From: dongshengyuan <545258830@qq.com>
Date: Mon, 15 Jun 2026 07:43:51 +0000 (+0800)
Subject: random-seed: fix wrong error variable in log_error_errno()
X-Git-Tag: v261-rc4~22
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ef8fb91ccd2d5343239ff77098e77330739c480;p=thirdparty%2Fsystemd.git

random-seed: fix wrong error variable in log_error_errno()

At line 285, ftruncate() failure was logged using 'r' which is 0
from the preceding successful loop_write() call. log_error_errno(0, ...)
triggers an assertion crash in developer builds (ASSERT_NON_ZERO) and
silently returns success in release builds, swallowing the ftruncate error.

Replace with errno which is set by ftruncate() on failure.

Signed-off-by: dongshengyuan <dongshengyuan@uniontech.com>
Co-developed-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---

diff --git a/src/random-seed/random-seed-tool.c b/src/random-seed/random-seed-tool.c
index 514176ef5d8..289291761f0 100644
--- a/src/random-seed/random-seed-tool.c
+++ b/src/random-seed/random-seed-tool.c
@@ -282,7 +282,7 @@ static int save_seed_file(
                 return log_error_errno(r, "Failed to write new random seed file: %m");
 
         if (ftruncate(seed_fd, k) < 0)
-                return log_error_errno(r, "Failed to truncate random seed file: %m");
+                return log_error_errno(errno, "Failed to truncate random seed file: %m");
 
         r = fsync_full(seed_fd);
         if (r < 0)