Hi Ciju: I am still not exactly sure why this patch is needed. As I read user_shm_lock():
> 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); > if (!allowed && > locked + user->locked_shm > lock_limit && !capable(CAP_IPC_LOCK)) > goto out; ... if the user's locked limit (ulimit -l) is set to unlimited, allowed (above) is set to 1. In that case, the second part of that if() is bypassed, and the function grants permission. Therefore, the easy solution is to make sure your user's lock_limit is RLIM_INFINITY. On Wed, 2007-11-14 at 19:45 +0530, Ciju Rajan K wrote: <snip> > @@ -248,8 +249,14 @@ int user_shm_lock(size_t size, struct us > allowed = 1; > lock_limit >>= PAGE_SHIFT; > spin_lock(&shmlock_user_lock); > +#ifdef CONFIG_HUGETLB_PAGE > + if (!allowed && > + locked + user->locked_shm > lock_limit && > + (!(capable(CAP_IPC_LOCK) || in_group_p(sysctl_hugetlb_shm_group)))) This will allow any user in hugetlb_shm_group to make unlimited use of huge page shm segments _and_ normal page shm segments. Definitely not what you want. > +#else > if (!allowed && > locked + user->locked_shm > lock_limit && !capable(CAP_IPC_LOCK)) > +#endif > goto out; > get_uid(user); > user->locked_shm += locked; > Please don't add new #ifdefs into .c files, headers only. -- Adam Litke - (agl at us.ibm.com) IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
