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authorVasily Gorbik <gor@linux.ibm.com>2019-08-19 11:49:53 +0300
committerVasily Gorbik <gor@linux.ibm.com>2019-08-26 13:51:17 +0300
commit227f52a43a2fa0bb50f07faa2d5e31530a740499 (patch)
tree9afdf5627f84c11f17e5d900de4287ce2e45ada1 /arch/s390/boot/ipl_parm.c
parenta45425d8a5a672d3322164cfce10b7b6fb32fcc2 (diff)
downloadlinux-227f52a43a2fa0bb50f07faa2d5e31530a740499.tar.xz
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>
Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
-rw-r--r--arch/s390/boot/ipl_parm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index 4a052a844f9b..80b8d8712f08 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -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"))