From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3A693C55162 for ; Mon, 3 Aug 2026 06:40:39 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 335B76B0088; Mon, 3 Aug 2026 02:40:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2E6A46B0093; Mon, 3 Aug 2026 02:40:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1FD7C6B0095; Mon, 3 Aug 2026 02:40:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id E13EE6B0088 for ; Mon, 3 Aug 2026 02:40:37 -0400 (EDT) Received: from smtpin25.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id EFF15405F6 for ; Mon, 3 Aug 2026 06:40:35 +0000 (UTC) X-FDA: 85059009630.25.76E45D6 Received: from mail-ot1-f77.google.com (mail-ot1-f77.google.com [209.85.210.77]) by imf01.hostedemail.com (Postfix) with ESMTP id 36D9F40009 for ; Mon, 3 Aug 2026 06:40:34 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=none; spf=pass (imf01.hostedemail.com: domain of 34TdwagkbAGwcijUKVVObKZZSN.QYYQVOecObMYXdOXd.MYW@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.210.77 as permitted sender) smtp.mailfrom=34TdwagkbAGwcijUKVVObKZZSN.QYYQVOecObMYXdOXd.MYW@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1785739234; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references; bh=kmLfTeX2LuB648xyXziPrOINmokEfv+YjIM+g9GaVWQ=; b=qelJZSRAlR34tCZj488c/KHgLPF0ZTktYgE9527U7lUEsGjP1AoocmHHTc7NmGqVWm6atj 7hu1Ixsw5Q22w3P62Z3aiYlI4SjmSUQPlo1mo5V6R6GjDC0/fO3fegGpNRze+/ztZLGF9k 38oxWMbwJUUY9YjdQV1sZetGYivvn+0= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785739234; b=GAUMwrHs4Ak3lyijK625oSpQSHZVw9Sz/OR5AdkRoe8f75nlCu2bgkO574dXsNHIpUFisX otEcMHQvz8QQe7KxcNADou3GEtg5gMtWo+xQlgUL6JgOFfabqzUNYlzFXlqt1Y9r+dkDRL uGcd6cTTCQttdzVYxGLUO+U6acj8IY4= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=none; spf=pass (imf01.hostedemail.com: domain of 34TdwagkbAGwcijUKVVObKZZSN.QYYQVOecObMYXdOXd.MYW@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.210.77 as permitted sender) smtp.mailfrom=34TdwagkbAGwcijUKVVObKZZSN.QYYQVOecObMYXdOXd.MYW@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) Received: by mail-ot1-f77.google.com with SMTP id 46e09a7af769-7e9ee20bde0so2066337a34.2 for ; Sun, 02 Aug 2026 23:40:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785739233; x=1786344033; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=kmLfTeX2LuB648xyXziPrOINmokEfv+YjIM+g9GaVWQ=; b=Vy65eRscSoJKGeYaqdmdXYKs5S4W9grH089/6Ywi+Y8rxBaDvZ6QZdyLj3ADuL/3Kv E3Pjx6x2KBtLbNbl57t1pGrzCDvjPuJ+AUDrTMuqIRRzOo4kUz5lSKGatVuV3PP0Ngkm gfj1jgDsf1BIgucJtDvz3L15AduuUtSxPCCkzB8Q0J/ohl4GifcyXKhTWwutUTjJXeoN TxxrAyqm3mSk2I26vr9CynLsy0Tjadl6SDtAA8Es8Xq5odM+QQwzByURUqbfcpMNHstV HyE3eZMb7UkDgk7fQ0b/3NthpBDT0d1SGXXRnTgam0DsoVwIcT5+XF46EoWzIpHNSmGd puLA== X-Forwarded-Encrypted: i=1; AHgh+RozPUjjQLmI3fQ3E7Gr6uND3w3wd6z69vNuHVKiDI50wBOgJcfPmYm4fJ7a1bH/QFE0tD3wt06BCA==@kvack.org X-Gm-Message-State: AOJu0YwPLX34gT6ZO1xK//V4ALEeTpo6evyEtSHYDhnd/7lrB6vnbar1 M4qOwj/9yaldhbj5cBLf6l8GXpchkz6hoeQhYW/oEGzumi4XAD9FrxjemMFS+HgeDwD2s+9QfD5 Jf7LoWPAJYU1VfmJ8GZ5NA9x5sL2/e2t0IJh8ad9pYrl5e5JOboE2N9kL+rc= MIME-Version: 1.0 X-Received: by 2002:a05:6820:1614:b0:6a3:e11b:c44 with SMTP id 006d021491bc7-6ae4320bb54mr12057715eaf.14.1785739233041; Sun, 02 Aug 2026 23:40:33 -0700 (PDT) Date: Sun, 02 Aug 2026 23:40:33 -0700 In-Reply-To: <6a470486.52c20a74.1f8b39.000c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7037e1.2d659fcc.1d46f5.01e6.GAE@google.com> Subject: Re: [syzbot] [mm?] WARNING in update_rq_clock (2) From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, mingo@redhat.com, nogikh@google.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 36D9F40009 X-Stat-Signature: up4ugqrowjh7911bgorpyjci9mqwix4u X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1785739234-130247 X-HE-Meta: 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 +JktlvhZ 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 G4JnpgXw wpi0TJryeDfbLOUo3TzutYsfMxcCVd24GYMLfbKPyBs3jC9TWO7UzBfcky9mJY4ePo9ytrEDcJ81sFFJciycdbyhgtpcPiMzHBjDJh+JD7azlQbt+fYYljYs80xZ1si6R1BPgBv0g5Y+tf4AsYgG9ccSBKlSv4XtF1+Z5acazqyDpGg4XImZmVvGviWoHKFqMfqJA/KwgEQJptG2yaZbXQZPRGdpvpA2UOWTUP27tLZu58Kur1xDAIG5vSTUYjkGjDaxFJ198FsCi201C0e//+mbzYnFHqsgw5axvGqum4s= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has found a reproducer for the following issue on: HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=17122649580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f dashboard link: https://syzkaller.appspot.com/bug?extid=681e729b2cf0d4860042 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11908cc6580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1042ec9e580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+681e729b2cf0d4860042@syzkaller.appspotmail.com ------------[ cut here ]------------ debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0) WARNING: kernel/sched/sched.h:1652 at lockdep_assert_rq_held kernel/sched/sched.h:1652 [inline], CPU#0: syz-executor108/5647 WARNING: kernel/sched/sched.h:1652 at update_rq_clock+0x34d/0x560 kernel/sched/core.c:865, CPU#0: syz-executor108/5647 Modules linked in: CPU: 0 UID: 0 PID: 5647 Comm: syz-executor108 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1652 [inline] RIP: 0010:update_rq_clock+0x34d/0x560 kernel/sched/core.c:865 Code: 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 8b f0 9d 00 4c 01 3b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 85 e6 bf 09 cc 90 <0f> 0b 90 e9 42 fd ff ff 48 89 df 48 83 c4 10 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90004e9f618 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b873b880 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8dbfaa0e RDI: ffffffff8bcbd080 RBP: dffffc0000000000 R08: ffffffff8fd0c47f R09: 1ffffffff1fa188f R10: dffffc0000000000 R11: ffffffff819e4d80 R12: 0000000000000001 R13: dffffc0000000001 R14: ffff8880b873c748 R15: ffff8880b873b880 FS: 00007fb5334a16c0(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5334a0ff8 CR3: 0000000034948000 CR4: 00000000003526f0 Call Trace: pick_next_task kernel/sched/core.c:6335 [inline] __schedule+0x3774/0x5530 kernel/sched/core.c:7146 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7553 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__outb arch/x86/include/asm/shared/io.h:22 [inline] RIP: 0010:rtc_cmos_write+0x13/0x20 arch/x86/kernel/rtc.c:97 Code: 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 89 f3 89 fd e8 51 9f 59 00 89 d8 e6 70 <89> e8 e6 71 5b 5d c3 cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004e9f970 EFLAGS: 00000293 RAX: 000000000000000f RBX: 000000000000000f RCX: ffff8880350e3e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8e3c3880 R12: ffffffff8dc427d8 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff8880b8723f90 smpboot_restore_warm_reset_vector arch/x86/kernel/smpboot.c:162 [inline] arch_cpuhp_cleanup_kick_cpu+0xbf/0x150 arch/x86/kernel/smpboot.c:1129 cpuhp_bp_sync_alive kernel/cpu.c:449 [inline] cpuhp_bringup_ap+0x90/0x360 kernel/cpu.c:843 cpuhp_invoke_callback+0x434/0x810 kernel/cpu.c:194 __cpuhp_invoke_callback_range kernel/cpu.c:972 [inline] cpuhp_invoke_callback_range kernel/cpu.c:996 [inline] cpuhp_up_callbacks kernel/cpu.c:1027 [inline] _cpu_up+0x2ce/0x5b0 kernel/cpu.c:1674 cpu_up+0x1d2/0x220 kernel/cpu.c:1706 cpu_subsys_online+0x67/0x280 drivers/base/cpu.c:61 device_online+0x181/0x1e0 drivers/base/core.c:4308 online_store+0xd7/0x1a0 drivers/base/core.c:2879 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb5334ea0a9 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb5334a11d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb53359ab58 RCX: 00007fb5334ea0a9 RDX: 0000000000000001 RSI: 0000200000000180 RDI: 0000000000000003 RBP: 00007fb53359ab50 R08: 00007fb5334a16c0 R09: 35203a6b63617473 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb53356c378 R13: 0000200000000100 R14: 0000200000000140 R15: 0000200000000180 ---------------- Code disassembly (best guess): 0: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: f3 0f 1e fa endbr64 1b: 55 push %rbp 1c: 53 push %rbx 1d: 89 f3 mov %esi,%ebx 1f: 89 fd mov %edi,%ebp 21: e8 51 9f 59 00 call 0x599f77 26: 89 d8 mov %ebx,%eax 28: e6 70 out %al,$0x70 * 2a: 89 e8 mov %ebp,%eax <-- trapping instruction 2c: e6 71 out %al,$0x71 2e: 5b pop %rbx 2f: 5d pop %rbp 30: c3 ret 31: cc int3 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop --- 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.