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Diffstat (limited to 'Documentation/security/keys.txt')
| -rw-r--r-- | Documentation/security/keys.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt index d389acd31e1..aa0dbd74b71 100644 --- a/Documentation/security/keys.txt +++ b/Documentation/security/keys.txt @@ -805,6 +805,23 @@ The keyctl syscall functions are: kernel and resumes executing userspace. + (*) Invalidate a key. + + long keyctl(KEYCTL_INVALIDATE, key_serial_t key); + + This function marks a key as being invalidated and then wakes up the + garbage collector. The garbage collector immediately removes invalidated + keys from all keyrings and deletes the key when its reference count + reaches zero. + + Keys that are marked invalidated become invisible to normal key operations + immediately, though they are still visible in /proc/keys until deleted + (they're marked with an 'i' flag). + + A process must have search permission on the key for this function to be + successful. + + =============== KERNEL SERVICES =============== |