From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (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 BCEE72A1D1 for ; Sun, 30 Mar 2025 08:27:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743323248; cv=none; b=VZIzUBEFDJbbhSHgr39PJNL8VsdUh7T1pUJs1Ote5gvyso9Jnfr8T54qEdDYMpcuYD/s7hZgk+86YvCdr++TSYK7NesMT4mU9u7xOPaDZ8L95X/A/IJiQz8hOc4LeqjIZM8ql90d4XLgH/jB3gvbnb/+GUfnwHZAD8MtUZdxrRk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743323248; c=relaxed/simple; bh=i5qsuuDAOBsXN2syyZbmDGo6Y6hote6MFwpxKHZ80dU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3c85:b0:3d3:de8a:630e with SMTP id e9e14a558f8ab-3d5e09f7a73mr46551685ab.16.1743323245904; Sun, 30 Mar 2025 01:27:25 -0700 (PDT) Date: Sun, 30 Mar 2025 01:27:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67e9006d.050a0220.1547ec.0097.GAE@google.com> Subject: [syzbot] [afs?] WARNING: ODEBUG bug in delete_node (3) From: syzbot To: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, marc.dionne@auristor.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2df0c02dab82 x86 boot build: make git ignore stale 'tools'.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=14e3aa4c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5f1762820c18874b dashboard link: https://syzkaller.appspot.com/bug?extid=ab13429207fe1c8c92e8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12985804580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1749a198580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/93b59f97f896/disk-2df0c02d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f0ade1042ab8/vmlinux-2df0c02d.xz kernel image: https://storage.googleapis.com/syzbot-assets/7c64e746afbb/bzImage-2df0c02d.xz The issue was bisected to: commit e2c2cb8ef07affd9f69497ea128fa801240fdf32 Author: David Howells Date: Mon Feb 24 16:06:03 2025 +0000 afs: Simplify cell record handling bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15f1e198580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=17f1e198580000 console output: https://syzkaller.appspot.com/x/log.txt?x=13f1e198580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ab13429207fe1c8c92e8@syzkaller.appspotmail.com Fixes: e2c2cb8ef07a ("afs: Simplify cell record handling") ------------[ cut here ]------------ ODEBUG: activate active (active state 1) object: ffff888025e8e118 object type: rcu_head hint: 0x0 WARNING: CPU: 1 PID: 5839 at lib/debugobjects.c:615 debug_print_object+0x17a/0x1f0 lib/debugobjects.c:612 Modules linked in: CPU: 1 UID: 0 PID: 5839 Comm: strace-static-x Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:debug_print_object+0x17a/0x1f0 lib/debugobjects.c:612 Code: e8 8b a3 2d fd 4c 8b 0b 48 c7 c7 40 24 80 8c 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f8 ff 34 24 e8 5b 2a 87 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 48 c6 40 0b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc90000a08838 EFLAGS: 00010282 RAX: bc12de5074ab4600 RBX: ffffffff8c2bc520 RCX: ffff88802edfda00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8c8025c0 R08: ffffffff81826ce2 R09: fffffbfff1d3a71c R10: dffffc0000000000 R11: fffffbfff1d3a71c R12: 0000000000000001 R13: ffffffff8c8024d8 R14: dffffc0000000000 R15: ffff888025e8e118 FS: 00000000101f03c0(0000) GS:ffff88812535a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555db2c838 CR3: 000000007bba6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_activate+0x350/0x5c0 lib/debugobjects.c:842 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline] __call_rcu_common kernel/rcu/tree.c:3067 [inline] call_rcu+0x99/0xad0 kernel/rcu/tree.c:3202 radix_tree_node_free lib/radix-tree.c:310 [inline] delete_node+0x1b2/0x780 lib/radix-tree.c:573 radix_tree_delete_item+0x2e6/0x3f0 lib/radix-tree.c:1430 afs_cell_destroy+0x175/0x2c0 fs/afs/cell.c:522 rcu_do_batch kernel/rcu/tree.c:2568 [inline] rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2824 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline] RIP: 0010:rcu_is_watching+0x9/0xb0 kernel/rcu/tree.c:735 Code: 03 eb cd 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 <65> ff 05 f0 cc 93 11 e8 6b 3a 6a 0a 89 c3 83 f8 08 73 7a 49 bf 00 RSP: 0018:ffffc90003fc78c8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880591cbc00 RCX: ffff88802edfda00 RDX: ffff88802edfda00 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff818c7bf9 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff933c6020 R14: ffffffff818c7bc8 R15: 0000000000000000 rcu_read_lock include/linux/rcupdate.h:842 [inline] __task_pid_nr_ns+0x62/0x460 kernel/pid.c:518 task_pid_vnr include/linux/pid.h:242 [inline] wait_task_stopped kernel/exit.c:1359 [inline] wait_consider_task+0x1fab/0x30e0 kernel/exit.c:1529 ptrace_do_wait kernel/exit.c:1569 [inline] __do_wait+0x205/0x850 kernel/exit.c:1677 do_wait+0x1e9/0x550 kernel/exit.c:1707 kernel_wait4+0x2ac/0x3c0 kernel/exit.c:1866 __do_sys_wait4 kernel/exit.c:1894 [inline] __se_sys_wait4 kernel/exit.c:1890 [inline] __x64_sys_wait4+0x136/0x1e0 kernel/exit.c:1890 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x4d6ad6 Code: 00 00 00 90 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 RSP: 002b:00007ffeafb16778 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004d6ad6 RDX: 0000000040000000 RSI: 00007ffeafb1679c RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000017 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000101f8f40 R13: 00007ffeafb1679c R14: 00000000101f28b0 R15: 000000000063f160 ---------------- Code disassembly (best guess): 0: 03 eb add %ebx,%ebp 2: cd 66 int $0x66 4: 66 66 66 66 2e 0f 1f data16 data16 data16 cs nopw 0x0(%rax,%rax,1) b: 84 00 00 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: f3 0f 1e fa endbr64 25: 41 57 push %r15 27: 41 56 push %r14 29: 53 push %rbx * 2a: 65 ff 05 f0 cc 93 11 incl %gs:0x1193ccf0(%rip) # 0x1193cd21 <-- trapping instruction 31: e8 6b 3a 6a 0a call 0xa6a3aa1 36: 89 c3 mov %eax,%ebx 38: 83 f8 08 cmp $0x8,%eax 3b: 73 7a jae 0xb7 3d: 49 rex.WB 3e: bf .byte 0xbf --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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