From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 95D0FE77188 for ; Wed, 25 Dec 2024 02:38:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:To:From:Subject :Message-ID:In-Reply-To:Date:MIME-Version:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Owner; bh=QuqvXbvMtVZbZONDhOasqGVfY/yDi2zdrjMYFdTopNQ=; b=NhZaDOmpvR5Azr dxSIa9868TxbJ7gfdtbFO8B4tSgz/ALm+6wM2zUVOTHSCFUDW/Crsq+OsY+iI1YrUXt8a+zu4uFZj DE7p4un8TH9GZH3Y1ix1lCGAm9Qt25g0S/MEZfO6NdF0xMoTrX1ulHdlPBrWLAMnCi+9wGDAXdWvB flbdV20TEMeHqUGF5OezTSaE6GLaDtWRf3X0tYX4NUcHLkfDDyJksTomV48CEQaHygiRR2UWCMo9m dPaPPSyP/jT4raXXtHw0PF/Mesd1fegrFfgVLYB7CEyNwzRCRHom8XNbQm6osj7Rd0USa9nPaDuoM xHoK3ikfvJa38zSwEZOg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tQHI6-0000000D7Cf-2iJx; Wed, 25 Dec 2024 02:38:30 +0000 Received: from mail-io1-f80.google.com ([209.85.166.80]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tQHI2-0000000D7CK-3HV4 for linux-nvme@lists.infradead.org; Wed, 25 Dec 2024 02:38:28 +0000 Received: by mail-io1-f80.google.com with SMTP id ca18e2360f4ac-844e9b88efeso927247339f.0 for ; Tue, 24 Dec 2024 18:38:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735094305; x=1735699105; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QuqvXbvMtVZbZONDhOasqGVfY/yDi2zdrjMYFdTopNQ=; b=tD6Swr9GIhaX4X3gucTTdAcU11D6dNR9s8VXKeblUmShRHct5pUmrIA6l8YOIGfCNj h11GBLJQCl2MHk8MH0Bb4ffR4H3+FcUyf3ZAOjkCLy7ap/OJHcPuhDiEuPcrSkofy0Uy GmSxmc9DXcI7Q7ZEx9l+AVc075gaPGeHhhhsKFHvvH5aG5RpGTFxqWjG5j7LgosWC2FE g4dW/wZCDT4xfxbqBqKwH7e7fIIKk0hEHGR+qxHruPJwCQund5kFFucTlxF6j+jESL8F leez0nG3wwSFcCoAJ6PJkX5zXFLq6OrM/cZAsH8U5ZhU6IjwdZtg11dHR79bwkkkIJ+i FeZg== X-Forwarded-Encrypted: i=1; AJvYcCXbnJXLlW1ZR915dK3yTN4b06s8T+xjN9vHHBKTgIE9ztnZVeGSorVow7M9TI1QCZH8FPSn+kONH4fU@lists.infradead.org X-Gm-Message-State: AOJu0YxYH+Sv+KFm81Nxe8m2yEijsAgxJzLfEv9kFWdlnV+Ir1iLC6xM umI/vaQrcs1eOjCuDzpocj4jhoQxrW14ivOh+mPHl33bM/kADBmnSLv8UocyLOFJ133RbQgtbto Q6wuMLcU1qZkPuPWRMEOPJodoxru8kLm66GJ2LVu6krfaeQuuvLdNFXw= X-Google-Smtp-Source: AGHT+IEo/gBB6Z3EvY/aSebg/v7nc7SfDVoh8UEhSG+V2dah+ai8npQMCnTeeQSpJAko6xxp4KECSY6Ry+SM2um66q1qnkQOzkky MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20e4:b0:3a7:1f72:ad3c with SMTP id e9e14a558f8ab-3c2d514ff8cmr142680225ab.19.1735094304837; Tue, 24 Dec 2024 18:38:24 -0800 (PST) Date: Tue, 24 Dec 2024 18:38:24 -0800 In-Reply-To: <67627b39.050a0220.29fcd0.0087.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <676b7020.050a0220.226966.0061.GAE@google.com> Subject: Re: [syzbot] [nvme?] KASAN: slab-out-of-bounds Read in nvmet_root_discovery_nqn_show From: syzbot To: dvyukov@google.com, hch@lst.de, kch@nvidia.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, sagi@grimberg.me, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241224_183826_833678_701F10BE X-CRM114-Status: UNSURE ( 7.37 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org syzbot has found a reproducer for the following issue on: HEAD commit: 9b2ffa6148b1 Merge tag 'mtd/fixes-for-6.13-rc5' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12a26adf980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c078001e66e4a17e dashboard link: https://syzkaller.appspot.com/bug?extid=a84181c81389771eb46a compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=109800b0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162422f8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c1d66e09941d/disk-9b2ffa61.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8aa24ea0a81d/vmlinux-9b2ffa61.xz kernel image: https://storage.googleapis.com/syzbot-assets/0d9c0b1e880a/bzImage-9b2ffa61.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a84181c81389771eb46a@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:646 [inline] BUG: KASAN: slab-out-of-bounds in string+0x398/0x3d0 lib/vsprintf.c:728 Read of size 1 at addr ffff8880263c0b25 by task syz-executor329/5823 CPU: 0 UID: 0 PID: 5823 Comm: syz-executor329 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 string_nocheck lib/vsprintf.c:646 [inline] string+0x398/0x3d0 lib/vsprintf.c:728 vsnprintf+0xc67/0x1870 lib/vsprintf.c:2848 snprintf+0xc8/0x100 lib/vsprintf.c:2983 nvmet_root_discovery_nqn_show+0x69/0x90 drivers/nvme/target/configfs.c:2250 fill_read_buffer fs/configfs/file.c:68 [inline] configfs_read_iter+0x40d/0x690 fs/configfs/file.c:88 __kernel_read+0x3f1/0xb50 fs/read_write.c:523 integrity_kernel_read+0x7f/0xb0 security/integrity/iint.c:28 ima_calc_file_hash_tfm+0x2c9/0x3e0 security/integrity/ima/ima_crypto.c:480 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x8a7/0xa10 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_check+0xc6/0x110 security/integrity/ima/ima_main.c:572 security_file_post_open+0x8e/0x210 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x1419/0x2d60 fs/namei.c:3987 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f733fa0ca79 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc342ba758 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f733fa0ca79 RDX: 0000000000189002 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 000000000000fe6f R08: 0000000000000006 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc342ba76c R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 The buggy address belongs to the object at ffff8880263c0b00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of allocated 37-byte region [ffff8880263c0b00, ffff8880263c0b25) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880263c0300 pfn:0x263c0 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801ac418c0 ffffea0000ba8cd0 ffffea0000a178d0 raw: ffff8880263c0300 000000000020001f 00000001f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 35, tgid 35 (kworker/u8:2), ts 8598107284, free_ts 8552526219 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xce2/0x1650 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __kmalloc_cache_noprof+0xf6/0x420 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] percpu_ref_init+0xd9/0x400 lib/percpu-refcount.c:76 blk_alloc_queue+0x578/0x710 block/blk-core.c:447 blk_mq_alloc_queue+0x1a6/0x2e0 block/blk-mq.c:4339 scsi_alloc_sdev+0x890/0xd80 drivers/scsi/scsi_scan.c:337 scsi_probe_and_add_lun+0x789/0xda0 drivers/scsi/scsi_scan.c:1210 __scsi_scan_target+0x1ea/0x580 drivers/scsi/scsi_scan.c:1757 scsi_scan_channel drivers/scsi/scsi_scan.c:1845 [inline] scsi_scan_channel+0x149/0x1e0 drivers/scsi/scsi_scan.c:1821 scsi_scan_host_selected+0x302/0x400 drivers/scsi/scsi_scan.c:1874 page last free pid 57 tgid 57 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0x1080 mm/page_alloc.c:2659 vfree+0x174/0x950 mm/vmalloc.c:3383 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3303 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff8880263c0a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880263c0a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880263c0b00: 00 00 00 00 05 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880263c0b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880263c0c00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ================================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.