[PATCH v2] wifi: mt76: add a check of vzalloc in mt7615_coredump_work
From: void0red <hidden>
Date: 2023-02-27 13:52:56
Also in:
linux-arm-kernel, linux-mediatek, linux-wireless, lkml
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
From: Kang Chen <redacted>
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 <redacted>
---
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