From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 9DEB91BBBD7 for ; Mon, 25 Nov 2024 14:18:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732544318; cv=none; b=XCuUqyHJje0R2//UatRD1UskaDHBKQBe0cZd3mR9gMPLcSfoezLCt4OiVsmCyz1xlIR3RrsMnwWF3gzjjLzzsnl3o1gDPkE0WZrkqlaTJgMn7EsmY1d1Db/MiA4D5wZHf3yTZZOq6cvvz6D3/oOS4xmbRKrRTRlkwxKzSck+L/4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732544318; c=relaxed/simple; bh=0F9jLlx8VVGnwrKnBqn0cWJczvEtWxxfJFJVKn49kFk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=FVSaFrdeNhOcZvK5ofeD9x9Rex0Q140mDqfyNKCaaS/YtozwhoDDH/K4O9WpP7rJ+E4sG0gy9UFhRGUoTpyKO6Ck7dI7kCwuUHQyZU6KBlnu+/HoYEurctHRwVF+gut+D25Z3cusNsr7E3olU16Qgo4w69RIAXoEid+4iTX1GvE= 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=209.85.166.72 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-f72.google.com with SMTP id ca18e2360f4ac-8419f8859f7so75115139f.2 for ; Mon, 25 Nov 2024 06:18:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732544316; x=1733149116; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=IDiYy7syRxYhK+QrHXQlZhY4cYYyDMWsFiHB6gyc3/g=; b=u5dPQ+Uum3wgehqNXlPCan2dl3HFe4rBp/VCIw4sH/rM0bRavNnPgPPahZzig0ZW8I OpHCMY4uVAK3xDn8s3ghXTf5Me6EC5+p54urtN/pi+9Xa9tKWZQCTPk2RzVsmqcIT5ge LOa2BLKxgWKbIgZQ1ORBArlhWuLzcvDKsm+0awrdNdFqgbriolwvFvGcKCgvq+pLlXq0 Eu2RPkfgXu0juABsJ8IuAw5hf9IOfvqmHhpAjKdYycMcsZSlZgMX6uUGLRl6shvaYz/A MZPkgZZ6cEwc9HFligfMp/NR8cYsvPik9bc03QObcKXv/efiJ7Oj+jm4PUv8atoEpTwU xUgw== X-Forwarded-Encrypted: i=1; AJvYcCX7roCyEpyMyuYIljAdAueyWoNEZuVziN6eyJpSHab/OhWyWkb9WKS/VIvMnHezPjpBkMBbDjL78p+B1R/b2g==@vger.kernel.org X-Gm-Message-State: AOJu0YycRDKqSM39vw1skMnJ1zueQ6+lOPbvG6R5+S1/Qf9o9bPMOA9K U1NZQ7rQE4wTVMpqZFdlx8CPZkhbl8mDvqk3LDAP3pLRrzYagpmFGjKMtSQyvFAbBcW5ukglJeo q0KVKzWLATPYF//IJ2OUupsKopE3esWYE+xd5Vvp6S9zB0JUvMXlf/NE= X-Google-Smtp-Source: AGHT+IGcbkyrBGHWuXxkpLyM1iBtg0H+0An4Yl8A7R60SMCNEpdvYzDhF2YQaDuuXxAF/5zb7lgb7Q6NOkXUqIeXb9KPl2bFiTvw Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a62:b0:3a7:6f1c:a084 with SMTP id e9e14a558f8ab-3a79afec520mr151317035ab.23.1732544315784; Mon, 25 Nov 2024 06:18:35 -0800 (PST) Date: Mon, 25 Nov 2024 06:18:35 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6744873b.050a0220.1286eb.0000.GAE@google.com> Subject: [syzbot] [bcachefs?] KASAN: global-out-of-bounds Read in rcu_pending_exit From: syzbot To: 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: 7b1d1d4cfac0 Merge remote-tracking branch 'iommu/arm/smmu'.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=116f6930580000 kernel config: https://syzkaller.appspot.com/x/.config?x=dfe1e340fbee3d16 dashboard link: https://syzkaller.appspot.com/bug?extid=e733ab672a1b6724c27f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/354fe38e2935/disk-7b1d1d4c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f12e0b1ef3fd/vmlinux-7b1d1d4c.xz kernel image: https://storage.googleapis.com/syzbot-assets/291dbc519bb3/Image-7b1d1d4c.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e733ab672a1b6724c27f@syzkaller.appspotmail.com ------------[ cut here ]------------ ================================================================== BUG: KASAN: global-out-of-bounds in string_nocheck lib/vsprintf.c:646 [inline] BUG: KASAN: global-out-of-bounds in string+0x1dc/0x264 lib/vsprintf.c:728 Read of size 1 at addr ffff80008bacf4cb by task syz-executor/6428 CPU: 1 UID: 0 PID: 6428 Comm: syz-executor Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x198/0x538 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 string_nocheck lib/vsprintf.c:646 [inline] string+0x1dc/0x264 lib/vsprintf.c:728 vsnprintf+0xe9c/0x1a8c lib/vsprintf.c:2803 vprintk_store+0x38c/0xd80 kernel/printk/printk.c:2260 vprintk_emit+0x258/0x55c kernel/printk/printk.c:2383 vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2422 vprintk+0x200/0x300 kernel/printk/printk_safe.c:68 __warn_printk+0x2b0/0x484 kernel/panic.c:797 look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 register_lock_class+0x8c/0x6b4 kernel/locking/lockdep.c:1290 __lock_acquire+0x18c/0x77c8 kernel/locking/lockdep.c:5077 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x58/0x70 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] rcu_pending_has_pending_or_armed fs/bcachefs/rcu_pending.c:576 [inline] rcu_pending_exit+0x124/0x660 fs/bcachefs/rcu_pending.c:594 bch2_fs_btree_key_cache_exit+0x7ec/0x8f4 fs/bcachefs/btree_key_cache.c:742 __bch2_fs_free fs/bcachefs/super.c:556 [inline] bch2_fs_release+0x1fc/0x728 fs/bcachefs/super.c:611 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:737 bch2_fs_free+0x2c4/0x334 fs/bcachefs/super.c:673 bch2_kill_sb+0x48/0x58 fs/bcachefs/fs.c:2279 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380 task_work_run+0x230/0x2e0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the variable: .str+0xb/0x20 The buggy address belongs to the virtual mapping at [ffff80008b5d0000, ffff80008f330000) created by: declare_kernel_vmas+0x58/0xb8 arch/arm64/mm/mmu.c:771 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a22cf flags: 0x5ffc00000002000(reserved|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000002000 fffffdffc588b3c8 fffffdffc588b3c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff80008bacf380: 00 f9 f9 f9 00 06 f9 f9 00 00 00 00 f9 f9 f9 f9 ffff80008bacf400: 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 00 00 00 00 >ffff80008bacf480: 00 00 00 00 00 00 00 00 00 01 f9 f9 00 00 00 04 ^ ffff80008bacf500: f9 f9 f9 f9 00 00 00 00 00 00 00 00 00 00 00 00 ffff80008bacf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Looking for class "" with key rcu_pending_init.__key, but found a different class "&p->lock" with the same key WARNING: CPU: 1 PID: 6428 at kernel/locking/lockdep.c:939 look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 Modules linked in: CPU: 1 UID: 0 PID: 6428 Comm: syz-executor Tainted: G B 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 lr : look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 sp : ffff8000a42773e0 x29: ffff8000a42773e0 x28: dfff800000000000 x27: 0000000000000000 x26: ffff8000973468c0 x25: ffff800097346000 x24: 0000000000000001 x23: 0000000000000000 x22: 1ffff00011f040ba x21: ffff8000974ed7c0 x20: fffffdffbf7434b0 x19: ffff800092e7e3c0 x18: 0000000000000008 x17: 20646e756f662074 x16: ffff8000830d1d70 x15: 0000000000000001 x14: 1fffe000366cb0e2 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000003 x10: 0000000000ff0100 x9 : 19ffed0552c97800 x8 : 19ffed0552c97800 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a4276b18 x4 : ffff80008f90d220 x3 : ffff800080626d8c x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000000 Call trace: look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 (P) look_up_lock_class+0xec/0x160 kernel/locking/lockdep.c:936 (L) register_lock_class+0x8c/0x6b4 kernel/locking/lockdep.c:1290 __lock_acquire+0x18c/0x77c8 kernel/locking/lockdep.c:5077 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x58/0x70 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] rcu_pending_has_pending_or_armed fs/bcachefs/rcu_pending.c:576 [inline] rcu_pending_exit+0x124/0x660 fs/bcachefs/rcu_pending.c:594 bch2_fs_btree_key_cache_exit+0x7ec/0x8f4 fs/bcachefs/btree_key_cache.c:742 __bch2_fs_free fs/bcachefs/super.c:556 [inline] bch2_fs_release+0x1fc/0x728 fs/bcachefs/super.c:611 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:737 bch2_fs_free+0x2c4/0x334 fs/bcachefs/super.c:673 bch2_kill_sb+0x48/0x58 fs/bcachefs/fs.c:2279 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380 task_work_run+0x230/0x2e0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 282192 hardirqs last enabled at (282191): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (282191): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (282192): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (282192): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (280764): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (280764): [] handle_softirqs+0xa38/0xbf8 kernel/softirq.c:582 softirqs last disabled at (280725): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 ---[ end trace 0000000000000000 ]--- --- 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 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