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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 05:39:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 05:39:26 +0200 |
| commit | c54b245d011855ea91c5beff07f1db74143ce614 (patch) | |
| tree | 7982f28c76f578997f342c7255e222dabeffde63 /kernel/sys.c | |
| parent | Merge tag 'array-bounds-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux... (diff) | |
| parent | cred: add missing return error code when set_cred_ucounts() failed (diff) | |
| download | linux-c54b245d011855ea91c5beff07f1db74143ce614.tar.xz linux-c54b245d011855ea91c5beff07f1db74143ce614.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull user namespace rlimit handling update from Eric Biederman:
"This is the work mainly by Alexey Gladkov to limit rlimits to the
rlimits of the user that created a user namespace, and to allow users
to have stricter limits on the resources created within a user
namespace."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
cred: add missing return error code when set_cred_ucounts() failed
ucounts: Silence warning in dec_rlimit_ucounts
ucounts: Set ucount_max to the largest positive value the type can hold
kselftests: Add test to check for rlimit changes in different user namespaces
Reimplement RLIMIT_MEMLOCK on top of ucounts
Reimplement RLIMIT_SIGPENDING on top of ucounts
Reimplement RLIMIT_MSGQUEUE on top of ucounts
Reimplement RLIMIT_NPROC on top of ucounts
Use atomic_t for ucounts reference counting
Add a reference to ucounts for each cred
Increase size of ucounts to atomic_long_t
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 9de46a4bf492..ef1a78f5d71c 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -479,7 +479,7 @@ static int set_user(struct cred *new) * for programs doing set*uid()+execve() by harmlessly deferring the * failure to the execve() stage. */ - if (atomic_read(&new_user->processes) >= rlimit(RLIMIT_NPROC) && + if (is_ucounts_overlimit(new->ucounts, UCOUNT_RLIMIT_NPROC, rlimit(RLIMIT_NPROC)) && new_user != INIT_USER) current->flags |= PF_NPROC_EXCEEDED; else @@ -558,6 +558,10 @@ long __sys_setreuid(uid_t ruid, uid_t euid) if (retval < 0) goto error; + retval = set_cred_ucounts(new); + if (retval < 0) + goto error; + return commit_creds(new); error: @@ -616,6 +620,10 @@ long __sys_setuid(uid_t uid) if (retval < 0) goto error; + retval = set_cred_ucounts(new); + if (retval < 0) + goto error; + return commit_creds(new); error: @@ -691,6 +699,10 @@ long __sys_setresuid(uid_t ruid, uid_t euid, uid_t suid) if (retval < 0) goto error; + retval = set_cred_ucounts(new); + if (retval < 0) + goto error; + return commit_creds(new); error: |