From: Zhang Yi <yi.zhang@xxxxxxxxxx> Changes since v2: - Use div_u64_rem() instead of do_div(). Changes since v1: - In iomap_truncate_page() and dax_truncate_page(), for the case of truncate blocksize is not power of 2, use do_dive() to calculate the offset. This series fix a stale data exposure issue reported by Chandan when running fstests generic/561 on xfs with realtime device[1]. The real problem is xfs_setattr_size() doesn't zero out enough range when truncating a realtime inode, please see the third patch or [1] for details. The first two patches modify iomap_truncate_page() and dax_truncate_page() to pass filesystem identified blocksize, and drop the assumption of i_blocksize() as Dave suggested. The third patch fix the issue by modifying xfs_truncate_page() to pass the correct blocksize, and make sure zeroed range have been flushed to disk before updating i_size. [1] https://lore.kernel.org/linux-xfs/87ttj8ircu.fsf@debian-BULLSEYE-live-builder-AMD64/ Thanks, Yi. Zhang Yi (3): iomap: pass blocksize to iomap_truncate_page() fsdax: pass blocksize to dax_truncate_page() xfs: correct the zeroing truncate range fs/dax.c | 13 +++++++++---- fs/ext2/inode.c | 4 ++-- fs/iomap/buffered-io.c | 13 +++++++++---- fs/xfs/xfs_iomap.c | 36 ++++++++++++++++++++++++++++++++---- fs/xfs/xfs_iops.c | 10 ---------- include/linux/dax.h | 4 ++-- include/linux/iomap.h | 4 ++-- 7 files changed, 56 insertions(+), 28 deletions(-) -- 2.39.2
