linux-kernel - [PATCH] alpha: osf_sys: reduce kernel log spamming on invalid osf

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Date:   Mon, 13 Dec 2021 18:56:25 +0000
From:   Colin Ian King <colin.i.king@...il.com>
To:     Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        linux-alpha@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] alpha: osf_sys: reduce kernel log spamming on invalid osf_mount call typenr

Calling the osf_mount system call with an invalid typenr value will
spam the kernel log with error messages. Reduce the spamming by making
it a ratelimited printk.  Issue found when exercising with the stress-ng
enosys system call stressor.

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 arch/alpha/kernel/osf_sys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 8bbeebb73cf0..2367a385d726 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -521,7 +521,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
 		break;
 	default:
 		retval = -EINVAL;
-		printk("osf_mount(%ld, %x)\n", typenr, flag);
+		printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
 	}
 
 	return retval;
-- 
2.33.1