From nobody Mon Dec 1 23:34:58 2025 Received: from smtpbg154.qq.com (smtpbg154.qq.com [15.184.224.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7673C2D6E7C for ; Wed, 26 Nov 2025 08:46:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=15.184.224.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764146780; cv=none; b=bIzPvIzj7Tbp9sJiGPrqbEAKqV80OSTcfXaojKI5XhAA6KBp9phSF8xTcihYWIilV7I7zYk4OGYTH65GZl/SWToViEw+gDiPqBlagigTMLu5L4IENHlntJqEkIX86e43/iF2VF02CMWJO7PMnF/ZetagkTc///1wyY1BMKQY99c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764146780; c=relaxed/simple; bh=4aglrJL59adAqF1Wlfr3wfM0tQSoHETQpMw62HmaduY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=se68jibfS8tdjskF90uhlyYToilgNDEHTZRumpgJrMLBBycaMN24h21cf5Imv5E6ZsJqkuROghv08YU9UKyc6exHSiO65TRsdwg3xowzTYNnAoQyq7OYkjnqit9j6CXZhQKZ4Fm/hSkjPbSR2pc9xWN+qX6Ja0gOiwe8e3bDQxg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=lhUUGRDa; arc=none smtp.client-ip=15.184.224.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="lhUUGRDa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764146736; bh=WufCdDOpzfL/WfQ3htR6pHmHReVaZ+8ySuuRY7Lmf9g=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=lhUUGRDauK/AI2nblJZp5Xq0G6QtNYjkYdU21rs/5R0XxQXcIsAnwxU3lFpyCl80E S4QEdAWWM4RHnFdKcKMi6qORy2FrsWZcvEnnGjI0QBkRpbctDg2DRUaG34c++HK21J neO5vZUgBPtE/dxpLNbqH93NuqWxhZMEP/abP2AQ= X-QQ-mid: zesmtpgz7t1764146731t05aa1bad X-QQ-Originating-IP: rjDpBB+HlmgtOOJx3N41NKQSqniequPMppjqpg9r/ME= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 26 Nov 2025 16:45:07 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 4168768459753501341 EX-QQ-RecipientCnt: 5 From: Qiang Ma To: akpm@linux-foundation.org, bhe@redhat.com Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Qiang Ma Subject: [PATCH v3 1/3] kexec: Fix uninitialized struct kimage *image pointer Date: Wed, 26 Nov 2025 16:44:25 +0800 Message-Id: <20251126084427.3222212-2-maqianga@uniontech.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20251126084427.3222212-1-maqianga@uniontech.com> References: <20251126084427.3222212-1-maqianga@uniontech.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: OQhZ3T0tjf0aipUoODJiBJfVzWfh7sTjffBRh/jiLQkPX80f/edV/qCi NnfWqpapYAKQQO+SwqXukYaDt0D6FXp+SOlPoN4/LMCOl232VzTfmc+v15hHwV1pAAP1PlX WHHOLmURdgtvfV2lBMJsINTU/0yQWf0icIr5jKRHjcWth2G63fBiPkH0zEA4A6Sd99wEDsM rl/VXijWIeHbEd8cpKEjTs5uHb62+cWOBQ3zwLLyxsZeRvj9oBlJn2Dm9NEKlQAzyKy2++Q HfndFdxvnNZ6wjrfuxAvshGyM8KTRfLSYt+wppoAcizynju16Lz955gFbrSK4l3S3XDkAx8 ypePyrrdmZvk8U/tDOrJu/YNvaPju0FsbssrW/0QQdSaw2vBhudlL6gjSWt7MX8UjIMf1Ju Mkxc9TB9Mt92i9y9Q2JMh+19+euxBBaQv4jec2cdyhowOMs6O3z+YZTO3VDm7sd7K8M4Rje EeOVuPPObcol7TJOJKV3VFTE0Bnh2VmVI/JS+zlcI08jz+JApEIcmvMisW4TV9eGhLMfXc5 Gw+HSKgMbhPoj2WHz9iN/4B3+h+6Pn6zLzpE8+rFb2bqHXrAeUXUMQRXF81U6M1E3OXV3lV Q277rnxY4honUzbpcJ+RhUHmWxW8P8+AGK/zeKfgn3WVKuyzWt7Dr+FtW2acyURDuyahycB 0kbVcS+9t0LSlD3sjYAb10rHA+/ylMwMEda2da6x+DeZ9Ne2ssoyhwe+14TKRM4FOE4jIJ7 k3SfNM7MbypzetylHvdwtnT64mY/O33TVjaJBkYiIUUHeED6u0/OiN7I8ZjaJ8ydRVlaLWl NxNNajDxtri6v9wvkqZ+5URVvlWNey/irNndzaqVMLQ//xY23MVoA6l9mibvxBEY59W3sHL DwVfpF2IYYLFJCz9VerR46Ho+HnLdeilxjQzllP6DuBIgeBxd6BcGJLZLXtTuwlATOs+Cql IhUJJQlgZzvs+OtY9Gsf6zznZk025SWOo2nXCVmAjdGoYxAtGLZvbRL+/W1En90RZ4q0Msk paFhllOaKwQAc0hEzkauzAfHNJCDKFgIz53UC4gA== X-QQ-XMRINFO: NyFYKkN4Ny6FSmKK/uo/jdU= X-QQ-RECHKSPAM: 0 Content-Type: text/plain; charset="utf-8" The image is initialized to NULL. Then, after calling kimage_alloc_init, we can directly goto 'out' because at this time, the kimage_free will determine whether image is a NULL pointer. This can also prepare for the subsequent patch's kexec_core_dbg_print to be reset to zero in kimage_free. Signed-off-by: Qiang Ma --- kernel/kexec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/kexec.c b/kernel/kexec.c index 28008e3d462e..9bb1f2b6b268 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -95,6 +95,8 @@ static int do_kexec_load(unsigned long entry, unsigned lo= ng nr_segments, unsigned long i; int ret; =20 + image =3D NULL; + /* * Because we write directly to the reserved memory region when loading * crash kernels we need a serialization here to prevent multiple crash @@ -129,7 +131,7 @@ static int do_kexec_load(unsigned long entry, unsigned = long nr_segments, =20 ret =3D kimage_alloc_init(&image, entry, nr_segments, segments, flags); if (ret) - goto out_unlock; + goto out; =20 if (flags & KEXEC_PRESERVE_CONTEXT) image->preserve_context =3D 1; --=20 2.20.1 From nobody Mon Dec 1 23:34:58 2025 Received: from smtpbgeu2.qq.com (smtpbgeu2.qq.com [18.194.254.142]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8BE53016E0 for ; 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charset="utf-8" The commit a85ee18c7900 ("kexec_file: print out debugging message if required") has added general code printing in kexec_file_load(), but not in kexec_load(). Since kexec_load and kexec_file_load are not triggered simultaneously, we can unify the debug flag of kexec and kexec_file as kexec_dbg_print. Next, we need to do four things: 1. rename kexec_file_dbg_print to kexec_dbg_print 2. Add KEXEC_DEBUG 3. Initialize kexec_dbg_print for kexec 4. Set the reset of kexec_dbg_print to kimage_free Signed-off-by: Qiang Ma --- include/linux/kexec.h | 9 +++++---- include/uapi/linux/kexec.h | 1 + kernel/kexec.c | 1 + kernel/kexec_core.c | 4 +++- kernel/kexec_file.c | 4 +--- 5 files changed, 11 insertions(+), 8 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h index ff7e231b0485..23f10aec0b34 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -455,10 +455,11 @@ bool kexec_load_permitted(int kexec_image_type); =20 /* List of defined/legal kexec flags */ #ifndef CONFIG_KEXEC_JUMP -#define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_UPDATE_ELFCOREHDR | KEXEC_C= RASH_HOTPLUG_SUPPORT) +#define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_UPDATE_ELFCOREHDR | KEXEC_C= RASH_HOTPLUG_SUPPORT | \ + KEXEC_DEBUG) #else #define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT | KEXEC_UP= DATE_ELFCOREHDR | \ - KEXEC_CRASH_HOTPLUG_SUPPORT) + KEXEC_CRASH_HOTPLUG_SUPPORT | KEXEC_DEBUG) #endif =20 /* List of defined/legal kexec file flags */ @@ -525,10 +526,10 @@ static inline int arch_kexec_post_alloc_pages(void *v= addr, unsigned int pages, g static inline void arch_kexec_pre_free_pages(void *vaddr, unsigned int pag= es) { } #endif =20 -extern bool kexec_file_dbg_print; +extern bool kexec_dbg_print; =20 #define kexec_dprintk(fmt, arg...) \ - do { if (kexec_file_dbg_print) pr_info(fmt, ##arg); } while (0) + do { if (kexec_dbg_print) pr_info(fmt, ##arg); } while (0) =20 extern void *kimage_map_segment(struct kimage *image, unsigned long addr, = unsigned long size); extern void kimage_unmap_segment(void *buffer); diff --git a/include/uapi/linux/kexec.h b/include/uapi/linux/kexec.h index 55749cb0b81d..819c600af125 100644 --- a/include/uapi/linux/kexec.h +++ b/include/uapi/linux/kexec.h @@ -14,6 +14,7 @@ #define KEXEC_PRESERVE_CONTEXT 0x00000002 #define KEXEC_UPDATE_ELFCOREHDR 0x00000004 #define KEXEC_CRASH_HOTPLUG_SUPPORT 0x00000008 +#define KEXEC_DEBUG 0x00000010 #define KEXEC_ARCH_MASK 0xffff0000 =20 /* diff --git a/kernel/kexec.c b/kernel/kexec.c index 9bb1f2b6b268..f6c58c767eb0 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -42,6 +42,7 @@ static int kimage_alloc_init(struct kimage **rimage, unsi= gned long entry, if (!image) return -ENOMEM; =20 + kexec_dbg_print =3D !!(flags & KEXEC_DEBUG); image->start =3D entry; image->nr_segments =3D nr_segments; memcpy(image->segment, segments, nr_segments * sizeof(*segments)); diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index fa00b239c5d9..7bc1cd4105fc 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -53,7 +53,7 @@ atomic_t __kexec_lock =3D ATOMIC_INIT(0); /* Flag to indicate we are going to kexec a new kernel */ bool kexec_in_progress =3D false; =20 -bool kexec_file_dbg_print; +bool kexec_dbg_print; =20 /* * When kexec transitions to the new kernel there is a one-to-one @@ -576,6 +576,8 @@ void kimage_free(struct kimage *image) kimage_entry_t *ptr, entry; kimage_entry_t ind =3D 0; =20 + kexec_dbg_print =3D false; + if (!image) return; =20 diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index eb62a9794242..3f1d6c4e8ff2 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -138,8 +138,6 @@ void kimage_file_post_load_cleanup(struct kimage *image) */ kfree(image->image_loader_data); image->image_loader_data =3D NULL; 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a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764146759; bh=qGNuORN0t3L6I+PuR7sub8AbC3vZBOSESWhy7WJ2t8U=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=TqjHmuHApgPBK7SGiiaVQQJbevRmaqBwKlHrJSfMzvJEJvge8vxDUQu7AAH0c+fC2 vMaeVx6VHe8hYU7ofVKj3yK7JAHXObA07NO6KoJgMR6BYwUkqwkGkotEZ8MoiD03bU J7wWPGEujuFWXBhsABVMq4uMSTmW+XioNQLxcSOM= X-QQ-mid: zesmtpgz7t1764146739t764c441f X-QQ-Originating-IP: Vr8J1j+CLmg91OoUs+VveyFmBNz+sNXr0fX3rVYxhaM= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 26 Nov 2025 16:45:37 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 2413188078539060852 EX-QQ-RecipientCnt: 6 From: Qiang Ma To: akpm@linux-foundation.org, bhe@redhat.com Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Qiang Ma , kernel test robot Subject: [PATCH v3 3/3] kexec: print out debugging message if required for kexec_load Date: Wed, 26 Nov 2025 16:44:27 +0800 Message-Id: <20251126084427.3222212-4-maqianga@uniontech.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20251126084427.3222212-1-maqianga@uniontech.com> References: <20251126084427.3222212-1-maqianga@uniontech.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: NhUkPfKlCtQw9TcIzUupQSdZhEzk4ofBsDYkBhfqKN4NmwuIiAh4teii 7IK2nUdopWwS/6SCcv28zK56PGMWbySdfo8ptoIbLno92phJBzKXNbwt3tBZV2k81aWK+XT WzuNbGGTph72ph8T8EwRM43Zfa5ZBv6Dey1A6Iw3qfSnZNZYEaBkKHG/BcgFm+D0aUhwXeI W2YU7eOKRDwQ7WMZQlmU1eOR6aWRwd4t9N5UBTyNyLftgTYFUNEwIJRazI2KyLG3fztaZNw +IbZ9uja9TpsKOOLLzf+SiHinHU0geqYRSmM05UKT/zhob1OLLerkSeMe8BMJVmiukZYsOF kuudNBhZwPwXYl7O8dI3QL+ZAvXThK5RMMoo7wCamvsZJWYsZYAoxokjPCjw0L9iI2/SBdn G75AA3qxq40cklSlcTSMWJHJtB1sdyvM/dRksZvpH30pano7/wB5104Qaauaxci+up4nTv5 gkBtuEP2Wol10nZH8ZmqJymF17/5NiUYs8ZXrvRo1wX5uEINX6ubcDZV4lDCoUr37QCGZ2M oSaoUKahnnpOkelV/qbYmANyHe4bEju2YC24jzObLLcH46FS/Cov69N9wHbJb0x+GO4VLbX OcJtaIIxUomx+GwCjvo2HJwofeTkRPxbOOJ+ISIRUE7ZsClEhCPJXMorHaB3Vl9M52c6lRe U+v16PU7iIUNT5WjaIdhj1EBltYGl1w+InkZVh5f/CGjCd96weZXN4dVOCboXZahiy8HcxH clLK7CGYhHw167+3apusYSHmXIJnzPx92c1GB6vNLCwlQhzQJClztf3EcaaE0jQ+p3Mfy7R KrPt+hKEm2/xaCEviynMWxOCV8SihP43rVpnKeWuT7sikzhDKKWvWuwOyZb12U43QpYWhKG SR/IhN6pZKbw19g4t5Ctbc9eC6CCA/aqKLChG4qV3a30bfYmL5WKrR+mLoeUz2H1GrPYnsD v4BsIiEfLfYTizz23UGfp0qw3sj8TWusP+65NEWANFEn3rBDk9geDur9aSuF/L+HaFyEngM +cCDxQCfkHfGZS3LBeLh4TSoqNsIDNQExNwYiF4u5te+soMWCHE/owQKcgw5E3koitY2QRk g== X-QQ-XMRINFO: MSVp+SPm3vtS1Vd6Y4Mggwc= X-QQ-RECHKSPAM: 0 Content-Type: text/plain; charset="utf-8" The commit a85ee18c7900 ("kexec_file: print out debugging message if required") has added general code printing in kexec_file_load(), but not in kexec_load(). As a result, when using '-d' for the kexec_load interface, print nothing in the kernel space. And print out type/start/head of kimage and flags to help debug. Signed-off-by: Qiang Ma Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510310332.6XrLe70K-lkp@int= el.com/ --- kernel/kexec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/kexec.c b/kernel/kexec.c index f6c58c767eb0..37e4ac8af9f3 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -166,6 +166,9 @@ static int do_kexec_load(unsigned long entry, unsigned = long nr_segments, if (ret) goto out; =20 + kexec_dprintk("kexec_load: type:%u, start:0x%lx head:0x%lx flags:0x%lx\n", + image->type, image->start, image->head, flags); + /* Install the new kernel and uninstall the old */ image =3D xchg(dest_image, image); =20 --=20 2.20.1