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diff -up smartmontools-7.2/os_linux.cpp.permsfix smartmontools-7.2/os_linux.cpp
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--- smartmontools-7.2/os_linux.cpp.permsfix	2021-11-02 22:08:51.956425716 +0100
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+++ smartmontools-7.2/os_linux.cpp	2021-11-02 22:09:55.928583584 +0100
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@@ -1022,7 +1022,7 @@ bool linux_aacraid_device::open()
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       return set_err(ENOENT, "aac entry not found in /proc/devices");
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     //Create misc device file in /dev/ used for communication with driver
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-    if(mknod(dev_name,S_IFCHR,makedev(mjr,aHost)))
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+    if(mknod(dev_name,S_IFCHR|0600,makedev(mjr,aHost)))
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       return set_err(errno,"cannot create %s:%s",dev_name,strerror(errno));
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     afd = ::open(dev_name,O_RDWR);
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@@ -1298,14 +1298,14 @@ bool linux_megaraid_device::open()
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     while (fgets(line, sizeof(line), fp) != NULL) {
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       int n1 = 0;
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       if (sscanf(line, "%d megaraid_sas_ioctl%n", &mjr, &n1) == 1 && n1 == 22) {
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-        n1=mknod("/dev/megaraid_sas_ioctl_node", S_IFCHR, makedev(mjr, 0));
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+        n1=mknod("/dev/megaraid_sas_ioctl_node", S_IFCHR|0600, makedev(mjr, 0));
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         if(report > 0)
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           pout("Creating /dev/megaraid_sas_ioctl_node = %d\n", n1 >= 0 ? 0 : errno);
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         if (n1 >= 0 || errno == EEXIST)
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           break;
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       }
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       else if (sscanf(line, "%d megadev%n", &mjr, &n1) == 1 && n1 == 11) {
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-        n1=mknod("/dev/megadev0", S_IFCHR, makedev(mjr, 0));
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+        n1=mknod("/dev/megadev0", S_IFCHR|0600, makedev(mjr, 0));
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         if(report > 0)
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           pout("Creating /dev/megadev0 = %d\n", n1 >= 0 ? 0 : errno);
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         if (n1 >= 0 || errno == EEXIST)
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@@ -2970,7 +2970,7 @@ bool linux_smart_interface::get_dev_mega
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     n1=0;
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     if (sscanf(line, "%d megaraid_sas_ioctl%n", &mjr, &n1) == 1 && n1 == 22) {
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       scan_megasas = true;
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-      n1=mknod("/dev/megaraid_sas_ioctl_node", S_IFCHR, makedev(mjr, 0));
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+      n1=mknod("/dev/megaraid_sas_ioctl_node", S_IFCHR|0600, makedev(mjr, 0));
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       if(scsi_debugmode > 0)
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         pout("Creating /dev/megaraid_sas_ioctl_node = %d\n", n1 >= 0 ? 0 : errno);
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       if (n1 >= 0 || errno == EEXIST)