format string is not a string literal (potentially insecure) [-Wformat-security]

[Alexander Best]

hi there,

clang outputs the following warning during 'make buildkernel':

clang -c -O3 -pipe -fno-inline-functions -fno-strict-aliasing -march=core2 -std=c99  -fdiagnostics-show-option -fformat-extensions -Wall  -Wcast-qual -Winline -Wmissing-include-dirs  -Wmissing-prototypes -Wnested-externs -Wpointer-arith  -Wredundant-decls -Wstrict-prototypes -Wundef  -Wno-pointer-sign -nostdinc  -I. -I/usr/git-freebsd-head/sys -I/usr/git-freebsd-head/sys/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -mno-aes -mno-avx -mcmodel=kernel -mno-red-zone -mno-mmx -msoft-float  -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector-all   /usr/git-freebsd-head/sys/kern/kern_conf.c
/usr/git-freebsd-head/sys/kern/kern_conf.c:1019:45: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
                ret = make_dev_alias_p(flags, cdev, pdev, devfspath);
                                                          ^~~~~~~~~

does this indicate a security risk, which should be fixed or rather a bugus
warning?

cheers.
alex