From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (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 39955172786 for ; Tue, 25 Jun 2024 17:13:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719335602; cv=none; b=YGZTOodG4XmJFkIZQbqZEyqzIeDkfnm/xE/2no21g+z9rpONut3te0tT0AmEslg85iakCGaNfx8tm3+Kxbuz+lWl9qvLfbs408j5nrn6KB0EM0LKIIXpUMrRtWDAuswdvQzQvzvck86TjzdA85msTaMDWT7tatNizrtIVNmGh74= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719335602; c=relaxed/simple; bh=SwA6L18jVnsQnP5oylGcLVnYuhMpZRsgDXJMb7sAShg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bjsQKFhl/wCkG1veyY/4k8TlipT5PTYlKXZXNt5P/Cl0D/tdohyi661HYcjsQBtlAYNpGvS3M6nBxoFgfKfwDl4scohumuZt32cDGI+5mfcZOpQJARlP1uhQU/WnDWE9Cd39GOGMkwxpCl3wBctIh6SVnSE5zqrmnMgkXFJ1l7E= 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=209.85.166.78 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-io1-f78.google.com with SMTP id ca18e2360f4ac-7eb1d659c76so781820739f.0 for ; Tue, 25 Jun 2024 10:13:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719335600; x=1719940400; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=66Kmmjskmo4ThUWDPQshbHLXKPhwsOZMZT3UJK7tO44=; b=fbjfHRkBEagOrGcrx/K0bKlJgsFE/T7JIiw30GNLIurJyORrMuaRFjML1qL+pNbzC7 u5WwZvcKF59JxJnu1ZqTjL+XZzfT1LXM/Vja/rTDkmuybNIeE6UOk5ANpvkTXyY70eeF 2xmkRzd3uPf8N0LOt0RQRumzBn0Pd5f9rPgQePdCABoiR+Mw5/XuNbTqmU5CsyVTYhG/ rrocTmgFTo4apMUvRgkxxVF52VVF4txZnscI6fj3pdsge3naw8HPbUimBSeJJHkHyJLh CMVanIt9b5ISByu2v6BsrqpM7QAb4UCpOOfdDRPgcWWlf6eYflsMAfYdFfrvKY5ooLZg A1ag== X-Forwarded-Encrypted: i=1; AJvYcCVhdXqkXIV5Id6Lu7bEB25fviFMRdGkak/usUppPypvUF9Elal4X21Ny7vWFV4KSCn8xuN8OKhf/FycBlbkNgtW90oVG4uuonw8hN4SiaQ= X-Gm-Message-State: AOJu0YzZUxocfe86nlgXcgtU9I1tKWoaC7mW55usqUOvR9j+svwprtLT A0vZzXiarYLm03Ypo0PgV/bx+wlouwW2DQRwfnIhKexky3RlMp19nHhrUACp1Ig7fUXghurCPho LF7uhI7UaJXj8aG7K1112Dtjlf0o0C+mdcPm1ZBHOPoeHLZzKjn3HEH8= X-Google-Smtp-Source: AGHT+IF678WmByhJxCl8VeB0CE622WNItxdmTPkKZleV/fX3UFFXiPFRTZBnUJpQ/+hSPD4DnlY2J97Ngw8XjXT6T7VN6z/vO9Xq Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:1688:b0:4b9:32f8:574f with SMTP id 8926c6da1cb9f-4b9ed085e63mr562975173.5.1719335600372; Tue, 25 Jun 2024 10:13:20 -0700 (PDT) Date: Tue, 25 Jun 2024 10:13:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b5c648061bba03cd@google.com> Subject: [syzbot] [bcachefs?] KASAN: slab-use-after-free Read in bch2_sb_errors_from_cpu From: syzbot To: bfoster@redhat.com, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 66cc544fd75c Merge tag 'dmaengine-fix-6.10' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a7e5ea980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3820d4fff43c7a3 dashboard link: https://syzkaller.appspot.com/bug?extid=a2bc0e838efd7663f4d9 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=107ed151980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1765c589980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-66cc544f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/be894c048296/vmlinux-66cc544f.xz kernel image: https://storage.googleapis.com/syzbot-assets/edc3f9fbd3ca/bzImage-66cc544f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/3d5362aaefc3/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a2bc0e838efd7663f4d9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in bch2_sb_errors_from_cpu+0x255/0x280 fs/bcachefs/sb-errors.c:122 Read of size 8 at addr ffff88801ac73100 by task kworker/u32:2/45 CPU: 3 PID: 45 Comm: kworker/u32:2 Not tainted 6.10.0-rc4-syzkaller-00164-g66cc544fd75c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: btree_update btree_interior_update_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 bch2_sb_errors_from_cpu+0x255/0x280 fs/bcachefs/sb-errors.c:122 bch2_write_super+0x12b2/0x37a0 fs/bcachefs/super-io.c:969 btree_update_new_nodes_mark_sb fs/bcachefs/btree_update_interior.c:626 [inline] btree_update_nodes_written fs/bcachefs/btree_update_interior.c:688 [inline] btree_interior_update_work+0x46e/0x2cb0 fs/bcachefs/btree_update_interior.c:859 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 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 Allocated by task 5596: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4122 [inline] __kmalloc_node_noprof+0x215/0x440 mm/slub.c:4129 kmalloc_node_noprof include/linux/slab.h:681 [inline] kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:634 kvmalloc_array_node_noprof include/linux/slab.h:800 [inline] __bch2_darray_resize+0xd8/0x250 fs/bcachefs/darray.c:12 __darray_resize fs/bcachefs/darray.h:31 [inline] __darray_make_room fs/bcachefs/darray.h:43 [inline] bch2_sb_error_count+0x34f/0x4e0 fs/bcachefs/sb-errors.c:102 __bch2_inode_invalid+0x2c6/0x4d0 fs/bcachefs/inode.c:441 bch2_inode_v3_invalid+0x1f1/0x2e0 fs/bcachefs/inode.c:529 bch2_bkey_val_invalid+0x222/0x2f0 fs/bcachefs/bkey_methods.c:143 bch2_btree_node_read_done+0x3294/0x4fe0 fs/bcachefs/btree_io.c:1232 btree_node_read_work+0x567/0x1060 fs/bcachefs/btree_io.c:1345 bch2_btree_node_read+0x8b3/0xe40 fs/bcachefs/btree_io.c:1730 __bch2_btree_root_read fs/bcachefs/btree_io.c:1769 [inline] bch2_btree_root_read+0x2ca/0x690 fs/bcachefs/btree_io.c:1793 read_btree_roots fs/bcachefs/recovery.c:475 [inline] bch2_fs_recovery+0x1ba8/0x3db0 fs/bcachefs/recovery.c:803 bch2_fs_start+0x2e9/0x600 fs/bcachefs/super.c:1035 bch2_fs_open+0xfa0/0x1110 fs/bcachefs/super.c:2127 bch2_mount+0xe2c/0x1230 fs/bcachefs/fs.c:1919 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 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 Freed by task 5596: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kfree+0x12a/0x3b0 mm/slub.c:4558 kvfree+0x47/0x50 mm/util.c:680 __bch2_darray_resize+0x185/0x250 fs/bcachefs/darray.c:18 __darray_resize fs/bcachefs/darray.h:31 [inline] __darray_make_room fs/bcachefs/darray.h:43 [inline] bch2_sb_error_count+0x34f/0x4e0 fs/bcachefs/sb-errors.c:102 bch2_fsck_err+0x180/0x1730 fs/bcachefs/error.c:210 bch2_bucket_ref_update+0xcd3/0xf80 fs/bcachefs/buckets.c:834 __mark_pointer+0x10c/0x410 fs/bcachefs/buckets.c:1000 bch2_trigger_pointer.constprop.0+0xce4/0x25c0 fs/bcachefs/buckets.c:1037 __trigger_extent+0x414/0xc00 fs/bcachefs/buckets.c:1176 bch2_trigger_extent+0x4ee/0x5d0 fs/bcachefs/buckets.c:1261 bch2_key_trigger fs/bcachefs/bkey_methods.h:88 [inline] bch2_key_trigger_new fs/bcachefs/bkey_methods.h:116 [inline] run_one_trans_trigger fs/bcachefs/btree_trans_commit.c:517 [inline] run_btree_triggers+0x6f1/0xd10 fs/bcachefs/btree_trans_commit.c:544 bch2_trans_commit_run_triggers fs/bcachefs/btree_trans_commit.c:576 [inline] __bch2_trans_commit+0x366/0x7ad0 fs/bcachefs/btree_trans_commit.c:1022 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline] bch2_extent_update+0x494/0xa40 fs/bcachefs/io_write.c:326 bch2_fpunch_at+0x7e6/0xbc0 fs/bcachefs/io_misc.c:184 __bch2_resume_logged_op_truncate+0x4ce/0x7a0 fs/bcachefs/io_misc.c:260 bch2_truncate+0x1e1/0x220 fs/bcachefs/io_misc.c:291 bchfs_truncate+0x90c/0xd70 fs/bcachefs/fs-io.c:476 bch2_setattr+0x1ab/0x250 fs/bcachefs/fs.c:918 notify_change+0x742/0x11f0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 vfs_truncate+0x3ef/0x4e0 fs/open.c:111 do_sys_truncate fs/open.c:134 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x177/0x1f0 fs/open.c:144 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 The buggy address belongs to the object at ffff88801ac73100 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of freed 16-byte region [ffff88801ac73100, ffff88801ac73110) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac73 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000000 ffff888015442640 ffffea0000675400 dead000000000002 raw: 0000000000000000 0000000000800080 00000001ffffefff 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (init), ts 23767929677, free_ts 22379130869 create_dummy_stack mm/page_owner.c:94 [inline] register_dummy_stack+0x8a/0xd0 mm/page_owner.c:100 init_page_owner+0x48/0xbf0 mm/page_owner.c:118 invoke_init_callbacks mm/page_ext.c:148 [inline] page_ext_init+0x6af/0xaa0 mm/page_ext.c:493 mm_core_init+0x68d/0x740 mm/mm_init.c:2725 page last free pid 8 tgid 8 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583 vfree+0x181/0x7a0 mm/vmalloc.c:3346 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3267 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 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: ffff88801ac73000: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff88801ac73080: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc >ffff88801ac73100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ^ ffff88801ac73180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff88801ac73200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup