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nspawn: fix UID map string

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We send/recv the set of payload uid, host uid, payload gid, host gid.
Hence, the index must be incremented with 4, instead of 2.

Fixes #23664.

(cherry picked from commit 05ab439a62de8bb47e4137d2a8a473a307ccfb33)
This commit is contained in:
Yu Watanabe 2022-06-15 22:32:40 +09:00 committed by Zbigniew Jędrzejewski-Szmek
parent 73a327d2f4
commit 20037219b7
1 changed files with 2 additions and 2 deletions
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4
src/nspawn/nspawn.c
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@ -4137,8 +4137,8 @@ static int make_uid_map_string(
* quadruplet, consisting of host and container UID + GID. */
for (size_t i = 0; i < n_bind_user_uid; i++) {
uid_t payload_uid = bind_user_uid[i*2+offset],
host_uid = bind_user_uid[i*2+offset+1];
uid_t payload_uid = bind_user_uid[i*4+offset],
host_uid = bind_user_uid[i*4+offset+1];
assert(previous_uid <= payload_uid);
assert(payload_uid < arg_uid_range);