From: <sean.wang@mediatek.com> To: <nbd@nbd.name>, <lorenzo.bianconi@redhat.com> Cc: <sean.wang@mediatek.com>, <Soul.Huang@mediatek.com>, <YN.Chen@mediatek.com>, <Leon.Yen@mediatek.com>, <Eric-SY.Chang@mediatek.com>, <Deren.Wu@mediatek.com>, <km.lin@mediatek.com>, <robin.chiu@mediatek.com>, <ch.yeh@mediatek.com>, <posh.sun@mediatek.com>, <Eric.Liang@mediatek.com>, <Stella.Chang@mediatek.com>, <jemele@google.com>, <yenlinlai@google.com>, <linux-wireless@vger.kernel.org>, <linux-mediatek@lists.infradead.org> Subject: [PATCH] mt76: mt7921: fix the coredump is being truncated Date: Thu, 17 Jun 2021 09:39:19 +0800 [thread overview] Message-ID: <2ebb95099102ffe62c0fa8aedd95d7e77b5ca385.1623884856.git.objelf@gmail.com> (raw) From: Sean Wang <sean.wang@mediatek.com> Fix the maximum size of the coredump generated with current mt7921 firmware. Otherwise, a truncated coredump would be reported to userland via dev_coredumpv. Also, there is an additional error handling enhanced in the patch to avoid the possible invalid buffer access when the system failed to create the buffer to hold the coredump. Fixes: 0da3c795d07b ("mt76: mt7921: add coredump support") Co-developed-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> --- drivers/net/wireless/mediatek/mt76/mt76_connac.h | 2 +- drivers/net/wireless/mediatek/mt76/mt7921/mac.c | 9 ++++++--- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac.h b/drivers/net/wireless/mediatek/mt76/mt76_connac.h index 9b3f8d22f17e..d93ab1ece8ae 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76_connac.h +++ b/drivers/net/wireless/mediatek/mt76/mt76_connac.h @@ -13,7 +13,7 @@ #define MT76_CONNAC_MAX_SCAN_MATCH 16 #define MT76_CONNAC_COREDUMP_TIMEOUT (HZ / 20) -#define MT76_CONNAC_COREDUMP_SZ (128 * 1024) +#define MT76_CONNAC_COREDUMP_SZ (1300 * 1024) enum { CMD_CBW_20MHZ = IEEE80211_STA_RX_BW_20, diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index fb4de73df701..905dddbfbb0b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -1557,7 +1557,7 @@ void mt7921_coredump_work(struct work_struct *work) break; skb_pull(skb, sizeof(struct mt7921_mcu_rxd)); - if (data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) { + if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) { dev_kfree_skb(skb); continue; } @@ -1567,7 +1567,10 @@ void mt7921_coredump_work(struct work_struct *work) dev_kfree_skb(skb); } - dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ, - GFP_KERNEL); + + if (dump) + dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ, + GFP_KERNEL); + mt7921_reset(&dev->mt76); } -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: <sean.wang@mediatek.com> To: <nbd@nbd.name>, <lorenzo.bianconi@redhat.com> Cc: <sean.wang@mediatek.com>, <Soul.Huang@mediatek.com>, <YN.Chen@mediatek.com>, <Leon.Yen@mediatek.com>, <Eric-SY.Chang@mediatek.com>, <Deren.Wu@mediatek.com>, <km.lin@mediatek.com>, <robin.chiu@mediatek.com>, <ch.yeh@mediatek.com>, <posh.sun@mediatek.com>, <Eric.Liang@mediatek.com>, <Stella.Chang@mediatek.com>, <jemele@google.com>, <yenlinlai@google.com>, <linux-wireless@vger.kernel.org>, <linux-mediatek@lists.infradead.org> Subject: [PATCH] mt76: mt7921: fix the coredump is being truncated Date: Thu, 17 Jun 2021 09:39:19 +0800 [thread overview] Message-ID: <2ebb95099102ffe62c0fa8aedd95d7e77b5ca385.1623884856.git.objelf@gmail.com> (raw) From: Sean Wang <sean.wang@mediatek.com> Fix the maximum size of the coredump generated with current mt7921 firmware. Otherwise, a truncated coredump would be reported to userland via dev_coredumpv. Also, there is an additional error handling enhanced in the patch to avoid the possible invalid buffer access when the system failed to create the buffer to hold the coredump. Fixes: 0da3c795d07b ("mt76: mt7921: add coredump support") Co-developed-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> --- drivers/net/wireless/mediatek/mt76/mt76_connac.h | 2 +- drivers/net/wireless/mediatek/mt76/mt7921/mac.c | 9 ++++++--- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac.h b/drivers/net/wireless/mediatek/mt76/mt76_connac.h index 9b3f8d22f17e..d93ab1ece8ae 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76_connac.h +++ b/drivers/net/wireless/mediatek/mt76/mt76_connac.h @@ -13,7 +13,7 @@ #define MT76_CONNAC_MAX_SCAN_MATCH 16 #define MT76_CONNAC_COREDUMP_TIMEOUT (HZ / 20) -#define MT76_CONNAC_COREDUMP_SZ (128 * 1024) +#define MT76_CONNAC_COREDUMP_SZ (1300 * 1024) enum { CMD_CBW_20MHZ = IEEE80211_STA_RX_BW_20, diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index fb4de73df701..905dddbfbb0b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -1557,7 +1557,7 @@ void mt7921_coredump_work(struct work_struct *work) break; skb_pull(skb, sizeof(struct mt7921_mcu_rxd)); - if (data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) { + if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) { dev_kfree_skb(skb); continue; } @@ -1567,7 +1567,10 @@ void mt7921_coredump_work(struct work_struct *work) dev_kfree_skb(skb); } - dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ, - GFP_KERNEL); + + if (dump) + dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ, + GFP_KERNEL); + mt7921_reset(&dev->mt76); } -- 2.25.1 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek
next reply other threads:[~2021-06-17 1:39 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-17 1:39 sean.wang [this message] 2021-06-17 1:39 ` [PATCH] mt76: mt7921: fix the coredump is being truncated sean.wang 2021-06-17 13:52 ` Lorenzo Bianconi 2021-06-17 13:52 ` Lorenzo Bianconi [not found] <YMtTlS3Nh4uGnJvq@lore-desk--annotate> 2021-06-17 17:19 ` sean.wang 2021-06-17 17:19 ` sean.wang
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