* [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic [not found] <20220512023402.9913-1-coxu@redhat.com> @ 2022-05-12 2:34 ` Coiby Xu 2022-05-12 2:46 ` Baoquan He 2022-05-12 2:34 ` [PATCH v7 3/4] arm64: kexec_file: use more system keyrings to verify kernel image signature Coiby Xu 2022-05-12 2:34 ` [PATCH v7 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Coiby Xu 2 siblings, 1 reply; 8+ messages in thread From: Coiby Xu @ 2022-05-12 2:34 UTC (permalink / raw) To: kexec Cc: linux-arm-kernel, Michal Suchanek, Baoquan He, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) commit 278311e417be ("kexec, KEYS: Make use of platform keyring for signature verify") adds platform keyring support on x86 kexec but not arm64. The code in bzImage64_verify_sig makes use of system keyrings including .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to verify signed kernel image as PE file. Make it generic so both x86_64 and arm64 can use it. Note this patch is needed by a later patch so Cc it to the stable tree as well. Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig Reviewed-by: Michal Suchanek <msuchanek@suse.de> Signed-off-by: Coiby Xu <coxu@redhat.com> --- arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- include/linux/kexec.h | 7 +++++++ kernel/kexec_file.c | 17 +++++++++++++++++ 3 files changed, 25 insertions(+), 19 deletions(-) diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 170d0fd68b1f..f299b48f9c9f 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -17,7 +17,6 @@ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/efi.h> -#include <linux/verification.h> #include <asm/bootparam.h> #include <asm/setup.h> @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) return 0; } -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) -{ - int ret; - - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_SECONDARY_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - } - return ret; -} -#endif - const struct kexec_file_ops kexec_bzImage64_ops = { .probe = bzImage64_probe, .load = bzImage64_load, .cleanup = bzImage64_cleanup, #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG - .verify_sig = bzImage64_verify_sig, + .verify_sig = kexec_kernel_verify_pe_sig, #endif }; diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 413235c6c797..da83abfc628b 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -19,6 +19,7 @@ #include <asm/io.h> #include <uapi/linux/kexec.h> +#include <linux/verification.h> /* Location of a reserved region to hold the crash kernel. */ @@ -202,6 +203,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, const Elf_Shdr *relsec, const Elf_Shdr *symtab); int arch_kimage_file_post_load_cleanup(struct kimage *image); +#ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, + unsigned long kernel_len); +#endif +#endif int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); extern int kexec_add_buffer(struct kexec_buf *kbuf); diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 3720435807eb..754885b96aab 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) } #ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) +{ + int ret; + + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + } + return ret; +} +#endif + static int kexec_image_verify_sig(struct kimage *image, void *buf, unsigned long buf_len) { -- 2.35.3 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic 2022-05-12 2:34 ` [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic Coiby Xu @ 2022-05-12 2:46 ` Baoquan He 2022-05-12 3:52 ` Baoquan He 0 siblings, 1 reply; 8+ messages in thread From: Baoquan He @ 2022-05-12 2:46 UTC (permalink / raw) To: Coiby Xu Cc: kexec, linux-arm-kernel, Michal Suchanek, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) On 05/12/22 at 10:34am, Coiby Xu wrote: > commit 278311e417be ("kexec, KEYS: Make use of platform keyring for > signature verify") adds platform keyring support on x86 kexec but not > arm64. > > The code in bzImage64_verify_sig makes use of system keyrings including > .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to > verify signed kernel image as PE file. Make it generic so both x86_64 > and arm64 can use it. > > Note this patch is needed by a later patch so Cc it to the stable tree > as well. This note should not be added in log. > > Cc: kexec@lists.infradead.org > Cc: keyrings@vger.kernel.org > Cc: linux-security-module@vger.kernel.org > Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig > Reviewed-by: Michal Suchanek <msuchanek@suse.de> > Signed-off-by: Coiby Xu <coxu@redhat.com> > --- You can put the note here, it won't be added to commit log when merged. Maybe it can be removed when merged. Otherwise, LGTM Acked-by: Baoquan He <bhe@redhat.com> > arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- > include/linux/kexec.h | 7 +++++++ > kernel/kexec_file.c | 17 +++++++++++++++++ > 3 files changed, 25 insertions(+), 19 deletions(-) > > diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c > index 170d0fd68b1f..f299b48f9c9f 100644 > --- a/arch/x86/kernel/kexec-bzimage64.c > +++ b/arch/x86/kernel/kexec-bzimage64.c > @@ -17,7 +17,6 @@ > #include <linux/kernel.h> > #include <linux/mm.h> > #include <linux/efi.h> > -#include <linux/verification.h> > > #include <asm/bootparam.h> > #include <asm/setup.h> > @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) > return 0; > } > > -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) > -{ > - int ret; > - > - ret = verify_pefile_signature(kernel, kernel_len, > - VERIFY_USE_SECONDARY_KEYRING, > - VERIFYING_KEXEC_PE_SIGNATURE); > - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > - ret = verify_pefile_signature(kernel, kernel_len, > - VERIFY_USE_PLATFORM_KEYRING, > - VERIFYING_KEXEC_PE_SIGNATURE); > - } > - return ret; > -} > -#endif > - > const struct kexec_file_ops kexec_bzImage64_ops = { > .probe = bzImage64_probe, > .load = bzImage64_load, > .cleanup = bzImage64_cleanup, > #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > - .verify_sig = bzImage64_verify_sig, > + .verify_sig = kexec_kernel_verify_pe_sig, > #endif > }; > diff --git a/include/linux/kexec.h b/include/linux/kexec.h > index 413235c6c797..da83abfc628b 100644 > --- a/include/linux/kexec.h > +++ b/include/linux/kexec.h > @@ -19,6 +19,7 @@ > #include <asm/io.h> > > #include <uapi/linux/kexec.h> > +#include <linux/verification.h> > > /* Location of a reserved region to hold the crash kernel. > */ > @@ -202,6 +203,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, > const Elf_Shdr *relsec, > const Elf_Shdr *symtab); > int arch_kimage_file_post_load_cleanup(struct kimage *image); > +#ifdef CONFIG_KEXEC_SIG > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > +int kexec_kernel_verify_pe_sig(const char *kernel, > + unsigned long kernel_len); > +#endif > +#endif > int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); > > extern int kexec_add_buffer(struct kexec_buf *kbuf); > diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c > index 3720435807eb..754885b96aab 100644 > --- a/kernel/kexec_file.c > +++ b/kernel/kexec_file.c > @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) > } > > #ifdef CONFIG_KEXEC_SIG > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) > +{ > + int ret; > + > + ret = verify_pefile_signature(kernel, kernel_len, > + VERIFY_USE_SECONDARY_KEYRING, > + VERIFYING_KEXEC_PE_SIGNATURE); > + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > + ret = verify_pefile_signature(kernel, kernel_len, > + VERIFY_USE_PLATFORM_KEYRING, > + VERIFYING_KEXEC_PE_SIGNATURE); > + } > + return ret; > +} > +#endif > + > static int kexec_image_verify_sig(struct kimage *image, void *buf, > unsigned long buf_len) > { > -- > 2.35.3 > ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic 2022-05-12 2:46 ` Baoquan He @ 2022-05-12 3:52 ` Baoquan He 2022-05-12 4:33 ` Coiby Xu 0 siblings, 1 reply; 8+ messages in thread From: Baoquan He @ 2022-05-12 3:52 UTC (permalink / raw) To: Coiby Xu Cc: kexec, linux-arm-kernel, Michal Suchanek, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) On 05/12/22 at 10:46am, Baoquan He wrote: > On 05/12/22 at 10:34am, Coiby Xu wrote: > > commit 278311e417be ("kexec, KEYS: Make use of platform keyring for > > signature verify") adds platform keyring support on x86 kexec but not > > arm64. > > > > The code in bzImage64_verify_sig makes use of system keyrings including > > .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to > > verify signed kernel image as PE file. Make it generic so both x86_64 > > and arm64 can use it. > > > > Note this patch is needed by a later patch so Cc it to the stable tree > > as well. > > This note should not be added in log. > > > > > Cc: kexec@lists.infradead.org > > Cc: keyrings@vger.kernel.org > > Cc: linux-security-module@vger.kernel.org > > Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig Hold on, should we CC stable when it's not fixing an issue? Hi Coiby, Just to make clear , is this patch fixing an issue, or it's just an preparation for later patch's use? Or I should ask in another way, any problem is solved with this patch? > > Reviewed-by: Michal Suchanek <msuchanek@suse.de> > > Signed-off-by: Coiby Xu <coxu@redhat.com> > > --- > > You can put the note here, it won't be added to commit log when merged. > Maybe it can be removed when merged. > > Otherwise, LGTM > > Acked-by: Baoquan He <bhe@redhat.com> > > > arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- > > include/linux/kexec.h | 7 +++++++ > > kernel/kexec_file.c | 17 +++++++++++++++++ > > 3 files changed, 25 insertions(+), 19 deletions(-) > > > > diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c > > index 170d0fd68b1f..f299b48f9c9f 100644 > > --- a/arch/x86/kernel/kexec-bzimage64.c > > +++ b/arch/x86/kernel/kexec-bzimage64.c > > @@ -17,7 +17,6 @@ > > #include <linux/kernel.h> > > #include <linux/mm.h> > > #include <linux/efi.h> > > -#include <linux/verification.h> > > > > #include <asm/bootparam.h> > > #include <asm/setup.h> > > @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) > > return 0; > > } > > > > -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > > -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) > > -{ > > - int ret; > > - > > - ret = verify_pefile_signature(kernel, kernel_len, > > - VERIFY_USE_SECONDARY_KEYRING, > > - VERIFYING_KEXEC_PE_SIGNATURE); > > - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > > - ret = verify_pefile_signature(kernel, kernel_len, > > - VERIFY_USE_PLATFORM_KEYRING, > > - VERIFYING_KEXEC_PE_SIGNATURE); > > - } > > - return ret; > > -} > > -#endif > > - > > const struct kexec_file_ops kexec_bzImage64_ops = { > > .probe = bzImage64_probe, > > .load = bzImage64_load, > > .cleanup = bzImage64_cleanup, > > #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > > - .verify_sig = bzImage64_verify_sig, > > + .verify_sig = kexec_kernel_verify_pe_sig, > > #endif > > }; > > diff --git a/include/linux/kexec.h b/include/linux/kexec.h > > index 413235c6c797..da83abfc628b 100644 > > --- a/include/linux/kexec.h > > +++ b/include/linux/kexec.h > > @@ -19,6 +19,7 @@ > > #include <asm/io.h> > > > > #include <uapi/linux/kexec.h> > > +#include <linux/verification.h> > > > > /* Location of a reserved region to hold the crash kernel. > > */ > > @@ -202,6 +203,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, > > const Elf_Shdr *relsec, > > const Elf_Shdr *symtab); > > int arch_kimage_file_post_load_cleanup(struct kimage *image); > > +#ifdef CONFIG_KEXEC_SIG > > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > > +int kexec_kernel_verify_pe_sig(const char *kernel, > > + unsigned long kernel_len); > > +#endif > > +#endif > > int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); > > > > extern int kexec_add_buffer(struct kexec_buf *kbuf); > > diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c > > index 3720435807eb..754885b96aab 100644 > > --- a/kernel/kexec_file.c > > +++ b/kernel/kexec_file.c > > @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) > > } > > > > #ifdef CONFIG_KEXEC_SIG > > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > > +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) > > +{ > > + int ret; > > + > > + ret = verify_pefile_signature(kernel, kernel_len, > > + VERIFY_USE_SECONDARY_KEYRING, > > + VERIFYING_KEXEC_PE_SIGNATURE); > > + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > > + ret = verify_pefile_signature(kernel, kernel_len, > > + VERIFY_USE_PLATFORM_KEYRING, > > + VERIFYING_KEXEC_PE_SIGNATURE); > > + } > > + return ret; > > +} > > +#endif > > + > > static int kexec_image_verify_sig(struct kimage *image, void *buf, > > unsigned long buf_len) > > { > > -- > > 2.35.3 > > > ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic 2022-05-12 3:52 ` Baoquan He @ 2022-05-12 4:33 ` Coiby Xu 2022-05-12 6:22 ` Baoquan He 0 siblings, 1 reply; 8+ messages in thread From: Coiby Xu @ 2022-05-12 4:33 UTC (permalink / raw) To: Baoquan He Cc: kexec, linux-arm-kernel, Michal Suchanek, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) On Thu, May 12, 2022 at 11:52:09AM +0800, Baoquan He wrote: >On 05/12/22 at 10:46am, Baoquan He wrote: >> On 05/12/22 at 10:34am, Coiby Xu wrote: >> > commit 278311e417be ("kexec, KEYS: Make use of platform keyring for >> > signature verify") adds platform keyring support on x86 kexec but not >> > arm64. >> > >> > The code in bzImage64_verify_sig makes use of system keyrings including >> > .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to >> > verify signed kernel image as PE file. Make it generic so both x86_64 >> > and arm64 can use it. >> > >> > Note this patch is needed by a later patch so Cc it to the stable tree >> > as well. >> >> This note should not be added in log. >> >> > >> > Cc: kexec@lists.infradead.org >> > Cc: keyrings@vger.kernel.org >> > Cc: linux-security-module@vger.kernel.org >> > Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig > >Hold on, should we CC stable when it's not fixing an issue? > >Hi Coiby, Hi Baoquan, > >Just to make clear , is this patch fixing an issue, or it's just an >preparation for later patch's use? > >Or I should ask in another way, any problem is solved with this patch? At least it doesn't fix an issue that satisfy the criteria listed in https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html > > >> > Reviewed-by: Michal Suchanek <msuchanek@suse.de> >> > Signed-off-by: Coiby Xu <coxu@redhat.com> >> > --- >> >> You can put the note here, it won't be added to commit log when merged. >> Maybe it can be removed when merged. Thanks for the suggestion! Shall I send a version to fix this problem or can I just bother the maintainer to remove it? >> >> Otherwise, LGTM >> >> Acked-by: Baoquan He <bhe@redhat.com> >> >> > arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- >> > include/linux/kexec.h | 7 +++++++ >> > kernel/kexec_file.c | 17 +++++++++++++++++ >> > 3 files changed, 25 insertions(+), 19 deletions(-) >> > >> > diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c >> > index 170d0fd68b1f..f299b48f9c9f 100644 >> > --- a/arch/x86/kernel/kexec-bzimage64.c >> > +++ b/arch/x86/kernel/kexec-bzimage64.c >> > @@ -17,7 +17,6 @@ >> > #include <linux/kernel.h> >> > #include <linux/mm.h> >> > #include <linux/efi.h> >> > -#include <linux/verification.h> >> > >> > #include <asm/bootparam.h> >> > #include <asm/setup.h> >> > @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) >> > return 0; >> > } >> > >> > -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG >> > -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) >> > -{ >> > - int ret; >> > - >> > - ret = verify_pefile_signature(kernel, kernel_len, >> > - VERIFY_USE_SECONDARY_KEYRING, >> > - VERIFYING_KEXEC_PE_SIGNATURE); >> > - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { >> > - ret = verify_pefile_signature(kernel, kernel_len, >> > - VERIFY_USE_PLATFORM_KEYRING, >> > - VERIFYING_KEXEC_PE_SIGNATURE); >> > - } >> > - return ret; >> > -} >> > -#endif >> > - >> > const struct kexec_file_ops kexec_bzImage64_ops = { >> > .probe = bzImage64_probe, >> > .load = bzImage64_load, >> > .cleanup = bzImage64_cleanup, >> > #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG >> > - .verify_sig = bzImage64_verify_sig, >> > + .verify_sig = kexec_kernel_verify_pe_sig, >> > #endif >> > }; >> > diff --git a/include/linux/kexec.h b/include/linux/kexec.h >> > index 413235c6c797..da83abfc628b 100644 >> > --- a/include/linux/kexec.h >> > +++ b/include/linux/kexec.h >> > @@ -19,6 +19,7 @@ >> > #include <asm/io.h> >> > >> > #include <uapi/linux/kexec.h> >> > +#include <linux/verification.h> >> > >> > /* Location of a reserved region to hold the crash kernel. >> > */ >> > @@ -202,6 +203,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, >> > const Elf_Shdr *relsec, >> > const Elf_Shdr *symtab); >> > int arch_kimage_file_post_load_cleanup(struct kimage *image); >> > +#ifdef CONFIG_KEXEC_SIG >> > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION >> > +int kexec_kernel_verify_pe_sig(const char *kernel, >> > + unsigned long kernel_len); >> > +#endif >> > +#endif >> > int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); >> > >> > extern int kexec_add_buffer(struct kexec_buf *kbuf); >> > diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c >> > index 3720435807eb..754885b96aab 100644 >> > --- a/kernel/kexec_file.c >> > +++ b/kernel/kexec_file.c >> > @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) >> > } >> > >> > #ifdef CONFIG_KEXEC_SIG >> > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION >> > +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) >> > +{ >> > + int ret; >> > + >> > + ret = verify_pefile_signature(kernel, kernel_len, >> > + VERIFY_USE_SECONDARY_KEYRING, >> > + VERIFYING_KEXEC_PE_SIGNATURE); >> > + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { >> > + ret = verify_pefile_signature(kernel, kernel_len, >> > + VERIFY_USE_PLATFORM_KEYRING, >> > + VERIFYING_KEXEC_PE_SIGNATURE); >> > + } >> > + return ret; >> > +} >> > +#endif >> > + >> > static int kexec_image_verify_sig(struct kimage *image, void *buf, >> > unsigned long buf_len) >> > { >> > -- >> > 2.35.3 >> > >> > -- Best regards, Coiby ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic 2022-05-12 4:33 ` Coiby Xu @ 2022-05-12 6:22 ` Baoquan He 2022-05-12 6:54 ` Coiby Xu 0 siblings, 1 reply; 8+ messages in thread From: Baoquan He @ 2022-05-12 6:22 UTC (permalink / raw) To: Coiby Xu Cc: kexec, linux-arm-kernel, Michal Suchanek, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) On 05/12/22 at 12:33pm, Coiby Xu wrote: > On Thu, May 12, 2022 at 11:52:09AM +0800, Baoquan He wrote: > > On 05/12/22 at 10:46am, Baoquan He wrote: > > > On 05/12/22 at 10:34am, Coiby Xu wrote: > > > > commit 278311e417be ("kexec, KEYS: Make use of platform keyring for > > > > signature verify") adds platform keyring support on x86 kexec but not > > > > arm64. > > > > > > > > The code in bzImage64_verify_sig makes use of system keyrings including > > > > .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to > > > > verify signed kernel image as PE file. Make it generic so both x86_64 > > > > and arm64 can use it. > > > > > > > > Note this patch is needed by a later patch so Cc it to the stable tree > > > > as well. > > > > > > This note should not be added in log. > > > > > > > > > > > Cc: kexec@lists.infradead.org > > > > Cc: keyrings@vger.kernel.org > > > > Cc: linux-security-module@vger.kernel.org > > > > Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig > > > > Hold on, should we CC stable when it's not fixing an issue? > > > > Hi Coiby, > > Hi Baoquan, > > > > > Just to make clear , is this patch fixing an issue, or it's just an > > preparation for later patch's use? > > > > Or I should ask in another way, any problem is solved with this patch? > > At least it doesn't fix an issue that satisfy the criteria listed in > https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html Then it should not be CC-ed to stable. > > > > > > > > > Reviewed-by: Michal Suchanek <msuchanek@suse.de> > > > > Signed-off-by: Coiby Xu <coxu@redhat.com> > > > > --- > > > > > > You can put the note here, it won't be added to commit log when merged. > > > Maybe it can be removed when merged. > > Thanks for the suggestion! Shall I send a version to fix this problem or > can I just bother the maintainer to remove it? Better send a clean one, it will save maintainer's time, they can pick it directly. > > > > > > > > Otherwise, LGTM > > > > > > Acked-by: Baoquan He <bhe@redhat.com> > > > > > > > arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- > > > > include/linux/kexec.h | 7 +++++++ > > > > kernel/kexec_file.c | 17 +++++++++++++++++ > > > > 3 files changed, 25 insertions(+), 19 deletions(-) > > > > > > > > diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c > > > > index 170d0fd68b1f..f299b48f9c9f 100644 > > > > --- a/arch/x86/kernel/kexec-bzimage64.c > > > > +++ b/arch/x86/kernel/kexec-bzimage64.c > > > > @@ -17,7 +17,6 @@ > > > > #include <linux/kernel.h> > > > > #include <linux/mm.h> > > > > #include <linux/efi.h> > > > > -#include <linux/verification.h> > > > > > > > > #include <asm/bootparam.h> > > > > #include <asm/setup.h> > > > > @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) > > > > return 0; > > > > } > > > > > > > > -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > > > > -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) > > > > -{ > > > > - int ret; > > > > - > > > > - ret = verify_pefile_signature(kernel, kernel_len, > > > > - VERIFY_USE_SECONDARY_KEYRING, > > > > - VERIFYING_KEXEC_PE_SIGNATURE); > > > > - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > > > > - ret = verify_pefile_signature(kernel, kernel_len, > > > > - VERIFY_USE_PLATFORM_KEYRING, > > > > - VERIFYING_KEXEC_PE_SIGNATURE); > > > > - } > > > > - return ret; > > > > -} > > > > -#endif > > > > - > > > > const struct kexec_file_ops kexec_bzImage64_ops = { > > > > .probe = bzImage64_probe, > > > > .load = bzImage64_load, > > > > .cleanup = bzImage64_cleanup, > > > > #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG > > > > - .verify_sig = bzImage64_verify_sig, > > > > + .verify_sig = kexec_kernel_verify_pe_sig, > > > > #endif > > > > }; > > > > diff --git a/include/linux/kexec.h b/include/linux/kexec.h > > > > index 413235c6c797..da83abfc628b 100644 > > > > --- a/include/linux/kexec.h > > > > +++ b/include/linux/kexec.h > > > > @@ -19,6 +19,7 @@ > > > > #include <asm/io.h> > > > > > > > > #include <uapi/linux/kexec.h> > > > > +#include <linux/verification.h> > > > > > > > > /* Location of a reserved region to hold the crash kernel. > > > > */ > > > > @@ -202,6 +203,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, > > > > const Elf_Shdr *relsec, > > > > const Elf_Shdr *symtab); > > > > int arch_kimage_file_post_load_cleanup(struct kimage *image); > > > > +#ifdef CONFIG_KEXEC_SIG > > > > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > > > > +int kexec_kernel_verify_pe_sig(const char *kernel, > > > > + unsigned long kernel_len); > > > > +#endif > > > > +#endif > > > > int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); > > > > > > > > extern int kexec_add_buffer(struct kexec_buf *kbuf); > > > > diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c > > > > index 3720435807eb..754885b96aab 100644 > > > > --- a/kernel/kexec_file.c > > > > +++ b/kernel/kexec_file.c > > > > @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) > > > > } > > > > > > > > #ifdef CONFIG_KEXEC_SIG > > > > +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION > > > > +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) > > > > +{ > > > > + int ret; > > > > + > > > > + ret = verify_pefile_signature(kernel, kernel_len, > > > > + VERIFY_USE_SECONDARY_KEYRING, > > > > + VERIFYING_KEXEC_PE_SIGNATURE); > > > > + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { > > > > + ret = verify_pefile_signature(kernel, kernel_len, > > > > + VERIFY_USE_PLATFORM_KEYRING, > > > > + VERIFYING_KEXEC_PE_SIGNATURE); > > > > + } > > > > + return ret; > > > > +} > > > > +#endif > > > > + > > > > static int kexec_image_verify_sig(struct kimage *image, void *buf, > > > > unsigned long buf_len) > > > > { > > > > -- > > > > 2.35.3 > > > > > > > > > > > -- > Best regards, > Coiby > ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic 2022-05-12 6:22 ` Baoquan He @ 2022-05-12 6:54 ` Coiby Xu 0 siblings, 0 replies; 8+ messages in thread From: Coiby Xu @ 2022-05-12 6:54 UTC (permalink / raw) To: Baoquan He Cc: kexec, linux-arm-kernel, Michal Suchanek, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, keyrings, linux-security-module, stable, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT), H. Peter Anvin, open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) On Thu, May 12, 2022 at 02:22:57PM +0800, Baoquan He wrote: >On 05/12/22 at 12:33pm, Coiby Xu wrote: [...] >> > Just to make clear , is this patch fixing an issue, or it's just an >> > preparation for later patch's use? >> > >> > Or I should ask in another way, any problem is solved with this patch? >> >> At least it doesn't fix an issue that satisfy the criteria listed in >> https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html > >Then it should not be CC-ed to stable. OK, I'll drop "CC:" in next version. > >> >> > >> > >> > > > Reviewed-by: Michal Suchanek <msuchanek@suse.de> >> > > > Signed-off-by: Coiby Xu <coxu@redhat.com> >> > > > --- >> > > >> > > You can put the note here, it won't be added to commit log when merged. >> > > Maybe it can be removed when merged. >> >> Thanks for the suggestion! Shall I send a version to fix this problem or >> can I just bother the maintainer to remove it? > >Better send a clean one, it will save maintainer's time, they can pick >it directly. Thanks for the confirmation! I'll simply delete them because, 1. these notes don't make sense anymore if I don't CC the patches to the stable tree 2. I've explained in the cover letter the first two patches are the prerequisite patches for the 3rd patch. -- Best regards, Coiby ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v7 3/4] arm64: kexec_file: use more system keyrings to verify kernel image signature [not found] <20220512023402.9913-1-coxu@redhat.com> 2022-05-12 2:34 ` [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic Coiby Xu @ 2022-05-12 2:34 ` Coiby Xu 2022-05-12 2:34 ` [PATCH v7 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Coiby Xu 2 siblings, 0 replies; 8+ messages in thread From: Coiby Xu @ 2022-05-12 2:34 UTC (permalink / raw) To: kexec Cc: linux-arm-kernel, Michal Suchanek, Baoquan He, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, stable, keyrings, linux-security-module, Catalin Marinas, James Morse, AKASHI Takahiro, open list Currently, a problem faced by arm64 is if a kernel image is signed by a MOK key, loading it via the kexec_file_load() system call would be rejected with the error "Lockdown: kexec: kexec of unsigned images is restricted; see man kernel_lockdown.7". This happens because image_verify_sig uses only the primary keyring that contains only kernel built-in keys to verify the kexec image. This patch allows to verify arm64 kernel image signature using not only .builtin_trusted_keys but also .platform and .secondary_trusted_keys keyring. Fixes: 732b7b93d849 ("arm64: kexec_file: add kernel signature verification support") Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig Cc: stable@vger.kernel.org # 83b7bb2d49ae: kexec, KEYS: make the code in bzImage64_verify_sig generic Acked-by: Baoquan He <bhe@redhat.com> Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Co-developed-by: Michal Suchanek <msuchanek@suse.de> Signed-off-by: Michal Suchanek <msuchanek@suse.de> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Coiby Xu <coxu@redhat.com> --- arch/arm64/kernel/kexec_image.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 9ec34690e255..5ed6a585f21f 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -14,7 +14,6 @@ #include <linux/kexec.h> #include <linux/pe.h> #include <linux/string.h> -#include <linux/verification.h> #include <asm/byteorder.h> #include <asm/cpufeature.h> #include <asm/image.h> @@ -130,18 +129,10 @@ static void *image_load(struct kimage *image, return NULL; } -#ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG -static int image_verify_sig(const char *kernel, unsigned long kernel_len) -{ - return verify_pefile_signature(kernel, kernel_len, NULL, - VERIFYING_KEXEC_PE_SIGNATURE); -} -#endif - const struct kexec_file_ops kexec_image_ops = { .probe = image_probe, .load = image_load, #ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG - .verify_sig = image_verify_sig, + .verify_sig = kexec_kernel_verify_pe_sig, #endif }; -- 2.35.3 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v7 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification [not found] <20220512023402.9913-1-coxu@redhat.com> 2022-05-12 2:34 ` [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic Coiby Xu 2022-05-12 2:34 ` [PATCH v7 3/4] arm64: kexec_file: use more system keyrings to verify kernel image signature Coiby Xu @ 2022-05-12 2:34 ` Coiby Xu 2 siblings, 0 replies; 8+ messages in thread From: Coiby Xu @ 2022-05-12 2:34 UTC (permalink / raw) To: kexec Cc: linux-arm-kernel, Michal Suchanek, Baoquan He, Dave Young, Will Deacon, Eric W . Biederman, Mimi Zohar, Chun-Yi Lee, stable, Philipp Rudo, keyrings, linux-security-module, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Christian Borntraeger, Sven Schnelle, Martin Schwidefsky, open list:S390, open list From: Michal Suchanek <msuchanek@suse.de> commit e23a8020ce4e ("s390/kexec_file: Signature verification prototype") adds support for KEXEC_SIG verification with keys from platform keyring but the built-in keys and secondary keyring are not used. Add support for the built-in keys and secondary keyring as x86 does. Fixes: e23a8020ce4e ("s390/kexec_file: Signature verification prototype") Cc: stable@vger.kernel.org Cc: Philipp Rudo <prudo@linux.ibm.com> Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Signed-off-by: Michal Suchanek <msuchanek@suse.de> Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com> Acked-by: Baoquan He <bhe@redhat.com> Signed-off-by: Coiby Xu <coxu@redhat.com> --- arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index 8f43575a4dd3..fc6d5f58debe 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -31,6 +31,7 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) const unsigned long marker_len = sizeof(MODULE_SIG_STRING) - 1; struct module_signature *ms; unsigned long sig_len; + int ret; /* Skip signature verification when not secure IPLed. */ if (!ipl_secure_flag) @@ -65,11 +66,18 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) return -EBADMSG; } - return verify_pkcs7_signature(kernel, kernel_len, - kernel + kernel_len, sig_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_MODULE_SIGNATURE, - NULL, NULL); + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + return ret; } #endif /* CONFIG_KEXEC_SIG */ -- 2.35.3 ^ permalink raw reply related [flat|nested] 8+ messages in thread
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2022-05-12 2:34 ` [PATCH v7 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic Coiby Xu
2022-05-12 2:46 ` Baoquan He
2022-05-12 3:52 ` Baoquan He
2022-05-12 4:33 ` Coiby Xu
2022-05-12 6:22 ` Baoquan He
2022-05-12 6:54 ` Coiby Xu
2022-05-12 2:34 ` [PATCH v7 3/4] arm64: kexec_file: use more system keyrings to verify kernel image signature Coiby Xu
2022-05-12 2:34 ` [PATCH v7 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Coiby Xu
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