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mm: fix fault vs invalidate race for linear mappings
[powerpc.git]
/
mm
/
mlock.c
diff --git
a/mm/mlock.c
b/mm/mlock.c
index
4d3fea2
..
7b26560
100644
(file)
--- a/
mm/mlock.c
+++ b/
mm/mlock.c
@@
-244,9
+244,12
@@
int user_shm_lock(size_t size, struct user_struct *user)
locked = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
locked = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ if (lock_limit == RLIM_INFINITY)
+ allowed = 1;
lock_limit >>= PAGE_SHIFT;
spin_lock(&shmlock_user_lock);
lock_limit >>= PAGE_SHIFT;
spin_lock(&shmlock_user_lock);
- if (locked + user->locked_shm > lock_limit && !capable(CAP_IPC_LOCK))
+ if (!allowed &&
+ locked + user->locked_shm > lock_limit && !capable(CAP_IPC_LOCK))
goto out;
get_uid(user);
user->locked_shm += locked;
goto out;
get_uid(user);
user->locked_shm += locked;