From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) (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 BB0B14B049A for ; Sun, 16 Aug 2026 12:47:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786884460; cv=none; b=d9qhAYOz0T2U+wxG+2VIKAjDUKEPQujuf8yi1U0/tH3Fa5miMtVoTp/m38zwZRdbiZhCZL9OUANZThfEuhnFQP8j16qtW9PL6EXOuwfg8SJwuH+jV/p0K8bklziEvCpSw3iG5aJuWDf6kOZwdhQq3PoEmLUfOaQp2fncNMv/oY4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786884460; c=relaxed/simple; bh=ILb6/7ZfOqsIvaxrqLMugsmvjCAlr4xA2Y6da/eFTRs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DtBMNwm2l8uHUCTGP/y+5jvU7ysX7uriLoprYLNKw2yR/IC1YqQVK8cpp1JFAudWcZXb+ZNgSsZyg9h1ysVVwLyTrAbe1YAxs1ghdoKkAo6BrTJHdFrEhm50XaJfzJC7KTitDXBS77lMC9agFV9RY8U/XxykSCYI1huo+d5JM14= 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=209.85.167.200 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-f200.google.com with SMTP id 5614622812f47-48e5de5a23cso2593889b6e.0 for ; Sun, 16 Aug 2026 05:47:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786884457; x=1787489257; 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=TSpDaxYzHFwUnzqT7RI67m0OXWTNdwi2aVJ80LV7HW8=; b=ApTT1VsPMQPtKkrZvFd4+EdHsLQ8viOAowp6xf8GWIAKjRj5mFA4RwOyseuatMuFRI ZQFV3QDuAhy8T83v1wKdgLqpcrpkYnA48JsUeGmnsvynO9X02uiw1nNRJFS2lteHrRWg lDo2Lm/bO2hSnq21Nx/wJ2Pq7Uz4dXboR0fAtXqXSjIVwYflq1gTX794dRMWFBqhvpTE XR3+NkW0o00ka0yLhyKhMNVKlGSBRG4dbV2PvviBUovWUcAGd47iJzqC6Vbpd/f8ZZVA MOffIFS0/Us9WC1Lu7OsFuoqGzEygYAxTsTjKAuNeDiMkzHpl2i1CAacI3Z3OZxekWfy TIWg== X-Gm-Message-State: AOJu0YweAB9ctECeq5f95ZfbbC46EwAty5qOcfLHjspmcSqG02g0K1hb +zI2jfdfNa4iX23K2M3I7CYROKA7zOo9WfY1Gh6Iu6AyitL5EEdITdIodtXbsax932qLDcrT4/H jW7BJTaX6hlM9Dkb+zs+SCUnWx2lpkbIL/HqwL2I+myTzyKnCkw37vm9R0GU= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:23c4:b0:4b1:91e1:6740 with SMTP id 5614622812f47-4b241e02717mr18777967b6e.10.1786884457338; Sun, 16 Aug 2026 05:47:37 -0700 (PDT) Date: Sun, 16 Aug 2026 05:47:37 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a81b169.dbb3a75c.20434b.002f.GAE@google.com> Subject: [syzbot] kernel BUG in __free_frozen_pages From: syzbot To: 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: f5bbbfec59b4 Merge tag 'probes-fixes-v7.2-rc7' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=106a5079580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307 dashboard link: https://syzkaller.appspot.com/bug?extid=f71493d41adfafb97a1a compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166c4c79580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f71493d41adfafb97a1a@syzkaller.appspotmail.com vfs_read+0x1e4/0xb40 fs/read_write.c:572 ksys_read+0x12a/0x250 fs/read_write.c:716 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:1361! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6026 Comm: syz-executor398 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__free_pages_prepare mm/page_alloc.c:1361 [inline] RIP: 0010:__free_frozen_pages+0xcd3/0x1090 mm/page_alloc.c:2950 Code: 48 c7 c6 c0 8c e1 8b 4c 89 f7 e8 68 eb ef ff 90 0f 0b 85 db 0f 84 6e f5 ff ff 48 c7 c6 20 8d e1 8b 4c 89 ff e8 4e eb ef ff 90 <0f> 0b 48 c7 44 24 20 01 00 00 00 48 c7 44 24 28 01 00 00 00 e9 d5 RSP: 0018:ffffc900030f7af8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900030f79dc RDX: ffff88802b830000 RSI: ffffffff825c2128 RDI: ffff88802b8304c4 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea00009afb88 R14: ffffea00009afb80 R15: ffffea00009afb80 FS: 00007f34a2fe96c0(0000) GS:ffff8880d5eec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34a27e6208 CR3: 0000000027e6e000 CR4: 0000000000352ef0 Call Trace: free_buffer_page kernel/trace/ring_buffer.c:398 [inline] ring_buffer_subbuf_order_set+0x1325/0x18e0 kernel/trace/ring_buffer.c:7444 buffer_subbuf_size_write+0x182/0x280 kernel/trace/trace.c:8221 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_pwrite64 fs/read_write.c:794 [inline] __do_sys_pwrite64 fs/read_write.c:802 [inline] __se_sys_pwrite64 fs/read_write.c:799 [inline] __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:799 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f34a303ec1e Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007f34a2fe9198 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f34a2fe96c0 RCX: 00007f34a303ec1e RDX: 0000000000000002 RSI: 00007f34a308a02b RDI: 0000000000000003 RBP: 00007f34a308a028 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffd0 R13: 0000000000000000 R14: 00007ffcb8a85c30 R15: 00007ffcb8a85d18 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__free_pages_prepare mm/page_alloc.c:1361 [inline] RIP: 0010:__free_frozen_pages+0xcd3/0x1090 mm/page_alloc.c:2950 Code: 48 c7 c6 c0 8c e1 8b 4c 89 f7 e8 68 eb ef ff 90 0f 0b 85 db 0f 84 6e f5 ff ff 48 c7 c6 20 8d e1 8b 4c 89 ff e8 4e eb ef ff 90 <0f> 0b 48 c7 44 24 20 01 00 00 00 48 c7 44 24 28 01 00 00 00 e9 d5 RSP: 0018:ffffc900030f7af8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900030f79dc RDX: ffff88802b830000 RSI: ffffffff825c2128 RDI: ffff88802b8304c4 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea00009afb88 R14: ffffea00009afb80 R15: ffffea00009afb80 FS: 00007f34a2fe96c0(0000) GS:ffff8880d5eec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34a27e6208 CR3: 0000000027e6e000 CR4: 0000000000352ef0 --- 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 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