A CentOS 7.6 instance with latests updates does not work with snapd,
it crashes on startup.
# uname -a
Linux linux-builder-02 3.10.0-957.10.1.el7.x86_64 #1 SMP Mon Mar 18 15:06:45 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
# cat /proc/meminfo
MemTotal: 32742684 kB
MemFree: 25363796 kB
MemAvailable: 30603012 kB
# cat /etc/*release*
CentOS Linux release 7.6.1810 (Core)
Derived from Red Hat Enterprise Linux 7.6 (Source)
NAME="CentOS Linux"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
CentOS Linux release 7.6.1810 (Core)
# yum info snapd
Loaded plugins: copr, fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.corbina.net
* epel: fedora-mirror01.rbc.ru
* extras: centos-mirror.rbc.ru
* ius: ftp.acc.umu.se
* updates: centos-mirror.rbc.ru
Installed Packages
Name : snapd
Arch : x86_64
Version : 2.37.4
Release : 2.el7
Size : 41 M
Repo : installed
From repo : epel
Summary : A transactional software package manager
URL : https://github.com/snapcore/snapd
License : GPLv3
Description : Snappy is a modern, cross-distribution, transactional package manager
: designed for working with self-contained, immutable packages.
# SNAPD_DEBUG=1 /usr/libexec/snapd/snapd
2019/03/21 16:37:44.016183 daemon.go:379: started snapd/2.37.4-2.el7 (series 16; classic; devmode) centos/7 (amd64) linux/3.10.0-957.10.1.el7.x86_6.
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xa43cbf]
goroutine 22 [running]:
panic(0xb04da0, 0x138e5c0)
/usr/lib/golang/src/runtime/panic.go:556 +0x2cb fp=0xc00008dda8 sp=0xc00008dd18 pc=0x42c6fb
runtime.panicmem()
/usr/lib/golang/src/runtime/panic.go:82 +0x5e fp=0xc00008ddc8 sp=0xc00008dda8 pc=0x42b73e
runtime.sigpanic()
/usr/lib/golang/src/runtime/signal_unix.go:390 +0x182 fp=0xc00008de18 sp=0xc00008ddc8 pc=0x441d12
github.com/snapcore/snapd/daemon.(*shutdownServer).CanStandby(0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/daemon/daemon.go:444 +0x3f fp=0xc00008dea8 sp=0xc00008de18 pc=0xa43cbf
github.com/snapcore/snapd/overlord/standby.(*StandbyOpinions).CanStandby(0xc0002fde50, 0x2540be400)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/overlord/standby/standby.go:67 +0x212 fp=0xc00008df38 sp=0xc00008dea8 pc=0xa1f972
github.com/snapcore/snapd/overlord/standby.(*StandbyOpinions).Start.func1(0xc0002fde50)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/overlord/standby/standby.go:88 +0xa1 fp=0xc00008dfd8 sp=0xc00008df38 pc=0xa1feb1
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00008dfe0 sp=0xc00008dfd8 pc=0x459f21
created by github.com/snapcore/snapd/overlord/standby.(*StandbyOpinions).Start
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/overlord/standby/standby.go:84 +0x3f
goroutine 1 [select]:
runtime.gopark(0xc5f598, 0x0, 0x1809, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc000165c10 sp=0xc000165bf0 pc=0x42e81b
runtime.selectgo(0xc000165e58, 0xc000165dc4, 0x3, 0x1, 0x1)
/usr/lib/golang/src/runtime/select.go:313 +0xcc6 fp=0xc000165d70 sp=0xc000165c10 pc=0x43e006
main.run(0xc000222a80, 0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/cmd/snapd/main.go:145 +0x4a4 fp=0xc000165ee0 sp=0xc000165d70 pc=0xa53014
main.main()
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/cmd/snapd/main.go:58 +0xd5 fp=0xc000165f98 sp=0xc000165ee0 pc=0xa52765
runtime.main()
/usr/lib/golang/src/runtime/proc.go:201 +0x207 fp=0xc000165fe0 sp=0xc000165f98 pc=0x42e427
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000165fe8 sp=0xc000165fe0 pc=0x459f21
goroutine 2 [force gc (idle)]:
runtime.gopark(0xc5f558, 0x13d45f0, 0x1410, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00007ef80 sp=0xc00007ef60 pc=0x42e81b
runtime.goparkunlock(0x13d45f0, 0x1410, 0x1)
/usr/lib/golang/src/runtime/proc.go:308 +0x53 fp=0xc00007efb0 sp=0xc00007ef80 pc=0x42e8c3
runtime.forcegchelper()
/usr/lib/golang/src/runtime/proc.go:251 +0xb3 fp=0xc00007efe0 sp=0xc00007efb0 pc=0x42e693
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007efe8 sp=0xc00007efe0 pc=0x459f21
created by runtime.init.5
/usr/lib/golang/src/runtime/proc.go:240 +0x35
goroutine 3 [GC sweep wait]:
runtime.gopark(0xc5f558, 0x13d4760, 0x42140c, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00007f780 sp=0xc00007f760 pc=0x42e81b
runtime.goparkunlock(0x13d4760, 0xcf140c, 0x1)
/usr/lib/golang/src/runtime/proc.go:308 +0x53 fp=0xc00007f7b0 sp=0xc00007f780 pc=0x42e8c3
runtime.bgsweep(0xc0000a8000)
/usr/lib/golang/src/runtime/mgcsweep.go:52 +0x8f fp=0xc00007f7d8 sp=0xc00007f7b0 pc=0x42185f
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007f7e0 sp=0xc00007f7d8 pc=0x459f21
created by runtime.gcenable
/usr/lib/golang/src/runtime/mgc.go:216 +0x58
goroutine 4 [finalizer wait]:
runtime.gopark(0xc5f558, 0x13f2c90, 0x140f, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00007ff28 sp=0xc00007ff08 pc=0x42e81b
runtime.goparkunlock(0x13f2c90, 0x140f, 0x1)
/usr/lib/golang/src/runtime/proc.go:308 +0x53 fp=0xc00007ff58 sp=0xc00007ff28 pc=0x42e8c3
runtime.runfinq()
/usr/lib/golang/src/runtime/mfinal.go:175 +0x99 fp=0xc00007ffe0 sp=0xc00007ff58 pc=0x419219
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007ffe8 sp=0xc00007ffe0 pc=0x459f21
created by runtime.createfing
/usr/lib/golang/src/runtime/mfinal.go:156 +0x61
goroutine 5 [syscall]:
runtime.notetsleepg(0x13f3100, 0xffffffffffffffff, 0x0)
/usr/lib/golang/src/runtime/lock_futex.go:227 +0x37 fp=0xc000080788 sp=0xc000080758 pc=0x40c877
os/signal.signal_recv(0x0)
/usr/lib/golang/src/runtime/sigqueue.go:139 +0x9c fp=0xc0000807b0 sp=0xc000080788 pc=0x442c9c
os/signal.loop()
/usr/lib/golang/src/os/signal/signal_unix.go:23 +0x22 fp=0xc0000807e0 sp=0xc0000807b0 pc=0x4dc012
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0000807e8 sp=0xc0000807e0 pc=0x459f21
created by os/signal.init.0
/usr/lib/golang/src/os/signal/signal_unix.go:29 +0x41
goroutine 6 [select, locked to thread]:
runtime.gopark(0xc5f598, 0x0, 0x1809, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00007e5e0 sp=0xc00007e5c0 pc=0x42e81b
runtime.selectgo(0xc00007e780, 0xc00007e778, 0x2, 0x0, 0xc000094101)
/usr/lib/golang/src/runtime/select.go:313 +0xcc6 fp=0xc00007e740 sp=0xc00007e5e0 pc=0x43e006
runtime.ensureSigM.func1()
/usr/lib/golang/src/runtime/signal_unix.go:547 +0x1bf fp=0xc00007e7e0 sp=0xc00007e740 pc=0x45767f
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007e7e8 sp=0xc00007e7e0 pc=0x459f21
created by runtime.ensureSigM
/usr/lib/golang/src/runtime/signal_unix.go:530 +0xd5
goroutine 34 [timer goroutine (idle)]:
runtime.gopark(0xc5f558, 0x13d9480, 0x12c4b1414, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00007bf28 sp=0xc00007bf08 pc=0x42e81b
runtime.goparkunlock(0x13d9480, 0xc000301414, 0x1)
/usr/lib/golang/src/runtime/proc.go:308 +0x53 fp=0xc00007bf58 sp=0xc00007bf28 pc=0x42e8c3
runtime.timerproc(0x13d9480)
/usr/lib/golang/src/runtime/time.go:280 +0x288 fp=0xc00007bfd8 sp=0xc00007bf58 pc=0x44b138
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007bfe0 sp=0xc00007bfd8 pc=0x459f21
created by runtime.(*timersBucket).addtimerLocked
/usr/lib/golang/src/runtime/time.go:170 +0x114
goroutine 23 [syscall]:
runtime.notetsleepg(0x13d9420, 0x2540ae821, 0x1)
/usr/lib/golang/src/runtime/lock_futex.go:227 +0x37 fp=0xc00007cf58 sp=0xc00007cf28 pc=0x40c877
runtime.timerproc(0x13d9400)
/usr/lib/golang/src/runtime/time.go:288 +0x30e fp=0xc00007cfd8 sp=0xc00007cf58 pc=0x44b1be
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00007cfe0 sp=0xc00007cfd8 pc=0x459f21
created by runtime.(*timersBucket).addtimerLocked
/usr/lib/golang/src/runtime/time.go:170 +0x114
goroutine 24 [select]:
runtime.gopark(0xc5f598, 0x0, 0x1809, 0x1)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc0000ebd68 sp=0xc0000ebd48 pc=0x42e81b
runtime.selectgo(0xc0000ebf10, 0xc0000ebef4, 0x3, 0x13d4ee0, 0x0)
/usr/lib/golang/src/runtime/select.go:313 +0xcc6 fp=0xc0000ebec8 sp=0xc0000ebd68 pc=0x43e006
github.com/snapcore/snapd/overlord.(*Overlord).Loop.func1(0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/overlord/overlord.go:281 +0x10f fp=0xc0000ebf98 sp=0xc0000ebec8 pc=0xa1f38f
github.com/snapcore/snapd/vendor/gopkg.in/tomb%2ev2.(*Tomb).run(0xc0002fc000, 0xc0002f1800)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/vendor/gopkg.in/tomb.v2/tomb.go:163 +0x2b fp=0xc0000ebfd0 sp=0xc0000ebf98 pc=0x647b7b
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0000ebfd8 sp=0xc0000ebfd0 pc=0x459f21
created by github.com/snapcore/snapd/vendor/gopkg.in/tomb%2ev2.(*Tomb).Go
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/vendor/gopkg.in/tomb.v2/tomb.go:159 +0xba
goroutine 25 [IO wait]:
runtime.gopark(0xc5f528, 0x7f682ffd4f28, 0x1b02, 0x5)
/usr/lib/golang/src/runtime/proc.go:302 +0xeb fp=0xc00008cb20 sp=0xc00008cb00 pc=0x42e81b
runtime.netpollblock(0x7f682ffd4f00, 0x72, 0xc0003f6000)
/usr/lib/golang/src/runtime/netpoll.go:366 +0x99 fp=0xc00008cb58 sp=0xc00008cb20 pc=0x429b49
internal/poll.runtime_pollWait(0x7f682ffd4f00, 0x72, 0x0)
/usr/lib/golang/src/runtime/netpoll.go:173 +0x66 fp=0xc00008cb88 sp=0xc00008cb58 pc=0x4291f6
internal/poll.(*pollDesc).wait(0xc000309918, 0x72, 0xc00030e000, 0x0, 0x0)
/usr/lib/golang/src/internal/poll/fd_poll_runtime.go:85 +0x9a fp=0xc00008cbb8 sp=0xc00008cb88 pc=0x494a9a
internal/poll.(*pollDesc).waitRead(0xc000309918, 0xffffffffffffff00, 0x0, 0x0)
/usr/lib/golang/src/internal/poll/fd_poll_runtime.go:90 +0x3d fp=0xc00008cbf0 sp=0xc00008cbb8 pc=0x494bad
internal/poll.(*FD).Accept(0xc000309900, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/lib/golang/src/internal/poll/fd_unix.go:384 +0x1a0 fp=0xc00008cc58 sp=0xc00008cbf0 pc=0x496eb0
net.(*netFD).accept(0xc000309900, 0xc0003ad2f0, 0x30, 0x50)
/usr/lib/golang/src/net/fd_unix.go:238 +0x42 fp=0xc00008cd28 sp=0xc00008cc58 pc=0x689732
net.(*UnixListener).accept(0xc00037d7a0, 0x30, 0xb72640, 0x0)
/usr/lib/golang/src/net/unixsock_posix.go:162 +0x32 fp=0xc00008cd60 sp=0xc00008cd28 pc=0x6adf32
net.(*UnixListener).Accept(0xc00037d7a0, 0xc0002dc000, 0x50, 0x7f68300206c0, 0x0)
/usr/lib/golang/src/net/unixsock.go:257 +0x47 fp=0xc00008cda0 sp=0xc00008cd60 pc=0x6abe37
github.com/snapcore/snapd/daemon.(*ucrednetListener).Accept(0xc0002f0d50, 0x0, 0x0, 0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/daemon/ucrednet.go:105 +0x4d fp=0xc00008ce20 sp=0xc00008cda0 pc=0xa4c6ad
net/http.(*onceCloseListener).Accept(0xc0003ad260, 0xc000032390, 0xaf8fa0, 0x138e4e0, 0xbb4ea0)
<autogenerated>:1 +0x3c fp=0xc00008ce58 sp=0xc00008ce20 pc=0x7dfa9c
net/http.(*Server).Serve(0xc0003f4000, 0xd07840, 0xc0002f0d50, 0x0, 0x0)
/usr/lib/golang/src/net/http/server.go:2826 +0x22f fp=0xc00008cf18 sp=0xc00008ce58 pc=0x7bda5f
github.com/snapcore/snapd/daemon.(*shutdownServer).Serve(0xc0003ad230, 0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/daemon/daemon.go:440 +0x40 fp=0xc00008cf50 sp=0xc00008cf18 pc=0xa43c50
github.com/snapcore/snapd/daemon.(*Daemon).Start.func2(0x0, 0x0)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/daemon/daemon.go:562 +0x42 fp=0xc00008cf98 sp=0xc00008cf50 pc=0xa4d312
github.com/snapcore/snapd/vendor/gopkg.in/tomb%2ev2.(*Tomb).run(0xc0002f2108, 0xc0002f1810)
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/vendor/gopkg.in/tomb.v2/tomb.go:163 +0x2b fp=0xc00008cfd0 sp=0xc00008cf98 pc=0x647b7b
runtime.goexit()
/usr/lib/golang/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00008cfd8 sp=0xc00008cfd0 pc=0x459f21
created by github.com/snapcore/snapd/vendor/gopkg.in/tomb%2ev2.(*Tomb).Go
/builddir/build/BUILD/snapd-2.37.4/src/github.com/snapcore/snapd/vendor/gopkg.in/tomb.v2/tomb.go:159 +0xba
Aborted
I've downgraded kernel to 3.10.0-957.5.1 and all works fine
# snap version
snap 2.37.4-2.el7
snapd 2.37.4-2.el7
series 16
centos 7
kernel 3.10.0-
# uname -a
Linux linux-builder-02 3.10.0-