Add a check avoid segfault

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index be2eba52e38936a74224267c18eb26b7d1303f7c..ab5cc48da71ddb317bab84109eb1845b9a7818e5 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -709,7 +709,7 @@ static unsigned long long get_fs_free_counts(struct thread_data *td)
        return ret;
 }
 
-unsigned long long get_start_offset(struct thread_data *td)
+uint64_t get_start_offset(struct thread_data *td)
 {
        return td->o.start_offset +
                (td->thread_number - 1) * td->o.offset_increment;
@@ -907,10 +907,12 @@ static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
 {
        unsigned int range_size, seed;
        unsigned long nranges;
+       uint64_t file_size;
 
        range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
+       file_size = min(f->real_file_size, f->io_size);
 
-       nranges = (f->io_size + range_size - 1) / range_size;
+       nranges = (file_size + range_size - 1) / range_size;
 
        seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
        if (!td->o.rand_repeatable)
@@ -1072,11 +1074,15 @@ int add_file(struct thread_data *td, const char *fname)
        fio_file_reset(f);
 
        if (td->files_size <= td->files_index) {
-               int new_size = td->o.nr_files + 1;
+               unsigned int new_size = td->o.nr_files + 1;
 
                dprint(FD_FILE, "resize file array to %d files\n", new_size);
 
                td->files = realloc(td->files, new_size * sizeof(f));
+               if (td->files == NULL) {
+                       log_err("fio: realloc OOM\n");
+                       assert(0);
+               }
                td->files_size = new_size;
        }
        td->files[cur_files] = f;