From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f69.google.com (mail-ot1-f69.google.com [209.85.210.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3ADD135E929 for ; Sun, 11 Oct 2026 19:24:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791746667; cv=none; b=AwWMrwyvIHns83h5GXNFBWZ/BCsSP7JKz2qyXb3PgAZpzHovG39jXm5a8Vo7pCJoZxRarmd/pW3qtU3dstMDZV4kxAdbUWqGV8OJ0nsJMoJytsGM9NOdbshMyke1UMvKwIVHLsf0BpwyqeO3SEwpe1S2U1OSB8HOR3Wl7QxMeZs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791746667; c=relaxed/simple; bh=wpYc3lbbpqid/00g/0ScDAWXCp0HRT4O4CEe5wgLaHc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=NnVZpM+QhS9GffJpL6Ugwnn8XkLxaUiIcu2ZvNlGpnYelRLbtsgdGC6+V560fQXmbnTe4dvgbutmyvbvrNvjRuJErpGkkSFnWweTgu4d/FxtGCd7kLgX/73JGpt+wyfIoeysvigfiBVTQ3Jq+o39x6g7GhW0suzgWJrMIkip98M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.210.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-ot1-f69.google.com with SMTP id 46e09a7af769-81447a16061so4295031a34.3 for ; Sun, 11 Oct 2026 12:24:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791746664; x=1792351464; h=content-type:cc:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=FWl80TccLNk2610N0Xq751vCiHR/5oCRZPlaW3S7xE0=; b=J6zvLmvT/A2Mi9Zf3OYxHSlo9MAqaSzIV0zr+JgI+VC8qMA7RVnf8Mxy2JpUDfrz0i IZ6nnj05y0XKiXcE9lItwb3dFFhFTTKOP80cT3L+PPcb4KOECE2T9IHvIG+OmZ26n103 v/JmoTW05qb9lS+Ym+EOCxumnYHsEWJgMIuYwXUnuzLI+i31OwUpXXoGMkTxmKGO1p// nuic0Fuw4NvLZdil1bcLBtm9bwiSIa7AjeOWDp5MIXDrE9gxnYcSP/C1zO91nwKSLsEM 2ouv/Zd04wM9HjeOzTR9v2IdNnfpINrtPG+BTukUFa1qud/fEV5RsCieTqY1SPJVLMHb NuFA== X-Gm-Message-State: AFq9FYIN7EV4rdTr+W2FLDVPi95qSIf/31J3dLpIfAYBUSWddrjgikrh SeIheatOrylb2nYCiY2rnadnZ+URsV4JhERRsp/WXBy0SnUlSEDacr5dummXkKNKzDgzq/o++eH uLO+6CIlq6dzJ3iDcUHIGqI/zN34d5EETAW2DyV1AM3rvnBh5kxm2lKRqy1c= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:bd3:b0:4d6:93c3:3e90 with SMTP id 5614622812f47-50c5bf0c2e4mr6824743b6e.67.1791746664193; Sun, 11 Oct 2026 12:24:24 -0700 (PDT) Date: Sun, 11 Oct 2026 12:24:24 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6acbe268.8cdf6287.1eb53.00ed.GAE@google.com> Subject: [syzbot ci] Re: loop: Detect write requests that failed to wait for completion. From: syzbot ci To: axboe@kernel.dk, bvanassche@acm.org, eadavis@qq.com, hch@lst.de, jfs-discussion@lists.sourceforge.net, linux-block@vger.kernel.org, nilay@linux.ibm.com, penguin-kernel@i-love.sakura.ne.jp, shaggy@kernel.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v3] loop: Detect write requests that failed to wait for completion. https://lore.kernel.org/all/cc2910d3-3113-44d4-94ef-0c8d365fac9c@I-love.SAKURA.ne.jp * [PATCH v3] loop: Detect write requests that failed to wait for completion. and found the following issues: * BUG: found I/O issued by syz.NUM.NUM/NUM but loop0 is no longer bound. * BUG: found I/O issued by syz.NUM.NUM/NUM but loop2 is no longer bound. Full report is available here: https://ci.syzbot.org/series/d3a0b036-fd1e-44c6-8869-386ea1642385 *** BUG: found I/O issued by syz.NUM.NUM/NUM but loop0 is no longer bound. tree: axboe URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux.git base: 4da93acb4f2ed06640255ad98801d0f0c734ff07 arch: amd64 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/a23afb97-88bb-4fba-8885-d3062b5890e2/config syz repro: https://ci.syzbot.org/findings/c9ad5ff9-784f-4528-805f-7971e0359600/syz_repro BUG: found I/O issued by syz.0.760/7647 but loop0 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.0.760/7647 but loop0 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f *** BUG: found I/O issued by syz.NUM.NUM/NUM but loop2 is no longer bound. tree: axboe URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux.git base: 4da93acb4f2ed06640255ad98801d0f0c734ff07 arch: amd64 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/a23afb97-88bb-4fba-8885-d3062b5890e2/config syz repro: https://ci.syzbot.org/findings/bad9ae98-7887-4209-8226-7e84bb070faa/syz_repro BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound. Call Trace: loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922 __blk_mq_issue_directly block/blk-mq.c:2708 [inline] blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768 blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220 __submit_bio_noacct_mq block/blk-core.c:756 [inline] submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790 bh_submit fs/buffer.c:1146 [inline] __bh_read fs/buffer.c:2943 [inline] bh_readahead include/linux/buffer_head.h:437 [inline] __breadahead+0x15c/0x1f0 fs/buffer.c:1359 nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891 load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259 nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073 nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported.