From: Xiaohui Zhu <zhuxiaohui.400@xxxxxxxxxxxxx> Anonymous huge page has no corresponding directory inode, which cause a null pointer crash when access dir with the stack trace_hugetlbfs_alloc_inode hugetlbfs_get_inode hugetlb_file_setup ksys_mmap_pgoff Signed-off-by: Xiaohui Zhu <zhuxiaohui.400@xxxxxxxxxxxxx> --- include/trace/events/hugetlbfs.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/trace/events/hugetlbfs.h b/include/trace/events/hugetlbfs.h index 8331c904a9ba..5daa52053edc 100644 --- a/include/trace/events/hugetlbfs.h +++ b/include/trace/events/hugetlbfs.h @@ -23,7 +23,9 @@ TRACE_EVENT(hugetlbfs_alloc_inode, TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->dir = dir->i_ino; + __entry->dir = 0; + if (dir) + __entry->dir = dir->i_ino; __entry->mode = mode; ), -- 2.41.0
