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s390/vmcp: correct early_param handling

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Check "p" is not NULL before passing it to memparse, which doesn't
handle that case explicitly.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2019-08-19 10:44:54 +02:00
parent 915ef7bda7
commit a45425d8a5
1 changed files with 2 additions and 0 deletions
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drivers/s390/char/vmcp.c
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@ -43,6 +43,8 @@ static struct cma *vmcp_cma;
static int __init early_parse_vmcp_cma(char *p) static int __init early_parse_vmcp_cma(char *p)
{ {
if (!p)
return 1;
vmcp_cma_size = ALIGN(memparse(p, NULL), PAGE_SIZE); vmcp_cma_size = ALIGN(memparse(p, NULL), PAGE_SIZE);
return 0; return 0;
} }