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| author |   Siddhesh Poyarekar <siddhesh@redhat.com> | 2015-07-16 08:53:28 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2015-07-16 08:53:28 +0530 |
| commit | b632bdd3f7c0ba0c79f23f5e4404eebb87ebdaa8 (patch) | |
| tree | ac6ac90ea020f5d02ee411528ce2d165ca4ecc11 /elf/dl-open.c | |
| parent | Fix sparc build. (diff) | |
| download | glibc-b632bdd3f7c0ba0c79f23f5e4404eebb87ebdaa8.tar.gz glibc-b632bdd3f7c0ba0c79f23f5e4404eebb87ebdaa8.tar.bz2 glibc-b632bdd3f7c0ba0c79f23f5e4404eebb87ebdaa8.zip | |
Set NODELETE flag when opening already open objects with RTLD_NODELETE
The DF_1_NODELETE flag is set too late when opening a DSO, due to
which, if a DSO is already open, subsequently opening it with
RTLD_NODELETE fails to set the DF_1_NODELETE flag. This patch fixes
this by setting the flag immediately after bumping the opencount.
Verified on x86_64.
[BZ #18676]
* elf/tst-nodelete-opened.c: New test case.
* elf/tst-nodelete-opened-lib.c: New test case module.
* elf/Makefile (tests, modules-names): Use them.
* elf/dl-open.c (dl_open_worker): Set DF_1_NODELETE flag
early.
Diffstat (limited to 'elf/dl-open.c')
| -rw-r--r-- | elf/dl-open.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/elf/dl-open.c b/elf/dl-open.c index 027c1e0eda..2db1c02148 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -226,6 +226,12 @@ dl_open_worker (void *a) args->map = new = _dl_map_object (call_map, file, lt_loaded, 0, mode | __RTLD_CALLMAP, args->nsid); + /* Mark the object as not deletable if the RTLD_NODELETE flags was passed. + Do this early so that we don't skip marking the object if it was + already loaded. */ + if (__glibc_unlikely (mode & RTLD_NODELETE)) + new->l_flags_1 |= DF_1_NODELETE; + /* If the pointer returned is NULL this means the RTLD_NOLOAD flag is set and the object is not already loaded. */ if (new == NULL) @@ -564,11 +570,6 @@ TLS generation counter wrapped! Please report this.")); /* It failed. */ return; - /* Mark the object as not deletable if the RTLD_NODELETE flags was - passed. */ - if (__glibc_unlikely (mode & RTLD_NODELETE)) - new->l_flags_1 |= DF_1_NODELETE; - #ifndef SHARED /* We must be the static _dl_open in libc.a. A static program that has loaded a dynamic object now has competition. */ |