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| author | Wenjie Qi <qwjhust@gmail.com> | 2026-06-10 22:37:35 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-04 13:45:05 +0200 |
| commit | f5b8b3dd6e8593262726147fb6bac4526b0cb0fb (patch) | |
| tree | a5f018ca30c624b92ec339ebec92444e8072c2ec | |
| parent | 8a2d8a34ef0bb669321ba411df5ee57975919e88 (diff) | |
| download | linux-stable-f5b8b3dd6e8593262726147fb6bac4526b0cb0fb.tar.gz linux-stable-f5b8b3dd6e8593262726147fb6bac4526b0cb0fb.zip | |
f2fs: reject setattr size changes on large folio files
commit 242d30bfc0a84b8b5de0a88821b53c9ad7fd31c4 upstream.
F2FS large folios are only enabled for immutable non-compressed files.
Writable open and writable mmap reject such mappings, but truncate(2)
through f2fs_setattr() misses the same guard.
If FS_IMMUTABLE_FL is cleared while the inode is still cached, the mapping
can keep large-folio support and ATTR_SIZE can change i_size. Reject size
changes in that state.
Cc: stable@kernel.org
Fixes: 05e65c14ea59 ("f2fs: support large folio for immutable non-compressed case")
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/f2fs/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index fb12c5c9affd..6d750e9d6f32 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1098,6 +1098,8 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, return -EPERM; if ((attr->ia_valid & ATTR_SIZE)) { + if (mapping_large_folio_support(inode->i_mapping)) + return -EOPNOTSUPP; if (!f2fs_is_compress_backend_ready(inode) || IS_DEVICE_ALIASING(inode)) return -EOPNOTSUPP; |