diff options
author | Petr Baudis <pasky@suse.cz> | 2009-07-16 10:10:10 -0700 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 2009-07-16 10:10:10 -0700 |
commit | 137028b4d7e50f71906c1656c27079eac5a1d085 (patch) | |
tree | 61b121088c68e50ff2483cd15675729cf3c337e7 /nscd | |
parent | 50158f95525ca59459a90f2a7bc65ceb892a0807 (diff) | |
download | glibc-137028b4d7e50f71906c1656c27079eac5a1d085.tar glibc-137028b4d7e50f71906c1656c27079eac5a1d085.tar.gz glibc-137028b4d7e50f71906c1656c27079eac5a1d085.tar.bz2 glibc-137028b4d7e50f71906c1656c27079eac5a1d085.zip |
Fix lock handling in memory hander of nscd.
The commit 20e498bd removes the pthread_mutex_rdlock() calls, but not the
corresponding pthread_mutex_unlock() calls. Also, the database lock is never
unlocked in one branch of the mempool_alloc() if.
I think unreproducible random assert(dh->usable) crashes in prune_cache() were
caused by this. But an easy way to make nscd threads hang with the broken
locking was.
Diffstat (limited to 'nscd')
-rw-r--r-- | nscd/aicache.c | 2 | ||||
-rw-r--r-- | nscd/grpcache.c | 6 | ||||
-rw-r--r-- | nscd/hstcache.c | 4 | ||||
-rw-r--r-- | nscd/initgrcache.c | 4 | ||||
-rw-r--r-- | nscd/mem.c | 6 | ||||
-rw-r--r-- | nscd/pwdcache.c | 6 | ||||
-rw-r--r-- | nscd/servicescache.c | 4 |
7 files changed, 5 insertions, 27 deletions
diff --git a/nscd/aicache.c b/nscd/aicache.c index 524c0a63af..8dac48e5c2 100644 --- a/nscd/aicache.c +++ b/nscd/aicache.c @@ -543,8 +543,6 @@ next_nip: (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, uid, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; diff --git a/nscd/grpcache.c b/nscd/grpcache.c index 184d53898c..fc2008449e 100644 --- a/nscd/grpcache.c +++ b/nscd/grpcache.c @@ -146,8 +146,6 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; @@ -367,12 +365,10 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, (void) cache_add (GETGRBYGID, cp, key_offset, &dataset->head, false, db, owner, false); } - - out: - pthread_rwlock_unlock (&db->lock); } } +out: if (__builtin_expect (written != total, 0) && debug_level > 0) { char buf[256]; diff --git a/nscd/hstcache.c b/nscd/hstcache.c index 51e2273960..77ffcdf880 100644 --- a/nscd/hstcache.c +++ b/nscd/hstcache.c @@ -153,8 +153,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; @@ -404,8 +402,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, owner, he == NULL); - - pthread_rwlock_unlock (&db->lock); } } diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c index c33aaf315f..f8d4742d16 100644 --- a/nscd/initgrcache.c +++ b/nscd/initgrcache.c @@ -230,8 +230,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, uid, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; @@ -388,8 +386,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, (void) cache_add (INITGROUPS, cp, req->key_len, &dataset->head, true, db, uid, he == NULL); - - pthread_rwlock_unlock (&db->lock); } } diff --git a/nscd/mem.c b/nscd/mem.c index fcea6dbd03..80ea951146 100644 --- a/nscd/mem.c +++ b/nscd/mem.c @@ -566,9 +566,6 @@ mempool_alloc (struct database_dyn *db, size_t len, int data_alloc) } } - if (data_alloc) - pthread_rwlock_unlock (&db->lock); - if (! db->last_alloc_failed) { dbg_log (_("no more memory for database '%s'"), dbnames[db - dbs]); @@ -591,5 +588,8 @@ mempool_alloc (struct database_dyn *db, size_t len, int data_alloc) pthread_mutex_unlock (&db->memlock); + if (data_alloc) + pthread_rwlock_unlock (&db->lock); + return res; } diff --git a/nscd/pwdcache.c b/nscd/pwdcache.c index 2338e7e1e0..fc5b44eef0 100644 --- a/nscd/pwdcache.c +++ b/nscd/pwdcache.c @@ -153,8 +153,6 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, owner, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; @@ -362,12 +360,10 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, (void) cache_add (GETPWBYUID, cp, key_offset, &dataset->head, false, db, owner, false); } - - out: - pthread_rwlock_unlock (&db->lock); } } +out: if (__builtin_expect (written != total, 0) && debug_level > 0) { char buf[256]; diff --git a/nscd/servicescache.c b/nscd/servicescache.c index dc98d3005a..c965c972a3 100644 --- a/nscd/servicescache.c +++ b/nscd/servicescache.c @@ -136,8 +136,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); - pthread_rwlock_unlock (&db->lock); - /* Mark the old entry as obsolete. */ if (dh != NULL) dh->usable = false; @@ -317,8 +315,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, owner, he == NULL); - - pthread_rwlock_unlock (&db->lock); } } |