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authorAndreas Schwab <schwab@suse.de>2012-12-04 16:14:13 +0100
committerAndreas Schwab <schwab@suse.de>2013-01-10 09:59:58 +0100
commitdd31ac7a8e0d4cc24eee6815f9101caa5aa64291 (patch)
tree084cc65c5b744f23cada0fae9bfd4c0c1cbb3ca3 /nscd/servicescache.c
parent3167bfc62bb38e3057f7694566b5bb157236a5a8 (diff)
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Properly check for short writes when sending the response in nscd
* nscd/grpcache.c (cache_addgr): Properly check for short write. * nscd/initgrcache.c (addinitgroupsX): Likewise. * nscd/pwdcache.c (cache_addpw): Likewise. * nscd/servicescache.c (cache_addserv): Likewise. Don't write more than recsize.
Diffstat (limited to 'nscd/servicescache.c')
-rw-r--r--nscd/servicescache.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/nscd/servicescache.c b/nscd/servicescache.c
index d29cde7d63..b16f9e5866 100644
--- a/nscd/servicescache.c
+++ b/nscd/servicescache.c
@@ -65,6 +65,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
const void *key, struct servent *serv, uid_t owner,
struct hashentry *const he, struct datahead *dh, int errval)
{
+ bool all_written = true;
ssize_t total;
ssize_t written;
time_t t = time (NULL);
@@ -290,14 +291,14 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
{
assert (db->wr_fd != -1);
assert ((char *) &dataset->resp > (char *) db->data);
- assert ((char *) &dataset->resp - (char *) db->head
+ assert ((char *) dataset - (char *) db->head
+ total
<= (sizeof (struct database_pers_head)
+ db->head->module * sizeof (ref_t)
+ db->head->data_size));
written = sendfileall (fd, db->wr_fd,
(char *) &dataset->resp
- - (char *) db->head, total);
+ - (char *) db->head, dataset->head.recsize);
# ifndef __ASSUME_SENDFILE
if (written == -1 && errno == ENOSYS)
goto use_write;
@@ -308,7 +309,10 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
use_write:
# endif
#endif
- written = writeall (fd, &dataset->resp, total);
+ written = writeall (fd, &dataset->resp, dataset->head.recsize);
+
+ if (written != dataset->head.recsize)
+ all_written = false;
}
/* Add the record to the database. But only if it has not been
@@ -332,7 +336,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
}
}
- if (__builtin_expect (written != total, 0) && debug_level > 0)
+ if (__builtin_expect (!all_written, 0) && debug_level > 0)
{
char buf[256];
dbg_log (_("short write in %s: %s"), __FUNCTION__,