From 35afb70dcfe4eb445060dd955e5b67d962869ce5 Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Wed, 29 Sep 2021 19:29:52 +0300 Subject: [Backport 35afb70dcfe4] src: Check for NULL if ATTR_EA_INFO is incorrect This can be reason for reported panic https://lore.kernel.org/ntfs3/f9de5807-2311-7374-afb0-bc5dffb522c0@gmail.com/ Fixes: 4342306f0f0d ("src: Add file operations and implementation") Reported-by: Mohammad Rasim Signed-off-by: Konstantin Komarov --- src/frecord.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/frecord.c b/src/frecord.c index 9a53f809576d0b795ebb6ed2834792a60be463b0..007602badd9000ce190dd5a0ad13e0618aa27e83 100644 --- a/src/frecord.c +++ b/src/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; } } -- 2.31.1