[Bug 260667] [vtnet] net driver leaks when detached
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- Reply: bugzilla-noreply_a_freebsd.org: "[Bug 260667] vtnet(4): Memory leak, missing pfil_head_unregister() in vtnet_detach()"
- Reply: bugzilla-noreply_a_freebsd.org: "[Bug 260667] vtnet(4): Memory leak, missing pfil_head_unregister() in vtnet_detach()"
- Reply: bugzilla-noreply_a_freebsd.org: "[Bug 260667] vtnet(4): Memory leak, missing pfil_head_unregister() in vtnet_detach()"
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Date: Fri, 24 Dec 2021 16:26:32 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260667 Bug ID: 260667 Summary: [vtnet] net driver leaks when detached Product: Base System Version: 13.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: ghuckriede@blackberry.com Overview -------- 'if_vtnet' driver is missing the 'pfil_head_unregister()' during 'vtnet_detach()'. Included a patch, which assumes the fix for bug #256714 is also applied. Steps to Reproduce ------------------ Attach and then detach vnet device. # vmstat -m | grep pfil pfil 6 1K 5 128 # devctl attach pci0:0:4:0 virtio_pci1: <VirtIO PCI (legacy) Network adapter> port 0xc020-0xc03f mem 0xfeb92000-0xfeb92fff,0xfe004000-0xfe007fff irq 11 at device 4.0 on pci0 vtnet1: <VirtIO Networking Adapter> on virtio_pci1 pfil: duplicate head "vtnet1" 810.828154 [ 450] vtnet_netmap_attach vtnet attached txq=1, txd=256 rxq=1, rxd=128 # devctl detach pci0:0:4:0 # vmstat -m | grep pfil pfil 7 1K 6 128 Actual Results -------------- Leaks 'pfil' memory at each detach. Expected Results ---------------- All memory allocated in attach is freed in the detach. Build Date & Hardware --------------------- root@freebsd:~ # uname -a FreeBSD freebsd 13.0-RELEASE FreeBSD 13.0-RELEASE #0 releng/13.0-n244733-ea31abc261f: Fri Apr 9 04:24:09 UTC 2021 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 Additional Information ---------------------- -- You are receiving this mail because: You are the assignee for the bug.