[PVE-User] invoking ssh crashes container

[Adam Weremczuk]

Hi all,

I run a minimalistic Debian 10.10 container on Proxmox 6.2-6 dual host 
stack.

It has 512 MB of memory assigned and most of the time uses about 10%.

Every time I try to ssh from it (using bash in web console) to a 
different host the container crashes (powers off).

Syslog records the following:

(...)
Jun 28 13:51:46 debian10 kernel: [26284286.210180] [  25629]  1006 
25629     3205     1290    61440        0             0 ssh
Jun 28 13:51:46 debian10 kernel: [26284286.210188] [  25634]  1006 
25634     3205     1289    61440        0             0 ssh
Jun 28 13:51:46 debian10 kernel: [26284286.210196] [  25640]  1006 
25640     3205     1292    65536        0             0 ssh
Jun 28 13:51:46 debian10 kernel: [26284286.210207] [  23745]     0 
23745     4880     1753    73728        0             0 systemd-logind
Jun 28 13:51:46 debian10 kernel: [26284286.210218] [    810] 0   810     
3962     1576    65536        0         -1000 sshd
Jun 28 13:51:46 debian10 kernel: [26284286.213678] ssh invoked 
oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, 
oom_score_adj=0
Jun 28 13:51:46 debian10 kernel: [26284286.213729] dump_header+0x4f/0x1e1
Jun 28 13:51:46 debian10 kernel: [26284286.213770] 
mem_cgroup_try_charge+0x71/0x190
Jun 28 13:51:46 debian10 kernel: [26284286.213820] filemap_fault+0x86f/0xa60
Jun 28 13:51:46 debian10 kernel: [26284286.213971] 
__handle_mm_fault+0xeb0/0x12e0
Jun 28 13:51:46 debian10 kernel: [26284286.214035] RIP: 0033:0x5619b5c48930
Jun 28 13:51:46 debian10 kernel: [26284286.214286] [  24101]  1006 
24101     3205     1088    65536      172             0 ssh
Jun 28 13:51:46 debian10 kernel: [26284286.214293] [  24105]  1006 
24105     3205     1108    65536      173             0 ssh
Jun 28 13:51:46 debian10 kernel: [26284286.214299] [  24109]  1006 
24109     3205     1103    65536      173             0 ssh
(...)
MANUAL POWER ON
Jun 28 13:58:49 debian10 systemd-sysctl[44]: Couldn't write '1' to 
'fs/protected_hardlinks', ignoring: Read-only file system
Jun 28 13:58:49 debian10 systemd-sysctl[44]: Couldn't write '1' to 
'fs/protected_symlinks', ignoring: Read-only file system
Jun 28 13:58:49 debian10 systemd[1]: Starting Flush Journal to 
Persistent Storage...
Jun 28 13:58:49 debian10 systemd[1]: Started Create System Users.
(...)

Any ideas?

Regards,
Adam