From 426ffc563a94ca12531ff8a2df598185ba88487e Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Sun, 24 Feb 2019 10:23:18 +0100 Subject: [PATCH] mac80211: rt2x00: fix crash on release_firmware Fix crash due to passing invalid r2x00dev->eeprom_file pointer to release_firmware(). Since we copy eeprom data with EEPROM_SIZE in rt2800_read_eeprom() we can use eeprom_file->size as marker if the file was crated by request_firmware(). Acked-by: Kristian Evensen Signed-off-by: Stanislaw Gruszka --- .../patches/rt2x00/602-rt2x00-introduce-rt2x00eeprom.patch | 5 +++-- ...t2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch | 5 ++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/package/kernel/mac80211/patches/rt2x00/602-rt2x00-introduce-rt2x00eeprom.patch b/package/kernel/mac80211/patches/rt2x00/602-rt2x00-introduce-rt2x00eeprom.patch index ab31d8485d..c6d4862e41 100644 --- a/package/kernel/mac80211/patches/rt2x00/602-rt2x00-introduce-rt2x00eeprom.patch +++ b/package/kernel/mac80211/patches/rt2x00/602-rt2x00-introduce-rt2x00eeprom.patch @@ -152,7 +152,7 @@ --- /dev/null +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c -@@ -0,0 +1,105 @@ +@@ -0,0 +1,106 @@ +/* + Copyright (C) 2004 - 2009 Ivo van Doorn + Copyright (C) 2004 - 2009 Gertjan van Wingerde @@ -255,7 +255,8 @@ + +void rt2x00lib_free_eeprom_file(struct rt2x00_dev *rt2x00dev) +{ -+ release_firmware(rt2x00dev->eeprom_file); ++ if (rt2x00dev->eeprom_file && rt2x00dev->eeprom_file->size) ++ release_firmware(rt2x00dev->eeprom_file); + rt2x00dev->eeprom_file = NULL; +} --- a/drivers/net/wireless/ralink/rt2x00/rt2x00lib.h diff --git a/package/kernel/mac80211/patches/rt2x00/604-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch b/package/kernel/mac80211/patches/rt2x00/604-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch index a98b49c541..b3e1220b60 100644 --- a/package/kernel/mac80211/patches/rt2x00/604-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch +++ b/package/kernel/mac80211/patches/rt2x00/604-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch @@ -22,7 +22,7 @@ Signed-off-by: John Crispin Supported chips: RT2880, RT3050, RT3052, RT3350, RT3352. --- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c -@@ -26,11 +26,73 @@ +@@ -26,11 +26,72 @@ #include #include @@ -84,7 +84,6 @@ Signed-off-by: John Crispin + rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]); + + rt2x00dev->eeprom_file = &mtd_fw; -+ mtd_fw.size = len; + mtd_fw.data = (const u8 *) rt2x00dev->eeprom; + + dev_info(rt2x00dev->dev, "loaded eeprom from mtd device \"%s\"\n", part); @@ -96,7 +95,7 @@ Signed-off-by: John Crispin static const char * rt2x00lib_get_eeprom_file_name(struct rt2x00_dev *rt2x00dev) { -@@ -58,6 +120,9 @@ static int rt2x00lib_request_eeprom_file +@@ -58,6 +119,9 @@ static int rt2x00lib_request_eeprom_file const char *ee_name; int retval; -- 2.30.2