From patchwork Fri Nov 24 03:36:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 13466900 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="hID63naY" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8D351B2 for ; Thu, 23 Nov 2023 19:37:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1700797022; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ypSBKOvs5nashSP3TmwrugZ2AS56bQmFrg9V7LWlVpY=; b=hID63naY8LKi0tiS3c/dIbp3gmK6wg6/8mRJrHEZbEqZE8vl/mhbEiI1g27rtaNEuCSepo HIFEhTbpPhrlPobeODg5yeCzjr+roqQtAZdKBZJx/GGt5F5iHwDItIEQkQJE3DNvgCio0h BCpk4HvKSU7N9FBkU4pRAlgnL35WFHM= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-357-j-to0uXUNdemQMs-yqzn9w-1; Thu, 23 Nov 2023 22:37:00 -0500 X-MC-Unique: j-to0uXUNdemQMs-yqzn9w-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DF59B1C0434A; Fri, 24 Nov 2023 03:36:59 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id 61AAB492BE7; Fri, 24 Nov 2023 03:36:55 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-parisc@vger.kernel.org, akpm@linux-foundation.org, joe@perches.com, nathan@kernel.org, yujie.liu@intel.com, Baoquan He Subject: [PATCH v2 2/7] kexec_file: print out debugging message if required Date: Fri, 24 Nov 2023 11:36:37 +0800 Message-ID: <20231124033642.520686-3-bhe@redhat.com> In-Reply-To: <20231124033642.520686-1-bhe@redhat.com> References: <20231124033642.520686-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Replace pr_debug() with the newly added kexec_dprintk() in kexec_file loading related codes. And also print out type/start/head of kimage and flags to help debug. Signed-off-by: Baoquan He --- kernel/crash_core.c | 5 ++++- kernel/kexec_file.c | 7 ++++++- security/integrity/ima/ima_kexec.c | 2 +- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index efe87d501c8c..1485fd7bb67f 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -551,9 +551,12 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, phdr->p_filesz = phdr->p_memsz = mend - mstart + 1; phdr->p_align = 0; ehdr->e_phnum++; - pr_debug("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n", +#ifdef CONFIG_KEXEC_FILE + kexec_dprintk("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, " + "sz=0x%llx e_phnum=%d p_offset=0x%llx\n", phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz, ehdr->e_phnum, phdr->p_offset); +#endif phdr++; } diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 4c35500ae40a..7ae1b0901aa4 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -206,6 +206,8 @@ kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd, if (ret < 0) return ret; image->kernel_buf_len = ret; + kexec_dprintk("kernel: %p kernel_size: %#lx\n", + image->kernel_buf, image->kernel_buf_len); /* Call arch image probe handlers */ ret = arch_kexec_kernel_image_probe(image, image->kernel_buf, @@ -389,11 +391,12 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd, if (ret) goto out; + kexec_dprintk("nr_segments = %lu\n", image->nr_segments); for (i = 0; i < image->nr_segments; i++) { struct kexec_segment *ksegment; ksegment = &image->segment[i]; - pr_debug("Loading segment %d: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n", + kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n", i, ksegment->buf, ksegment->bufsz, ksegment->mem, ksegment->memsz); @@ -408,6 +411,8 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd, if (ret) goto out; + kexec_dprintk("kexec_file_load: type:%u, start:0x%lx head:0x%lx flags:0x%lx\n", + image->type, image->start, image->head, flags); /* * Free up any temporary buffers allocated which are not needed * after image has been loaded diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c index ad133fe120db..e692624bcab3 100644 --- a/security/integrity/ima/ima_kexec.c +++ b/security/integrity/ima/ima_kexec.c @@ -129,7 +129,7 @@ void ima_add_kexec_buffer(struct kimage *image) image->ima_buffer_size = kexec_segment_size; image->ima_buffer = kexec_buffer; - pr_debug("kexec measurement buffer for the loaded kernel at 0x%lx.\n", + kexec_dprintk("kexec measurement buffer for the loaded kernel at 0x%lx.\n", kbuf.mem); } #endif /* IMA_KEXEC */