{"id":2217753,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2217753/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260330133035.287842-5-yebin@huaweicloud.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.2/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260330133035.287842-5-yebin@huaweicloud.com>","list_archive_url":null,"date":"2026-03-30T13:30:34","name":"[v5,4/5] ext4: fix possible null-ptr-deref in extents_kunit_exit()","commit_ref":null,"pull_url":null,"state":"awaiting-upstream","archived":false,"hash":"e6b8b65169d42d9fdd92994215f430b45c8fda95","submitter":{"id":85089,"url":"http://patchwork.ozlabs.org/api/1.2/people/85089/?format=json","name":"Ye Bin","email":"yebin@huaweicloud.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260330133035.287842-5-yebin@huaweicloud.com/mbox/","series":[{"id":498033,"url":"http://patchwork.ozlabs.org/api/1.2/series/498033/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=498033","date":"2026-03-30T13:30:32","name":"Fix some issues about ext4-test","version":5,"mbox":"http://patchwork.ozlabs.org/series/498033/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2217753/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2217753/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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gandalf.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=pass (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15538-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org","i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=none smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51"],"From":"Ye Bin ","To":"tytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tlinux-ext4@vger.kernel.org","Cc":"jack@suse.cz","Subject":"[PATCH v5 4/5] ext4: fix possible null-ptr-deref in\n extents_kunit_exit()","Date":"Mon, 30 Mar 2026 21:30:34 +0800","Message-Id":"<20260330133035.287842-5-yebin@huaweicloud.com>","X-Mailer":"git-send-email 2.34.1","In-Reply-To":"<20260330133035.287842-1-yebin@huaweicloud.com>","References":"<20260330133035.287842-1-yebin@huaweicloud.com>","Precedence":"bulk","X-Mailing-List":"linux-ext4@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-CM-TRANSID":"gCh0CgDHn0p7e8pp7U0sCw--.17260S8","X-Coremail-Antispam":"1UD129KBjvJXoW7uFyrtw48CF1fCr1ruw1fCrg_yoW8XFykpr\n\tsxCF4UKr48Zw1UCFWxGFy5tryakan7CFW7uryxJa1agayDCry8Kr1UKr1UKFZ8XF48JFy5\n\tuF10v34UK3W3KaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDU0xBIdaVrnRJUUUvEb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2\n\t6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV\n\tCq3wA2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0\n\trcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267\n\tAKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E\n\t14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7\n\txfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y\n\tz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7\n\tv_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF\n\t1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIx\n\tAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI\n\t42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWI\n\tevJa73UjIFyTuYvjxU2CJmUUUUU","X-CM-SenderInfo":"p1hex046kxt4xhlfz01xgou0bp/","X-Spam-Status":"No, score=-1.1 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDMARC_MISSING,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"From: Ye Bin \n\nThere's issue as follows:\nKASAN: null-ptr-deref in range [0x00000000000002c0-0x00000000000002c7]\nTainted: [E]=UNSIGNED_MODULE, [N]=TEST\nRIP: 0010:extents_kunit_exit+0x2e/0xc0 [ext4_test]\nCall Trace:\n \n kunit_try_run_case_cleanup+0xbc/0x100 [kunit]\n kunit_generic_run_threadfn_adapter+0x89/0x100 [kunit]\n kthread+0x408/0x540\n ret_from_fork+0xa76/0xdf0\n ret_from_fork_asm+0x1a/0x30\n\nAbove issue happens as extents_kunit_init() init testcase failed.\nSo test if testcase is inited success.\n\nFixes: cb1e0c1d1fad (\"ext4: kunit tests for extent splitting and conversion\")\nSigned-off-by: Ye Bin \nReviewed-by: Ojaswin Mujoo \nReviewed-by: Ritesh Harjani (IBM) \n---\n fs/ext4/extents-test.c | 7 +++++--\n 1 file changed, 5 insertions(+), 2 deletions(-)","diff":"diff --git a/fs/ext4/extents-test.c b/fs/ext4/extents-test.c\nindex 4042bc8a95e2..6b53a3f39fcd 100644\n--- a/fs/ext4/extents-test.c\n+++ b/fs/ext4/extents-test.c\n@@ -142,9 +142,12 @@ static struct file_system_type ext_fs_type = {\n \n static void extents_kunit_exit(struct kunit *test)\n {\n-\tstruct super_block *sb = k_ctx.k_ei->vfs_inode.i_sb;\n-\tstruct ext4_sb_info *sbi = sb->s_fs_info;\n+\tstruct ext4_sb_info *sbi;\n \n+\tif (!k_ctx.k_ei)\n+\t\treturn;\n+\n+\tsbi = k_ctx.k_ei->vfs_inode.i_sb->s_fs_info;\n \text4_es_unregister_shrinker(sbi);\n \tdeactivate_super(sbi->s_sb);\n \tkfree(sbi);\n","prefixes":["v5","4/5"]}