From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (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 7E2ED386450 for ; Fri, 12 Jun 2026 18:10:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781287827; cv=none; b=tMO7jEE9He3n4/CNfp4p0penKHh9jBczRCAAcdvEkfP2IMIh31z1TqwW0C75I8fG3PVOz0CXlOgXDO4/Xm7G6j0PyOpX9tIaWUdjTxtN1PT4lK2YryNA32Sadg6JeyQYKUF6O63HjDnO4L5viBb3aPAxfJt/cT+Au/eBoFZ9RDk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781287827; c=relaxed/simple; bh=2TMuwBomo89HySu0bfdsooZ4RlCZQ1uWipntkQ/sgLk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=p67eydWE8lFOn0TIlsvspT3yjo8pxtH3qyajS1x2Eyk8kmzji+m32dF3c58YofgSffPu60IH99XAAKP+hkVPLl9jZfIAFI9PeZW/5X0zGf41TMmLT84FIYryGiyIklfugPbkJ8+nN0+y2ATzMtlnLoqzGO+GeidAmR/Z0Cka3ZQ= 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=209.85.167.205 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-oi1-f205.google.com with SMTP id 5614622812f47-485fdae1db3so1678857b6e.1 for ; Fri, 12 Jun 2026 11:10:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781287823; x=1781892623; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=GMcx812Pa2b2GSUyy1c1By8n/A9d4UWs0IBrgGBwkyk=; b=jTL2FiuObtVIUm1WhnAd+d8cTmxAGe4Jl4wJoOGwBFmSG7WWx5iP4OVnJQIAQJnOX2 bo6wWOsoXLraWvTmatglCEhb4QM0ngrYlCWcNSe71RxtdQrdIORI3kCNPXvYvaXRo0fe T2ZWGDznHydgbF8KFIMXusZv6r+PCa+G2/VMmL6mWTXVPvK0CeIMLAnTN+0zB/ZwKPuk TxTkROlYhDe+1Amv3LicqAMSPsS56JNEIzr20r5jV0RK2L/NvINgXbactg8fx7v5Kaog FmYl2HZEobVK71kCYB5F3MzwZKNJ3ulKm53w9BaFIfb+bp5jvLT8XrdeXkTx7J8ea4QN XFHA== X-Gm-Message-State: AOJu0YyzrrZl3gXFkhyJwvImchd3LxcBdPO6tsoTkrFBPKj8o+IdsnO8 HFgyrD6b+TIvrVEFs5Z4LcS58TiBuiJ7IAoMomLdDTILLTh1S+sBmlPKu81rETAEHixytDIzYHJ hou6p59DpVsNegigCfpHpHgaFWw7vEz+2dRGg8WpUvNy0cZnjDz87cuqZJbFfuw== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2228:b0:45f:13fe:4a3d with SMTP id 5614622812f47-4872f312735mr2366721b6e.7.1781287823249; Fri, 12 Jun 2026 11:10:23 -0700 (PDT) Date: Fri, 12 Jun 2026 11:10:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a2c4b8f.be3f099c.2836ae.0000.GAE@google.com> Subject: [syzbot] [kernel?] general protection fault in __schedule (3) From: syzbot To: linux-kernel@vger.kernel.org, luto@kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ec039126b7fa Add linux-next specific files for 20260611 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=137c78ae580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5aaa5302b37e7e10 dashboard link: https://syzkaller.appspot.com/bug?extid=484ec80b3ff2dbdea632 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4f58c704a9e9/disk-ec039126.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bf67100d5618/vmlinux-ec039126.xz kernel image: https://storage.googleapis.com/syzbot-assets/bf93fe076f41/bzImage-ec039126.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+484ec80b3ff2dbdea632@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 UID: 0 PID: 5884 Comm: syz.2.21 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:task_cpu include/linux/sched.h:2268 [inline] RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline] RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline] RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline] RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143 Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98 RSP: 0000:ffffc9000565fcc0 EFLAGS: 00010003 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60 RBP: ffffc9000565fea8 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658 R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014 FS: 000055557157d500(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555904597d0 CR3: 000000005f3e8000 CR4: 00000000003526f0 Call Trace: __schedule_loop kernel/sched/core.c:7307 [inline] schedule+0x164/0x360 kernel/sched/core.c:7322 __exit_to_user_mode_loop kernel/entry/common.c:55 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x291/0x8c0 kernel/entry/common.c:165 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679 RIP: 0033:0x7f9b0e311494 Code: 54 24 28 0f 82 5e 03 00 00 40 0f b6 fe c6 44 24 0e 01 45 31 ed 45 31 f6 89 7c 24 08 85 c0 0f 84 10 01 00 00 66 90 48 8b 3c 24 <49> 8b 54 24 40 4c 89 f0 4a 03 14 ef 80 3d 01 69 3a 00 00 49 89 d6 RSP: 002b:00007fff0de8b200 EFLAGS: 00000293 RAX: 0000000000000001 RBX: ffffffff81b962a3 RCX: ffffffff81b962a3 RDX: 00000000000002a3 RSI: ffffffff81b962a3 RDI: 00007f9b0da95008 RBP: 0000000000000000 R08: 00007f9b0e6a0000 R09: 00007f9b0e6a2000 R10: 0000000081b962a7 R11: 0000000000000006 R12: 00007f9b0e6b6128 R13: 000000000000a5e4 R14: ffffffff81b96705 R15: 00007f9b0f1e5720 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:task_cpu include/linux/sched.h:2268 [inline] RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline] RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline] RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline] RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143 Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98 RSP: 0000:ffffc9000565fcc0 EFLAGS: 00010003 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60 RBP: ffffc9000565fea8 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658 R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014 FS: 000055557157d500(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555904597d0 CR3: 000000005f3e8000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 24 80 and $0x80,%al 2: 00 00 add %al,(%rax) 4: 00 e8 add %ch,%al 6: 80 67 fc f6 andb $0xf6,-0x4(%rdi) a: 48 8b 84 24 80 00 00 mov 0x80(%rsp),%rax 11: 00 12: 48 8b 18 mov (%rax),%rbx 15: 4c 8d 7b 14 lea 0x14(%rbx),%r15 19: 4c 89 f8 mov %r15,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 87 04 00 00 jne 0x4bd 36: 45 8b 3f mov (%r15),%r15d 39: 49 83 ff 08 cmp $0x8,%r15 3d: 0f .byte 0xf 3e: 83 .byte 0x83 3f: 98 cwtl --- 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