The advisory lock may be activated or activated and removed during the

sleep waiting for conditions when the lock may be granted.
To prevent lf_setlock() from accessing possibly freed memory, add reference
counting to the struct lockf_entry. Bump refcount around the sleep.

Make lf_free_lock() return non-zero when structure was freed, and use
this after the sleep to return EINTR to the caller. The error code might
need a clarification, but we cannot return success to usermode, since
the lock is not owned anymore.

Reviewed by:	dfr
Tested by:	pho
MFC after:	1 month

0 files changed, 0 insertions, 0 deletions