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| author | James Morse <james.morse@arm.com> | 2018-12-07 10:14:39 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-12-07 15:28:21 +0000 |
| commit | 394135c1ff13ec9b5a38a36bbdb5811f2f595e94 (patch) | |
| tree | 3a3a69c393629644c6d71e45285d4f231a4fdc81 /arch/arm64/kernel | |
| parent | 121ca8e56551e4c52fdb37e8771eddc9ef44c880 (diff) | |
| download | linux-0-day-394135c1ff13ec9b5a38a36bbdb5811f2f595e94.tar.gz linux-0-day-394135c1ff13ec9b5a38a36bbdb5811f2f595e94.tar.xz | |
arm64: kexec_file: forbid kdump via kexec_file_load()
Now that kexec_walk_memblock() can do the crash-kernel placement itself
architectures that don't support kdump via kexe_file_load() need to
explicitly forbid it.
We don't support this on arm64 until the kernel can add the elfcorehdr
and usable-memory-range fields to the DT. Without these the crash-kernel
overwrites the previous kernel's memory during startup.
Add a check to refuse crash image loading.
Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/kexec_image.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 1ad1d5f8f024e..07bf740bea914 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -47,6 +47,10 @@ static void *image_load(struct kimage *image, struct kexec_segment *kernel_segment; int ret; + /* We don't support crash kernels yet. */ + if (image->type == KEXEC_TYPE_CRASH) + return ERR_PTR(-EOPNOTSUPP); + /* * We require a kernel with an unambiguous Image header. Per * Documentation/booting.txt, this is the case when image_size |