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Revision 66cb3a2d7ad0d0e9af4d3430a4f2a32ffb9ac098 authored by David Arcari on 26 May 2022, 20:31:40 UTC, committed by Hans de Goede on 10 June 2022, 19:59:08 UTC 
platform/x86/intel: Fix pmt_crashlog array reference
 
The probe function pmt_crashlog_probe() may incorrectly reference
the 'priv->entry array' as it uses 'i' to reference the array instead
of 'priv->num_entries' as it should.  This is similar to the problem
that was addressed in pmt_telemetry_probe via commit 2cdfa0c20d58
("platform/x86/intel: Fix 'rmmod pmt_telemetry' panic").

Cc: "David E. Box" <david.e.box@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mark Gross <markgross@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: David Arcari <darcari@redhat.com>
Reviewed-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20220526203140.339120-1-darcari@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
1 parent b9c29f3
Raw File
trace_output_kern.c 
#include <linux/ptrace.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "trace_common.h"

struct {
	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
	__uint(key_size, sizeof(int));
	__uint(value_size, sizeof(u32));
	__uint(max_entries, 2);
} my_map SEC(".maps");

SEC("kprobe/" SYSCALL(sys_write))
int bpf_prog1(struct pt_regs *ctx)
{
	struct S {
		u64 pid;
		u64 cookie;
	} data;

	data.pid = bpf_get_current_pid_tgid();
	data.cookie = 0x12345678;

	bpf_perf_event_output(ctx, &my_map, 0, &data, sizeof(data));

	return 0;
}

char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
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