Messages in this thread | | | Date | Mon, 25 Apr 2016 20:32:50 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] printk: Add kernel parameter to disable writes to /dev/kmsg |
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On Mon, Apr 25, 2016 at 01:08:53PM -0400, Steven Rostedt wrote: > [ Sorry for the resend, I forgot to add "[PATCH]" to the subject, which > may make this fail filters. ] > > 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:
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> + disable_devkmsg_write > + Disable writing to /dev/kmsg. This prevents user space > + tools from writing into the kernel printk buffers. > + When set, opening /dev/kmsg for write mode will return > + -EPERM.
I like the general idea.
Perhaps can call that param "printk.disable_devkmsg" or so with the proper namespace and in light of printk.always_kmsg_dump=...
Anyway, just my 2¢.
Thanks.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply.
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