Right now print_stack_trace prints timestamp twice, the first time
it's done by printk when printing spaces, the second - by print_ip_sym.
As a result, stack traces in KASAN reports have double timestamps:
[ 18.822232] Allocated by task 3838:
[ 18.822232] [ 18.822232] [<ffffffff8107e236>] save_stack_trace+0x16/0x20
[ 18.822232] [ 18.822232] [<ffffffff81509bd6>] save_stack+0x46/0xd0
[ 18.822232] [ 18.822232] [<ffffffff81509e4b>] kasan_kmalloc+0xab/0xe0
....
Fix by calling printk only once.
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
---
kernel/stacktrace.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index b6e4c16..56f510f 100644
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -14,13 +14,15 @@
void print_stack_trace(struct stack_trace *trace, int spaces)
{
int i;
+ unsigned long ip;
if (WARN_ON(!trace->entries))
return;
for (i = 0; i < trace->nr_entries; i++) {
- printk("%*c", 1 + spaces, ' ');
- print_ip_sym(trace->entries[i]);
+ ip = trace->entries[i];
+ printk("%*c[<%p>] %pS\n", 1 + spaces, ' ',
+ (void *) ip, (void *) ip);
}
}
EXPORT_SYMBOL_GPL(print_stack_trace);
--
2.8.0.rc3.226.g39d4020
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