forked from pool/glibc
Andreas Schwab
0dad0ee03b
timeout - Properly check for short writes when sending the response in nscd OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=246
179 lines
5.9 KiB
Diff
179 lines
5.9 KiB
Diff
From 5a7b70c87c5ba03a122db0372e87ecb550ee4b38 Mon Sep 17 00:00:00 2001
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From: Andreas Schwab <schwab@suse.de>
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Date: Tue, 4 Dec 2012 16:14:13 +0100
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Subject: [PATCH] Properly check for short writes when sending the response in
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nscd
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* nscd/grpcache.c (cache_addgr): Properly check for short write.
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* nscd/initgrcache.c (addinitgroupsX): Likewise.
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* nscd/pwdcache.c (cache_addpw): Likewise.
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* nscd/servicescache.c (cache_addserv): Likewise. Don't write
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more than recsize.
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---
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nscd/grpcache.c | 6 +++++-
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nscd/initgrcache.c | 7 ++++++-
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nscd/pwdcache.c | 8 ++++++--
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nscd/servicescache.c | 12 ++++++++----
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4 files changed, 25 insertions(+), 8 deletions(-)
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diff --git a/nscd/grpcache.c b/nscd/grpcache.c
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index f0dad4d..696162f 100644
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--- a/nscd/grpcache.c
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+++ b/nscd/grpcache.c
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@@ -75,6 +75,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req,
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const void *key, struct group *grp, uid_t owner,
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struct hashentry *const he, struct datahead *dh, int errval)
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{
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+ bool all_written = true;
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ssize_t total;
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ssize_t written;
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time_t t = time (NULL);
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@@ -342,6 +343,9 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req,
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# endif
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#endif
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written = writeall (fd, &dataset->resp, dataset->head.recsize);
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+
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+ if (written != dataset->head.recsize)
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+ all_written = false;
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}
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/* Add the record to the database. But only if it has not been
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@@ -401,7 +405,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req,
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}
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}
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- if (__builtin_expect (written != total, 0) && debug_level > 0)
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+ if (__builtin_expect (!all_written, 0) && debug_level > 0)
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{
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char buf[256];
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dbg_log (_("short write in %s: %s"), __FUNCTION__,
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diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c
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index 255b121..13ee86e 100644
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--- a/nscd/initgrcache.c
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+++ b/nscd/initgrcache.c
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@@ -171,10 +171,12 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
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nip = nip->next;
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}
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+ bool all_written;
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ssize_t total;
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ssize_t written;
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time_t timeout;
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out:
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+ all_written = true;
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timeout = MAX_TIMEOUT_VALUE;
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if (!any_success)
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{
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@@ -379,6 +381,9 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
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# endif
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#endif
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written = writeall (fd, &dataset->resp, dataset->head.recsize);
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+
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+ if (written != dataset->head.recsize)
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+ all_written = false;
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}
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@@ -405,7 +410,7 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
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free (groups);
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- if (__builtin_expect (written != total, 0) && debug_level > 0)
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+ if (__builtin_expect (!all_written, 0) && debug_level > 0)
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{
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char buf[256];
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dbg_log (_("short write in %s: %s"), __FUNCTION__,
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diff --git a/nscd/pwdcache.c b/nscd/pwdcache.c
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index a8ea407..d6b91ef 100644
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--- a/nscd/pwdcache.c
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+++ b/nscd/pwdcache.c
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@@ -81,6 +81,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req,
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const void *key, struct passwd *pwd, uid_t owner,
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struct hashentry *const he, struct datahead *dh, int errval)
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{
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+ bool all_written = true;
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ssize_t total;
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ssize_t written;
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time_t t = time (NULL);
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@@ -306,7 +307,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req,
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+ db->head->data_size));
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written = sendfileall (fd, db->wr_fd,
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(char *) &dataset->resp
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- - (char *) db->head, dataset->head.recsize );
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+ - (char *) db->head, dataset->head.recsize);
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# ifndef __ASSUME_SENDFILE
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if (written == -1 && errno == ENOSYS)
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goto use_write;
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@@ -318,6 +319,9 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req,
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# endif
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#endif
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written = writeall (fd, &dataset->resp, dataset->head.recsize);
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+
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+ if (written != dataset->head.recsize)
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+ all_written = false;
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}
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@@ -377,7 +381,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req,
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}
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}
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- if (__builtin_expect (written != total, 0) && debug_level > 0)
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+ if (__builtin_expect (!all_written, 0) && debug_level > 0)
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{
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char buf[256];
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dbg_log (_("short write in %s: %s"), __FUNCTION__,
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diff --git a/nscd/servicescache.c b/nscd/servicescache.c
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index 0e7520d..917daa4 100644
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--- a/nscd/servicescache.c
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+++ b/nscd/servicescache.c
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@@ -65,6 +65,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
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const void *key, struct servent *serv, uid_t owner,
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struct hashentry *const he, struct datahead *dh, int errval)
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{
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+ bool all_written = true;
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ssize_t total;
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ssize_t written;
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time_t t = time (NULL);
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@@ -290,14 +291,14 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
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{
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assert (db->wr_fd != -1);
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assert ((char *) &dataset->resp > (char *) db->data);
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- assert ((char *) &dataset->resp - (char *) db->head
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+ assert ((char *) dataset - (char *) db->head
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+ total
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<= (sizeof (struct database_pers_head)
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+ db->head->module * sizeof (ref_t)
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+ db->head->data_size));
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written = sendfileall (fd, db->wr_fd,
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(char *) &dataset->resp
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- - (char *) db->head, total);
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+ - (char *) db->head, dataset->head.recsize);
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# ifndef __ASSUME_SENDFILE
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if (written == -1 && errno == ENOSYS)
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goto use_write;
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@@ -308,7 +309,10 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
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use_write:
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# endif
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#endif
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- written = writeall (fd, &dataset->resp, total);
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+ written = writeall (fd, &dataset->resp, dataset->head.recsize);
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+
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+ if (written != dataset->head.recsize)
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+ all_written = false;
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}
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/* Add the record to the database. But only if it has not been
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@@ -332,7 +336,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req,
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}
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}
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- if (__builtin_expect (written != total, 0) && debug_level > 0)
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+ if (__builtin_expect (!all_written, 0) && debug_level > 0)
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{
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char buf[256];
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dbg_log (_("short write in %s: %s"), __FUNCTION__,
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--
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1.8.0.1
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