Add patch to prevent division by zero in IO rate calculationbullseye-maintenance

Backport of 265a7b8a501174e2f5c8268a76b5e88d6688ad70 from Benny Baumann

1 files changed, 31 insertions, 0 deletions

diff --git a/debian/patches/0102-fix-division-by-zero-in-io-rates.patch b/debian/patches/0102-fix-division-by-zero-in-io-rates.patch
new file mode 100644
index 0000000..0fc10bc
--- /dev/null
+++ b/debian/patches/0102-fix-division-by-zero-in-io-rates.patch
@@ -0,0 +1,31 @@
+Backport of 265a7b8a501174e2f5c8268a76b5e88d6688ad70
+---
+
+--- a/linux/LinuxProcessList.c
++++ b/linux/LinuxProcessList.c
+@@ -398,6 +398,7 @@
+ 
+    unsigned long long last_read = process->io_read_bytes;
+    unsigned long long last_write = process->io_write_bytes;
++
+    char* buf = buffer;
+    char* line = NULL;
+    while ((line = strsep(&buf, "\n")) != NULL) {
+@@ -408,7 +409,7 @@
+          } else if (String_startsWith(line + 1, "ead_bytes: ")) {
+             process->io_read_bytes = strtoull(line + 12, NULL, 10);
+             process->io_rate_read_bps =
+-               ((double)(process->io_read_bytes - last_read)) / (((double)(now - process->io_rate_read_time)) / 1000);
++               now > process->io_rate_read_time ? ((double)(process->io_read_bytes - last_read)) / (((double)(now - process->io_rate_read_time)) / 1000) : NAN;
+             process->io_rate_read_time = now;
+          }
+          break;
+@@ -418,7 +419,7 @@
+          } else if (String_startsWith(line + 1, "rite_bytes: ")) {
+             process->io_write_bytes = strtoull(line + 13, NULL, 10);
+             process->io_rate_write_bps =
+-               ((double)(process->io_write_bytes - last_write)) / (((double)(now - process->io_rate_write_time)) / 1000);
++               now > process->io_rate_write_time ? ((double)(process->io_write_bytes - last_write)) / (((double)(now - process->io_rate_write_time)) / 1000) : NAN;
+             process->io_rate_write_time = now;
+          }
+          break;