From nobody Mon Feb 9 00:29:58 2026 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) (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 A9CE8405CB; Fri, 1 Mar 2024 03:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709262696; cv=none; b=afak2klYvQquUYCU5QQoEBWcNatjNl0/Rm2T79etWkX+o5PIHPtR23AM61ekwHl+Ky4qUMRFcBXtq5sMr0N0HWEvYUmrSLxRcT6YTSmjjtd1c7FvQAPCM50emBP1EGpQ+MD0rv5q5Hygzz6GyE6FUGVdpgCvPXUt2IZfKU7ovCc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709262696; c=relaxed/simple; bh=WUwDqW735WBIpBsVa8/8CiRZzuogbV8BNEvaplkzE2w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HunqmmQz/qwkRmsRusaIBC0Zf27+JMG53U0vQSnkqZb6969f5w4xDXUyFhpYptodNVfULXLcUn3T3Yd/gSI0Jl2RLqaMGD1Ayl/d7RBPNLCeOmlroDGvVadDMogzXgLblHQhaPFOgj95LNAWhSFpfT9xq4m8uoQi7V6Vz91f2m8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4TmCmB2bZvz4f3m7P; Fri, 1 Mar 2024 11:11:22 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id B611D1A0838; Fri, 1 Mar 2024 11:11:29 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.101.6]) by APP4 (Coremail) with SMTP id gCh0CgD3SGtfR+FlBJ6mFg--.42023S3; Fri, 01 Mar 2024 11:11:29 +0800 (CST) From: Kemeng Shi To: tytso@mit.edu, adilger.kernel@dilger.ca Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, naresh.kamboju@linaro.org, daniel.diaz@linaro.org, linux@roeck-us.net, brauner@kernel.org Subject: [PATCH 1/2] ext4: alloc test super block from sget Date: Fri, 1 Mar 2024 20:08:15 +0800 Message-Id: <20240301120816.22581-2-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240301120816.22581-1-shikemeng@huaweicloud.com> References: <20240301120816.22581-1-shikemeng@huaweicloud.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-CM-TRANSID: gCh0CgD3SGtfR+FlBJ6mFg--.42023S3 X-Coremail-Antispam: 1UD129KBjvJXoWxGF1rGw1DCr18uw1fJF47Jwb_yoWrXry7pa 43AFyrCr47uF4q9an7JFykXr1S9a1xuryDGrWI9w15Ja4Ygry8JFWvyF10yrW0qrZ7GFZ3 ZF1UKrWUCr4UGa7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBjb4IE77IF4wAFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M280x2IEY4vEnII2IxkI6r1a6r45M2 8IrcIa0xkI8VA2jI8067AKxVWUGwA2048vs2IY020Ec7CjxVAFwI0_JFI_Gr1l8cAvFVAK 0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4 x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJr0_GcWl84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2 z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4 xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v2 6r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwI xGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jsIDcUUUUU= X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ Content-Type: text/plain; charset="utf-8" This fix the oops in ext4 unit test which is cuased by NULL sb.s_user_ns as following: <4>[ 14.344565] map_id_range_down (kernel/user_namespace.c:318) <4>[ 14.345378] make_kuid (kernel/user_namespace.c:415) <4>[ 14.345998] inode_init_always (include/linux/fs.h:1375 fs/inode.c:174) <4>[ 14.346696] alloc_inode (fs/inode.c:268) <4>[ 14.347353] new_inode_pseudo (fs/inode.c:1007) <4>[ 14.348016] new_inode (fs/inode.c:1033) <4>[ 14.348644] ext4_mb_init (fs/ext4/mballoc.c:3404 fs/ext4/mballoc.c:3719) <4>[ 14.349312] mbt_kunit_init (fs/ext4/mballoc-test.c:57 fs/ext4/mballoc-test.c:314) <4>[ 14.349983] kunit_try_run_case (lib/kunit/test.c:388 lib/kunit/test.c:4= 43) <4>[ 14.350696] kunit_generic_run_threadfn_adapter (lib/kunit/try-catch.c:3= 0) <4>[ 14.351530] kthread (kernel/kthread.c:388) <4>[ 14.352168] ret_from_fork (arch/arm64/kernel/entry.S:861) <0>[ 14.353385] Code: 52808004 b8236ae7 72be5e44 b90004c4 (38e368a1) Alloc test super block from sget to properly initialize test super block to fix the issue. Signed-off-by: Kemeng Shi Reported-by: Linux Kernel Functional Testing Reported-by: Guenter Roeck --- fs/ext4/mballoc-test.c | 46 ++++++++++++++++++++++++++++-------------- 1 file changed, 31 insertions(+), 15 deletions(-) diff --git a/fs/ext4/mballoc-test.c b/fs/ext4/mballoc-test.c index 12d0b22cabe1..1da52bbf4599 100644 --- a/fs/ext4/mballoc-test.c +++ b/fs/ext4/mballoc-test.c @@ -21,16 +21,27 @@ struct mbt_ctx { }; =20 struct mbt_ext4_super_block { - struct super_block sb; + struct ext4_super_block es; + struct ext4_sb_info sbi; struct mbt_ctx mbt_ctx; }; =20 -#define MBT_CTX(_sb) (&(container_of((_sb), struct mbt_ext4_super_block, s= b)->mbt_ctx)) +#define MBT_SB(_sb) (container_of((_sb)->s_fs_info, struct mbt_ext4_super_= block, sbi)) +#define MBT_CTX(_sb) (&MBT_SB(_sb)->mbt_ctx) #define MBT_GRP_CTX(_sb, _group) (&MBT_CTX(_sb)->grp_ctx[_group]) =20 static const struct super_operations mbt_sops =3D { }; =20 +static void mbt_kill_sb(struct super_block *sb) +{ +} + +static struct file_system_type mbt_fs_type =3D { + .name =3D "mballoc test", + .kill_sb =3D mbt_kill_sb, +}; + static int mbt_mb_init(struct super_block *sb) { int ret; @@ -72,43 +83,48 @@ static void mbt_mb_release(struct super_block *sb) kfree(sb->s_bdev); } =20 +static int mbt_set(struct super_block *sb, void *data) +{ + return 0; +} + static struct super_block *mbt_ext4_alloc_super_block(void) { - struct ext4_super_block *es =3D kzalloc(sizeof(*es), GFP_KERNEL); - struct ext4_sb_info *sbi =3D kzalloc(sizeof(*sbi), GFP_KERNEL); struct mbt_ext4_super_block *fsb =3D kzalloc(sizeof(*fsb), GFP_KERNEL); + struct super_block *sb =3D sget(&mbt_fs_type, NULL, mbt_set, 0, NULL); + struct ext4_sb_info *sbi; =20 - if (fsb =3D=3D NULL || sbi =3D=3D NULL || es =3D=3D NULL) + if (fsb =3D=3D NULL || sb =3D=3D NULL) goto out; =20 + sbi =3D &fsb->sbi; + sbi->s_blockgroup_lock =3D kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); if (!sbi->s_blockgroup_lock) - goto out; + goto out_deactivate; =20 bgl_lock_init(sbi->s_blockgroup_lock); =20 - sbi->s_es =3D es; - fsb->sb.s_fs_info =3D sbi; + sbi->s_es =3D &fsb->es; + sb->s_fs_info =3D sbi; =20 - return &fsb->sb; + return sb; =20 +out_deactivate: + deactivate_locked_super(sb); out: kfree(fsb); - kfree(sbi); - kfree(es); return NULL; } =20 static void mbt_ext4_free_super_block(struct super_block *sb) { - struct mbt_ext4_super_block *fsb =3D - container_of(sb, struct mbt_ext4_super_block, sb); + struct mbt_ext4_super_block *fsb =3D MBT_SB(sb); struct ext4_sb_info *sbi =3D EXT4_SB(sb); =20 kfree(sbi->s_blockgroup_lock); - kfree(sbi->s_es); - kfree(sbi); + deactivate_locked_super(sb); kfree(fsb); } =20 --=20 2.30.0 From nobody Mon Feb 9 00:29:58 2026 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) (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 A9C6F2BAE7; Fri, 1 Mar 2024 03:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; 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Fri, 1 Mar 2024 11:11:26 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 1B7CD1A0838; Fri, 1 Mar 2024 11:11:30 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.101.6]) by APP4 (Coremail) with SMTP id gCh0CgD3SGtfR+FlBJ6mFg--.42023S4; Fri, 01 Mar 2024 11:11:29 +0800 (CST) From: Kemeng Shi To: tytso@mit.edu, adilger.kernel@dilger.ca Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, naresh.kamboju@linaro.org, daniel.diaz@linaro.org, linux@roeck-us.net, brauner@kernel.org Subject: [PATCH 2/2] ext4: hold group lock in ext4 kunit test Date: Fri, 1 Mar 2024 20:08:16 +0800 Message-Id: <20240301120816.22581-3-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240301120816.22581-1-shikemeng@huaweicloud.com> References: <20240301120816.22581-1-shikemeng@huaweicloud.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-CM-TRANSID: gCh0CgD3SGtfR+FlBJ6mFg--.42023S4 X-Coremail-Antispam: 1UD129KBjvJXoW7tw1UuFyUArWrur17KFyUJrb_yoW8ArW8pF sIkrn0kF45Wr1kuw47G3y0q3Z7K3ykuw1UGrWfC345ArWfJr9rCF98twnxKr48tFs7XF45 Z3Z0vry3Crs7uaUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBjb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M280x2IEY4vEnII2IxkI6r1a6r45M2 8IrcIa0xkI8VA2jI8067AKxVWUXwA2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK 0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4 x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJr0_GcWl84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2 z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4 xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v2 6r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwI xGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jhUUbUUUUU= X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ Content-Type: text/plain; charset="utf-8" Although there is no concurrent block allocation/free in unit test, internal functions mb_mark_used and mb_free_blocks assert group lock is always held. Acquire group before calling mb_mark_used and mb_free_blocks in unit test to avoid the assertion. Signed-off-by: Kemeng Shi Reported-by: Guenter Roeck --- fs/ext4/mballoc-test.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/ext4/mballoc-test.c b/fs/ext4/mballoc-test.c index 1da52bbf4599..40e878ea8258 100644 --- a/fs/ext4/mballoc-test.c +++ b/fs/ext4/mballoc-test.c @@ -694,7 +694,10 @@ test_mb_mark_used_range(struct kunit *test, struct ext= 4_buddy *e4b, ex.fe_start =3D start; ex.fe_len =3D len; ex.fe_group =3D TEST_GOAL_GROUP; + + ext4_lock_group(sb, TEST_GOAL_GROUP); mb_mark_used(e4b, &ex); + ext4_unlock_group(sb, TEST_GOAL_GROUP); =20 mb_set_bits(bitmap, start, len); /* bypass bb_free validatoin in ext4_mb_generate_buddy */ @@ -754,7 +757,9 @@ test_mb_free_blocks_range(struct kunit *test, struct ex= t4_buddy *e4b, if (len =3D=3D 0) return; =20 + ext4_lock_group(sb, e4b->bd_group); mb_free_blocks(NULL, e4b, start, len); + ext4_unlock_group(sb, e4b->bd_group); =20 mb_clear_bits(bitmap, start, len); /* bypass bb_free validatoin in ext4_mb_generate_buddy */ @@ -798,7 +803,11 @@ static void test_mb_free_blocks(struct kunit *test) ex.fe_start =3D 0; ex.fe_len =3D EXT4_CLUSTERS_PER_GROUP(sb); ex.fe_group =3D TEST_GOAL_GROUP; + + ext4_lock_group(sb, TEST_GOAL_GROUP); mb_mark_used(&e4b, &ex); + ext4_unlock_group(sb, TEST_GOAL_GROUP); + grp->bb_free =3D 0; memset(bitmap, 0xff, sb->s_blocksize); =20 --=20 2.30.0