From: Navid Emamdoost <navid.emamdoost@gmail.com> To: michal.simek@xilinx.com Cc: emamd001@umn.edu, smccaman@umn.edu, kjlu@umn.edu, Markus.Elfring@web.de, Navid Emamdoost <navid.emamdoost@gmail.com>, Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] clocksource/drivers: Fix memory leak in ttc_setup_clockevent Date: Tue, 22 Oct 2019 23:31:38 -0500 [thread overview] Message-ID: <20191023043139.31183-1-navid.emamdoost@gmail.com> (raw) In-Reply-To: <2a6cdb63-397b-280a-7379-740e8f43ddf6@xilinx.com> In the implementation of ttc_setup_clockevent() release the allocated memory for ttcce if clk_notifier_register() fails. Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error") Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> --- Changes in v2: - Added goto label for error handling - Update description and fix typo drivers/clocksource/timer-cadence-ttc.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c index 88fe2e9ba9a3..0caacbc67102 100644 --- a/drivers/clocksource/timer-cadence-ttc.c +++ b/drivers/clocksource/timer-cadence-ttc.c @@ -411,10 +411,8 @@ static int __init ttc_setup_clockevent(struct clk *clk, ttcce->ttc.clk = clk; err = clk_prepare_enable(ttcce->ttc.clk); - if (err) { - kfree(ttcce); - return err; - } + if (err) + goto release_ttcce; ttcce->ttc.clk_rate_change_nb.notifier_call = ttc_rate_change_clockevent_cb; @@ -424,7 +422,7 @@ static int __init ttc_setup_clockevent(struct clk *clk, &ttcce->ttc.clk_rate_change_nb); if (err) { pr_warn("Unable to register clock notifier.\n"); - return err; + goto release_ttcce; } ttcce->ttc.freq = clk_get_rate(ttcce->ttc.clk); @@ -453,15 +451,18 @@ static int __init ttc_setup_clockevent(struct clk *clk, err = request_irq(irq, ttc_clock_event_interrupt, IRQF_TIMER, ttcce->ce.name, ttcce); - if (err) { - kfree(ttcce); - return err; - } + if (err) + goto release_ttcce; clockevents_config_and_register(&ttcce->ce, ttcce->ttc.freq / PRESCALE, 1, 0xfffe); return 0; + +release_ttcce: + + kfree(ttcce); + return err; } /** -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Navid Emamdoost <navid.emamdoost@gmail.com> To: michal.simek@xilinx.com Cc: Daniel Lezcano <daniel.lezcano@linaro.org>, kjlu@umn.edu, linux-kernel@vger.kernel.org, emamd001@umn.edu, Markus.Elfring@web.de, smccaman@umn.edu, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org, Navid Emamdoost <navid.emamdoost@gmail.com> Subject: [PATCH v2] clocksource/drivers: Fix memory leak in ttc_setup_clockevent Date: Tue, 22 Oct 2019 23:31:38 -0500 [thread overview] Message-ID: <20191023043139.31183-1-navid.emamdoost@gmail.com> (raw) In-Reply-To: <2a6cdb63-397b-280a-7379-740e8f43ddf6@xilinx.com> In the implementation of ttc_setup_clockevent() release the allocated memory for ttcce if clk_notifier_register() fails. Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error") Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> --- Changes in v2: - Added goto label for error handling - Update description and fix typo drivers/clocksource/timer-cadence-ttc.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c index 88fe2e9ba9a3..0caacbc67102 100644 --- a/drivers/clocksource/timer-cadence-ttc.c +++ b/drivers/clocksource/timer-cadence-ttc.c @@ -411,10 +411,8 @@ static int __init ttc_setup_clockevent(struct clk *clk, ttcce->ttc.clk = clk; err = clk_prepare_enable(ttcce->ttc.clk); - if (err) { - kfree(ttcce); - return err; - } + if (err) + goto release_ttcce; ttcce->ttc.clk_rate_change_nb.notifier_call = ttc_rate_change_clockevent_cb; @@ -424,7 +422,7 @@ static int __init ttc_setup_clockevent(struct clk *clk, &ttcce->ttc.clk_rate_change_nb); if (err) { pr_warn("Unable to register clock notifier.\n"); - return err; + goto release_ttcce; } ttcce->ttc.freq = clk_get_rate(ttcce->ttc.clk); @@ -453,15 +451,18 @@ static int __init ttc_setup_clockevent(struct clk *clk, err = request_irq(irq, ttc_clock_event_interrupt, IRQF_TIMER, ttcce->ce.name, ttcce); - if (err) { - kfree(ttcce); - return err; - } + if (err) + goto release_ttcce; clockevents_config_and_register(&ttcce->ce, ttcce->ttc.freq / PRESCALE, 1, 0xfffe); return 0; + +release_ttcce: + + kfree(ttcce); + return err; } /** -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-23 4:31 UTC|newest] Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-21 20:18 [PATCH] clocksource/drivers: Fix memory leak in ttc_setup_clockevent Navid Emamdoost 2019-10-21 20:18 ` Navid Emamdoost 2019-10-22 8:26 ` Markus Elfring 2019-10-22 8:26 ` Markus Elfring 2019-10-22 8:26 ` Markus Elfring 2019-10-22 8:51 ` Michal Simek 2019-10-22 8:51 ` Michal Simek 2019-10-22 8:51 ` Michal Simek 2019-10-23 4:31 ` Navid Emamdoost [this message] 2019-10-23 4:31 ` [PATCH v2] " Navid Emamdoost 2019-10-23 7:32 ` Michal Simek 2019-10-23 7:32 ` Michal Simek 2019-10-23 8:00 ` Markus Elfring 2019-10-23 8:00 ` Markus Elfring 2019-10-23 8:00 ` Markus Elfring 2019-10-23 4:47 ` [PATCH] clocksource/drivers: Fix error handling in ttc_setup_clocksource Navid Emamdoost 2019-10-23 4:47 ` Navid Emamdoost 2019-10-23 7:24 ` Markus Elfring 2019-10-23 7:24 ` Markus Elfring 2019-10-23 7:24 ` Markus Elfring 2019-10-23 8:20 ` Markus Elfring 2019-10-23 8:20 ` Markus Elfring 2019-10-23 8:20 ` Markus Elfring 2019-10-23 10:31 ` Markus Elfring 2019-10-23 10:31 ` Markus Elfring 2019-10-23 10:31 ` Markus Elfring 2019-12-14 22:54 ` Navid Emamdoost 2019-12-14 22:54 ` Navid Emamdoost 2019-12-16 13:41 ` Daniel Lezcano 2019-12-16 13:41 ` Daniel Lezcano 2019-12-17 15:09 ` Michal Simek 2019-12-17 15:09 ` Michal Simek 2019-10-23 4:50 ` [PATCH] clocksource/drivers: Fix memory leak in ttc_setup_clockevent Navid Emamdoost 2019-10-23 4:50 ` Navid Emamdoost 2019-10-23 4:50 ` Navid Emamdoost
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