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init: sandbox: also map rootfs user 10000

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Signed-off-by: Casey Connolly <kcxt@postmarketos.org>
This commit is contained in:
Casey Connolly 2025-05-08 17:22:31 +02:00
parent 72aa31cc79
commit 53b3415f58
1 changed files with 35 additions and 12 deletions
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47
pmb/init/sandbox.py
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@ -428,20 +428,43 @@ def become_user(uid: int, gid: int) -> None:
# Fork again for UID map, bweh this is suuuper gross # Fork again for UID map, bweh this is suuuper gross
newpid = os.fork() newpid = os.fork()
if newpid == 0: if newpid == 0:
os.execl("/usr/bin/newuidmap", "newuidmap", os.execl(
str(ppid), "/usr/bin/newuidmap",
"0", str(uid), "1", "newuidmap",
"1", "100000", "9999", str(ppid),
# 12345 is the UID of the "pmos" or "build" user in our containers "0",
"12345", "110000", "55536") str(uid),
# str(uid+1), "110000", "55536") "1",
"1",
"100000",
"9999",
# 12345 is the UID of the "pmos" or "build" user in our containers
"12345",
"110000",
"1",
"10000",
"120000",
"1",
)
else: else:
os.waitpid(newpid, 0) os.waitpid(newpid, 0)
os.execl("/usr/bin/newgidmap", "newgidmap", os.execl(
str(ppid), "/usr/bin/newgidmap",
"0", str(uid), "1", "newgidmap",
"1", "100000", "9999", str(ppid),
"12345", "110000", "55536") "0",
str(uid),
"1",
"1",
"100000",
"9999",
"12345",
"110000",
"1",
"10000",
"120000",
"1",
)
except OSError as e: except OSError as e:
print(e.strerror, flush=True) print(e.strerror, flush=True)
os._exit(e.errno or 1) os._exit(e.errno or 1)