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commit ee1809ed7bc456a72dc8410b475b73021a3a68d5 upstream. fw_getenv will use env entry to determine style of env, however it is legal for firmware to just pass a empty list. Check if first entry exist before running strchr to avoid null pointer dereference. Cc: stable@vger.kernel.org Link: https://github.com/clbr/n64bootloader/issues/5 Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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