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| author | DJ Delorie <dj@redhat.com> | 2019-06-28 18:30:00 -0500 |
|---|---|---|
| committer | DJ Delorie <dj@redhat.com> | 2019-07-10 14:51:18 -0400 |
| commit | 99135114ba23c3110b7e4e650fabdc5e639746b7 (patch) | |
| tree | 09e4349308db59321eddff440eadaa630f60575b /nss/nss_db/db-open.c | |
| parent | 30ba0375464f34e4bf8129f3d3dc14d0c09add17 (diff) | |
| download | glibc-99135114ba23c3110b7e4e650fabdc5e639746b7.tar.gz | |
nss_db: fix endent wrt NULL mappings [BZ #24695] [BZ #24696]
nss_db allows for getpwent et al to be called without a set*ent,
but it only works once. After the last get*ent a set*ent is
required to restart, because the end*ent did not properly reset
the module. Resetting it to NULL allows for a proper restart.
If the database doesn't exist, however, end*ent erroniously called
munmap which set errno.
The test case runs "makedb" inside the testroot, so needs selinux
DSOs installed.
Diffstat (limited to 'nss/nss_db/db-open.c')
| -rw-r--r-- | nss/nss_db/db-open.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/nss/nss_db/db-open.c b/nss/nss_db/db-open.c index 8a83d6b930..3fa11e9ab0 100644 --- a/nss/nss_db/db-open.c +++ b/nss/nss_db/db-open.c @@ -63,5 +63,9 @@ internal_setent (const char *file, struct nss_db_map *mapping) void internal_endent (struct nss_db_map *mapping) { - munmap (mapping->header, mapping->len); + if (mapping->header != NULL) + { + munmap (mapping->header, mapping->len); + mapping->header = NULL; + } } |