscall is rejected by tracer, i.e., a7 == -1. - * If yes, we pretend it was executed. - */ - li t1, -1 - beq a7, t1, ret_from_syscall_rejected - blt a7, t1, 1f + bgeu a7, t0, 1f /* Call syscall */ la s0, sys_call_table slli t0, a7, RISCV_LGPTR