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A cstatus != 0 or a data.dsize != sizeof(uint32_t)
does not guarantee to have no received data referenced by data.dptr.
Therefore, make sure data.dptr is free'd.
Reusing the same data structure as data input and data output parameter
can lead to wrong results, especially when the output parameters value
is used to detect errors. Create the additional local variable outdata
to prevent this issue.
Signed-off-by: Swen Schillig <swen@linux.ibm.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Thu Apr 2 11:26:32 UTC 2020 on sn-devel-184
Found by "Christopher O Cowan - Christopher.O.Cowan@ibm.com" <Christopher.O.Cowan@ibm.com>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Following backtrace is observed on executing `smbstatus` with at least
one SMB client connection established:
PANIC: assert failed at ../../lib/dbwrap/dbwrap.c(82): rec->value_valid
PANIC (pid 350270): assert failed: rec->value_valid
BACKTRACE: 15 stack frames:
#0 /usr/local/lib/libsamba-util.so.0(log_stack_trace+0x1f)
[0x7fbbd9b32047]
#1 /usr/local/lib/libsmbconf.so.0(smb_panic_s3+0x74) [0x7fbbd9c1e6ff]
#2 /usr/local/lib/libsamba-util.so.0(smb_panic+0x28) [0x7fbbd9b32012]
#3 /usr/local/lib/samba/libdbwrap-
samba4.so(dbwrap_record_get_value+0x86) [0x7fbbd95800ac]
#4 /usr/local/lib/samba/libsmbd-base-samba4.so(+0x28f563)
[0x7fbbd999e563]
#5 /usr/local/lib/samba/libsamba-cluster-support-samba4.so(+0x7851)
[0x7fbbd92c7851]
#6 /usr/local/lib/samba/libsamba-cluster-support-
samba4.so(ctdbd_traverse+0x4ca) [0x7fbbd92cc641]
#7 /usr/local/lib/samba/libsamba-cluster-support-samba4.so(+0x73eb)
[0x7fbbd92c73eb]
#8 /usr/local/lib/samba/libsamba-cluster-support-samba4.so(+0x7a52)
[0x7fbbd92c7a52]
#9 /usr/local/lib/samba/libdbwrap-samba4.so(dbwrap_traverse_read+0x35)
[0x7fbbd9580de5]
#10 /usr/local/lib/samba/libsmbd-base-
samba4.so(smbXsrv_tcon_global_traverse+0xc5) [0x7fbbd999e7d9]
#11 smbstatus(connections_forall_read+0x114) [0x55d17872b8ee]
#12 smbstatus(main+0x7b2) [0x55d17872a2f3]
#13 /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fbbd93a21a3]
#14 smbstatus(_start+0x2e) [0x55d17872894e]
Can not dump core: corepath not set up
Assertion on rec->value_valid fails as it is uninitialized in the
following functions:
traverse_read_callback
traverse_persistent_callback_read
Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Jan 8 23:24:58 UTC 2020 on sn-devel-184
After dbwrap_record_storev()/delete(), dbwrap_record_get_value()
information is stale. Assert on the attempt to re-fetch data after it
became stale. This can't protect against someone copying the result
from dbwrap_record_get_value() somewhere else, but it's better than
nothing.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Fixes:
source3/lib/dbwrap/dbwrap_ctdb.c:530:39: warning: Access to field 'm_write' results in a dereference of a null pointer (loaded from field 'transaction') <--[clang]
if (pull_newest_from_marshall_buffer(ctx->transaction->m_write, key,
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Fixes:
source3/lib/dbwrap/dbwrap_ctdb.c:95:2: warning: Value stored to 'ret' is never read <--[clang]
ret = ctdbd_init_connection(mem_ctx,
^ ~~~~~~
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Sep 13 01:34:30 CEST 2018 on sn-devel-144
state->count wasn't incremented and is returned at the end of a
dbwrap_traverse().
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
NULL initialize pointers, check function return values, explicit
variable check against NULL.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This just moves the talloc_memdup() out of the if condition as per
README.Coding.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
With messages_ctdb, the global ctdb connection will change after fork.
Don't store the wrong parent connection across a fork. The alternative would
be to do a reinit on all dbwrap_ctdb databases, but that seems overkill
given that we only have one "standard" ctdb connection anyway.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Convert all implementors of dbwrap_store to a storev-style call
by using the dbwrap_merge_dbufs call
For dbwrap_tdb, this matches tdb_storev.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
ctdbd_db_attach() only needs to know the ctdb database model, not the
rest of the flags.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12891
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_private is much broader. Right now we implement the protocol
ourselves. In the future, we might switch to the native ctdb
client implementation defined in ctdb_client.h, but that's a
different project :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Jun 24 05:33:41 CEST 2017 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed May 10 03:25:40 CEST 2017 on sn-devel-144
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sun May 7 16:40:19 CEST 2017 on sn-devel-144
After initializing the async connection to ctdb we must set initialized
to true.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This mainly works like the sync version, but calls ctdbd_parse_send/recv
instead.
We use one global ctdb connection that is used exclusively for async
requests.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Pair-programmed-with: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
When fetching records from remote ctdb nodes via ctdbd_parse() or in
db_ctdb_traverse(), we already check for tombstone records and skip
them. This was originally also done for the ltdb checks.
See also bug: https://bugzilla.samba.org/show_bug.cgi?id=10008
(commit 1cae59ce11).
Commit 925625b528 reverted part of the
patch of bug 10008 due to a deadlock it introduced.
This patch re-introduces the consistent treatment of empty records in
the ltdb but avoids the deadlock by correctly signalling
NT_STATUS_NOT_FOUND if an empty record is found authoritatively in
the ltdb and not calling ctdb in this case.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12005
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Aug 9 04:38:44 CEST 2016 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue May 17 16:54:36 CEST 2016 on sn-devel-144
Another step towards making ctdbd_conn.c independent of messages.c. No call to
ctdb_conn_msg_ctx() anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This removes one circular dependency of dbwrap_ctdb to messages.c: No call to
messaging_ctdbd_connection() anymore from dbwrap_ctdb.c.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This minimizes the use of messaging_ctdbd_connection() to
db_open_ctx(). Next step will move this into db_open().
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This converts the "cstatus" parameter of ctdbd_control_local to what it is
defined as in the packet: int32_t. It was used inconsistently throughout the
code.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Mon Apr 25 21:54:24 CEST 2016 on sn-devel-144
2 effects: This removes the [un]become_root calls from ctdbd_conn,
and it makes it possible to re-use the traversal connections, should
the setup/teardown become a problem in the future.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
