From 8b3ec6814c83d76b85bd13badc48552836c24839 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 30 May 2012 17:11:23 -0400
Subject: take security_mmap_file() outside of ->mmap_sem
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
ipc/shm.c | 5 +++++
1 file changed, 5 insertions(+)
(limited to 'ipc')
diff --git a/ipc/shm.c b/ipc/shm.c
index 406c5b208193..e3a8063b1768 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1036,6 +1036,10 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
sfd->file = shp->shm_file;
sfd->vm_ops = NULL;
+ err = security_mmap_file(file, prot, flags);
+ if (err)
+ goto out_fput;
+
down_write(¤t->mm->mmap_sem);
if (addr && !(shmflg & SHM_REMAP)) {
err = -EINVAL;
@@ -1058,6 +1062,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
invalid:
up_write(¤t->mm->mmap_sem);
+out_fput:
fput(file);
out_nattch:
--
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