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openSUSE:12.3
glibc-utils
nscd-short-write.patch
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File nscd-short-write.patch of Package glibc-utils
From 5a7b70c87c5ba03a122db0372e87ecb550ee4b38 Mon Sep 17 00:00:00 2001 From: Andreas Schwab <schwab@suse.de> Date: Tue, 4 Dec 2012 16:14:13 +0100 Subject: [PATCH] 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. --- nscd/grpcache.c | 6 +++++- nscd/initgrcache.c | 7 ++++++- nscd/pwdcache.c | 8 ++++++-- nscd/servicescache.c | 12 ++++++++---- 4 files changed, 25 insertions(+), 8 deletions(-) diff --git a/nscd/grpcache.c b/nscd/grpcache.c index f0dad4d..696162f 100644 --- a/nscd/grpcache.c +++ b/nscd/grpcache.c @@ -75,6 +75,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, const void *key, struct group *grp, 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); @@ -342,6 +343,9 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, # endif #endif 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 @@ -401,7 +405,7 @@ cache_addgr (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__, diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c index 255b121..13ee86e 100644 --- a/nscd/initgrcache.c +++ b/nscd/initgrcache.c @@ -171,10 +171,12 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, nip = nip->next; } + bool all_written; ssize_t total; ssize_t written; time_t timeout; out: + all_written = true; timeout = MAX_TIMEOUT_VALUE; if (!any_success) { @@ -379,6 +381,9 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, # endif #endif written = writeall (fd, &dataset->resp, dataset->head.recsize); + + if (written != dataset->head.recsize) + all_written = false; } @@ -405,7 +410,7 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, free (groups); - 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__, diff --git a/nscd/pwdcache.c b/nscd/pwdcache.c index a8ea407..d6b91ef 100644 --- a/nscd/pwdcache.c +++ b/nscd/pwdcache.c @@ -81,6 +81,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, const void *key, struct passwd *pwd, 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); @@ -306,7 +307,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, + db->head->data_size)); written = sendfileall (fd, db->wr_fd, (char *) &dataset->resp - - (char *) db->head, dataset->head.recsize ); + - (char *) db->head, dataset->head.recsize); # ifndef __ASSUME_SENDFILE if (written == -1 && errno == ENOSYS) goto use_write; @@ -318,6 +319,9 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, # endif #endif written = writeall (fd, &dataset->resp, dataset->head.recsize); + + if (written != dataset->head.recsize) + all_written = false; } @@ -377,7 +381,7 @@ cache_addpw (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__, diff --git a/nscd/servicescache.c b/nscd/servicescache.c index 0e7520d..917daa4 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__, -- 1.8.0.1
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