From: Wen Yang <wen.yang99@zte.com.cn> To: linus.walleij@linaro.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, alexandre.belloni@bootlin.com, UNGLinuxDriver@microchip.com, nbd@nbd.name, lorenzo.bianconi83@gmail.com, kvalo@codeaurora.org, matthias.bgg@gmail.com, linux-wireless@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, anirudh@xilinx.com, John.Linn@xilinx.com, michal.simek@xilinx.com, wang.yi59@zte.com.cn, Wen Yang <wen.yang99@zte.com.cn> Subject: [PATCH 3/5] mt76: fix a leaked reference by adding a missing of_node_put Date: Fri, 22 Feb 2019 15:15:40 +0800 [thread overview] Message-ID: <1550819742-32155-3-git-send-email-wen.yang99@zte.com.cn> (raw) In-Reply-To: <1550819742-32155-1-git-send-email-wen.yang99@zte.com.cn> The call to of_find_node_by_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./drivers/net/wireless/mediatek/mt76/eeprom.c:58:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:61:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:67:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:70:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:72:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Felix Fietkau <nbd@nbd.name> Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- drivers/net/wireless/mediatek/mt76/eeprom.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c index 530e559..a1529920d 100644 --- a/drivers/net/wireless/mediatek/mt76/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -54,22 +54,30 @@ mt76_get_of_eeprom(struct mt76_dev *dev, int len) part = np->name; mtd = get_mtd_device_nm(part); - if (IS_ERR(mtd)) - return PTR_ERR(mtd); + if (IS_ERR(mtd)) { + ret = PTR_ERR(mtd); + goto out_put_node; + } - if (size <= sizeof(*list)) - return -EINVAL; + if (size <= sizeof(*list)) { + ret = -EINVAL; + goto out_put_node; + } offset = be32_to_cpup(list); ret = mtd_read(mtd, offset, len, &retlen, dev->eeprom.data); put_mtd_device(mtd); if (ret) - return ret; + goto out_put_node; - if (retlen < len) - return -EINVAL; + if (retlen < len) { + ret = -EINVAL; + goto out_put_node; + } - return 0; +out_put_node: + of_node_put(np); + return ret; #else return -ENOENT; #endif -- 2.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Wen Yang <wen.yang99@zte.com.cn> To: linus.walleij@linaro.org Cc: wang.yi59@zte.com.cn, andrew@lunn.ch, alexandre.belloni@bootlin.com, f.fainelli@gmail.com, michal.simek@xilinx.com, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, Wen Yang <wen.yang99@zte.com.cn>, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, anirudh@xilinx.com, lorenzo.bianconi83@gmail.com, UNGLinuxDriver@microchip.com, John.Linn@xilinx.com, vivien.didelot@gmail.com, kvalo@codeaurora.org, nbd@nbd.name Subject: [PATCH 3/5] mt76: fix a leaked reference by adding a missing of_node_put Date: Fri, 22 Feb 2019 15:15:40 +0800 [thread overview] Message-ID: <1550819742-32155-3-git-send-email-wen.yang99@zte.com.cn> (raw) In-Reply-To: <1550819742-32155-1-git-send-email-wen.yang99@zte.com.cn> The call to of_find_node_by_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./drivers/net/wireless/mediatek/mt76/eeprom.c:58:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:61:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:67:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:70:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:72:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Felix Fietkau <nbd@nbd.name> Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- drivers/net/wireless/mediatek/mt76/eeprom.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c index 530e559..a1529920d 100644 --- a/drivers/net/wireless/mediatek/mt76/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -54,22 +54,30 @@ mt76_get_of_eeprom(struct mt76_dev *dev, int len) part = np->name; mtd = get_mtd_device_nm(part); - if (IS_ERR(mtd)) - return PTR_ERR(mtd); + if (IS_ERR(mtd)) { + ret = PTR_ERR(mtd); + goto out_put_node; + } - if (size <= sizeof(*list)) - return -EINVAL; + if (size <= sizeof(*list)) { + ret = -EINVAL; + goto out_put_node; + } offset = be32_to_cpup(list); ret = mtd_read(mtd, offset, len, &retlen, dev->eeprom.data); put_mtd_device(mtd); if (ret) - return ret; + goto out_put_node; - if (retlen < len) - return -EINVAL; + if (retlen < len) { + ret = -EINVAL; + goto out_put_node; + } - return 0; +out_put_node: + of_node_put(np); + return ret; #else return -ENOENT; #endif -- 2.9.5 _______________________________________________ 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:[~2019-02-22 7:16 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-22 7:15 [PATCH 1/5] net: dsa: fix a leaked reference by adding a missing of_node_put Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-22 7:15 ` [PATCH 2/5] net: mscc: ocelot: " Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-22 7:15 ` Wen Yang [this message] 2019-02-22 7:15 ` [PATCH 3/5] mt76: " Wen Yang 2019-02-28 8:39 ` Kalle Valo 2019-02-28 8:39 ` Kalle Valo 2019-02-28 8:39 ` Kalle Valo 2019-02-28 8:39 ` Kalle Valo 2019-04-05 13:15 ` Markus Elfring 2019-04-05 13:15 ` Markus Elfring [not found] ` <799adbb0-23a6-bf20-f22d-4af68e9d0012-S0/GAf8tV78@public.gmane.org> 2019-04-08 6:55 ` [PATCH 3/5] mt76: fix a leaked reference by adding a missingof_node_put wen.yang99-Th6q7B73Y6EnDS1+zs4M5A 2019-04-08 7:37 ` Markus Elfring 2019-04-08 7:37 ` Markus Elfring 2019-02-22 7:15 ` [PATCH 4/5] net: xilinx: fix a leaked reference by adding missing of_node_put Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-22 7:15 ` [PATCH 5/5] net: dsa: " Wen Yang 2019-02-22 7:15 ` Wen Yang 2019-02-24 20:32 ` David Miller 2019-02-24 20:32 ` David Miller 2019-02-22 10:38 ` [PATCH 1/5] net: dsa: fix a leaked reference by adding a " Linus Walleij 2019-02-22 10:38 ` Linus Walleij 2019-02-22 10:38 ` Linus Walleij
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