From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 7C0BF12EBCA for ; Mon, 3 Jun 2024 13:05:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717419936; cv=none; b=mZqdH/dCTverndrwBTxuzbpdLoYmtwJrcd0KBf9szrVxTaQAYJuGy3LABrAaol0wWuzm/oei8oE1ZfQwDUM+i0FRzzhgmsA/Y4Vq0o0++evSlMhwnF9hzw8TaM1j6/H3k4JhZaKslxDxQA7CwLGiG0KTkl43Hi3g6cfbhb8PXLE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717419936; c=relaxed/simple; bh=kwXisx3FChpIdq6riPDIHN7Hpyg71rGb5Cy66/vGrUk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=C9gmVXT2tPK9mQ5B2TYPp5dw+cGyZYiccSddFEHEEheSzM914oSmY6SUjTpXPeitz3b7V2Rl7eukzBgNybuH2yGSEhuHh05QnGOp/TKHWxjoCiqhCfcxqABJtmua/7KYTN7k/HZ7oyyWmYHl0VBvD6jYK9khldRBCqtRcnfqGC4= 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=209.85.166.207 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-il1-f207.google.com with SMTP id e9e14a558f8ab-3737b6fc28fso38411895ab.0 for ; Mon, 03 Jun 2024 06:05:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717419933; x=1718024733; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=3In1caMHcBatVDW10Ufogn0gt1LzxAc09r1QBMG0KHs=; b=ny+nMjpEBFLfg/Ig7xsZSgarOP4tUbsnvYgu0ii3MxJMC3yur1lYuH2o1TYJphzuBz 9/c6mlvdyl3IzFPhlOnQ9iBxueVyAIDhTH+EQXJ1OBbPmIHGnW1wTI94rkgKrBTNicWi WFyeQQada+Q/qWS0ijalK3ehPZExtd3AYwSH7KNipJLHMV7dZ5dmVDBN25WUs5Zu1Uca MaeUmqZt7Cf56P8lp8PYaFSolXS9WfPfv/4rK9MlS/P5Y9Ws1zeKIn2WcyMjUhQrH4ft 4p93YzWwgJ8ZQ35tQ+xSt2Nshzq1MGaMr2ajOZmU8ccDi+Y1tsttoQQqwhrF7BNeiXwg f6HA== X-Forwarded-Encrypted: i=1; AJvYcCXPkgR+W0tDLftoJqlSkmwrctaTOGNVqkeoh0l1d4cnv0Os/a0X/g9stEF3LEQZ5RVCaB9HLv5j8DRSEGghD5+UULgLPE1bggmM9HPM X-Gm-Message-State: AOJu0YyzaKbikJDbEFsxNBK4eoRbufjqnqnTKJ1YqYgDN6Kv+/XnaoRb 9gh6jI6iuGlfRcKCfwD4zvmla4KUHcJvCgc+Coxu0RwOTnkaHm331AoNXHIoMaJW0mc3/uNc2lF h/f9lYO4ADM/qnYAaAGjqCh5wIi8QGdj3Kx1z0KqeyDTyUp0iT/VxGZg= X-Google-Smtp-Source: AGHT+IFKN/zN6uKn7iRKWStWfc6K5wFO1iCjkuQtB0/fSIf7gsI1ftXNPrnL8Aoa2I5NOPeWFDkaCGlUEO61kIyLBA7bC6XWGkQp Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:2390:b0:4b5:14e4:3ae with SMTP id 8926c6da1cb9f-4b514e406b3mr444499173.2.1717419933729; Mon, 03 Jun 2024 06:05:33 -0700 (PDT) Date: Mon, 03 Jun 2024 06:05:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001496dc0619fbfdda@google.com> Subject: [syzbot] [bcachefs?] UBSAN: array-index-out-of-bounds in lock_timer_base 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: 83814698cf48 Merge tag 'powerpc-6.10-2' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1654ce06980000 kernel config: https://syzkaller.appspot.com/x/.config?x=733cc7a95171d8e7 dashboard link: https://syzkaller.appspot.com/bug?extid=6a038377f0a594d7d44e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-83814698.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7042fdcb685d/vmlinux-83814698.xz kernel image: https://storage.googleapis.com/syzbot-assets/9f795e13834f/bzImage-83814698.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6a038377f0a594d7d44e@syzkaller.appspotmail.com bcachefs (loop0): shutdown complete, journal seq 18 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in kernel/time/timer.c:962:9 index 24 is out of range for type 'long unsigned int [8]' CPU: 0 PID: 11510 Comm: syz-executor.0 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x110/0x150 lib/ubsan.c:429 get_timer_cpu_base kernel/time/timer.c:962 [inline] get_timer_base kernel/time/timer.c:991 [inline] lock_timer_base+0x206/0x220 kernel/time/timer.c:1050 __try_to_del_timer_sync+0x8d/0x170 kernel/time/timer.c:1506 __timer_delete_sync+0xf4/0x1b0 kernel/time/timer.c:1665 del_timer_sync include/linux/timer.h:185 [inline] cleanup_srcu_struct+0x124/0x520 kernel/rcu/srcutree.c:659 bch2_fs_btree_iter_exit+0x46e/0x630 fs/bcachefs/btree_iter.c:3410 __bch2_fs_free fs/bcachefs/super.c:556 [inline] bch2_fs_release+0x117/0x820 fs/bcachefs/super.c:603 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1fa/0x5b0 lib/kobject.c:737 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72bc579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffba0958 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ffba0a00 RCX: 0000000000000009 RDX: 00000000f7412ff4 RSI: 00000000f7363361 RDI: 00000000ffba1aa4 RBP: 00000000ffba0a00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---[ end trace ]--- ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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