erofs-utils: limit pclustersize in z_erofs_fixup_deduped_fragment()

The variable 'ctx->pclustersize' could be larger than max pclustersize.

Signed-off-by: Noboru Asai <asai@sijam.com>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Link: https://lore.kernel.org/r/20230602052039.615632-1-asai@sijam.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/lib/compress.c b/lib/compress.c
index 2e1dfb33d92905ea4aa3583a05b952ab831ef4f0..e9430569e618990efff32980a5a57d20a1f6426f 100644 (file)
--- a/lib/compress.c
+++ b/lib/compress.c
@@ -359,8 +359,9 @@ static bool z_erofs_fixup_deduped_fragment(struct z_erofs_vle_compress_ctx *ctx,
 
        /* try to fix again if it gets larger (should be rare) */
        if (inode->fragment_size < newsize) {
-               ctx->pclustersize = roundup(newsize - inode->fragment_size,
-                                           erofs_blksiz());
+               ctx->pclustersize = min(z_erofs_get_max_pclusterblks(inode) * erofs_blksiz(),
+                                       roundup(newsize - inode->fragment_size,
+                                               erofs_blksiz()));
                return false;
        }