Bug#704154: vdr - Fails if started without any of CAP_SYS_TIME, CAP_SYS_NICE or CAP_NET_RAW

[Bastian Blank]

Package: vdr
Version: 1.7.28-1
Severity: serious

vdr tries to drop almost all capabilities except of CAP_SYS_TIME,
CAP_SYS_NICE and CAP_NET_RAW. It does this without checking the current
capability set, which may not include any of them[1], and fails hard if this
does not work.

| capget(0x20080522, 0, NULL)             = 0
| capset(0x20080522, 0, {CAP_NET_RAW|CAP_SYS_NICE|CAP_SYS_TIME, CAP_NET_RAW|CAP_SYS_NICE|CAP_SYS_TIME, 0}) = -1 EPERM (Operation not permitted)
| write(2, "vdr: cap_set_proc failed: Operat"..., 50) = 50
| exit_group(2)                           = ?

Bastian

[1]: In case of LXC, it does not include at least CAP_SYS_TIME, because it
     affects always the whole system.

-- System Information:
Debian Release: 7.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.8-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash