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journal: fix potential integer overflow

This commit is contained in:
Lennart Poettering 2012-10-17 21:23:52 +02:00
parent dbc4fbae58
commit 4fa25d62bd
1 changed files with 7 additions and 1 deletions
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8
src/journal/journal-vacuum.c
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@ -243,6 +243,7 @@ int journal_directory_vacuum(
have_seqnum = false;
} else
/* We do not vacuum active files or unknown files! */
continue;
patch_realtime(directory, de->d_name, &st, &realtime);
@ -291,7 +292,12 @@ int journal_directory_vacuum(
if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) {
log_debug("Deleted archived journal %s/%s.", directory, list[i].filename);
sum -= list[i].usage;
if ((uint64_t) list[i].usage > sum)
sum -= list[i].usage;
else
sum = 0;
} else if (errno != ENOENT)
log_warning("Failed to delete %s/%s: %m", directory, list[i].filename);
}