From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f77.google.com (mail-oo1-f77.google.com [209.85.161.77]) (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 4E2362222AC for ; Thu, 15 Jan 2026 20:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768510102; cv=none; b=ppS8dzsLFe15RrdpNj7HwhoogSBDddECysBu0Kv7xd53C6chhXoYafA6akEn2slSXwCrwqYdS+sqZDEw6sGFGOGGhDi99RphT3NJ/O9bsLFlAOCTwn4zNQGBcjybSCjyYOZWISnP+s6JBIhnjVS3qUroFhLcgj81Bogf2A4DFeI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768510102; c=relaxed/simple; bh=zVGEiAwx7YLpCW60ytR8H/+i3S+caDzo5TkKAJ8fJvE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DqWehEF5JWAv6TLE5Q1yQZfbHdXbWdQvTOAHGxVO88Bx+KZsFI2A5X/gjQPj8feQvaW2o2B212xCA9M9iMeugU16OmNV8W+OFiS3K/qvdh+QgwS2t5Yvo3XdNM0eMj7CuaBM+2KlkA0h8EZP8YY1rquvb2o/J/7llyb8merM3Ho= 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=209.85.161.77 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-f77.google.com with SMTP id 006d021491bc7-661042be97cso4144260eaf.0 for ; Thu, 15 Jan 2026 12:48:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768510100; x=1769114900; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ZhKom9qqKQVcPcknN+ZGzSOAHRt18rVQOL6Aj/rIsMk=; b=sUC47H7wY7N7Tx1BZcqbqpH0Cg9ySH6anSXmYoJsixDUXsoztYQgSXFPz67FvmUOfD ScEOs4gI18PJzdQZGJevGEXqYfp8Ii2L2QNe7IvgeZ9t+q3krzaGmiJt28+s2X6Jd0GM kUxy4G6VBqWLaGAqXZzzam3NUBN1jO5fYMzWwn2uLECcOAMQY2ebTmrM/2mEEGTQ8CU+ UtBHzi/3mPdE/vp+um0cem8u7WjXl05roeXK+gpqUnpBV2vA4xv1+sj3XoFXkZSQAqaZ SyM+aMXWfOQlhskb0PSHf2FAX3c5y5dMXD5f9v/tkSPULx7flTDzUqUHfoiVriPxaO26 jg8g== X-Forwarded-Encrypted: i=1; AJvYcCVjNDcYVDrpU5k5XpHTi2ljUKy+ASB/9Xc2Z9BBDLXBu9u3eW+VEHjGWtfLGvgP79y9xPWbfLaf9EZuwnE6Lw==@lists.linux.dev X-Gm-Message-State: AOJu0Ywsd7Zfz1SwGlvBN4HU6J9SwfGduuRWnanzBL8/qTCQbqJp3kV7 KY+JAKfJOZY5TWFPJGY2CI3OltchpGHiLT1KNca67uUI1T/Kr8hbx2ftFleLJRZAJBQKdgnsflo dHWQgfjkkSv0UbjbHfr7FLsgpiKMH1Usx19clPkSm2EFwdO8EjVoCF8veqdo= Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:188b:b0:659:9a49:8f5e with SMTP id 006d021491bc7-66117984683mr401404eaf.35.1768510100404; Thu, 15 Jan 2026 12:48:20 -0800 (PST) Date: Thu, 15 Jan 2026 12:48:20 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69695294.050a0220.58bed.002b.GAE@google.com> Subject: [syzbot] [net?] [virt?] memory leak in napi_skb_cache_get (2) From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, eperezma@redhat.com, jasowang@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, virtualization@lists.linux.dev, xuanzhuo@linux.alibaba.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 0f61b1860cc3 Linux 6.19-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=110e7922580000 kernel config: https://syzkaller.appspot.com/x/.config?x=87bc41cae23d2144 dashboard link: https://syzkaller.appspot.com/bug?extid=7ff4013eabad1407b70a compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1241a99a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=165b8052580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fba5be00b810/disk-0f61b186.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fc83311cd569/vmlinux-0f61b186.xz kernel image: https://storage.googleapis.com/syzbot-assets/005d9685b497/bzImage-0f61b186.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7ff4013eabad1407b70a@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff88810a03e300 (size 240): comm "softirq", pid 0, jiffies 4294943617 hex dump (first 32 bytes): 90 dc d8 12 81 88 ff ff 90 dc d8 12 81 88 ff ff ................ 00 00 00 00 00 00 00 00 00 dc d8 12 81 88 ff ff ................ backtrace (crc 2f85baf): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] kmem_cache_alloc_bulk_noprof+0x22d/0x3e0 mm/slub.c:7521 napi_skb_cache_get+0xa9/0xd0 net/core/skbuff.c:291 __alloc_skb+0x214/0x2b0 net/core/skbuff.c:668 napi_alloc_skb+0x118/0x180 net/core/skbuff.c:832 page_to_skb+0xee/0x5e0 drivers/net/virtio_net.c:904 receive_mergeable drivers/net/virtio_net.c:2514 [inline] receive_buf+0x49f/0x2670 drivers/net/virtio_net.c:2660 virtnet_receive_packets drivers/net/virtio_net.c:3023 [inline] virtnet_receive drivers/net/virtio_net.c:3047 [inline] virtnet_poll+0x7d6/0x16e0 drivers/net/virtio_net.c:3136 __napi_poll+0x44/0x3a0 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x492/0x560 net/core/dev.c:7883 handle_softirqs+0xe1/0x2e0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x98/0xc0 kernel/softirq.c:723 common_interrupt+0x87/0xa0 arch/x86/kernel/irq.c:319 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 BUG: memory leak unreferenced object 0xffff88810adf5e40 (size 704): comm "kworker/u9:0", pid 51, jiffies 4294943617 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc f18cfd82): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x384/0x5a0 mm/slub.c:5315 kmalloc_reserve+0xe6/0x180 net/core/skbuff.c:586 __alloc_skb+0x111/0x2b0 net/core/skbuff.c:690 alloc_skb include/linux/skbuff.h:1383 [inline] __skb_tstamp_tx+0x162/0x4c0 net/core/skbuff.c:5677 hci_conn_tx_queue+0x11c/0x1d0 net/bluetooth/hci_conn.c:3049 hci_send_conn_frame net/bluetooth/hci_core.c:3086 [inline] hci_sched_acl_pkt net/bluetooth/hci_core.c:3701 [inline] hci_sched_acl net/bluetooth/hci_core.c:3726 [inline] hci_tx_work+0x437/0x570 net/bluetooth/hci_core.c:3820 process_one_work+0x26b/0x620 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3421 kthread+0x15b/0x310 kernel/kthread.c:463 ret_from_fork+0x2cf/0x300 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF --- 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