[PATCH v9 4/8] Reimplement RLIMIT_NPROC on top of ucounts

Alexey Gladkov gladkov.alexey at gmail.com
Tue Apr 6 15:44:44 UTC 2021


On Mon, Apr 05, 2021 at 11:56:35AM -0500, Eric W. Biederman wrote:
>
> Also when setting ns->ucount_max[] in create_user_ns because one value
> is signed and the other is unsigned.  Care should be taken so that
> rlimit_infinity is translated into the largest positive value the
> type can hold.

You mean like that ?

ns->ucount_max[UCOUNT_RLIMIT_NPROC] = rlimit(RLIMIT_NPROC) <= LONG_MAX ?
	rlimit(RLIMIT_NPROC) : LONG_MAX;
ns->ucount_max[UCOUNT_RLIMIT_MSGQUEUE] = rlimit(RLIMIT_MSGQUEUE) <= LONG_MAX ?
	rlimit(RLIMIT_MSGQUEUE) : LONG_MAX;
ns->ucount_max[UCOUNT_RLIMIT_SIGPENDING] = rlimit(RLIMIT_SIGPENDING) <= LONG_MAX ?
	rlimit(RLIMIT_SIGPENDING) : LONG_MAX;
ns->ucount_max[UCOUNT_RLIMIT_MEMLOCK] = rlimit(RLIMIT_MEMLOCK) <= LONG_MAX ?
	rlimit(RLIMIT_MEMLOCK) : LONG_MAX;

-- 
Rgrds, legion



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