mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 13:52:50 +01:00
Linus Torvalds
43a1e37445
Nicholas Carlini reports that the keyring code calls assoc_array_find() in find_key_to_update() without holding the RCU read lock, while the assoc_array_gc() code really is designed around removing the node from the tree and then freeing it after an RCU grace-period. The regular key handling doesn't see this because holding the keyring semaphore hides any lifetime issues, but the persistent key handling uses a different model. Instead of extending the keyring locking, just do the simple RCU locking that the assoc_array was designed for. Reported-by: Nicholas Carlini <[email protected]> Cc: David Howells <[email protected]> Cc: Jarkko Sakkinen <[email protected]> Cc: Paul Moore <[email protected]> Cc: James Morris James Morris <[email protected]> Cc: Serge E. Hallyn <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>