From b9e50d0cfd32274df6a057a59cb0695ae828fa2b Mon Sep 17 00:00:00 2001 From: Sumit Pundir Date: Fri, 10 Aug 2018 18:01:40 +0530 Subject: [PATCH] staging: mt7621-mmc: place a check for sscanf Placed a check for the return value of sscanf. -EINVAL is returned if the value is anything other than expected. Reported by checkpatch.pl Signed-off-by: Sumit Pundir Signed-off-by: Greg Kroah-Hartman --- drivers/staging/mt7621-mmc/dbg.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/staging/mt7621-mmc/dbg.c b/drivers/staging/mt7621-mmc/dbg.c index 6e518dce9029..4fe4d2fd111e 100644 --- a/drivers/staging/mt7621-mmc/dbg.c +++ b/drivers/staging/mt7621-mmc/dbg.c @@ -249,7 +249,9 @@ static ssize_t msdc_debug_proc_write(struct file *file, cmd_buf[count] = '\0'; pr_debug("msdc Write %s\n", cmd_buf); - sscanf(cmd_buf, "%x %x %x", &cmd, &p1, &p2); + ret = sscanf(cmd_buf, "%x %x %x", &cmd, &p1, &p2); + if (ret != 3) + return -EINVAL; if (cmd == SD_TOOL_ZONE) { id = p1;