stats: fix io_u_plat out-of-bound accesses (round 2)
Commit 833491908a1afd67 introduced the ability to report completion
latency percentiles. It also caused a memory corruption when running
with multiple threads due to out of bound accesses in show_run_stats().
The major index of the io_u_plat two-dimensional array is meant
to be DDIR_ value in {DDIR_READ, DDIR_WRITE} (i.e., {0, 1}). The
code in show_run_stats() incorrectly wrote into the array using
a major index with values {0, 1, 2}. Commit 0a0b49007cbce8d1 fixed
the out of bound accesses by increasing the size of the major
dimension of the io_u_plat array from 2 to 3.
This patch reverts the size change from 0a0b49007cbce8d1 in favor
of avoiding the out-of-bound accesses in show_run_stats().
Signed-off-by: Eric Gouriou <egouriou@google.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/fio.h b/fio.h
index c741162..6c57496 100644
--- a/fio.h
+++ b/fio.h
@@ -217,7 +217,7 @@
unsigned int io_u_complete[FIO_IO_U_MAP_NR];
unsigned int io_u_lat_u[FIO_IO_U_LAT_U_NR];
unsigned int io_u_lat_m[FIO_IO_U_LAT_M_NR];
- unsigned int io_u_plat[3][FIO_IO_U_PLAT_NR];
+ unsigned int io_u_plat[2][FIO_IO_U_PLAT_NR];
unsigned long total_io_u[3];
unsigned long short_io_u[3];
unsigned long total_submit;