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Kairui Song b8c82bd0cc x86/kexec: Don't setup EFI info if EFI runtime is not enabled 
[ Upstream commit 2aa958c99c7fd3162b089a1a56a34a0cdb778de1 ]

Kexec-ing a kernel with "efi=noruntime" on the first kernel's command
line causes the following null pointer dereference:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
  #PF error: [normal kernel read fault]
  Call Trace:
   efi_runtime_map_copy+0x28/0x30
   bzImage64_load+0x688/0x872
   arch_kexec_kernel_image_load+0x6d/0x70
   kimage_file_alloc_init+0x13e/0x220
   __x64_sys_kexec_file_load+0x144/0x290
   do_syscall_64+0x55/0x1a0
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

Just skip the EFI info setup if EFI runtime services are not enabled.

 [ bp: Massage commit message. ]

Suggested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: bhe@redhat.com
Cc: David Howells <dhowells@redhat.com>
Cc: erik.schmauss@intel.com
Cc: fanc.fnst@cn.fujitsu.com
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: kexec@lists.infradead.org
Cc: lenb@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: Philipp Rudo <prudo@linux.vnet.ibm.com>
Cc: rafael.j.wysocki@intel.com
Cc: robert.moore@intel.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Cc: Yannik Sembritzki <yannik@sembritzki.me>
Link: https://lkml.kernel.org/r/20190118111310.29589-2-kasong@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-23 08:44:26 +01:00
..
alpha alpha: Fix Eiger NR_IRQS to 128 2019-02-20 10:13:22 +01:00
arc ARC: fix __ffs return value to avoid build warnings 2019-03-23 08:44:19 +01:00
arm KVM: arm/arm64: Fix MMIO emulation data handling 2019-03-23 08:44:20 +01:00
arm64 arm64: ftrace: don't adjust the LR value 2019-02-20 10:13:07 +01:00
avr32
blackfin
c6x
cris mm: replace get_user_pages() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
frv
h8300
hexagon hexagon: modify ffs() and fls() to return int 2018-10-10 08:52:12 +02:00
ia64 mm: replace get_user_pages() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
m32r
m68k m68k: fix "bad page state" oops on ColdFire boot 2018-08-24 13:26:57 +02:00
metag
microblaze microblaze: Fix simpleImage format generation 2018-08-06 16:24:39 +02:00
mips MIPS: irq: Allocate accurate order pages for irq stack 2019-03-23 08:44:23 +01:00
mn10300
nios2
openrisc kthread: fix boot hang (regression) on MIPS/OpenRISC 2018-09-19 22:48:55 +02:00
parisc parisc: Fix map_pages() to not overwrite existing pte entries 2018-11-21 09:27:30 +01:00
powerpc powerpc: Always initialize input array when calling epapr_hypercall() 2019-03-23 08:44:21 +01:00
s390 s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU 2019-02-06 19:43:05 +01:00
score
sh mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
sparc mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
tile
um um: Avoid marking pages with "changed protection" 2019-02-20 10:13:13 +01:00
unicore32
x86 x86/kexec: Don't setup EFI info if EFI runtime is not enabled 2019-03-23 08:44:26 +01:00
xtensa xtensa: SMP: limit number of possible CPUs by NR_CPUS 2019-03-23 08:44:25 +01:00
.gitignore
Kconfig