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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2019-02-19 10:52:24 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-02-28 12:25:05 +0100
commit6f913de3231e1d70a871135b38219da7810df218 (patch)
tree168cbbfce6d40d4912a3ae86689b036d1914c7a8 /net
parentf9d230e893e864f13ce5ded9a49990fd024bfed5 (diff)
downloadlinux-6f913de3231e1d70a871135b38219da7810df218.tar.bz2
x86/boot/compressed/64: Do not read legacy ROM on EFI system
EFI systems do not necessarily provide a legacy ROM. If the ROM is missing the memory is not mapped at all. Trying to dereference values in the legacy ROM area leads to a crash on Macbook Pro. Only look for values in the legacy ROM area for non-EFI system. Fixes: 3548e131ec6a ("x86/boot/compressed/64: Find a place for 32-bit trampoline") Reported-by: Pitam Mitra <pitamm@gmail.com> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Bockjoo Kim <bockjoo@phys.ufl.edu> Cc: bp@alien8.de Cc: hpa@zytor.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190219075224.35058-1-kirill.shutemov@linux.intel.com Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202351
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