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s390/startup: correct command line options parsing 

Check val is not NULL before accessing it. This might happen if
corresponding kernel command line options are used without specifying
values.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2019-08-19 10:49:53 +02:00
parent a45425d8a5
commit 227f52a43a
1 changed files with 3 additions and 3 deletions
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6
arch/s390/boot/ipl_parm.c
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@ -223,12 +223,12 @@ void parse_boot_command_line(void)
while (*args) {
args = next_arg(args, &param, &val);
if (!strcmp(param, "mem")) {
if (!strcmp(param, "mem") && val) {
memory_end = round_down(memparse(val, NULL), PAGE_SIZE);
memory_end_set = 1;
}
if (!strcmp(param, "vmalloc"))
if (!strcmp(param, "vmalloc") && val)
vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
if (!strcmp(param, "noexec")) {
@ -237,7 +237,7 @@ void parse_boot_command_line(void)
noexec_disabled = 1;
}
if (!strcmp(param, "facilities"))
if (!strcmp(param, "facilities") && val)
modify_fac_list(val);
if (!strcmp(param, "nokaslr"))