Check the length of path

Signed-off-by: langfei <langfei@huawei.com>

backport-check_platform_device-Check-the-length-of-path.patch

@@ -0,0 +1,35 @@
+From d602002e1982a322d19034a4a64ca5a81bace7ef Mon Sep 17 00:00:00 2001
+From: Tao Liu <ltao@redhat.com>
+Date: Tue, 25 Feb 2025 16:35:34 +1300
+Subject: [PATCH] check_platform_device: Check the length of path
+
+The default length of path is 512, but the strcat() is used without
+check if path is overflowed, otherwise a segfault is observed on
+some aarch64 machines. This patch will use snprintf instead of strcat
+for the buffer length checking.
+
+Signed-off-by: Tao Liu <ltao@redhat.com>
+
+Reference:https://github.com/Irqbalance/irqbalance/commit/d602002e1982a322d19034a4a64ca5a81bace7ef
+Conflict:NA
+---
+ procinterrupts.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/procinterrupts.c b/procinterrupts.c
+index 4d04bf2..e82fac7 100644
+--- a/procinterrupts.c
++++ b/procinterrupts.c
+@@ -72,7 +72,8 @@ static int check_platform_device(char *name, struct irq_info *info)
+ 	memset(path, 0, 512);
+ 
+ 	strcat(path, "/sys/devices/platform/");
+-	strcat(path, name);
++	snprintf(path + strlen(path), sizeof(path) - strlen(path) - 1,
++		"%s", name);
+ 	strcat(path, "/");
+ 	dirfd = opendir(path);
+ 
+-- 
+2.28.0.windows.1
+

irqbalance.spec

@@ -1,7 +1,7 @@
 Summary:        A dynamic adaptive IRQ balancing daemon
 Name:           irqbalance
 Version:        1.7.0
-Release:        20
+Release:        21
 Epoch:          3
 License:        GPLv2
 Source0:        https://github.com/Irqbalance/irqbalance/archive/irqbalance-%{version}.tar.gz
@@ -39,6 +39,7 @@ Patch6014: backport-Fix-add-keep_going-check-to-prevent-irqbalance-from-failing-
 Patch6015: backport-fix-opendir-fails-in-check_platform_device.patch
 Patch6016: backport-check-whether-savedptr-is-NULL-before-invoking-strle.patch
 Patch6017: backport-procinterrupts-Fix-IRQ-name-parsing-on-certain-arm64.patch
+Patch6018: backport-check_platform_device-Check-the-length-of-path.patch
 
 %description
 Irqbalance is a daemon to help balance the cpu load generated by
@@ -96,6 +97,12 @@ fi
 /sbin/chkconfig --del %{name} >/dev/null 2>&1 || :
 
 %changelog
+* Tue Mar 18 2025 langfei <langfei@huawei.com> - 3:1.7.0-21
+- Type:bugfix
+- ID:NA
+- SUG:restart
+- DESC: Check the length of path
+
 * Thu Jan 5 2023 qinyu <qinyu32@huawei.com> - 3:1.7.0-20
 - Type:bugfix
 - ID:NA