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Commit f8423920 authored by Jin Qian's avatar Jin Qian
Browse files

uid_cputime: fix cputime overflow 



Converting cputime_t to usec caused overflow when the value is greater
than 1 hour. Use msec and convert to unsigned long long to support bigger
range.

Bug: 22461683

Change-Id: I853fe3e8e7dbf0d3e2cc5c6f9688a5a6e1f1fb3e
Signed-off-by: default avatarJin Qian <jinqian@google.com>
parent 8d9bfe75

drivers/misc/uid_cputime.c

+6 −4
Original line number Diff line number Diff line
@@ -119,9 +119,11 @@ static int uid_stat_show(struct seq_file *m, void *v) 
							uid_entry->active_stime;

		unsigned long long total_power = uid_entry->power +

							uid_entry->active_power;

		seq_printf(m, "%d: %u %u %llu\n", uid_entry->uid,

						cputime_to_usecs(total_utime),

						cputime_to_usecs(total_stime),

		seq_printf(m, "%d: %llu %llu %llu\n", uid_entry->uid,

			(unsigned long long)jiffies_to_msecs(

				cputime_to_jiffies(total_utime)) * USEC_PER_MSEC,

			(unsigned long long)jiffies_to_msecs(

				cputime_to_jiffies(total_stime)) * USEC_PER_MSEC,

			total_power);

	}