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authorLaura Abbott <labbott@redhat.com>2018-01-21 04:14:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-21 04:22:54 +0300
commit91cfc88c66bf8ab95937606569670cf67fa73e09 (patch)
treec9fe536ef27586f2936271c9109719a55a125c73 /arch/x86/mm/mem_encrypt.c
parent24b61240471ad4ed39740f1664d5240d91f4bf75 (diff)
downloadlinux-91cfc88c66bf8ab95937606569670cf67fa73e09.tar.xz
x86: Use __nostackprotect for sme_encrypt_kernel
Commit bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") moved some parameters into a structure. The structure was large enough to trigger the stack protection canary in sme_encrypt_kernel which doesn't work this early, causing reboots. Mark sme_encrypt_kernel appropriately to not use the canary. Fixes: bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") Signed-off-by: Laura Abbott <labbott@redhat.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/mm/mem_encrypt.c')
-rw-r--r--arch/x86/mm/mem_encrypt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 3ef362f598e3..e1d61e8500f9 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -738,7 +738,7 @@ static unsigned long __init sme_pgtable_calc(unsigned long len)
return total;
}
-void __init sme_encrypt_kernel(struct boot_params *bp)
+void __init __nostackprotector sme_encrypt_kernel(struct boot_params *bp)
{
unsigned long workarea_start, workarea_end, workarea_len;
unsigned long execute_start, execute_end, execute_len;