From 1a82a3ed69f52bcc421bd2a900a85537926aaa93 Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Fri, 28 Jan 2022 16:30:13 +0800 Subject: [PATCH] fs/ntfs3: Check for NULL if ATTR_EA_INFO is incorrect mainline inclusion from mainline-v5.15 commit 35afb70dcfe4eb445060dd955e5b67d962869ce5 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- This can be reason for reported panic https://lore.kernel.org/ntfs3/f9de5807-2311-7374-afb0-bc5dffb522c0@gmail.com/ Fixes: 4342306f0f0d ("fs/ntfs3: Add file operations and implementation") Reported-by: Mohammad Rasim Signed-off-by: Konstantin Komarov Signed-off-by: Yin Xiujiang Signed-off-by: Zheng Zengkai Acked-by: Hou Tao Acked-by: Xie XiuQi Signed-off-by: Zheng Zengkai --- fs/ntfs3/frecord.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c index 9a53f809576d..007602badd90 100644 --- a/fs/ntfs3/frecord.c +++ b/fs/ntfs3/frecord.c @@ -3080,7 +3080,9 @@ static bool ni_update_parent(struct ntfs_inode *ni, struct NTFS_DUP_INFO *dup, const struct EA_INFO *info; info = resident_data_ex(attr, sizeof(struct EA_INFO)); - dup->ea_size = info->size_pack; + /* If ATTR_EA_INFO exists 'info' can't be NULL. */ + if (info) + dup->ea_size = info->size_pack; } } -- GitLab