From 9585497208266a917513754f887d9db35efdcec7 Mon Sep 17 00:00:00 2001 From: Tomohiro Kusumi Date: Fri, 21 Jun 2019 10:31:53 +0900 Subject: [PATCH] Prevent pointer to an out-of-scope local variable `show_str` could be a pointer to a local variable in stack which is out-of-scope by the time `return (snprintf(buf, buflen, "%s\n", show_str));` is called. Reviewed-by: Tony Hutter Reviewed-by: Brian Behlendorf Signed-off-by: Tomohiro Kusumi Closes #8924 Closes #8940 --- module/zfs/zfs_sysfs.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/module/zfs/zfs_sysfs.c b/module/zfs/zfs_sysfs.c index 2f5bea9aa996..bb7f3b69a662 100644 --- a/module/zfs/zfs_sysfs.c +++ b/module/zfs/zfs_sysfs.c @@ -264,6 +264,7 @@ zprop_sysfs_show(const char *attr_name, const zprop_desc_t *property, char *buf, size_t buflen) { const char *show_str; + char number[32]; /* For dataset properties list the dataset types that apply */ if (strcmp(attr_name, "datasets") == 0 && @@ -291,8 +292,6 @@ zprop_sysfs_show(const char *attr_name, const zprop_desc_t *property, } else if (strcmp(attr_name, "values") == 0) { show_str = property->pd_values ? property->pd_values : ""; } else if (strcmp(attr_name, "default") == 0) { - char number[32]; - switch (property->pd_proptype) { case PROP_TYPE_NUMBER: (void) snprintf(number, sizeof (number), "%llu",