From: Chris Down Date: Fri, 21 Aug 2020 12:10:35 +0000 (+0100) Subject: x86/msr: Make source of unrecognised MSR writes unambiguous X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c31feed8461fb8648075ba9b53d9e527d530972f;p=linux.git x86/msr: Make source of unrecognised MSR writes unambiguous In many cases, task_struct.comm isn't enough to distinguish the offender, since for interpreted languages it's likely just going to be "python3" or whatever. Add the pid to make it unambiguous. [ bp: Make the printk string a single line for easier grepping. ] Signed-off-by: Chris Down Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/6f6fbd0ee6c99bc5e47910db700a6642159db01b.1598011595.git.chris@chrisdown.name --- diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c index b03001dfc6134..c0d4098106589 100644 --- a/arch/x86/kernel/msr.c +++ b/arch/x86/kernel/msr.c @@ -102,8 +102,8 @@ static int filter_write(u32 reg) if (reg == MSR_IA32_ENERGY_PERF_BIAS) return 0; - pr_err("Write to unrecognized MSR 0x%x by %s\n" - "Please report to x86@kernel.org\n", reg, current->comm); + pr_err("Write to unrecognized MSR 0x%x by %s (pid: %d). Please report to x86@kernel.org.\n", + reg, current->comm, current->pid); return 0; }