Commit 5bc98594 authored May 06, 2007 by Akinobu Mita Committed by Linus Torvalds May 07, 2007

hugetlbfs: add NULL check in hugetlb_zero_setup()



If hugetlbfs module_init() fails, hugetlbfs_vfsmount is not initialized and
shmget() with SHM_HUGETLB flag will cause NULL pointer dereference.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent cfce6604

fs/hugetlbfs/inode.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -747,6 +747,9 @@ struct file *hugetlb_zero_setup(size_t size)
		char buf[16];
		static atomic_t counter;

		if (!hugetlbfs_vfsmount)
		return ERR_PTR(-ENOENT);

		if (!can_do_hugetlb_shm())
		return ERR_PTR(-EPERM);