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 EBDC4219E8 for ; Sat, 15 Aug 2026 19:05:31 +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=1786820733; cv=none; b=VJsAYRBzq781z5wqzSkSKcU2fNS7qsL7veEB63FLiRpGUxPB8UO1U0PrGtwWAyrKsjOxZUX3d6Td/1E257mVR6YYLZACFqtZROSuPYgtqZqfev0dY785Ztig+X/YjJgR+G/nAj8NfsBbyaSSYvehJYcZBjH1clld1bV/HOT+SWA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786820733; c=relaxed/simple; bh=gJ2jBi5LmX8p0QrjRaAHcjx2K27921vmwzBNC++Ow6U=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=NCjb0uFLzCIbAyZaWyJzSmwRzGHAWpNWGyz2fngac0nl4bDjQqpltPhQtOBwX5vNs8mZb97Hb8b0HHVE8fR5IPfSa6gJDG7D4oV5EOacgSGUC0AU4ltHrQLq8j1ChC6pWfb2Do0MZPUlZ7XGqVwAHqahK+taOH3ASLKtYTCqdDs= 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 006d021491bc7-6a0f261aeb6so2619031eaf.3 for ; Sat, 15 Aug 2026 12:05:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786820731; x=1787425531; 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=bmgSW4j5GiF7fDESSM7LsP2d8izilj9+9VU7QkjM3ro=; b=M2OPjvYt+xDgiJMSC2vLBzkeBhpsesXqS2MG/hPYuzW60w4ksTrves3uPy6V5bjeWa YJ2yss/sTzG9p4Hr1lg9xYi7svDl3XHM/ZpcBLQefF7+hlgk6fF/9vaTkiwlxDo265Qq +pwkjY33FdpvRVqlEMdUM00aMP3aPtfb3AJWRA6HJJiDSE0hcJEI64lKEs62aDPoEOLB eEcTMeVDoaTKrEyFXsdO1PYBVti/RpFkrY4jDTMcY7pdiBlLl1FYbn5m0M0ssq0nFDV2 hjoAMqXbW4pMtn2dOqFwGvzUjBWNLdV6tmXPWGw0oREluLzrdMe0iirmAfhl/j+gPCSz E1lw== X-Forwarded-Encrypted: i=1; AHgh+RruvXLIBgGhv5s+zd5EdIjz44LMRog0YzPqD3MM5PauMmZKjgebaPGWAh9234YI0efdl8GwcK+Hj84nDRw=@vger.kernel.org X-Gm-Message-State: AOJu0YwLKq93bGjDiznRx+9EcMUUt2N4RpiqVu98Mx37L5jD+vNRMQg9 LzSaoCEihPxer6UeqF+LcTV4wPK3zJEOok2IyFSHIbDmxH23ICt6sQXq/XWxFQp7uUN7dfHrbG9 /9/0vRFX7HO2YMzd4/m3x5YdZzBKi2TvB77r69SjXo6c/vPUEiqiIkdJOrX8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3091:b0:6b0:4e2b:17d0 with SMTP id 006d021491bc7-6b0d68fd314mr12862707eaf.30.1786820730894; Sat, 15 Aug 2026 12:05:30 -0700 (PDT) Date: Sat, 15 Aug 2026 12:05:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a80b87a.dbb3a75c.20434b.001d.GAE@google.com> Subject: [syzbot] [net?] kernel BUG in qlist_free_all (4) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, kuniyu@google.com, linux-kernel@vger.kernel.org, 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: df685633c3db Merge tag 'rcu-fixes.v7.1-20260519a' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10897536580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0f0911eedbc130a dashboard link: https://syzkaller.appspot.com/bug?extid=b7a5f122d6dd573df0d1 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/90074e46cb62/disk-df685633.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/691247547753/vmlinux-df685633.xz kernel image: https://storage.googleapis.com/syzbot-assets/e1c705a2acac/bzImage-df685633.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b7a5f122d6dd573df0d1@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at arch/x86/mm/physaddr.c:28! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 101 PID: 5289 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__phys_addr+0x99/0x100 arch/x86/mm/physaddr.c:28 Code: 84 d2 75 28 0f b6 0d 57 a9 1e 0f 80 f9 3f 0f 87 a7 ed 67 ff 48 89 e8 48 d3 e8 48 85 c0 75 0a 48 89 e8 5b 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 c7 e1 ed d7 90 e8 39 8f bb 00 eb ca 48 c7 c0 10 f0 5b RSP: 0018:ffffc9000366f538 EFLAGS: 00010287 RAX: 840077090033186c RBX: 83ffff890033186c RCX: 000000080020001a RDX: dffffc0000000000 RSI: 000000000020001a RDI: 83ffff888033186c RBP: 840077088033186c R08: ffff88802d950001 R09: 000000080020001a R10: 0000000000000001 R11: 0000000000000000 R12: 83ffff888033186c R13: 0000000000000000 R14: ffffc9000366f580 R15: ffff8880b85439b0 FS: 00007f66bbcd2780(0000) GS:ffff888124474000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555588f66a38 CR3: 000000007ac58000 CR4: 00000000003526f0 Call Trace: virt_to_slab mm/slab.h:168 [inline] qlink_to_cache mm/kasan/quarantine.c:131 [inline] qlist_free_all+0x5f/0xf0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4569 [inline] slab_alloc_node mm/slub.c:4898 [inline] kmem_cache_alloc_node_noprof+0x25a/0x6f0 mm/slub.c:4950 __alloc_skb+0x140/0x710 net/core/skbuff.c:702 alloc_skb include/linux/skbuff.h:1383 [inline] alloc_skb_with_frags+0xdd/0x760 net/core/skbuff.c:6734 sock_alloc_send_pskb+0x801/0x980 net/core/sock.c:2998 unix_dgram_sendmsg+0x3c7/0x1810 net/unix/af_unix.c:2141 unix_seqpacket_sendmsg+0x12a/0x1d0 net/unix/af_unix.c:2542 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] sock_write_iter+0x524/0x5a0 net/socket.c:1254 do_iter_readv_writev+0x6ee/0x920 fs/read_write.c:829 vfs_writev+0x360/0xe10 fs/read_write.c:1059 do_writev+0x28a/0x340 fs/read_write.c:1105 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f66bbd5c407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffd60c66880 EFLAGS: 00000202 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f66bbcd2780 RCX: 00007f66bbd5c407 RDX: 0000000000000005 RSI: 00007ffd60c668e0 RDI: 000000000000000a RBP: 000056120f92f400 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000056120f92f400 R13: 000000000000012c R14: 00000000ffffffff R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__phys_addr+0x99/0x100 arch/x86/mm/physaddr.c:28 Code: 84 d2 75 28 0f b6 0d 57 a9 1e 0f 80 f9 3f 0f 87 a7 ed 67 ff 48 89 e8 48 d3 e8 48 85 c0 75 0a 48 89 e8 5b 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 c7 e1 ed d7 90 e8 39 8f bb 00 eb ca 48 c7 c0 10 f0 5b RSP: 0018:ffffc9000366f538 EFLAGS: 00010287 RAX: 840077090033186c RBX: 83ffff890033186c RCX: 000000080020001a RDX: dffffc0000000000 RSI: 000000000020001a RDI: 83ffff888033186c RBP: 840077088033186c R08: ffff88802d950001 R09: 000000080020001a R10: 0000000000000001 R11: 0000000000000000 R12: 83ffff888033186c R13: 0000000000000000 R14: ffffc9000366f580 R15: ffff8880b85439b0 FS: 00007f66bbcd2780(0000) GS:ffff888124374000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdd954c9e80 CR3: 000000007ac58000 CR4: 00000000003526f0 --- 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