diff options
| author | Coiby Xu <coxu@redhat.com> | 2025-05-02 09:12:37 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-05-21 10:48:20 -0700 |
| commit | 479e58549b0fa7e80f1e0b9e69e0a2a8e6711132 (patch) | |
| tree | 024bfec80c3d12a5cd11ac73503005d752d1ba31 /include/linux | |
| parent | 180cf31af7c313790f1e0fba1c7aa42512144dd5 (diff) | |
| download | linux-next-479e58549b0fa7e80f1e0b9e69e0a2a8e6711132.tar.gz linux-next-479e58549b0fa7e80f1e0b9e69e0a2a8e6711132.zip | |
crash_dump: store dm crypt keys in kdump reserved memory
When the kdump kernel image and initrd are loaded, the dm crypts keys will
be read from keyring and then stored in kdump reserved memory.
Assume a key won't exceed 256 bytes thus MAX_KEY_SIZE=256 according to
"cryptsetup benchmark".
Link: https://lkml.kernel.org/r/20250502011246.99238-4-coxu@redhat.com
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Jan Pazdziora <jpazdziora@redhat.com>
Cc: Liu Pingfan <kernelfans@gmail.com>
Cc: Milan Broz <gmazyland@gmail.com>
Cc: Ondrej Kozina <okozina@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/crash_core.h | 6 | ||||
| -rw-r--r-- | include/linux/kexec.h | 4 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h index 44305336314e..2e6782239034 100644 --- a/include/linux/crash_core.h +++ b/include/linux/crash_core.h @@ -34,7 +34,11 @@ static inline void arch_kexec_protect_crashkres(void) { } static inline void arch_kexec_unprotect_crashkres(void) { } #endif - +#ifdef CONFIG_CRASH_DM_CRYPT +int crash_load_dm_crypt_keys(struct kimage *image); +#else +static inline int crash_load_dm_crypt_keys(struct kimage *image) {return 0; } +#endif #ifndef arch_crash_handle_hotplug_event static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { } diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 1871eaa95432..6e688c5d8e4d 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -405,6 +405,10 @@ struct kimage { void *elf_headers; unsigned long elf_headers_sz; unsigned long elf_load_addr; + + /* dm crypt keys buffer */ + unsigned long dm_crypt_keys_addr; + unsigned long dm_crypt_keys_sz; }; /* kexec interface functions */ |