From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 E82661D89EF for ; Tue, 11 Aug 2026 00:12:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786407149; cv=none; b=JRY6pDRBDf3gnO5nRvlMksNqMy1NxKz3lRH1k3Oe5/RaEHnpWIIT3upVOjTaUMef7NbrV9TJgnbKr6zKLbJz/ak+bzbBuEEGiGNEEQqUWLi4c7miziwpvuQEnq6oBZN6OHHQLcQ5ZhRw6RRr/paeT1MsHr9+xPXfZzfpHXoEvbY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786407149; c=relaxed/simple; bh=fMAMu8Pbg4vK3SAahWljnYKkSfWlnnDfHXITbkn3rF4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=fVWXlCI4IGBnNybzGz/J3JEHRl7mKnsExYEONqz8vRoF5HHBNS2RO4vJraJRPT8Rf+FIyIVbbmDrU0PwWrSF3mkgDiMm2yBCNsU2lKSyZpP+EumTKGz1CebeVuf3vKxODr+iCBCFD+pzcKF5KNhtlhKOtXVDTTWqhNU9RdPdfRs= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-6ae4622d842so1913769eaf.3 for ; Mon, 10 Aug 2026 17:12:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786407147; x=1787011947; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=wK9kvsOWODvgjuPDmjY0aeFJRUxWIPVvNgbeBKxFK8A=; b=cseCeSavK9o1ubknbzTT1k0nPVHYabuEDLQDaRKQdw+lRq0QC4rBRf4yfCrDJZNz+X 1vyZQgnBFbis8yULoaWoQP+s9B8lSqQANpo+1yxD8pH1uYZXyUcTx9dSVJ/KmurX8FJI Of1ZrfGgCfyefq0cdAr9sdx8koRCEGjc50poX9LVpZgcvvszreduykAZIrMb3WdsRAnm ceMa5XRTKzhesEfhAWnRoXgS/GwXGumr3siaFBSP5PpFckXh6Yfimg78d+dNk1L0rj6h BRIBgAMoFHVx7T1dwW0pjMEcmiv7D85OG75jZsgMVIdk36D9Yo5fV2Hq+pDGynl5vwO8 e5Ow== X-Forwarded-Encrypted: i=1; AHgh+RocGOkMR4h3gvou1YZe/1M48HAyMPw07nW7g8QudrY3MtrCAn/uXtAqIn8dTT9GIZs/oy4QDWc2WxGpaPI=@vger.kernel.org X-Gm-Message-State: AOJu0YyuN6zjT73JEabt81O7pSZakzGCijRL3rTwTF0EpY2ulhNYw1cG 8WEBkSRL5HZe9d/wPmqJy3PDMD4khuBghuTUofnK7CAScfc/QTNcLTKXjJ3WJuAmLFABMfFqVKg +1LCd6msYZZ3SVJCY65Xl/xRUQQ1KQY4KJIgGPgA7TfYt37TCVLMTNlxZpfU= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:178c:b0:6ac:b1ae:6ce2 with SMTP id 006d021491bc7-6b04210f78cmr12774126eaf.24.1786407146791; Mon, 10 Aug 2026 17:12:26 -0700 (PDT) Date: Mon, 10 Aug 2026 17:12:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7a68ea.9c11d2ce.289b96.00f3.GAE@google.com> Subject: [syzbot] [x25?] inconsistent lock state in valid_state (7) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-x25@vger.kernel.org, ms@dev.tdt.de, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3d08ff75a47a Add linux-next specific files for 20260810 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1635e079580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5ba0556605934602 dashboard link: https://syzkaller.appspot.com/bug?extid=15cbd86f569e8b084383 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/227afac921c2/disk-3d08ff75.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/236f7cfe0ac3/vmlinux-3d08ff75.xz kernel image: https://storage.googleapis.com/syzbot-assets/aea89831fd96/bzImage-3d08ff75.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+15cbd86f569e8b084383@syzkaller.appspotmail.com ================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.1.151/6419 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807ca06260 (sk_lock-AF_X25){+.?.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline] ffff88807ca06260 (sk_lock-AF_X25){+.?.}-{0:0}, at: x25_kill_by_neigh+0x10d/0x250 net/x25/af_x25.c:1778 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908 lock_sock_nested+0x41/0x100 net/core/sock.c:3827 lock_sock include/net/sock.h:1713 [inline] x25_bind+0x209/0x450 net/x25/af_x25.c:694 __sys_bind_socket net/socket.c:1945 [inline] __sys_bind+0x2e3/0x410 net/socket.c:1976 __do_sys_bind net/socket.c:1981 [inline] __se_sys_bind net/socket.c:1979 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1979 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 47158 hardirqs last enabled at (47158): [] __local_bh_enable_ip+0xd0/0x130 kernel/softirq.c:457 hardirqs last disabled at (47157): [] __local_bh_enable_ip+0x71/0x130 kernel/softirq.c:434 softirqs last enabled at (47068): [] __do_softirq kernel/softirq.c:658 [inline] softirqs last enabled at (47068): [] invoke_softirq kernel/softirq.c:498 [inline] softirqs last enabled at (47068): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:737 softirqs last disabled at (47113): [] __do_softirq kernel/softirq.c:658 [inline] softirqs last disabled at (47113): [] invoke_softirq kernel/softirq.c:498 [inline] softirqs last disabled at (47113): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:737 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_X25); lock(sk_lock-AF_X25); *** DEADLOCK *** locks held by syz.1.151/6419: 1, last CPU#1: #0: ffffffff8eb5c820 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffffffff8eb5c820 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8eb5c820 (rcu_read_lock){....}-{1:3}, at: netif_receive_skb_core+0x33/0x2b0 net/core/dev.c:6269 stack backtrace: CPU: 1 UID: 0 PID: 6419 Comm: syz.1.151 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_usage_bug+0x28b/0x2e0 kernel/locking/lockdep.c:4058 valid_state+0xbe/0xf0 kernel/locking/lockdep.c:4072 mark_lock_irq+0x36/0x380 kernel/locking/lockdep.c:4283 mark_lock+0x117/0x190 kernel/locking/lockdep.c:4769 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0x6b7/0x2e50 kernel/locking/lockdep.c:5208 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908 lock_sock_nested+0x41/0x100 net/core/sock.c:3827 lock_sock include/net/sock.h:1713 [inline] x25_kill_by_neigh+0x10d/0x250 net/x25/af_x25.c:1778 x25_lapb_receive_frame+0x1b0/0xfb0 net/x25/x25_dev.c:138 __netif_receive_skb_one_core net/core/dev.c:6245 [inline] netif_receive_skb_core+0x2a6/0x2b0 net/core/dev.c:6270 lapbeth_napi_poll+0x42/0x90 drivers/net/wan/lapbether.c:100 __napi_poll+0xaa/0x330 net/core/dev.c:7768 napi_poll net/core/dev.c:7831 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:7988 handle_softirqs+0x225/0x840 kernel/softirq.c:624 __do_softirq kernel/softirq.c:658 [inline] invoke_softirq kernel/softirq.c:498 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:737 irq_exit_rcu+0x9/0x30 kernel/softirq.c:754 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:finish_task_switch+0x417/0xc60 kernel/sched/core.c:5361 Code: 04 00 00 41 c7 84 24 20 0e 00 00 00 00 00 00 e9 d5 06 00 00 49 83 c4 48 4c 89 e7 e8 33 c4 47 0a e8 9e e4 39 00 fb 4c 8b 65 c8 <49> 8d bc 24 10 17 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 RSP: 0018:ffffc9000da5f260 EFLAGS: 00000202 RAX: 000000000000b807 RBX: ffff8880b873ca60 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8e25543f RDI: ffffffff8c4c8980 RBP: ffffc9000da5f2b0 R08: ffffffff9058fd7f R09: 1ffffffff20b1faf R10: dffffc0000000000 R11: fffffbfff20b1fb0 R12: ffff88803040ddc0 R13: ffff88803040ddc0 R14: dffffc0000000000 R15: 1ffff110170e794c context_switch kernel/sched/core.c:5513 [inline] __schedule+0x1b32/0x59a0 kernel/sched/core.c:7232 __schedule_loop kernel/sched/core.c:7309 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7324 schedule_timeout+0xc0/0x2c0 kernel/time/sleep_timeout.c:75 unix_wait_for_peer+0x1f5/0x2f0 net/unix/af_unix.c:1616 unix_dgram_sendmsg+0xaf4/0x17b0 net/unix/af_unix.c:2252 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2709 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2763 __sys_sendmmsg+0x273/0x4d0 net/socket.c:2852 __do_sys_sendmmsg net/socket.c:2879 [inline] __se_sys_sendmmsg net/socket.c:2876 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2876 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa86c39e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa86d19c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fa86c625fa0 RCX: 00007fa86c39e0d9 RDX: 0400000000000041 RSI: 0000200000000000 RDI: 0000000000000006 RBP: 00007fa86c435024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa86c626038 R14: 00007fa86c625fa0 R15: 00007fff05bd2b28 BUG: sleeping function called from invalid context at net/core/sock.c:3829 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6419, name: syz.1.151 preempt_count: 101, expected: 0 RCU nest depth: 1, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] __schedule_loop kernel/sched/core.c:7308 [inline] [] schedule+0x15d/0x2b0 kernel/sched/core.c:7324 CPU: 1 UID: 0 PID: 6419 Comm: syz.1.151 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x378/0x4d0 kernel/sched/core.c:9195 lock_sock_nested+0x56/0x100 net/core/sock.c:3829 lock_sock include/net/sock.h:1713 [inline] x25_kill_by_neigh+0x10d/0x250 net/x25/af_x25.c:1778 x25_lapb_receive_frame+0x1b0/0xfb0 net/x25/x25_dev.c:138 __netif_receive_skb_one_core net/core/dev.c:6245 [inline] netif_receive_skb_core+0x2a6/0x2b0 net/core/dev.c:6270 lapbeth_napi_poll+0x42/0x90 drivers/net/wan/lapbether.c:100 __napi_poll+0xaa/0x330 net/core/dev.c:7768 napi_poll net/core/dev.c:7831 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:7988 handle_softirqs+0x225/0x840 kernel/softirq.c:624 __do_softirq kernel/softirq.c:658 [inline] invoke_softirq kernel/softirq.c:498 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:737 irq_exit_rcu+0x9/0x30 kernel/softirq.c:754 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:finish_task_switch+0x417/0xc60 kernel/sched/core.c:5361 Code: 04 00 00 41 c7 84 24 20 0e 00 00 00 00 00 00 e9 d5 06 00 00 49 83 c4 48 4c 89 e7 e8 33 c4 47 0a e8 9e e4 39 00 fb 4c 8b 65 c8 <49> 8d bc 24 10 17 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 RSP: 0018:ffffc9000da5f260 EFLAGS: 00000202 RAX: 000000000000b807 RBX: ffff8880b873ca60 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8e25543f RDI: ffffffff8c4c8980 RBP: ffffc9000da5f2b0 R08: ffffffff9058fd7f R09: 1ffffffff20b1faf R10: dffffc0000000000 R11: fffffbfff20b1fb0 R12: ffff88803040ddc0 R13: ffff88803040ddc0 R14: dffffc0000000000 R15: 1ffff110170e794c context_switch kernel/sched/core.c:5513 [inline] __schedule+0x1b32/0x59a0 kernel/sched/core.c:7232 __schedule_loop kernel/sched/core.c:7309 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7324 schedule_timeout+0xc0/0x2c0 kernel/time/sleep_timeout.c:75 unix_wait_for_peer+0x1f5/0x2f0 net/unix/af_unix.c:1616 unix_dgram_sendmsg+0xaf4/0x17b0 net/unix/af_unix.c:2252 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2709 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2763 __sys_sendmmsg+0x273/0x4d0 net/socket.c:2852 __do_sys_sendmmsg net/socket.c:2879 [inline] __se_sys_sendmmsg net/socket.c:2876 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2876 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa86c39e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa86d19c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fa86c625fa0 RCX: 00007fa86c39e0d9 RDX: 0400000000000041 RSI: 0000200000000000 RDI: 0000000000000006 RBP: 00007fa86c435024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa86c626038 R14: 00007fa86c625fa0 R15: 00007fff05bd2b28 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 41 c7 84 24 20 0e 00 movl $0x0,0xe20(%r12) 9: 00 00 00 00 00 e: e9 d5 06 00 00 jmp 0x6e8 13: 49 83 c4 48 add $0x48,%r12 17: 4c 89 e7 mov %r12,%rdi 1a: e8 33 c4 47 0a call 0xa47c452 1f: e8 9e e4 39 00 call 0x39e4c2 24: fb sti 25: 4c 8b 65 c8 mov -0x38(%rbp),%r12 * 29: 49 8d bc 24 10 17 00 lea 0x1710(%r12),%rdi <-- trapping instruction 30: 00 31: 48 89 f8 mov %rdi,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 3d: 84 c0 test %al,%al --- 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