From 345ebae7d0586d2f945b622f67f4027515ec4d40 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 14 Jul 2017 14:06:59 +0200 Subject: [PATCH] scsi: gdth: increase the procfs event buffer size We print a 256 byte event string into a buffer that is only 161 bytes long, this is clearly wrong: drivers/scsi/gdth_proc.c: In function 'gdth_show_info': drivers/scsi/gdth.c:3660:41: error: '%s' directive writing up to 255 bytes into a region of size between 141 and 150 [-Werror=format-overflow=] sprintf(buffer,"Adapter %d: %s\n", ^~ /git/arm-soc/drivers/scsi/gdth.c:3660:13: note: 'sprintf' output between 13 and 277 bytes into a destination of size 161 sprintf(buffer,"Adapter %d: %s\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ dvr->eu.async.ionode,dvr->event_string); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ gcc calculates that the worst case buffer size would be 277 bytes, so we can use that. Signed-off-by: Arnd Bergmann Signed-off-by: Martin K. Petersen --- drivers/scsi/gdth_proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/gdth_proc.c b/drivers/scsi/gdth_proc.c index be609db66807..d08b2716752c 100644 --- a/drivers/scsi/gdth_proc.c +++ b/drivers/scsi/gdth_proc.c @@ -147,7 +147,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host) gdth_cmd_str *gdtcmd; gdth_evt_str *estr; - char hrec[161]; + char hrec[277]; char *buf; gdth_dskstat_str *pds; -- 2.20.1