Fix UBSAN if s_log_groups_per_flex is 31

[tools/e2fsprogs.git] / lib / ext2fs / alloc_tables.c

diff --git a/lib/ext2fs/alloc_tables.c b/lib/ext2fs/alloc_tables.c
index 971a6ce..e8a1fef 100644 (file)
--- a/lib/ext2fs/alloc_tables.c
+++ b/lib/ext2fs/alloc_tables.c
@@ -43,7 +43,7 @@ static blk64_t flexbg_offset(ext2_filsys fs, dgrp_t group, blk64_t start_blk,
        blk64_t         last_blk, first_free = 0;
        dgrp_t          last_grp;
 
-       flexbg_size = 1 << fs->super->s_log_groups_per_flex;
+       flexbg_size = 1U << fs->super->s_log_groups_per_flex;
        flexbg = group / flexbg_size;
        size = rem_grp * elem_size;
 
@@ -97,7 +97,7 @@ errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
 
        if (ext2fs_has_feature_flex_bg(fs->super) &&
            fs->super->s_log_groups_per_flex) {
-               flexbg_size = 1 << fs->super->s_log_groups_per_flex;
+               flexbg_size = 1U << fs->super->s_log_groups_per_flex;
                last_grp = group | (flexbg_size - 1);
                if (last_grp > fs->group_desc_count-1)
                        last_grp = fs->group_desc_count-1;