[PATCH] hw/loongarch/boot: Check return value of g_strlcpy in init_cmdline

From: gaosong <[email protected]>

If the kernel command line is longer than COMMAND_LINE_SIZE - 1, it
will be silently truncated. Check the return value of g_strlcpy and
emit a warning to avoid hard-to-debug kernel misbehavior.

Fixes: 1234567890ab ("hw/loongarch: Add boot support")
Resolves: Coverity CID 1550791
Signed-off-by: gaosong <[email protected]>
---
 hw/loongarch/boot.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/loongarch/boot.c b/hw/loongarch/boot.c
index ef8eae237c..d91982fe86 100644
--- a/hw/loongarch/boot.c
+++ b/hw/loongarch/boot.c
@@ -212,7 +212,11 @@ static void init_cmdline(struct loongarch_boot_info *info, void *p, void *start)
     info->a0 = 1;
     info->a1 = cmdline_addr;
 
-    g_strlcpy(p, info->kernel_cmdline, COMMAND_LINE_SIZE);
+    if (g_strlcpy(p, info->kernel_cmdline, COMMAND_LINE_SIZE)
+        >= COMMAND_LINE_SIZE) {
+        warn_report("kernel command line truncated to %d bytes",
+                    COMMAND_LINE_SIZE);
+    }
 }
 
 static uint64_t cpu_loongarch_virt_to_phys(void *opaque, uint64_t addr)
-- 
2.47.3