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#1 2016-04-13 22:41:02

lazysunbather
Member
From: Poznań, Poland
Registered: 2013-09-18
Posts: 9

vsftpd 3.0.3-2 borked with kernel 4.4.5-1?

Hi there.
After one of the upgrades (can't tell which one right now), my local vsftpd installation stopped working. The bug would manifest itself by suddenly breaking up the connection with the client right after requesting a directory listing.
The configuration of the server is nothing special :

anonymous_enable=YES
write_enable=YES
anon_upload_enable=YES
connect_from_port_20=YES
listen=YES
anon_root=/srv/ftp

The anonymous user (that I log in as) has permissions to /srv/ftp. After strace'ing the server process, I found out that the child processes spawned to serve the connection are killed by a SIGSYS signal.
I found out that this problem has already been discussed before over here, but that thread hasn't seen any discussion in a while, which would suggest that the issue's now gone.
Fortunately, adding seccomp_sandbox=NO to the config file worked.

Is anybody else having such problems, or does anybody know their cause? The Arch kernel is compiled with CONFIG_SECCOMP=y, so that can't be it.

Last edited by lazysunbather (2016-04-13 22:43:28)


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