From 3efe90af4c0c46c58dba1b306de142827153d9c0 Mon Sep 17 00:00:00 2001 From: Kai Ye Date: Sat, 22 Oct 2022 01:17:44 +0000 Subject: crypto: hisilicon/qm - increase the memory of local variables Increase the buffer to prevent stack overflow by fuzz test. The maximum length of the qos configuration buffer is 256 bytes. Currently, the value of the 'val buffer' is only 32 bytes. The sscanf does not check the dest memory length. So the 'val buffer' may stack overflow. Signed-off-by: Kai Ye Signed-off-by: Herbert Xu --- drivers/crypto/hisilicon/qm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/crypto') diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index e3edb176d976..5d79e9f0e7e1 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -250,7 +250,6 @@ #define QM_QOS_MIN_CIR_B 100 #define QM_QOS_MAX_CIR_U 6 #define QM_QOS_MAX_CIR_S 11 -#define QM_QOS_VAL_MAX_LEN 32 #define QM_DFX_BASE 0x0100000 #define QM_DFX_STATE1 0x0104000 #define QM_DFX_STATE2 0x01040C8 @@ -4612,7 +4611,7 @@ static ssize_t qm_get_qos_value(struct hisi_qm *qm, const char *buf, unsigned int *fun_index) { char tbuf_bdf[QM_DBG_READ_LEN] = {0}; - char val_buf[QM_QOS_VAL_MAX_LEN] = {0}; + char val_buf[QM_DBG_READ_LEN] = {0}; u32 tmp1, device, function; int ret, bus; -- cgit v1.2.3