From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 27 Jun 2026 05:24:52 +0000 (+0900)
Subject: journal-authenticate: save mmaped size rather than file size field in the file
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=14236c019bf4061839caaaa74b6b235f6728bac2;p=thirdparty%2Fsystemd.git

journal-authenticate: save mmaped size rather than file size field in the file
---

diff --git a/src/libsystemd/sd-journal/journal-authenticate.c b/src/libsystemd/sd-journal/journal-authenticate.c
index fff7f221ab9..e77ccb9e29b 100644
--- a/src/libsystemd/sd-journal/journal-authenticate.c
+++ b/src/libsystemd/sd-journal/journal-authenticate.c
@@ -25,7 +25,7 @@ struct JournalAuthContext {
         bool hmac_running;
 
         FSSHeader *fss_file;
-        size_t fss_file_size;
+        size_t fss_mmap_size;
 
         uint64_t fss_start_usec;
         uint64_t fss_interval_usec;
@@ -38,11 +38,9 @@ JournalAuthContext* journal_auth_free(JournalAuthContext *c) {
         if (!c)
                 return NULL;
 
-        if (c->fss_file) {
-                size_t sz = PAGE_ALIGN(c->fss_file_size);
-                assert(sz < SIZE_MAX);
-                munmap(c->fss_file, sz);
-        } else
+        if (c->fss_file)
+                munmap(c->fss_file, c->fss_mmap_size);
+        else
                 iovec_done_erase(&c->fsprg_state);
 
         iovec_done_erase(&c->fsprg_seed);
@@ -145,7 +143,7 @@ int journal_auth_load(JournalAuthContext **ret) {
                 return -errno;
 
         *c = (JournalAuthContext) {
-                .fss_file_size = fss_file_size,
+                .fss_mmap_size = sz,
                 .fss_file = p,
 
                 .fss_start_usec = le64toh(p->start_usec),