* [PATCH 4.9 42/63] Fix kexec forbidding kernels signed with keys in the secondary keyring to boot
[not found] <20180907211012.965501324@linuxfoundation.org>
@ 2018-09-07 21:10 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2018-09-07 21:10 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, kexec, linux-security-module, stable,
David Howells, Yannik Sembritzki, keyrings, Linus Torvalds,
stable
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yannik Sembritzki <yannik@sembritzki.me>
commit ea93102f32244e3f45c8b26260be77ed0cc1d16c upstream.
The split of .system_keyring into .builtin_trusted_keys and
.secondary_trusted_keys broke kexec, thereby preventing kernels signed by
keys which are now in the secondary keyring from being kexec'd.
Fix this by passing VERIFY_USE_SECONDARY_KEYRING to
verify_pefile_signature().
Fixes: d3bfe84129f6 ("certs: Add a secondary system keyring that can be added to dynamically")
Signed-off-by: Yannik Sembritzki <yannik@sembritzki.me>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: kexec@lists.infradead.org
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/kexec-bzimage64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -529,7 +529,7 @@ static int bzImage64_cleanup(void *loade
static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len)
{
return verify_pefile_signature(kernel, kernel_len,
- NULL,
+ VERIFY_USE_SECONDARY_KEYRING,
VERIFYING_KEXEC_PE_SIGNATURE);
}
#endif
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