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615d0014bf
[ Upstream commit 81a34892c2c7c809f9c4e22c5ac936ae673fb9a2 ] The load address is compared with LOAD_PHYSICAL_ADDR using a signed comparison currently (using jge instruction). When loading a 64-bit kernel using the new efi32_pe_entry() point added by: 97aa276579b2 ("efi/x86: Add true mixed mode entry point into .compat section") using Qemu with -m 3072, the firmware actually loads us above 2Gb, resulting in a very early crash. Use the JAE instruction to perform a unsigned comparison instead, as physical addresses should be considered unsigned. Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200301230436.2246909-6-nivedita@alum.mit.edu Link: https://lore.kernel.org/r/20200308080859.21568-14-ardb@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org> |
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.. | ||
.gitignore | ||
cmdline.c | ||
cpuflags.c | ||
early_serial_console.c | ||
eboot.c | ||
eboot.h | ||
efi_stub_32.S | ||
efi_stub_64.S | ||
efi_thunk_64.S | ||
error.c | ||
error.h | ||
head_32.S | ||
head_64.S | ||
kaslr_64.c | ||
kaslr.c | ||
Makefile | ||
mem_encrypt.S | ||
misc.c | ||
misc.h | ||
mkpiggy.c | ||
pgtable_64.c | ||
pgtable.h | ||
string.c | ||
vmlinux.lds.S |