From 86cde618e718d0d286a565bcabfce5bdfc304685 Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Fri, 25 Sep 2020 22:42:30 +0200 Subject: [PATCH] s390/startup: correct "dfltcc" option parsing Currently if just "dfltcc" is passed as a kernel command line option "val" going to be NULL, this leads to reading at address 0 in strcmp(val, "off") Fix that by making sure "val" is not NULL. This does not affect option handling logic. Reviewed-by: Sven Schnelle Signed-off-by: Vasily Gorbik --- arch/s390/boot/ipl_parm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 92ebc4a58fe2..1add096e09a6 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -230,7 +230,7 @@ void parse_boot_command_line(void) if (!strcmp(param, "vmalloc") && val) vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE); - if (!strcmp(param, "dfltcc")) { + if (!strcmp(param, "dfltcc") && val) { if (!strcmp(val, "off")) zlib_dfltcc_support = ZLIB_DFLTCC_DISABLED; else if (!strcmp(val, "on"))