samba.git/source3/lib/dbwrap, branch talloc-2.3.4 Unnamed repository; edit this file 'description' to name the repository. dbwrap: Remove unused dbwrap_watched_wakeup() 2021-11-11T19:08:37+00:00 Volker Lendecke vl@samba.org 2021-10-22T11:32:36+00:00 69546f56fe8e259246ce0136471569c621b9f5a5 Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> 
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
s3/lib/dbwrap: check if global_messaging_context() succeeded 2021-08-17T10:31:29+00:00 Ralph Boehme slow@samba.org 2021-08-07T10:51:38+00:00 fd19cae8d2f21977d8285efd3f29e2b480d241e9 The subsequent messaging_ctdb_connection() will fail an assert if messaging is not up and running, maybe it's a bit better to add a check if global_messaging_context() actually succeeded. BUG: https://bugzilla.samba.org/show_bug.cgi?id=14787 Signed-off-by: Ralph Boehme <slow@samba.org> Reviewed-by: Andreas Schneider <asn@samba.org> 
The subsequent messaging_ctdb_connection() will fail an assert if messaging is
not up and running, maybe it's a bit better to add a check if
global_messaging_context() actually succeeded.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14787

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
dbwrap_ctdb: Remove "tryonly" from fetch_locked_internal() 2021-06-04T16:47:34+00:00 Volker Lendecke vl@samba.org 2020-12-21T14:37:21+00:00 3f4d85f749cd47cd7d1372ef400acc664f1c7840 Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> 
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
dbwrap: Remove "db_context->try_fetch_locked()" fn pointer 2021-06-04T16:47:34+00:00 Volker Lendecke vl@samba.org 2020-12-21T13:40:47+00:00 a41af25ebd424184ceb300a181cbfca7a9eb014c Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> 
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
lib: give global_contexts.c its own header file 2021-01-08T20:31:33+00:00 Volker Lendecke vl@samba.org 2021-01-03T20:53:49+00:00 d82acf7685fe0b02013794263df61c479162dd92 It's a bit shocking how many references we have to global contexts. Make this a bit more obvious. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> 
It's a bit shocking how many references we have to global
contexts. Make this a bit more obvious.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
s3:dbwrap_watch: avoid recursion into dbwrap_do_locked() from dbwrap_watched_do_locked_{storev,delete}() 2020-07-08T11:02:39+00:00 Stefan Metzmacher metze@samba.org 2020-05-14T11:32:47+00:00 4faab2a77a66497ea18ae6df8fee28e27dab1b4a This avoids a lot of overhead! Using smbtorture3 //foo/bar -U% local-g-lock-ping-pong -o 500000 under valgrind --tool=callgrind... This change replaces this: 6,877,542,529 PROGRAM TOTALS 590,000,773 lib/tdb/common/lock.c:tdb_lock_list 479,000,608 lib/tdb/common/lock.c:tdb_unlock 446,500,532 lib/tdb/common/io.c:tdb_read 364,000,824 lib/tdb/common/hash.c:tdb_jenkins_hash 285,000,532 lib/tdb/common/io.c:tdb_write 262,054,669 /x86_64/multiarch/memmove-vec-unaligned-erms.S:__memcpy_avx_unaligned_erms 206,500,496 lib/tdb/common/mutex.c:tdb_mutex_lock 193,000,176 lib/tdb/common/tdb.c:tdb_find 160,000,256 lib/talloc/talloc.c:_talloc_get_type_abort 148,500,297 lib/tdb/common/tdb.c:tdb_storev 140,000,196 lib/tdb/common/lock.c:tdb_lock 130,000,858 lib/util/debug.c:debuglevel_get_class 128,003,722 lib/talloc/talloc.c:_talloc_free 128,000,118 lib/tdb/common/tdb.c:tdb_parse_record 126,000,576 lib/tdb/common/lock.c:tdb_brlock.part.3 121,000,272 lib/tdb/common/mutex.c:tdb_mutex_unlock 118,000,225 /nptl/pthread_mutex_lock.c:__pthread_mutex_lock_full 112,750,222 lib/tdb/common/freelist.c:tdb_allocate_from_freelist 108,500,168 lib/tdb/common/io.c:tdb_ofs_read 102,500,000 lib/tdb/common/io.c:tdb_parse_data by this: 5,706,522,398 PROGRAM TOTALS 434,000,617 lib/tdb/common/lock.c:tdb_lock_list 389,500,494 lib/tdb/common/io.c:tdb_read 359,000,488 lib/tdb/common/lock.c:tdb_unlock 285,000,532 lib/tdb/common/io.c:tdb_write 237,554,655 /x86_64/multiarch/memmove-vec-unaligned-erms.S:__memcpy_avx_unaligned_erms 208,000,668 lib/tdb/common/hash.c:tdb_jenkins_hash 206,500,496 lib/tdb/common/mutex.c:tdb_mutex_lock 160,000,256 lib/talloc/talloc.c:_talloc_get_type_abort 148,500,297 lib/tdb/common/tdb.c:tdb_storev 136,000,132 lib/tdb/common/tdb.c:tdb_find 130,000,858 lib/util/debug.c:debuglevel_get_class 126,000,576 lib/tdb/common/lock.c:tdb_brlock.part.3 121,000,272 lib/tdb/common/mutex.c:tdb_mutex_unlock 118,000,225 /nptl/pthread_mutex_lock.c:__pthread_mutex_lock_full 112,750,222 lib/tdb/common/freelist.c:tdb_allocate_from_freelist 112,000,168 lib/tdb/common/lock.c:tdb_lock 94,500,154 lib/tdb/common/io.c:tdb_ofs_read 94,000,188 /nptl/pthread_mutex_unlock.c:__pthread_mutex_unlock_full 86,000,086 lib/dbwrap/dbwrap.c:dbwrap_lock_order_lock 83,000,083 lib/dbwrap/dbwrap_tdb.c:db_tdb_do_locked time smbtorture3 //foo/bar -U% local-g-lock-ping-pong -o 5000000 gives: 902834 locks/sec real 0m11,103s user 0m8,233s sys 0m2,868s vs. 1037262 locks/sec real 0m9,685s user 0m6,788s sys 0m2,896s Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Volker Lendecke <vl@samba.org> Autobuild-User(master): Volker Lendecke <vl@samba.org> Autobuild-Date(master): Wed Jul 8 11:02:39 UTC 2020 on sn-devel-184 
This avoids a lot of overhead!

Using smbtorture3 //foo/bar -U% local-g-lock-ping-pong -o 500000
under valgrind --tool=callgrind...

This change replaces this:

 6,877,542,529  PROGRAM TOTALS

   590,000,773  lib/tdb/common/lock.c:tdb_lock_list
   479,000,608  lib/tdb/common/lock.c:tdb_unlock
   446,500,532  lib/tdb/common/io.c:tdb_read
   364,000,824  lib/tdb/common/hash.c:tdb_jenkins_hash
   285,000,532  lib/tdb/common/io.c:tdb_write
   262,054,669  /x86_64/multiarch/memmove-vec-unaligned-erms.S:__memcpy_avx_unaligned_erms
   206,500,496  lib/tdb/common/mutex.c:tdb_mutex_lock
   193,000,176  lib/tdb/common/tdb.c:tdb_find
   160,000,256  lib/talloc/talloc.c:_talloc_get_type_abort
   148,500,297  lib/tdb/common/tdb.c:tdb_storev
   140,000,196  lib/tdb/common/lock.c:tdb_lock
   130,000,858  lib/util/debug.c:debuglevel_get_class
   128,003,722  lib/talloc/talloc.c:_talloc_free
   128,000,118  lib/tdb/common/tdb.c:tdb_parse_record
   126,000,576  lib/tdb/common/lock.c:tdb_brlock.part.3
   121,000,272  lib/tdb/common/mutex.c:tdb_mutex_unlock
   118,000,225  /nptl/pthread_mutex_lock.c:__pthread_mutex_lock_full
   112,750,222  lib/tdb/common/freelist.c:tdb_allocate_from_freelist
   108,500,168  lib/tdb/common/io.c:tdb_ofs_read
   102,500,000  lib/tdb/common/io.c:tdb_parse_data

by this:

 5,706,522,398  PROGRAM TOTALS

   434,000,617  lib/tdb/common/lock.c:tdb_lock_list
   389,500,494  lib/tdb/common/io.c:tdb_read
   359,000,488  lib/tdb/common/lock.c:tdb_unlock
   285,000,532  lib/tdb/common/io.c:tdb_write
   237,554,655  /x86_64/multiarch/memmove-vec-unaligned-erms.S:__memcpy_avx_unaligned_erms
   208,000,668  lib/tdb/common/hash.c:tdb_jenkins_hash
   206,500,496  lib/tdb/common/mutex.c:tdb_mutex_lock
   160,000,256  lib/talloc/talloc.c:_talloc_get_type_abort
   148,500,297  lib/tdb/common/tdb.c:tdb_storev
   136,000,132  lib/tdb/common/tdb.c:tdb_find
   130,000,858  lib/util/debug.c:debuglevel_get_class
   126,000,576  lib/tdb/common/lock.c:tdb_brlock.part.3
   121,000,272  lib/tdb/common/mutex.c:tdb_mutex_unlock
   118,000,225  /nptl/pthread_mutex_lock.c:__pthread_mutex_lock_full
   112,750,222  lib/tdb/common/freelist.c:tdb_allocate_from_freelist
   112,000,168  lib/tdb/common/lock.c:tdb_lock
    94,500,154  lib/tdb/common/io.c:tdb_ofs_read
    94,000,188  /nptl/pthread_mutex_unlock.c:__pthread_mutex_unlock_full
    86,000,086  lib/dbwrap/dbwrap.c:dbwrap_lock_order_lock
    83,000,083  lib/dbwrap/dbwrap_tdb.c:db_tdb_do_locked

time smbtorture3 //foo/bar -U% local-g-lock-ping-pong -o 5000000

gives:

  902834 locks/sec

 real    0m11,103s
 user    0m8,233s
 sys     0m2,868s

vs.

 1037262 locks/sec

 real    0m9,685s
 user    0m6,788s
 sys     0m2,896s

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Jul  8 11:02:39 UTC 2020 on sn-devel-184
lib: Allow DBWRAP_LOCK_ORDER_NONE in db_open() 2020-05-15T00:48:32+00:00 Volker Lendecke vl@samba.org 2019-11-21T14:20:33+00:00 66d62ed7978cc0bc1d7bb6c495e32738802f4420 locking.tdb will not have a LOCK_ORDER anymore, this will be done by the code in g_lock.c. We need to allow opening a database with dbwrap without having a lock order. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> 
locking.tdb will not have a LOCK_ORDER anymore, this will be done by
the code in g_lock.c. We need to allow opening a database with dbwrap
without having a lock order.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
lib: Fix a comment 2020-05-05T11:48:38+00:00 Volker Lendecke vl@samba.org 2020-04-28T14:55:55+00:00 0ad9273961bb0b14e78bd02e6062eb2bba45af47 The "deleted bit" went away with 341223a00596e Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org> 
The "deleted bit" went away with 341223a00596e

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
lib: Use ctdbd_req_send/recv in ctdb_parse_send/recv 2020-04-28T09:08:40+00:00 Volker Lendecke vl@samba.org 2020-03-11T10:03:06+00:00 296114cf47a38958f7c754b9cc1c26e59205bb71 Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org> 
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
dbwrap_watch: Set rec->value_valid while returning nested share_mode_do_locked() 2020-04-21T17:37:43+00:00 Anoop C S anoopcs@redhat.com 2020-04-20T09:11:18+00:00 5651fafe9856e69c93dba3efa6253780cf3c10a1 As reported on samba-technical by Rouven WEILER <Rouven_Weiler@gmx.net>: https://lists.samba.org/archive/samba-technical/2020-April/135116.html Following backtrace was observed with vfs_fruit for time machine backup: [2020/04/10 08:00:38.107917, 0] ../../lib/dbwrap/dbwrap.c:82(dbwrap_record_get_value) PANIC: assert failed at ../../lib/dbwrap/dbwrap.c(82): rec->value_valid [2020/04/10 08:00:38.108499, 0] ../../source3/lib/util.c:830(smb_panic_s3) PANIC (pid 3427): assert failed: rec->value_valid [2020/04/10 08:00:38.109541, 0] ../../lib/util/fault.c:265(log_stack_trace) BACKTRACE: 37 stack frames: #0 /usr/lib/samba/amd64/libsamba-util.so.0.0.1'log_stack_trace+0x26 [0xfffffd7fee51de66] #1 /usr/lib/samba/amd64/libsmbconf.so.0'smb_panic_s3+0x26 [0xfffffd7fedf5a596] #2 /usr/lib/samba/amd64/libsamba-util.so.0.0.1'smb_panic+0x1f [0xfffffd7fee51df3f] #3 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_record_get_value+0x2a [0xfffffd7feccb627a] #4 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'get_share_mode_lock+0x109 [0xfffffd7fee7195c9] #5 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_contend_level2_oplocks_begin+0xa1 [0xfffffd7fee7f7761] #6 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'brl_lock+0x635 [0xfffffd7fee710f45] #7 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'do_lock_fn+0xa4 [0xfffffd7fee70d534] #8 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'share_mode_do_locked_fn+0x86 [0xfffffd7fee7174b6] #9 /usr/lib/samba/amd64/libsmbconf.so.0'dbwrap_watched_do_locked_fn+0xfa [0xfffffd7fedf622ca] #10 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'db_tdb_do_locked+0x12f [0xfffffd7feccb95cf] #11 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_do_locked+0x48 [0xfffffd7feccb69a8] #12 /usr/lib/samba/amd64/libsmbconf.so.0'dbwrap_watched_do_locked+0x6f [0xfffffd7fedf60d7f] #13 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_do_locked+0x48 [0xfffffd7feccb69a8] #14 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'share_mode_do_locked+0xd2 [0xfffffd7fee719b82] #15 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'do_lock+0xf0 [0xfffffd7fee70dfe0] #16 /usr/lib/samba/amd64/vfs/fruit.so'fruit_create_file+0x7ba [0xfffffd7fe88855aa] #17 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_request_process_create+0xa07 [0xfffffd7fee7d3237] #18 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_request_dispatch+0xc8f [0xfffffd7fee7c985f] #19 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_connection_handler+0x621 [0xfffffd7fee7ca7e1] #20 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_invoke_fd_handler+0x80 [0xfffffd7fecd3a580] #21 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'epoll_event_loop_once+0x22c [0xfffffd7fecd4180c] #22 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_once+0x40 [0xfffffd7fecd3f8f0] #23 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'_tevent_loop_once+0x95 [0xfffffd7fecd39bd5] #24 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_loop_wait+0x23 [0xfffffd7fecd39e43] #25 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_wait+0x40 [0xfffffd7fecd3f870] #26 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_process+0x777 [0xfffffd7fee7b8677] #27 /usr/lib/samba/sbin/amd64/smbd'smbd_accept_connection+0x189 [0x40d5b9] #28 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_invoke_fd_handler+0x80 [0xfffffd7fecd3a580] #29 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'epoll_event_loop_once+0x22c [0xfffffd7fecd4180c] #30 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_once+0x40 [0xfffffd7fecd3f8f0] #31 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'_tevent_loop_once+0x95 [0xfffffd7fecd39bd5] #32 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_loop_wait+0x23 [0xfffffd7fecd39e43] #33 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_wait+0x40 [0xfffffd7fecd3f870] #34 /usr/lib/samba/sbin/amd64/smbd'main+0x1a0f [0x40f9ff] #35 /usr/lib/samba/sbin/amd64/smbd'_start_crt+0x83 [0x408e73] #36 /usr/lib/samba/sbin/amd64/smbd'_start+0x18 [0x408dd8] In this particular nested share_mode_do_locked() invocation, callback comes through dbwrap_watched_do_locked_fn() where it fails to update rec->value_valid which further gets assigned to static_share_mode_record within share_mode_do_locked_fn(). BUG: https://bugzilla.samba.org/show_bug.cgi?id=14352 Signed-off-by: Anoop C S <anoopcs@redhat.com> Reviewed-by: Ralph Boehme <slow@samba.org> Reviewed-by: Volker Lendecke <vl@samba.org> Autobuild-User(master): Ralph Böhme <slow@samba.org> Autobuild-Date(master): Tue Apr 21 17:37:43 UTC 2020 on sn-devel-184 
As reported on samba-technical by Rouven WEILER <Rouven_Weiler@gmx.net>:
https://lists.samba.org/archive/samba-technical/2020-April/135116.html

Following backtrace was observed with vfs_fruit for time machine backup:

[2020/04/10 08:00:38.107917,  0] ../../lib/dbwrap/dbwrap.c:82(dbwrap_record_get_value)
  PANIC: assert failed at ../../lib/dbwrap/dbwrap.c(82): rec->value_valid
[2020/04/10 08:00:38.108499,  0] ../../source3/lib/util.c:830(smb_panic_s3)
  PANIC (pid 3427): assert failed: rec->value_valid
[2020/04/10 08:00:38.109541,  0] ../../lib/util/fault.c:265(log_stack_trace)
  BACKTRACE: 37 stack frames:
   #0 /usr/lib/samba/amd64/libsamba-util.so.0.0.1'log_stack_trace+0x26 [0xfffffd7fee51de66]
   #1 /usr/lib/samba/amd64/libsmbconf.so.0'smb_panic_s3+0x26 [0xfffffd7fedf5a596]
   #2 /usr/lib/samba/amd64/libsamba-util.so.0.0.1'smb_panic+0x1f [0xfffffd7fee51df3f]
   #3 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_record_get_value+0x2a [0xfffffd7feccb627a]
   #4 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'get_share_mode_lock+0x109 [0xfffffd7fee7195c9]
   #5 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_contend_level2_oplocks_begin+0xa1 [0xfffffd7fee7f7761]
   #6 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'brl_lock+0x635 [0xfffffd7fee710f45]
   #7 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'do_lock_fn+0xa4 [0xfffffd7fee70d534]
   #8 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'share_mode_do_locked_fn+0x86 [0xfffffd7fee7174b6]
   #9 /usr/lib/samba/amd64/libsmbconf.so.0'dbwrap_watched_do_locked_fn+0xfa [0xfffffd7fedf622ca]
   #10 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'db_tdb_do_locked+0x12f [0xfffffd7feccb95cf]
   #11 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_do_locked+0x48 [0xfffffd7feccb69a8]
   #12 /usr/lib/samba/amd64/libsmbconf.so.0'dbwrap_watched_do_locked+0x6f [0xfffffd7fedf60d7f]
   #13 /usr/lib/samba/private/amd64/libdbwrap-samba4.so'dbwrap_do_locked+0x48 [0xfffffd7feccb69a8]
   #14 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'share_mode_do_locked+0xd2 [0xfffffd7fee719b82]
   #15 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'do_lock+0xf0 [0xfffffd7fee70dfe0]
   #16 /usr/lib/samba/amd64/vfs/fruit.so'fruit_create_file+0x7ba [0xfffffd7fe88855aa]
   #17 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_request_process_create+0xa07 [0xfffffd7fee7d3237]
   #18 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_request_dispatch+0xc8f [0xfffffd7fee7c985f]
   #19 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_smb2_connection_handler+0x621 [0xfffffd7fee7ca7e1]
   #20 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_invoke_fd_handler+0x80 [0xfffffd7fecd3a580]
   #21 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'epoll_event_loop_once+0x22c [0xfffffd7fecd4180c]
   #22 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_once+0x40 [0xfffffd7fecd3f8f0]
   #23 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'_tevent_loop_once+0x95 [0xfffffd7fecd39bd5]
   #24 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_loop_wait+0x23 [0xfffffd7fecd39e43]
   #25 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_wait+0x40 [0xfffffd7fecd3f870]
   #26 /usr/lib/samba/private/amd64/libsmbd-base-samba4.so'smbd_process+0x777 [0xfffffd7fee7b8677]
   #27 /usr/lib/samba/sbin/amd64/smbd'smbd_accept_connection+0x189 [0x40d5b9]
   #28 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_invoke_fd_handler+0x80 [0xfffffd7fecd3a580]
   #29 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'epoll_event_loop_once+0x22c [0xfffffd7fecd4180c]
   #30 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_once+0x40 [0xfffffd7fecd3f8f0]
   #31 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'_tevent_loop_once+0x95 [0xfffffd7fecd39bd5]
   #32 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'tevent_common_loop_wait+0x23 [0xfffffd7fecd39e43]
   #33 /usr/lib/samba/private/amd64/libtevent.so.0.10.2'std_event_loop_wait+0x40 [0xfffffd7fecd3f870]
   #34 /usr/lib/samba/sbin/amd64/smbd'main+0x1a0f [0x40f9ff]
   #35 /usr/lib/samba/sbin/amd64/smbd'_start_crt+0x83 [0x408e73]
   #36 /usr/lib/samba/sbin/amd64/smbd'_start+0x18 [0x408dd8]

In this particular nested share_mode_do_locked() invocation, callback
comes through dbwrap_watched_do_locked_fn() where it fails to update
rec->value_valid which further gets assigned to static_share_mode_record
within share_mode_do_locked_fn().

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14352

Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue Apr 21 17:37:43 UTC 2020 on sn-devel-184