From e400a40cffa77e45c60c5431ec8757579247cae2 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 12 Nov 2014 21:11:59 -0500 Subject: [PATCH] tracing: Fix trace_seq_bitmask() to start at current position In trace_seq_bitmask() it calls bitmap_scnprintf() not from the current position of the trace_seq buffer (s->buffer + s->len), but instead from the beginning of the buffer (s->buffer). Luckily, the only user of this "ipi_raise tracepoint" uses it as the first parameter, and as such, the start of the temp buffer in include/trace/ftrace.h (see __get_bitmask()). Reported-by: Petr Mladek Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- kernel/trace/trace_seq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_seq.c b/kernel/trace/trace_seq.c index 1f24ed99dca2..b100994a17fe 100644 --- a/kernel/trace/trace_seq.c +++ b/kernel/trace/trace_seq.c @@ -122,7 +122,7 @@ int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, if (s->full || !len) return 0; - ret = bitmap_scnprintf(s->buffer, len, maskp, nmaskbits); + ret = bitmap_scnprintf(s->buffer + s->len, len, maskp, nmaskbits); s->len += ret; return 1; -- 2.20.1