Re: printk: Add kernel parameter to disable writes to /dev/kmsg

2016-04-27 Thread Austin S. Hemmelgarn
On 2016-04-26 15:47, Steven Rostedt wrote: On Tue, 26 Apr 2016 20:44:58 +0200 Pavel Machek wrote: I simply propose a way to let us kernel developers keep user space from interfering, by adding a new kernel command line parameter that will disable writing to /dev/kmsg. Any attempt to open the f

Re: printk: Add kernel parameter to disable writes to /dev/kmsg

2016-04-26 Thread Steven Rostedt
On Tue, 26 Apr 2016 20:44:58 +0200 Pavel Machek wrote: > > I simply propose a way to let us kernel developers keep user space from > > interfering, by adding a new kernel command line parameter that will > > disable writing to /dev/kmsg. Any attempt to open the file in write > > mode will return

Re: printk: Add kernel parameter to disable writes to /dev/kmsg

2016-04-26 Thread Pavel Machek
On Mon 2016-04-25 13:06:29, Steven Rostedt wrote: > Over the weekend my server was acting funny. The display wasn't working > well, and I assumed that a driver was going bad. I went to look at the > kernel dmesg, but the buffer only had the following over and over: > > [226062.401405] systemd-logi

Re: printk: Add kernel parameter to disable writes to /dev/kmsg

2016-04-25 Thread Peter Zijlstra
On Mon, Apr 25, 2016 at 01:06:29PM -0400, Steven Rostedt wrote: > Over the weekend my server was acting funny. The display wasn't working > well, and I assumed that a driver was going bad. I went to look at the > kernel dmesg, but the buffer only had the following over and over: > > [226062.401405