Date: Thu, 04 Apr 2019 01:52:28 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236999] vmx driver stops sending network packets and resets connections (TCP) but allows ICMP Message-ID: <bug-236999-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236999 Bug ID: 236999 Summary: vmx driver stops sending network packets and resets connections (TCP) but allows ICMP Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: mshirk@daemon-security.com Tested on 13-CURRENT, with a FreeBSD VM running under ESXi (not sure the versions, I actually do not have console access at this point). I did an upgrade from 12-ALPHA4 something to 13-CURRENT and after this was completed, users were unable to download files over 1MB from this server. I verified that I could SSH into this system and navigate the simple website = that was serving files, but whenever I tried to download a 40MB file, the transf= er would stop, the connection would reset. I verified the same thing was happening with SFTP, navigate to the file, everything worked, but start the transfer, connection reset. I enabled ICMP to be able to ping this system continuously, and noticed not= hing was dropping out, and verified nothing else was going on (that I am aware o= f) with any type of security device, packet shaping, etc. But with ICMP working fine while TCP connections were reset, I went to look= at NIC offloading features, and all of them were turned on. Running the following to disable all of it with the vmx driver, and all of = the problems went away, file transfers started to work: ifconfig vmx0 -rxcsum -txcsum -tso4 -tso6 -lro -rxcsum6 -txcsum6 -vlanhwcsum -vlanhwtso I tried flipping each one off and on trying to see it was one particular option, and it appears TSO4/TSO6 is where the problems resides vmx0@pci0:3:0:0: class=3D0x020000 card=3D0x07b015ad chip=3D0x07b015a= d rev=3D0x01 hdr=3D0x00 vendor =3D 'VMware' device =3D 'VMXNET3 Ethernet Controller' class =3D network subclass =3D ethernet [1] Hypervisor: Origin =3D "VMwareVMware" [1] vmx0: <VMware VMXNET3 Ethernet Adapter> port 0x4000-0x400f mem 0xfd5fc000-0xfd5fcfff,0xfd5fd000-0xfd5fdfff,0xfd5fe000-0xfd5fffff irq 18 at device 0.0 on pci3 [1] vmx0: <VMware VMXNET3 Ethernet Adapter> port 0x4000-0x400f mem 0xfd5fc000-0xfd5fcfff,0xfd5fd000-0xfd5fdfff,0xfd5fe000-0xfd5fffff irq 18 at device 0.0 on pci3 [1] vmx0: Using 512 tx descriptors and 256 rx descriptors [1] vmx0: Using 2 rx queues 2 tx queues [1] vmx0: failed to allocate 3 MSI-X vectors, err: 6 - using MSI [1] vmx0: Using an MSI interrupt [1] vmx0: Ethernet address: 00:50:56:8f:25:15 [1] vmx0: netmap queues/slots: TX 1/512, RX 1/512 --=20 You are receiving this mail because: You are the assignee for the bug.=
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