/usr/src/linux-headers-3.13.0-157/drivers/char/ is in linux-headers-3.13.0-157 3.13.0-157.207.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-headers-3.13.0-157/drivers/char/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/agp/
/usr/src/linux-headers-3.13.0-157/drivers/char/agp/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/agp/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/hw_random/
/usr/src/linux-headers-3.13.0-157/drivers/char/hw_random/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/hw_random/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/ipmi/
/usr/src/linux-headers-3.13.0-157/drivers/char/ipmi/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/ipmi/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/mwave/
/usr/src/linux-headers-3.13.0-157/drivers/char/mwave/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/pcmcia/
/usr/src/linux-headers-3.13.0-157/drivers/char/pcmcia/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/pcmcia/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/tpm/
/usr/src/linux-headers-3.13.0-157/drivers/char/tpm/Kconfig
/usr/src/linux-headers-3.13.0-157/drivers/char/tpm/Makefile
/usr/src/linux-headers-3.13.0-157/drivers/char/xilinx_hwicap/
/usr/src/linux-headers-3.13.0-157/drivers/char/xilinx_hwicap/Makefile