[v2,2/2] x86: Make source of unrecognised MSR writes unambiguous
diff mbox series

Message ID 6f6fbd0ee6c99bc5e47910db700a6642159db01b.1598011595.git.chris@chrisdown.name
State New, archived
Headers show
Series
  • a couple of userspace MSR filtering improvements
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Commit Message

Chris Down Aug. 21, 2020, 12:10 p.m. UTC
In many cases the comm enough 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.

Signed-off-by: Chris Down <chris@chrisdown.name>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jakub Kicinski <kuba@kernel.org>
---
 arch/x86/kernel/msr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index eaf375245549..812e64ef5ff5 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -102,8 +102,9 @@  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)\n"
+	       "Please report to x86@kernel.org\n",
+	       reg, current->comm, current->pid);
 
 	return 0;
 }