Package: lxc Version: 1:2.0.7-2+deb9u2 Hi.
I deployed minimal setup of latest Debian 9 (Stretch) 64-bit via netinst iso on two KVM servers from different providers. The installation of OSes was totally identical on both the servers. After that I ran these commands: apt update apt upgrade -> everything was already up to date apt install lxc lxc-create -n guest -t download -> choose Debian Jessie i386 lxc-start -n guest lxc-attach -n guest Alls well till this stage on both the servers as I am successfully dropped onto the guest shell: root@guest:~# Now if I run any command like "ps aux" on the lxc guest shell: root@guest:~# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.3 4984 3580 ? Ss 06:47 0:00 /sbin/init systemd+ 37 0.0 0.2 3508 2444 ? Ss 06:47 0:00 /lib/systemd/systemd-networkd root 40 0.0 0.2 10336 2528 ? Ss 06:47 0:00 /lib/systemd/systemd-journald systemd+ 89 0.0 0.1 3040 1976 ? Ss 06:47 0:00 /lib/systemd/systemd-resolved root 92 0.0 0.1 3772 2040 pts/3 Ss+ 06:47 0:00 /sbin/agetty --noclear --keep-baud pts/3 115200 38400 9600 vt102 root 93 0.0 0.1 3772 1984 pts/2 Ss+ 06:47 0:00 /sbin/agetty --noclear --keep-baud pts/2 115200 38400 9600 vt102 root 94 0.0 0.1 3772 1916 pts/1 Ss+ 06:47 0:00 /sbin/agetty --noclear --keep-baud pts/1 115200 38400 9600 vt102 root 95 0.0 0.2 3772 2056 pts/0 Ss+ 06:47 0:00 /sbin/agetty --noclear --keep-baud pts/0 115200 38400 9600 vt102 root 96 0.0 0.1 3772 2032 console Ss+ 06:47 0:00 /sbin/agetty --noclear --keep-baud console 115200 38400 9600 vt102 root 106 0.0 0.3 5212 3256 pts/2 Ss 06:57 0:00 /bin/bash root 109 0.0 0.2 4548 2316 pts/2 R+ 06:57 0:00 ps aux I do get the output on both. But one server remains on the guest shell (as it should), but the other one immediately exits to the host ( root@host:~# ) after showing the output. I can see following lines in the dmesg output of server which has this issue: [Fri Mar 22 02:42:17 2019] bash[1544] bad frame in 32bit sigreturn frame:00000000ffd7876c ip:f760a106 sp:ffd78cd0 orax:ffffffffffffffff [Fri Mar 22 02:42:17 2019] in libc-2.19.so[f75dc000+16e000] [Fri Mar 22 02:42:17 2019] bash[1544] bad frame in 32bit sigreturn frame:00000000ffd7876c ip:f760a106 sp:ffd78cd0 orax:ffffffffffffffff [Fri Mar 22 02:42:17 2019] in libc-2.19.so[f75dc000+16e000] [Fri Mar 22 02:42:17 2019] bash[1544] bad frame in 32bit sigreturn frame:00000000ffd7876c ip:f760a106 sp:ffd78cd0 orax:ffffffffffffffff [Fri Mar 22 02:42:17 2019] in libc-2.19.so[f75dc000+16e000] As I mentioned before, everything is identical on both the servers: LXC Version: 2.0.7 Kernel: Linux host 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux Could it be due to different CPUs (flags) on the 2 hosts? cat /proc/cpuinfo on working setup: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 61 model name : Intel Core Processor (Broadwell, IBRS) stepping : 2 microcode : 0x1 cpu MHz : 2394.454 cache size : 16384 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc rep_good nopl xtopology pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm invpcid_single ssbd ibrs ibpb kaiser fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm xsaveopt arat bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf bogomips : 4788.90 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual cat /proc/cpuinfo on problematic one: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz stepping : 4 cpu MHz : 2799.969 cache size : 4096 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc nopl pni ssse3 cx16 sse4_1 sse4_2 x2apic popcnt aes hypervisor lahf_lm kaiser xsaveopt xsavec xsaves bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf bogomips : 5599.93 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: Thanks.
