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| author | Tom Rix <trix@redhat.com> | 2022-03-26 12:42:36 -0700 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2022-03-29 22:45:50 +0200 |
| commit | 915593a7a663b2ad08b895a5f3ba8b19d89d4ebf (patch) | |
| tree | b0921c38fe1b4ac67b40cfb221562b5c01c50f78 /drivers/rtc | |
| parent | 4b2dc39ca024990abe36ad5d145c4fe0c06afd34 (diff) | |
| download | lwn-915593a7a663b2ad08b895a5f3ba8b19d89d4ebf.tar.gz lwn-915593a7a663b2ad08b895a5f3ba8b19d89d4ebf.zip | |
rtc: check if __rtc_read_time was successful
Clang static analysis reports this issue
interface.c:810:8: warning: Passed-by-value struct
argument contains uninitialized data
now = rtc_tm_to_ktime(tm);
^~~~~~~~~~~~~~~~~~~
tm is set by a successful call to __rtc_read_time()
but its return status is not checked. Check if
it was successful before setting the enabled flag.
Move the decl of err to function scope.
Fixes: 2b2f5ff00f63 ("rtc: interface: ignore expired timers when enqueuing new timers")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220326194236.2916310-1-trix@redhat.com
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/interface.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index d8e835798153..9edd662c69ac 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -804,9 +804,13 @@ static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer) struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue); struct rtc_time tm; ktime_t now; + int err; + + err = __rtc_read_time(rtc, &tm); + if (err) + return err; timer->enabled = 1; - __rtc_read_time(rtc, &tm); now = rtc_tm_to_ktime(tm); /* Skip over expired timers */ @@ -820,7 +824,6 @@ static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer) trace_rtc_timer_enqueue(timer); if (!next || ktime_before(timer->node.expires, next->expires)) { struct rtc_wkalrm alarm; - int err; alarm.time = rtc_ktime_to_tm(timer->node.expires); alarm.enabled = 1; |