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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 12:18:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 12:18:46 -0700
commit41ba485ef1d0dca98c5b194b8fb19201e123a08d (patch)
tree93ce1d469c10db1662e3da3e7dd92c892ed1f390 /kernel
parenta84d2d2906f983fb80f5dcc3e8e7c3ad70aa9f0d (diff)
parent6d54ceb539aacc3df65c89500e8b045924f3ef81 (diff)
Merge tag 'trace-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt: "Eiichi Tsukata found a small bug from the fixup of the stack code Removing ULONG_MAX as the marker for the user stack trace end, made the tracing code not know where the end is. The end is now marked with a zero (NULL) pointer. Eiichi fixed this in the tracing code" * tag 'trace-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Fix user stack trace "??" output
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_output.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index ba751f993c3b..cab4a5398f1d 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -1109,17 +1109,10 @@ static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
unsigned long ip = field->caller[i];
- if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
+ if (!ip || trace_seq_has_overflowed(s))
break;
trace_seq_puts(s, " => ");
-
- if (!ip) {
- trace_seq_puts(s, "??");
- trace_seq_putc(s, '\n');
- continue;
- }
-
seq_print_user_ip(s, mm, ip, flags);
trace_seq_putc(s, '\n');
}