diff options
| author | dillon <dillon@FreeBSD.org> | 2003-01-13 23:04:32 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 2003-01-13 23:04:32 +0000 |
| commit | ce710d36cc14755344115d36e5459a39e385e64d (patch) | |
| tree | 3c875a6ad9627d4125943a71834883e1b354baa5 /sys/sys/ipc.h | |
| parent | e08a8297e2779e8d6e2160c041440e8f3908ece8 (diff) | |
| download | FreeBSD-src-ce710d36cc14755344115d36e5459a39e385e64d.zip FreeBSD-src-ce710d36cc14755344115d36e5459a39e385e64d.tar.gz | |
It is possible for an active aio to prevent shared memory from being
dereferenced when a process exits due to the vmspace ref-count being
bumped. Change shmexit() and shmexit_myhook() to take a vmspace instead
of a process and call it in vmspace_dofree(). This way if it is missed
in exit1()'s early-resource-free it will still be caught when the zombie is
reaped.
Also fix a potential race in shmexit_myhook() by NULLing out
vmspace->vm_shm prior to calling shm_delete_mapping() and free().
MFC after: 7 days
Diffstat (limited to 'sys/sys/ipc.h')
| -rw-r--r-- | sys/sys/ipc.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/sys/ipc.h b/sys/sys/ipc.h index e78082a..c79c857 100644 --- a/sys/sys/ipc.h +++ b/sys/sys/ipc.h @@ -115,10 +115,11 @@ struct ipc_perm { struct thread; struct proc; +struct vmspace; int ipcperm(struct thread *, struct ipc_perm *, int); extern void (*shmfork_hook)(struct proc *, struct proc *); -extern void (*shmexit_hook)(struct proc *); +extern void (*shmexit_hook)(struct vmspace *); #else /* ! _KERNEL */ |
