| Message ID | 20190823093835.32655-1-srinivas.kandagatla@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Eduardo Valentin |
| Headers | show |
| Series | drivers: thermal: qcom: tsens: Fix memory leak from qfprom read | expand |
On Fri, Aug 23, 2019 at 3:08 PM Srinivas Kandagatla <srinivas.kandagatla@linaro.org> wrote: > > memory returned as part of nvmem_read via qfprom_read should be > freed by the consumer once done. > Existing code is not doing it so fix it. > > Below memory leak detected by kmemleak > [<ffffff80088b7658>] kmemleak_alloc+0x50/0x84 > [<ffffff80081df120>] __kmalloc+0xe8/0x168 > [<ffffff80086db350>] nvmem_cell_read+0x30/0x80 > [<ffffff8008632790>] qfprom_read+0x4c/0x7c > [<ffffff80086335a4>] calibrate_v1+0x34/0x204 > [<ffffff8008632518>] tsens_probe+0x164/0x258 > [<ffffff80084e0a1c>] platform_drv_probe+0x80/0xa0 > [<ffffff80084de4f4>] really_probe+0x208/0x248 > [<ffffff80084de2c4>] driver_probe_device+0x98/0xc0 > [<ffffff80084dec54>] __device_attach_driver+0x9c/0xac > [<ffffff80084dca74>] bus_for_each_drv+0x60/0x8c > [<ffffff80084de634>] __device_attach+0x8c/0x100 > [<ffffff80084de6c8>] device_initial_probe+0x20/0x28 > [<ffffff80084dcbb8>] bus_probe_device+0x34/0x7c > [<ffffff80084deb08>] deferred_probe_work_func+0x6c/0x98 > [<ffffff80080c3da8>] process_one_work+0x160/0x2f8 > > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Acked-by: Amit Kucheria <amit.kucheria@linaro.org> > --- > drivers/thermal/qcom/tsens-8960.c | 2 ++ > drivers/thermal/qcom/tsens-v0_1.c | 12 ++++++++++-- > drivers/thermal/qcom/tsens-v1.c | 1 + > drivers/thermal/qcom/tsens.h | 1 + > 4 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c > index 8d9b721dadb6..e46a4e3f25c4 100644 > --- a/drivers/thermal/qcom/tsens-8960.c > +++ b/drivers/thermal/qcom/tsens-8960.c > @@ -229,6 +229,8 @@ static int calibrate_8960(struct tsens_priv *priv) > for (i = 0; i < num_read; i++, s++) > s->offset = data[i]; > > + kfree(data); > + > return 0; > } > > diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c > index 6f26fadf4c27..055647bcee67 100644 > --- a/drivers/thermal/qcom/tsens-v0_1.c > +++ b/drivers/thermal/qcom/tsens-v0_1.c > @@ -145,8 +145,10 @@ static int calibrate_8916(struct tsens_priv *priv) > return PTR_ERR(qfprom_cdata); > > qfprom_csel = (u32 *)qfprom_read(priv->dev, "calib_sel"); > - if (IS_ERR(qfprom_csel)) > + if (IS_ERR(qfprom_csel)) { > + kfree(qfprom_cdata); > return PTR_ERR(qfprom_csel); > + } > > mode = (qfprom_csel[0] & MSM8916_CAL_SEL_MASK) >> MSM8916_CAL_SEL_SHIFT; > dev_dbg(priv->dev, "calibration mode is %d\n", mode); > @@ -181,6 +183,8 @@ static int calibrate_8916(struct tsens_priv *priv) > } > > compute_intercept_slope(priv, p1, p2, mode); > + kfree(qfprom_cdata); > + kfree(qfprom_csel); > > return 0; > } > @@ -198,8 +202,10 @@ static int calibrate_8974(struct tsens_priv *priv) > return PTR_ERR(calib); > > bkp = (u32 *)qfprom_read(priv->dev, "calib_backup"); > - if (IS_ERR(bkp)) > + if (IS_ERR(bkp)) { > + kfree(calib); > return PTR_ERR(bkp); > + } > > calib_redun_sel = bkp[1] & BKP_REDUN_SEL; > calib_redun_sel >>= BKP_REDUN_SHIFT; > @@ -313,6 +319,8 @@ static int calibrate_8974(struct tsens_priv *priv) > } > > compute_intercept_slope(priv, p1, p2, mode); > + kfree(calib); > + kfree(bkp); > > return 0; > } > diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c > index 10b595d4f619..870f502f2cb6 100644 > --- a/drivers/thermal/qcom/tsens-v1.c > +++ b/drivers/thermal/qcom/tsens-v1.c > @@ -138,6 +138,7 @@ static int calibrate_v1(struct tsens_priv *priv) > } > > compute_intercept_slope(priv, p1, p2, mode); > + kfree(qfprom_cdata); > > return 0; > } > diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h > index 2fd94997245b..b89083b61c38 100644 > --- a/drivers/thermal/qcom/tsens.h > +++ b/drivers/thermal/qcom/tsens.h > @@ -17,6 +17,7 @@ > > #include <linux/thermal.h> > #include <linux/regmap.h> > +#include <linux/slab.h> > > struct tsens_priv; > > -- > 2.21.0 >
On Fri, 2019-08-23 at 17:29 +0530, Amit Kucheria wrote: > On Fri, Aug 23, 2019 at 3:08 PM Srinivas Kandagatla > <srinivas.kandagatla@linaro.org> wrote: > > > > memory returned as part of nvmem_read via qfprom_read should be > > freed by the consumer once done. > > Existing code is not doing it so fix it. > > > > Below memory leak detected by kmemleak > > [<ffffff80088b7658>] kmemleak_alloc+0x50/0x84 > > [<ffffff80081df120>] __kmalloc+0xe8/0x168 > > [<ffffff80086db350>] nvmem_cell_read+0x30/0x80 > > [<ffffff8008632790>] qfprom_read+0x4c/0x7c > > [<ffffff80086335a4>] calibrate_v1+0x34/0x204 > > [<ffffff8008632518>] tsens_probe+0x164/0x258 > > [<ffffff80084e0a1c>] platform_drv_probe+0x80/0xa0 > > [<ffffff80084de4f4>] really_probe+0x208/0x248 > > [<ffffff80084de2c4>] driver_probe_device+0x98/0xc0 > > [<ffffff80084dec54>] __device_attach_driver+0x9c/0xac > > [<ffffff80084dca74>] bus_for_each_drv+0x60/0x8c > > [<ffffff80084de634>] __device_attach+0x8c/0x100 > > [<ffffff80084de6c8>] device_initial_probe+0x20/0x28 > > [<ffffff80084dcbb8>] bus_probe_device+0x34/0x7c > > [<ffffff80084deb08>] deferred_probe_work_func+0x6c/0x98 > > [<ffffff80080c3da8>] process_one_work+0x160/0x2f8 > > > > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > > Acked-by: Amit Kucheria <amit.kucheria@linaro.org> patch applied. thanks, rui > > > --- > > drivers/thermal/qcom/tsens-8960.c | 2 ++ > > drivers/thermal/qcom/tsens-v0_1.c | 12 ++++++++++-- > > drivers/thermal/qcom/tsens-v1.c | 1 + > > drivers/thermal/qcom/tsens.h | 1 + > > 4 files changed, 14 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/thermal/qcom/tsens-8960.c > > b/drivers/thermal/qcom/tsens-8960.c > > index 8d9b721dadb6..e46a4e3f25c4 100644 > > --- a/drivers/thermal/qcom/tsens-8960.c > > +++ b/drivers/thermal/qcom/tsens-8960.c > > @@ -229,6 +229,8 @@ static int calibrate_8960(struct tsens_priv > > *priv) > > for (i = 0; i < num_read; i++, s++) > > s->offset = data[i]; > > > > + kfree(data); > > + > > return 0; > > } > > > > diff --git a/drivers/thermal/qcom/tsens-v0_1.c > > b/drivers/thermal/qcom/tsens-v0_1.c > > index 6f26fadf4c27..055647bcee67 100644 > > --- a/drivers/thermal/qcom/tsens-v0_1.c > > +++ b/drivers/thermal/qcom/tsens-v0_1.c > > @@ -145,8 +145,10 @@ static int calibrate_8916(struct tsens_priv > > *priv) > > return PTR_ERR(qfprom_cdata); > > > > qfprom_csel = (u32 *)qfprom_read(priv->dev, "calib_sel"); > > - if (IS_ERR(qfprom_csel)) > > + if (IS_ERR(qfprom_csel)) { > > + kfree(qfprom_cdata); > > return PTR_ERR(qfprom_csel); > > + } > > > > mode = (qfprom_csel[0] & MSM8916_CAL_SEL_MASK) >> > > MSM8916_CAL_SEL_SHIFT; > > dev_dbg(priv->dev, "calibration mode is %d\n", mode); > > @@ -181,6 +183,8 @@ static int calibrate_8916(struct tsens_priv > > *priv) > > } > > > > compute_intercept_slope(priv, p1, p2, mode); > > + kfree(qfprom_cdata); > > + kfree(qfprom_csel); > > > > return 0; > > } > > @@ -198,8 +202,10 @@ static int calibrate_8974(struct tsens_priv > > *priv) > > return PTR_ERR(calib); > > > > bkp = (u32 *)qfprom_read(priv->dev, "calib_backup"); > > - if (IS_ERR(bkp)) > > + if (IS_ERR(bkp)) { > > + kfree(calib); > > return PTR_ERR(bkp); > > + } > > > > calib_redun_sel = bkp[1] & BKP_REDUN_SEL; > > calib_redun_sel >>= BKP_REDUN_SHIFT; > > @@ -313,6 +319,8 @@ static int calibrate_8974(struct tsens_priv > > *priv) > > } > > > > compute_intercept_slope(priv, p1, p2, mode); > > + kfree(calib); > > + kfree(bkp); > > > > return 0; > > } > > diff --git a/drivers/thermal/qcom/tsens-v1.c > > b/drivers/thermal/qcom/tsens-v1.c > > index 10b595d4f619..870f502f2cb6 100644 > > --- a/drivers/thermal/qcom/tsens-v1.c > > +++ b/drivers/thermal/qcom/tsens-v1.c > > @@ -138,6 +138,7 @@ static int calibrate_v1(struct tsens_priv > > *priv) > > } > > > > compute_intercept_slope(priv, p1, p2, mode); > > + kfree(qfprom_cdata); > > > > return 0; > > } > > diff --git a/drivers/thermal/qcom/tsens.h > > b/drivers/thermal/qcom/tsens.h > > index 2fd94997245b..b89083b61c38 100644 > > --- a/drivers/thermal/qcom/tsens.h > > +++ b/drivers/thermal/qcom/tsens.h > > @@ -17,6 +17,7 @@ > > > > #include <linux/thermal.h> > > #include <linux/regmap.h> > > +#include <linux/slab.h> > > > > struct tsens_priv; > > > > -- > > 2.21.0 > >
diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c index 8d9b721dadb6..e46a4e3f25c4 100644 --- a/drivers/thermal/qcom/tsens-8960.c +++ b/drivers/thermal/qcom/tsens-8960.c @@ -229,6 +229,8 @@ static int calibrate_8960(struct tsens_priv *priv) for (i = 0; i < num_read; i++, s++) s->offset = data[i]; + kfree(data); + return 0; } diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c index 6f26fadf4c27..055647bcee67 100644 --- a/drivers/thermal/qcom/tsens-v0_1.c +++ b/drivers/thermal/qcom/tsens-v0_1.c @@ -145,8 +145,10 @@ static int calibrate_8916(struct tsens_priv *priv) return PTR_ERR(qfprom_cdata); qfprom_csel = (u32 *)qfprom_read(priv->dev, "calib_sel"); - if (IS_ERR(qfprom_csel)) + if (IS_ERR(qfprom_csel)) { + kfree(qfprom_cdata); return PTR_ERR(qfprom_csel); + } mode = (qfprom_csel[0] & MSM8916_CAL_SEL_MASK) >> MSM8916_CAL_SEL_SHIFT; dev_dbg(priv->dev, "calibration mode is %d\n", mode); @@ -181,6 +183,8 @@ static int calibrate_8916(struct tsens_priv *priv) } compute_intercept_slope(priv, p1, p2, mode); + kfree(qfprom_cdata); + kfree(qfprom_csel); return 0; } @@ -198,8 +202,10 @@ static int calibrate_8974(struct tsens_priv *priv) return PTR_ERR(calib); bkp = (u32 *)qfprom_read(priv->dev, "calib_backup"); - if (IS_ERR(bkp)) + if (IS_ERR(bkp)) { + kfree(calib); return PTR_ERR(bkp); + } calib_redun_sel = bkp[1] & BKP_REDUN_SEL; calib_redun_sel >>= BKP_REDUN_SHIFT; @@ -313,6 +319,8 @@ static int calibrate_8974(struct tsens_priv *priv) } compute_intercept_slope(priv, p1, p2, mode); + kfree(calib); + kfree(bkp); return 0; } diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c index 10b595d4f619..870f502f2cb6 100644 --- a/drivers/thermal/qcom/tsens-v1.c +++ b/drivers/thermal/qcom/tsens-v1.c @@ -138,6 +138,7 @@ static int calibrate_v1(struct tsens_priv *priv) } compute_intercept_slope(priv, p1, p2, mode); + kfree(qfprom_cdata); return 0; } diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 2fd94997245b..b89083b61c38 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -17,6 +17,7 @@ #include <linux/thermal.h> #include <linux/regmap.h> +#include <linux/slab.h> struct tsens_priv;
memory returned as part of nvmem_read via qfprom_read should be freed by the consumer once done. Existing code is not doing it so fix it. Below memory leak detected by kmemleak [<ffffff80088b7658>] kmemleak_alloc+0x50/0x84 [<ffffff80081df120>] __kmalloc+0xe8/0x168 [<ffffff80086db350>] nvmem_cell_read+0x30/0x80 [<ffffff8008632790>] qfprom_read+0x4c/0x7c [<ffffff80086335a4>] calibrate_v1+0x34/0x204 [<ffffff8008632518>] tsens_probe+0x164/0x258 [<ffffff80084e0a1c>] platform_drv_probe+0x80/0xa0 [<ffffff80084de4f4>] really_probe+0x208/0x248 [<ffffff80084de2c4>] driver_probe_device+0x98/0xc0 [<ffffff80084dec54>] __device_attach_driver+0x9c/0xac [<ffffff80084dca74>] bus_for_each_drv+0x60/0x8c [<ffffff80084de634>] __device_attach+0x8c/0x100 [<ffffff80084de6c8>] device_initial_probe+0x20/0x28 [<ffffff80084dcbb8>] bus_probe_device+0x34/0x7c [<ffffff80084deb08>] deferred_probe_work_func+0x6c/0x98 [<ffffff80080c3da8>] process_one_work+0x160/0x2f8 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> --- drivers/thermal/qcom/tsens-8960.c | 2 ++ drivers/thermal/qcom/tsens-v0_1.c | 12 ++++++++++-- drivers/thermal/qcom/tsens-v1.c | 1 + drivers/thermal/qcom/tsens.h | 1 + 4 files changed, 14 insertions(+), 2 deletions(-)