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author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2009-12-03 13:33:16 +0100 |
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committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2009-12-03 13:33:16 +0100 |
commit | b3d31460fbf188997c7337296a61409529f7c974 (patch) | |
tree | b451066b5b869f1d6941d5232ba4f97ad8e56c00 /libc/pwd_grp/putpwent.c | |
parent | b93ab6041d56a5a19d8a97b69f6e3202fd11e859 (diff) |
ldso_tls: Refetch dtv from memory if THREAD_DTV has changed
_dl_update_slotinfo might change THREAD_DTV () (if it needs to reallocate it),
but the caller (__tls_get_addr) doesn't refetch dtv from memory, it uses its
cached copy. This may crash (if dtv[GET_ADDR_MODULE] is off the cliff, or
might read uninitialized memory and return it.
Typically dtv[GET_ADDR_MODULE].pointer.val is NULL and so __tls_get_addr
returns NULL + offset_within_PT_TLS. The next time __tls_get_addr is called
for the same library it will return correct address as _dl_update_slotinfo
won't need to be called.
Signed-off-by: Jakub Jelinek <jakub@redhat.com>
Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/pwd_grp/putpwent.c')
0 files changed, 0 insertions, 0 deletions