From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 78EB32DC76F for ; Mon, 8 Dec 2025 08:58:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765184308; cv=none; b=lb1a2F0JPB0QnpOtM4O1KHKP9nl716SVCGxGF2VAeuHtVt2QrmFTh0B02G91ujNlXxTw0A+sM43Z/dkXLsP9w87ghy5cAbP4YCX9q5nFtxscWkBxDeyGuv2WptiL66kq40aKrBhH1eKmjbp5ng7S2mZiI81gQkuJVbQzG26PD38= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765184308; c=relaxed/simple; bh=ZS71SkdDyRKSWwtwVL9j8zb1nfO+MqbEZ7A91WWyfNU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QVh00oFsg4orfQI96BloKpVpUDwLApifGXtsG4e1Zr+Q98ZNOfINnNhoxrh3eUsXeFZ9Bsvrplb740XLCO2MYwBNVN0csabTd/Gg0m6S9kMdAS1XnizyrjFCbGxeV4H417jS97eEPVlFGhX3jwAxheotei3tLKCPhid1gGhIKO0= 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=209.85.167.206 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-f206.google.com with SMTP id 5614622812f47-4530ea23ce6so6694357b6e.1 for ; Mon, 08 Dec 2025 00:58:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765184305; x=1765789105; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9FQasKD4bqoPxS9gKhFI9S0GuhkqNXd0OMNuacVPrKw=; b=cYdukwwNCZopHZMpLWf6bW8/d4EXr1261D+GiCaaezwN7U5ouZAVjMz7aKU+bhr/l1 Xhqs9IpGt/Aq4VHCYMfQNT5SMm4HTCg+jRiY8HVtrLfSPjHtJYYXAZ5s5kKESRZ11LiQ PKgUOqy/q/Sw9LO6Jgn6+drr0bM7XRGJdPBY5+ASrtf+clzUzN0UmHctQIIPb900qnzh XlXEQSJ01+gDhDsXOW4UUQJZDe2FuKfzNg5sfXWylcEwJUk1on5Mj7esDh6K4Q0/K9/8 f7BAg1QH9CJgWy2Wl9exe/ILnOkXe2yuuQDFt2Vg7cctk8Bzx0mVOY2BkxlBSKXIzshR dZfg== X-Forwarded-Encrypted: i=1; AJvYcCWiuY/qVOeChzYCRsvxnbhCvr0Tp333L/79ZWMgbCAIZUr5bLaf1DB7ME5/hvhZ/yWJX6Y=@vger.kernel.org X-Gm-Message-State: AOJu0Ywg3bDsvblK++XjdQvp1PC7N91X4un9v0P8vjiZ2BtOMJFBVNbk j8U/rL6DweCIm0yGoKyVPPck1lBrLAZrI5zaMxlGI7JIjNCZYb2vnAcLI2FZVSc+Ma048P/wXBW JAUd5tIlkTnZR165Mr3d4ojFvRCpg6zmHd/OZn9xXE7GVeg5JH+tlFVBcEPQ= X-Google-Smtp-Source: AGHT+IFZbjrqQF5gjS1Cv/xFxoq1Zp2A6lPpXNZ8sqN7jFPoGRpQglq9N/QrYtkv4alX3tXkL1Y9cbWV+nA2jo/oB4X4qT5ZeoO+ Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1621:b0:659:9a49:9045 with SMTP id 006d021491bc7-6599a8b6ef8mr3257881eaf.16.1765184305736; Mon, 08 Dec 2025 00:58:25 -0800 (PST) Date: Mon, 08 Dec 2025 00:58:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69369331.a70a0220.38f243.009d.GAE@google.com> Subject: [syzbot] [net?] [bpf?] general protection fault in bq_flush_to_queue (2) From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, eddyz87@gmail.com, haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, netdev@vger.kernel.org, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: aa833fc394ba drm/xe: Fix duplicated put due to merge resol.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12f27cc2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bb66b4eefaf3f448 dashboard link: https://syzkaller.appspot.com/bug?extid=2b3391f44313b3983e91 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148d701a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166e7192580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/262740328d6d/disk-aa833fc3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bf629be0ab14/vmlinux-aa833fc3.xz kernel image: https://storage.googleapis.com/syzbot-assets/b71e61abc00a/bzImage-aa833fc3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2b3391f44313b3983e91@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 6085 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__list_del include/linux/list.h:204 [inline] RIP: 0010:__list_del_clearprev include/linux/list.h:217 [inline] RIP: 0010:bq_flush_to_queue+0x46f/0x580 kernel/bpf/cpumap.c:740 Code: 35 00 4d 8b 26 4d 8d 74 24 08 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 0b f2 35 00 49 89 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 f2 f1 35 00 4c 89 23 48 8b 04 24 RSP: 0018:ffffc90004207650 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: ffff888030b0c400 R08: ffff888024b2802b R09: 1ffff11004965005 R10: dffffc0000000000 R11: ffffed1004965006 R12: ffffc90003ad79e0 R13: 0000000000000008 R14: ffffc90003ad79e8 R15: dffffc0000000000 FS: 00007f6b36bed6c0(0000) GS:ffff888126d5e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6b36becf98 CR3: 000000003f6c6000 CR4: 00000000003526f0 Call Trace: __cpu_map_flush+0x5d/0xd0 kernel/bpf/cpumap.c:808 xdp_do_flush+0x13c/0x1d0 net/core/filter.c:4348 xdp_test_run_batch net/bpf/test_run.c:348 [inline] bpf_test_run_xdp_live+0x154f/0x1b20 net/bpf/test_run.c:379 bpf_prog_test_run_xdp+0x7c0/0x10e0 net/bpf/test_run.c:1388 bpf_prog_test_run+0x2cd/0x340 kernel/bpf/syscall.c:4703 __sys_bpf+0x562/0x860 kernel/bpf/syscall.c:6182 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6272 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6b3759f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6b36bed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6b377f6090 RCX: 00007f6b3759f749 RDX: 0000000000000050 RSI: 0000200000000000 RDI: 000000000000000a RBP: 00007f6b37623f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6b377f6128 R14: 00007f6b377f6090 R15: 00007ffda92d99b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del include/linux/list.h:204 [inline] RIP: 0010:__list_del_clearprev include/linux/list.h:217 [inline] RIP: 0010:bq_flush_to_queue+0x46f/0x580 kernel/bpf/cpumap.c:740 Code: 35 00 4d 8b 26 4d 8d 74 24 08 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 0b f2 35 00 49 89 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 f2 f1 35 00 4c 89 23 48 8b 04 24 RSP: 0018:ffffc90004207650 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: ffff888030b0c400 R08: ffff888024b2802b R09: 1ffff11004965005 R10: dffffc0000000000 R11: ffffed1004965006 R12: ffffc90003ad79e0 R13: 0000000000000008 R14: ffffc90003ad79e8 R15: dffffc0000000000 FS: 00007f6b36bed6c0(0000) GS:ffff888126d5e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6b36becf98 CR3: 000000003f6c6000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 35 00 4d 8b 26 xor $0x268b4d00,%eax 5: 4d 8d 74 24 08 lea 0x8(%r12),%r14 a: 4c 89 f0 mov %r14,%rax d: 48 c1 e8 03 shr $0x3,%rax 11: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 16: 74 08 je 0x20 18: 4c 89 f7 mov %r14,%rdi 1b: e8 0b f2 35 00 call 0x35f22b 20: 49 89 1e mov %rbx,(%r14) 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 f2 f1 35 00 call 0x35f22b 39: 4c 89 23 mov %r12,(%rbx) 3c: 48 8b 04 24 mov (%rsp),%rax --- 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