From 22ea4eba63410515c1aa6e0dde67bda22d31a660 Mon Sep 17 00:00:00 2001 From: Frank Sorenson Date: Tue, 30 Oct 2018 15:07:01 -0700 Subject: [PATCH] fat: truncate inode timestamp updates in setattr setattr_copy can't truncate timestamps correctly for msdos/vfat, so truncate and copy them ourselves. Link: http://lkml.kernel.org/r/a2b4701b1125573fafaeaae6802050ca86d6f8cc.1538363961.git.sorenson@redhat.com Signed-off-by: Frank Sorenson Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fat/file.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/fs/fat/file.c b/fs/fat/file.c index 4b5438405415..13935ee99e1e 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -542,6 +542,18 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr) up_write(&MSDOS_I(inode)->truncate_lock); } + /* + * setattr_copy can't truncate these appropriately, so we'll + * copy them ourselves + */ + if (attr->ia_valid & ATTR_ATIME) + fat_truncate_time(inode, &attr->ia_atime, S_ATIME); + if (attr->ia_valid & ATTR_CTIME) + fat_truncate_time(inode, &attr->ia_ctime, S_CTIME); + if (attr->ia_valid & ATTR_MTIME) + fat_truncate_time(inode, &attr->ia_mtime, S_MTIME); + attr->ia_valid &= ~(ATTR_ATIME|ATTR_CTIME|ATTR_MTIME); + setattr_copy(inode, attr); mark_inode_dirty(inode); out: