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| author | Kairui Song <kasong@redhat.com> | 2019-01-18 12:13:08 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-02-01 18:18:54 +0100 |
| commit | 2aa958c99c7fd3162b089a1a56a34a0cdb778de1 (patch) | |
| tree | 371eba9739218817e02bd68ac6daf0df7219c9a6 /include | |
| parent | x86/microcode/amd: Don't falsely trick the late loading mechanism (diff) | |
| download | linux-2aa958c99c7fd3162b089a1a56a34a0cdb778de1.tar.xz linux-2aa958c99c7fd3162b089a1a56a34a0cdb778de1.zip | |
x86/kexec: Don't setup EFI info if EFI runtime is not enabled
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
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions