On Sat, Dec 15, 2018 at 10:02:34AM +0000, Radostin Stoyanov wrote:
> There is a limit on the number of lines in the /proc/<pid>/{g,u}id_map
> files. In Linux 4.14 and earlier, this limit was (arbitrarily) set at
> 5 lines. Since Linux 4.15, which was released on 28 Jan 2018, the limit
> is 340 lines.
>
> This change is documented in user_namespaces(7).
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6397fac4915ab3002dc15aae751455da1a852f25
>
> Signed-off-by: Radostin Stoyanov <rstoyanov1@xxxxxxxxx>
> ---
> src/lxc/lxc_controller.c | 7 +++++++
> 1 file changed, 7 insertions(+)
Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
>
> diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
> index 99360397a7..2bec8846aa 100644
> --- a/src/lxc/lxc_controller.c
> +++ b/src/lxc/lxc_controller.c
> @@ -1390,6 +1390,13 @@ virLXCControllerSetupUsernsMap(virDomainIdMapEntryPtr map,
> size_t i;
> int ret = -1;
>
> + /* The kernel supports up to 340 lines in /proc/<pid>/{g,u}id_map */
> + if (num > 340) {
> + virReportError(VIR_ERR_INVALID_ARG, "%s",
> + _("Too many id mappings defined."));
> + goto cleanup;
> + }
> +
> for (i = 0; i < num; i++)
> virBufferAsprintf(&map_value, "%u %u %u\n",
> map[i].start, map[i].target, map[i].count);
> --
> 2.19.2
>
> --
> libvir-list mailing list
> libvir-list@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/libvir-list
Regards,
Daniel
--
|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org -o- https://fstop138.berrange.com :|
|: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list
