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pilebones / go-udev

Simple udev implementation in Golang
GNU General Public License v3.0
95 stars 28 forks source link

Check for Recvfrom error #4

Closed stolowski closed 6 years ago

stolowski commented 6 years ago

I think the following PR should prevent the panic that I'm experiencing on VMs in our automated test environment:

Jun 11 14:38:34 jun111628-661587 snapd[13155]: panic: runtime error: slice bounds out of range
Jun 11 14:38:34 jun111628-661587 snapd[13155]: goroutine 15 [running]:
Jun 11 14:38:34 jun111628-661587 snapd[13155]: panic(0x556b13061ea0, 0xc82000a070)
Jun 11 14:38:34 jun111628-661587 snapd[13155]:         /usr/lib/go-1.6/src/runtime/panic.go:481 +0x3ea
Jun 11 14:38:34 jun111628-661587 snapd[13155]: github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink.(*UEventConn).ReadMsg(0xc820322320, 0x0, 0x0, 0x0, 0x0, 0x0)
Jun 11 14:38:34 jun111628-661587 snapd[13155]:         /home/gopath/src/github.com/snapcore/snapd/_build/src/github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink/conn.go:72 +0x148
Jun 11 14:38:34 jun111628-661587 snapd[13155]: github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink.(*UEventConn).ReadUEvent(0xc820322320, 0x0, 0x0, 0x0)
Jun 11 14:38:34 jun111628-661587 snapd[13155]:         /home/gopath/src/github.com/snapcore/snapd/_build/src/github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink/conn.go:79 +0x33
Jun 11 14:38:34 jun111628-661587 snapd[13155]: github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink.(*UEventConn).Monitor.func1(0xc820327f20, 0xc820322320, 0xc820326420, 0x0, 0x0, 0xc8203263c0)
Jun 11 14:38:34 jun111628-661587 snapd[13155]:         /home/gopath/src/github.com/snapcore/snapd/_build/src/github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink/conn.go:109 +0x8a
Jun 11 14:38:34 jun111628-661587 snapd[13155]: created by github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink.(*UEventConn).Monitor
Jun 11 14:38:34 jun111628-661587 snapd[13155]:         /home/gopath/src/github.com/snapcore/snapd/_build/src/github.com/snapcore/snapd/vendor/github.com/pilebones/go-udev/netlink/conn.go:124 +0x239
stolowski commented 6 years ago

Just to confirm, this does fix the panic I've been experiencing.