diff options
| author | Vasily Gorbik | 2023-01-27 14:03:07 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-03-10 09:33:00 +0100 |
| commit | 9e1e58525d6c4197f41c76dd91d33fbb7139a1f8 (patch) | |
| tree | a2cc98cb85c9509b0347385b960b314f993e921b /arch/s390/boot | |
| parent | a0d91a48e1a020fb636f0fcaf44672f123bb0799 (diff) | |
s390/mem_detect: fix detect_memory() error handling
[ Upstream commit 3400c35a4090704e6c465449616ab7e67a9209e7 ]
Currently if for some reason sclp_early_read_info() fails,
sclp_early_get_memsize() will not set max_physmem_end and it
will stay uninitialized. Any garbage value other than 0 will lead
to detect_memory() taking wrong path or returning a garbage value
as max_physmem_end. To avoid that simply initialize max_physmem_end.
Fixes: 73045a08cf55 ("s390: unify identity mapping limits handling")
Reported-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/mem_detect.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/boot/mem_detect.c b/arch/s390/boot/mem_detect.c index 7fa1a32ea0f3..0a5821ef4f1f 100644 --- a/arch/s390/boot/mem_detect.c +++ b/arch/s390/boot/mem_detect.c @@ -165,7 +165,7 @@ static void search_mem_end(void) unsigned long detect_memory(void) { - unsigned long max_physmem_end; + unsigned long max_physmem_end = 0; sclp_early_get_memsize(&max_physmem_end); |