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Introduce container_write_proc_files interface (bsc#1253469) #416

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merged 1 commit into from
Nov 26, 2025
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Introduce container_write_proc_files interface (bsc#1253469) #416

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19 changes: 19 additions & 0 deletions container.if
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,25 @@ interface(`container_read_state',`
ps_process_pattern($1, container_runtime_t)
')

########################################
## <summary>
## Write to /proc/PID of container runtime.
## This is needed e.g. to set uid_map or gid_map
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`container_write_proc_files',`
gen_require(`
type container_runtime_t;
')

allow $1 container_runtime_t:file { open write };
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@haircommander haircommander Nov 25, 2025

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the description seems to imply that this account-utils needs to run inside the container, but I'd xpect container_runtime_t to be used by an oci runtime tosetup for the container. can you explain the case a bit more to make sure we're targeting the right type?

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@ca-hu ca-hu Nov 26, 2025

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no, account-utils runs outside of the containers on the host and newidmapd is used to write to the /proc/<pid_of_container_runtime>/uid_map of the container runtime on the host for UID mapping between host and containers. and the /proc of the container runtime is labelled as container_runtime_t

see: https://www.thkukuk.de/blog/no_new_privs/

')

########################################
## <summary>
## Search container lib directories.
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