Merge tag 'kernel-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc kernel updates from Christian Brauner:
 "Fixes

   - rhashtable: give each instance its own lockdep class

     syzbot reported a circular locking dependency between ht->mutex and
     fs_reclaim via the simple_xattrs rhashtable being torn down during
     inode eviction.

     The predicted deadlock cannot occur: rhashtable_free_and_destroy()
     cancels the deferred worker before taking ht->mutex and
     acquisitions on distinct rhashtables are on distinct mutexes.

     Lockdep flags a cycle anyway because every ht->mutex in the kernel
     shared the single static lockdep class from
     rhashtable_init_noprof().

     The lockdep key is lifted to a per-call-site static key so every
     rhashtable instance gets its own class.

   - selftests/clone3: fix misuse of the libcap library interface in the
     cap_checkpoint_restore test and remove unused variables

   - selftests/pid_namespace: compute the pid_max test limits
     dynamically instead of hardcoding values below the kernel-enforced
     minimum of PIDS_PER_CPU_MIN * num_possible_cpus() which made the
     tests fail on machines with many possible CPUs

   - selftests: fix the Makefile TARGETS entry for nsfs which wasn't
     adjusted when the tests moved under filesystems/

  Cleanups

   - ipc/sem.c: use unsigned int for nsops to match the declaration in
     syscalls.h"

* tag 'kernel-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  selftests/clone3: remove unused variables
  selftests/clone3: fix libcap interface usage
  ipc/sem.c: use unsigned int for nsops
  selftests: Fix Makefile target for nsfs
  rhashtable: give each instance its own lockdep class
  selftests/pid_namespace: compute pid_max test limits dynamically

1 files changed, 18 insertions, 4 deletions

diff --git a/include/linux/rhashtable-types.h b/include/linux/rhashtable-types.h
index fc2f596a6df1..57c11ec9dc64 100644
--- a/include/linux/rhashtable-types.h
+++ b/include/linux/rhashtable-types.h
@@ -136,12 +136,26 @@ struct rhashtable_iter {
 	bool end_of_table;
 };
 
-int rhashtable_init_noprof(struct rhashtable *ht,
-		    const struct rhashtable_params *params);
+int __rhashtable_init_noprof(struct rhashtable *ht,
+		    const struct rhashtable_params *params,
+		    struct lock_class_key *key);
+#define rhashtable_init_noprof(ht, params)				\
+({									\
+	static struct lock_class_key __key;				\
+									\
+	__rhashtable_init_noprof(ht, params, &__key);			\
+})
 #define rhashtable_init(...)	alloc_hooks(rhashtable_init_noprof(__VA_ARGS__))
 
-int rhltable_init_noprof(struct rhltable *hlt,
-		  const struct rhashtable_params *params);
+int __rhltable_init_noprof(struct rhltable *hlt,
+		  const struct rhashtable_params *params,
+		  struct lock_class_key *key);
+#define rhltable_init_noprof(hlt, params)				\
+({									\
+	static struct lock_class_key __key;				\
+									\
+	__rhltable_init_noprof(hlt, params, &__key);			\
+})
 #define rhltable_init(...)	alloc_hooks(rhltable_init_noprof(__VA_ARGS__))
 
 #endif /* _LINUX_RHASHTABLE_TYPES_H */