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Message-Id: <20230227135241.947052-1-void0red@gmail.com> Date: Mon, 27 Feb 2023 21:52:41 +0800 From: void0red <void0red@...il.com> To: lorenzo.bianconi@...hat.com Cc: angelogioacchino.delregno@...labora.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, kvalo@...nel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org, linux-wireless@...r.kernel.org, lorenzo@...nel.org, matthias.bgg@...il.com, nbd@....name, netdev@...r.kernel.org, pabeni@...hat.com, ryder.lee@...iatek.com, sean.wang@...iatek.com, shayne.chen@...iatek.com, void0red@...il.com Subject: [PATCH v2] wifi: mt76: add a check of vzalloc in mt7615_coredump_work From: Kang Chen <void0red@...il.com> vzalloc may fails, dump might be null and will cause illegal address access later. Fixes: d2bf7959d9c0 ("mt76: mt7663: introduce coredump support") Signed-off-by: Kang Chen <void0red@...il.com> --- v2 -> v1: add Fixes tag drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c index a95602473..73d84c301 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c @@ -2367,6 +2367,9 @@ void mt7615_coredump_work(struct work_struct *work) } dump = vzalloc(MT76_CONNAC_COREDUMP_SZ); + if (!dump) + return; + data = dump; while (true) { -- 2.34.1
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