From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELv99/uTEaSDrxQUrBjJi++U5fj0ZC43wOugYpS6GHLQVKwL3GxDr02+eENmlap5qDj5oOuC ARC-Seal: i=1; a=rsa-sha256; t=1519676675; cv=none; d=google.com; s=arc-20160816; b=B46hgTltqf/v/bnPWoEaRRG5wX1ObaEIhj9W2gByb3nYvRmW/rN0mwXk3m+UtmYegO NohZoUjLXikq0F6/XUGzi+JbndQ/BZfZOpxtiwFL7czc2StYUoV2kDeRiP8hK/igzEYG +DS465baqq+dquI7oNnqdznCpS8YjNVr9H2T9JMKX7Pw0QlOTapfysxuRJsLX5Dr9vWf OMlfhbhZZ1xN0weJcGhlBGP6M5YJzW+XJzrfxOc3eYKAnNB9kTc2jZHRCRCK6+NKb9fl khncnTfUso/kvnlvd6rXpeQ2McUrvKZJGEV0R7uVfy2CIfQW5nmPGaHMKNlhrcod5Ax2 whZw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=/VvjL1CR8fYSJKNgwusDLHpQSqJkzAAFrK5PnLQL1rc=; b=1KuCyc0VRhEiY6oncasbhY43ITfnvAZrpDzxlin4YtH5UTusYznSYbB42XjeI4Dx+5 y8sAHIHUlQ67xJX1NjtFOhFE5neibuOSgEZFZAKjSZlp7jTtEo1TVNW46b9wPix5z1gt jzArnuA5XXHNO7+83maRhKOKa8QpI0Rhd0UbaU9IZkiHvcxgdDPRDsrT2g0Iu5n6rmOg x/uanzgzbCGCVx5j4IQgLz4MfFm0Gg/7RO4wQndWIHL0RuLkjhwF747nw4OFJPqrfG63 liRAnr8XhAt1ajdUwtx1u4gzFs3ZtGbvnD5pUDhG1uxxMKL9weCivf3m4Nhj9wsdqpWg BYOg== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 83.175.124.243 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 83.175.124.243 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Will Deacon , Michael Weiser Subject: [PATCH 4.14 33/54] arm64: Remove unimplemented syscall log message Date: Mon, 26 Feb 2018 21:22:10 +0100 Message-Id: <20180226202146.045950031@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180226202144.375869933@linuxfoundation.org> References: <20180226202144.375869933@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1593496489575231525?= X-GMAIL-MSGID: =?utf-8?q?1593496489575231525?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Michael Weiser commit 1962682d2b2fbe6cfa995a85c53c069fadda473e upstream. Stop printing a (ratelimited) kernel message for each instance of an unimplemented syscall being called. Userland making an unimplemented syscall is not necessarily misbehaviour and to be expected with a current userland running on an older kernel. Also, the current message looks scary to users but does not actually indicate a real problem nor help them narrow down the cause. Just rely on sys_ni_syscall() to return -ENOSYS. Cc: Acked-by: Will Deacon Signed-off-by: Michael Weiser Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/traps.c | 8 -------- 1 file changed, 8 deletions(-) --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -573,14 +573,6 @@ asmlinkage long do_ni_syscall(struct pt_ } #endif - if (show_unhandled_signals_ratelimited()) { - pr_info("%s[%d]: syscall %d\n", current->comm, - task_pid_nr(current), regs->syscallno); - dump_instr("", regs); - if (user_mode(regs)) - __show_regs(regs); - } - return sys_ni_syscall(); }