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adamfeuer
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Sep 4, 2020
Note: dlsymtab is not in standards. but just in case. (gdb) bt #0 getpid () at task/task_getpid.c:91 #1 0x00000000004fbc9d in modlib_registry_lock () at modlib/modlib_registry.c:89 #2 0x0000000000719ee0 in modsym (handle=0xffffffffffffffff, name=0x7fa7ebdde8c7 "mmap") at module/mod_modsym.c:92 #3 0x000000000071597d in dlsym (handle=0xffffffffffffffff, name=0x7fa7ebdde8c7 "mmap") at dlfcn/lib_dlsym.c:164 #4 0x00007fa7ebdbeb39 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5 apache#5 0x00007fa7ebd79b28 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5 apache#6 0x00007fa7ebd9d7a7 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5 apache#7 0x00007fa7ec6ce03a in ?? () from /lib64/ld-linux-x86-64.so.2 apache#8 0x00007fa7ec6ce141 in ?? () from /lib64/ld-linux-x86-64.so.2 apache#9 0x00007fa7ec6be13a in ?? () from /lib64/ld-linux-x86-64.so.2 apache#10 0x0000000000000001 in ?? () apache#11 0x00007fff028f686b in ?? () apache#12 0x0000000000000000 in ?? () (gdb) quit
adamfeuer
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Nov 11, 2020
(gdb) b longjmp Breakpoint 1 at 0x8270 (gdb) r Starting program: /home/chao/code/m3/nuttx/nuttx [ 0.000000] Assertion failed at file:task/task_onexit.c line: 99 Breakpoint 1, 0xf7b905e0 in siglongjmp () from /lib/i386-linux-gnu/libc.so.6 (gdb) (gdb) bt |#0 0xf7b905e0 in siglongjmp () from /lib/i386-linux-gnu/libc.so.6 |#1 0xf7f9c3dc in siglongjmp_alias () from /lib/i386-linux-gnu/libpthread.so.0 |#2 0x5655d668 in up_assert (filename=0x56641018 "task/task_onexit.c", line=99) at sim/up_head.c:132 |#3 0x56567413 in _assert (filename=0x56641018 "task/task_onexit.c", linenum=99) at assert/lib_assert.c:36 |#4 0x565f8cfd in on_exit (func=0x565f8c12 <exitfunc>, arg=0x565fd780 <simuart_restoremode>) at task/task_onexit.c:99 |apache#5 0x565f8c89 in atexit (func=0x565fd780 <simuart_restoremode>) at task/task_atexit.c:109 |apache#6 0x565fd819 in simuart_start () at sim/up_simuart.c:112 |apache#7 0x5656c844 in up_uartinit () at sim/up_uart.c:496 |apache#8 0x5656ba7a in up_initialize () at sim/up_initialize.c:234 |apache#9 0x5655da56 in nx_start () at init/nx_start.c:701 |apache#10 0x5655d5e9 in main (argc=1, argv=0xffffd6f4, envp=0xffffd6fc) at sim/up_head.c:96 Change-Id: Ifd7196b2de7bf9fc7cea764c19a5c0eacf08fdb6 Signed-off-by: chao.an <[email protected]>
adamfeuer
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Aug 23, 2021
Deadlock during recursive access if unionfs overlays procfs, check the critical segment only and remove the useless protection part. |#0 unionfs_statfs (mountpt=0xf3df4540, buf=0xf3de2f0c) at unionfs/fs_unionfs.c:2136 ... |apache#6 0x08069429 in procfs_read (filep=0xf3df4574, buffer=0xf3df4610 "...", buflen=1024) at procfs/fs_procfs.c:412 |apache#7 0x0806c339 in unionfs_read (filep=0xf3de219c, buffer=0xf3df4610 "...", buflen=1024) at unionfs/fs_unionfs.c:1026 original call stack: (gdb) bt |#0 unionfs_statfs (mountpt=0xf3df4540, buf=0xf3de2f0c) at unionfs/fs_unionfs.c:2136 |#1 0x08071629 in mountpoint_filter (node=0xf3df4540, dirpath=0xf3df4a28 "/proc", arg=0xf3de2fc4) at mount/fs_foreachmountpoint.c:119 |#2 0x0807171b in foreach_inodelevel (node=0xf3df4540, info=0xf3df4a20) at inode/fs_foreachinode.c:90 |#3 0x08071898 in foreach_inode (handler=0x8071530 <mountpoint_filter>, arg=0xf3de2fc4) at inode/fs_foreachinode.c:193 |#4 0x080716c1 in foreach_mountpoint (handler=0x8070e2f <blocks_entry>, arg=0xf3de300c) at mount/fs_foreachmountpoint.c:169 |apache#5 0x08071399 in mount_read (filep=0xf3df4574, buffer=0xf3df4610 "...", buflen=1024) at mount/fs_procfs_mount.c:537 |apache#6 0x08069429 in procfs_read (filep=0xf3df4574, buffer=0xf3df4610 "...", buflen=1024) at procfs/fs_procfs.c:412 |apache#7 0x0806c339 in unionfs_read (filep=0xf3de219c, buffer=0xf3df4610 "...", buflen=1024) at unionfs/fs_unionfs.c:1026 |apache#8 0x080657a2 in file_read (filep=0xf3de219c, buf=0xf3df4610, nbytes=1024) at vfs/fs_read.c:110 |apache#9 0x0806581a in nx_read (fd=3, buf=0xf3df4610, nbytes=1024) at vfs/fs_read.c:175 |apache#10 0x08065847 in read (fd=3, buf=0xf3df4610, nbytes=1024) at vfs/fs_read.c:206 |apache#11 0x0805a242 in nsh_catfile (vtbl=0xf3df3f10, cmd=0xf3df4378 "df", filepath=0x808d5ed "/proc/fs/blocks") at nsh_fsutils.c:116 |apache#12 0x0805b1de in cmd_df (vtbl=0xf3df3f10, argc=1, argv=0xf3de32c0) at nsh_mntcmds.c:73 |apache#13 0x08056370 in nsh_command (vtbl=0xf3df3f10, argc=1, argv=0xf3de32c0) at nsh_command.c:1061 |apache#14 0x08053b16 in nsh_execute (vtbl=0xf3df3f10, argc=1, argv=0xf3de32c0, redirfile=0x0, oflags=0) at nsh_parse.c:741 |apache#15 0x08055998 in nsh_parse_command (vtbl=0xf3df3f10, cmdline=0xf3df4378 "df") at nsh_parse.c:2578 |apache#16 0x08055a7b in nsh_parse (vtbl=0xf3df3f10, cmdline=0xf3df4378 "df") at nsh_parse.c:2662 |apache#17 0x0805d691 in nsh_session (pstate=0xf3df3f10, login=1 '\001', argc=1, argv=0xf3de34b0) at nsh_session.c:191 |apache#18 0x0805b542 in nsh_consolemain (argc=1, argv=0xf3de34b0) at nsh_consolemain.c:115 |apache#19 0x0805346c in nsh_main (argc=1, argv=0xf3de34b0) at nsh_main.c:168 |apache#20 0x0805075a in nxtask_startup (entrypt=0x805340a <nsh_main>, argc=1, argv=0xf3de34b0) at sched/task_startup.c:165 |apache#21 0x08049713 in nxtask_start () at task/task_start.c:144 |apache#22 0x00000000 in ?? () Change-Id: Ic4c7aff0ea50388a371c525745e817a787dabcca Signed-off-by: chao.an <[email protected]>
adamfeuer
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Nov 30, 2022
devif_conn_event() will be called recursively in the psock_send_eventhandler(),
if the tcp event tcp_close_eventhandler() is marked as "next" in first devif_conn_event()
and released from sencond recursive call, the "next" event in the first devif_conn_event()
will become a wild pointer.
479 uint16_t devif_conn_event(FAR struct net_driver_s *dev, uint16_t flags,
480 FAR struct devif_callback_s *list)
481 {
482 FAR struct devif_callback_s *next;
...
488 net_lock();
489 while (list && flags)
490 {
...
496 next = list->nxtconn; <------------------ event tcp_close_eventhandler() on next
...
500 if (list->event != NULL && devif_event_trigger(flags, list->flags))
501 {
...
507 flags = list->event(dev, list->priv, flags); <---------------- perform psock_send_eventhandler(), event tcp_close_eventhandler() will be remove from tcp_lost_connection()
508 }
...
512 list = next; <---------------- event tcp_close_eventhandler() has been released, wild pointer
513 }
514
515 net_unlock();
516 return flags;
517 }
The callstack as below:
Breakpoint 1, tcp_close_eventhandler (dev=0x56607d80 <g_sim_dev>, pvpriv=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_close.c:83
(gdb) bt
| #0 tcp_close_eventhandler (dev=0x56607d80 <g_sim_dev>, pvpriv=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_close.c:83
| #1 0x5658bb57 in devif_conn_event (dev=0x56607d80 <g_sim_dev>, flags=65, list=0x56609498 <g_cbprealloc+312>) at devif/devif_callback.c:507
----------------> devif_conn_event() recursively
| #2 0x56589f8c in tcp_callback (dev=0x56607d80 <g_sim_dev>, conn=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_callback.c:169
| #3 0x565c55e4 in tcp_shutdown_monitor (conn=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_monitor.c:211
| #4 0x565c584b in tcp_lost_connection (conn=0x566084a0 <g_tcp_connections>, cb=0x566094b0 <g_cbprealloc+336>, flags=65) at tcp/tcp_monitor.c:391
| apache#5 0x565c028a in psock_send_eventhandler (dev=0x56607d80 <g_sim_dev>, pvpriv=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_send_buffered.c:544
----------------> call psock_send_eventhandler() before tcp_close_eventhandler()
| apache#6 0x5658bb57 in devif_conn_event (dev=0x56607d80 <g_sim_dev>, flags=65, list=0x566094b0 <g_cbprealloc+336>) at devif/devif_callback.c:507
| apache#7 0x56589f8c in tcp_callback (dev=0x56607d80 <g_sim_dev>, conn=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_callback.c:169
| apache#8 0x5658e8cc in tcp_input (dev=0x56607d80 <g_sim_dev>, domain=2 '\002', iplen=20) at tcp/tcp_input.c:1059
| apache#9 0x5658ed77 in tcp_ipv4_input (dev=0x56607d80 <g_sim_dev>) at tcp/tcp_input.c:1355
| apache#10 0x5658c0a2 in ipv4_input (dev=0x56607d80 <g_sim_dev>) at devif/ipv4_input.c:358
| apache#11 0x56577017 in netdriver_recv_work (arg=0x56607d80 <g_sim_dev>) at sim/up_netdriver.c:182
| apache#12 0x5655999e in work_thread (argc=2, argv=0xf3db5dd0) at wqueue/kwork_thread.c:178
| apache#13 0x5655983f in nxtask_start () at task/task_start.c:129
(gdb) c
Continuing.
Breakpoint 1, tcp_close_eventhandler (dev=0x56607d80 <g_sim_dev>, pvpriv=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_close.c:83
(gdb) bt
| #0 tcp_close_eventhandler (dev=0x56607d80 <g_sim_dev>, pvpriv=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_close.c:83
----------------------> "next" corrupted, invaild call tcp_close_eventhandler()
| #1 0x5658bb57 in devif_conn_event (dev=0x56607d80 <g_sim_dev>, flags=65, list=0x56609498 <g_cbprealloc+312>) at devif/devif_callback.c:507
| #2 0x56589f8c in tcp_callback (dev=0x56607d80 <g_sim_dev>, conn=0x566084a0 <g_tcp_connections>, flags=65) at tcp/tcp_callback.c:169
| #3 0x5658e8cc in tcp_input (dev=0x56607d80 <g_sim_dev>, domain=2 '\002', iplen=20) at tcp/tcp_input.c:1059
| #4 0x5658ed77 in tcp_ipv4_input (dev=0x56607d80 <g_sim_dev>) at tcp/tcp_input.c:1355
| apache#5 0x5658c0a2 in ipv4_input (dev=0x56607d80 <g_sim_dev>) at devif/ipv4_input.c:358
| apache#6 0x56577017 in netdriver_recv_work (arg=0x56607d80 <g_sim_dev>) at sim/up_netdriver.c:182
| apache#7 0x5655999e in work_thread (argc=2, argv=0xf3db5dd0) at wqueue/kwork_thread.c:178
| apache#8 0x5655983f in nxtask_start () at task/task_start.c:129
(gdb) c
Continuing.
[ 2.680000] up_assert: Assertion failed at file:devif/devif_callback.c line: 85 task: lpwork
Signed-off-by: chao.an <[email protected]>
adamfeuer
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Nov 30, 2022
==2117790==ERROR: AddressSanitizer: global-buffer-overflow on address 0x64d9e3c0 at pc 0x59ac4e16 bp 0xcefe8058 sp 0xcefe8048
READ of size 1 at 0x64d9e3c0 thread T0
#0 0x59ac4e15 in up_nputs sim/up_nputs.c:54
#1 0x59a67e4c in syslog_default_write syslog/syslog_channel.c:220
#2 0x59a67823 in syslog_default_write syslog/syslog_write.c:101
#3 0x59a67f10 in syslog_write syslog/syslog_write.c:153
#4 0x59a651c3 in syslogstream_flush syslog/syslog_stream.c:60
apache#5 0x59a6564e in syslogstream_addchar syslog/syslog_stream.c:104
apache#6 0x59a6576f in syslogstream_putc syslog/syslog_stream.c:140
apache#7 0x5989fc4d in vsprintf_internal stdio/lib_libvsprintf.c:952
apache#8 0x598a1298 in lib_vsprintf stdio/lib_libvsprintf.c:1379
apache#9 0x59a64ea4 in nx_vsyslog syslog/vsyslog.c:223
apache#10 0x598a601a in vsyslog syslog/lib_syslog.c:68
apache#11 0x59b0e3dc in AIOTJS::logPrintf(int, char const*, ...) src/ajs_log.cpp:45
apache#12 0x59b03d56 in jse_dump_obj src/jse/quickjs/jse_quickjs.cpp:569
apache#13 0x59b03ea1 in jse_dump_error1(JSContext*, unsigned long long) src/jse/quickjs/jse_quickjs.cpp:602
apache#14 0x59b03dd9 in jse_dump_error(JSContext*) src/jse/quickjs/jse_quickjs.cpp:591
apache#15 0x59bed615 in ferry::DomComponent::callHook(char const*) src/framework/dom/component.cpp:65
apache#16 0x59bfe0ff in ferry::DomComponent::initialize() src/framework/dom/component.cpp:645
apache#17 0x59bb141d in dom_create_component(JSContext*, unsigned long long, unsigned long long, unsigned long long) (/home/wangbowen/project/central/vela_miot_bes_m0/bin/audio+0x365c41d)
apache#18 0x59b4c0d3 in AIOTJS::__createComponent(JSContext*, unsigned long long, int, unsigned long long*) (/home/wangbowen/project/central/vela_miot_bes_m0/bin/audio+0x35f70d3)
apache#19 0x5a56ec17 in js_call_c_function quickjs/quickjs.c:16108
Signed-off-by: wangbowen6 <[email protected]>
adamfeuer
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Nov 30, 2022
apps/examples/usrsocktest/usrsocktest_basic_daemon.c:
321 static void basic_daemon_dup2(FAR struct usrsocktest_daemon_conf_s *dconf)
322 {
...
335 ret = dup2(sd2, sd);
352 }
Usrsocktest Task hold the file group lock and send the close request to usrsock deamon :
| #0 net_lockedwait_uninterruptible (sem=0x5555555f8ba2 <g_usrsockdev+34>) at utils/net_lock.c:427
| #1 0x000055555557489c in usrsockdev_do_request (conn=0x5555555f8800 <g_usrsock_connections>, iov=0x7ffff3f36040, iovcnt=1) at usrsock/usrsock_dev.c:1185
| --> send close request to usrsock deamon
|
| #2 0x00005555555d0439 in do_close_request (conn=0x5555555f8800 <g_usrsock_connections>) at usrsock/usrsock_close.c:109
| #3 0x00005555555d04f5 in usrsock_close (conn=0x5555555f8800 <g_usrsock_connections>) at usrsock/usrsock_close.c:157
| #4 0x00005555555cf100 in usrsock_sockif_close (psock=0x7ffff3ea4a60) at usrsock/usrsock_sockif.c:234
| apache#5 0x00005555555c7b2f in psock_close (psock=0x7ffff3ea4a60) at socket/net_close.c:102
| apache#6 0x000055555557a518 in sock_file_close (filep=0x7ffff3f253d0) at socket/socket.c:115
| apache#7 0x000055555557678f in file_close (filep=0x7ffff3f253d0) at vfs/fs_close.c:74
| apache#8 0x000055555557694c in file_dup2 (filep1=0x7ffff3f253e8, filep2=0x7ffff3f253d0) at vfs/fs_dup2.c:129
| ---> hold group file list lock ( _files_semtake(list) )
|
| apache#9 0x0000555555575aab in nx_dup2 (fd1=7, fd2=6) at inode/fs_files.c:451
| apache#10 0x0000555555575af3 in dup2 (fd1=7, fd2=6) at inode/fs_files.c:473
| apache#11 0x000055555559d937 in basic_daemon_dup2 (dconf=0x5555555f8d80 <usrsocktest_daemon_config>) at usrsocktest_basic_daemon.c:335
| apache#12 0x000055555559ed80 in usrsocktest_test_basic_daemon_basic_daemon_dup2 () at usrsocktest_basic_daemon.c:612
| apache#13 0x000055555559f18d in usrsocktest_group_basic_daemon_run () at usrsocktest_basic_daemon.c:666
| apache#14 0x0000555555599f8d in run_tests (name=0x5555555dc8c3 "basic_daemon", test_fn=0x55555559ef50 <usrsocktest_group_basic_daemon_run>) at usrsocktest_main.c:117
| apache#15 0x000055555559a06c in run_all_tests () at usrsocktest_main.c:154
| apache#16 0x000055555559a3d1 in usrsocktest_main (argc=1, argv=0x7ffff3f25450) at usrsocktest_main.c:248
| apache#17 0x000055555555cad8 in nxtask_startup (entrypt=0x55555559a357 <usrsocktest_main>, argc=1, argv=0x7ffff3f25450) at sched/task_startup.c:70
| apache#18 0x0000555555559938 in nxtask_start () at task/task_start.c:134
Usrsock Deamon weakup and setup the poll want to perform close request, but locked on fs_getfilep():
| #0 _files_semtake (list=0x7ffff3f250b8) at inode/fs_files.c:51
| --> Request group lock but which hold by close request, deadlock
| #1 0x00005555555758b1 in fs_getfilep (fd=5, filep=0x7ffff3f47190) at inode/fs_files.c:375
| #2 0x00005555555d3064 in poll_fdsetup (fd=5, fds=0x7ffff3f47290, setup=true) at vfs/fs_poll.c:79
| #3 0x00005555555d3243 in poll_setup (fds=0x7ffff3f47290, nfds=2, sem=0x7ffff3f47206) at vfs/fs_poll.c:139
| #4 0x00005555555d39a6 in nx_poll (fds=0x7ffff3f47290, nfds=2, timeout=-1) at vfs/fs_poll.c:383
| apache#5 0x00005555555d3abd in poll (fds=0x7ffff3f47290, nfds=2, timeout=-1) at vfs/fs_poll.c:501
| --> daemon weak up
| apache#6 0x00005555555c62c7 in usrsocktest_daemon (param=0x5555555f5360 <g_ub_daemon>) at usrsocktest_daemon.c:1846
| apache#7 0x000055555559161e in pthread_startup (entry=0x5555555c60d3 <usrsocktest_daemon>, arg=0x5555555f5360 <g_ub_daemon>) at pthread/pthread_create.c:59
| apache#8 0x00005555555d45f0 in pthread_start () at pthread/pthread_create.c:175
| apache#9 0x0000000000000000 in ?? ()
Signed-off-by: chao an <[email protected]>
adamfeuer
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Nov 30, 2022
I noticed that the conn instance will leak during stress test, The close work queued from tcp_close_eventhandler() will be canceled by tcp_timer() immediately: Breakpoint 1, tcp_close_eventhandler (dev=0x565cd338 <up_irq_restore+108>, pvpriv=0x5655e6ff <getpid+12>, flags=0) at tcp/tcp_close.c:71 (gdb) bt | #0 tcp_close_eventhandler (dev=0x565cd338 <up_irq_restore+108>, pvpriv=0x5655e6ff <getpid+12>, flags=0) at tcp/tcp_close.c:71 | #1 0x5658bf1e in devif_conn_event (dev=0x5660bd80 <g_sim_dev>, flags=512, list=0x5660d558 <g_cbprealloc+312>) at devif/devif_callback.c:508 | #2 0x5658a219 in tcp_callback (dev=0x5660bd80 <g_sim_dev>, conn=0x5660c4a0 <g_tcp_connections>, flags=512) at tcp/tcp_callback.c:167 | #3 0x56589253 in tcp_timer (dev=0x5660bd80 <g_sim_dev>, conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_timer.c:378 | #4 0x5658dd47 in tcp_poll (dev=0x5660bd80 <g_sim_dev>, conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_devpoll.c:95 | apache#5 0x5658b95f in devif_poll_tcp_connections (dev=0x5660bd80 <g_sim_dev>, callback=0x565770f2 <netdriver_txpoll>) at devif/devif_poll.c:601 | apache#6 0x5658b9ea in devif_poll (dev=0x5660bd80 <g_sim_dev>, callback=0x565770f2 <netdriver_txpoll>) at devif/devif_poll.c:722 | apache#7 0x56577230 in netdriver_txavail_work (arg=0x5660bd80 <g_sim_dev>) at sim/up_netdriver.c:308 | apache#8 0x5655999e in work_thread (argc=2, argv=0xf3db5dd0) at wqueue/kwork_thread.c:178 | apache#9 0x5655983f in nxtask_start () at task/task_start.c:129 (gdb) c Continuing. Breakpoint 2, tcp_update_timer (conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_timer.c:178 (gdb) bt | #0 tcp_update_timer (conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_timer.c:178 | #1 0x5658952a in tcp_timer (dev=0x5660bd80 <g_sim_dev>, conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_timer.c:708 | #2 0x5658dd47 in tcp_poll (dev=0x5660bd80 <g_sim_dev>, conn=0x5660c4a0 <g_tcp_connections>) at tcp/tcp_devpoll.c:95 | #3 0x5658b95f in devif_poll_tcp_connections (dev=0x5660bd80 <g_sim_dev>, callback=0x565770f2 <netdriver_txpoll>) at devif/devif_poll.c:601 | #4 0x5658b9ea in devif_poll (dev=0x5660bd80 <g_sim_dev>, callback=0x565770f2 <netdriver_txpoll>) at devif/devif_poll.c:722 | apache#5 0x56577230 in netdriver_txavail_work (arg=0x5660bd80 <g_sim_dev>) at sim/up_netdriver.c:308 | apache#6 0x5655999e in work_thread (argc=2, argv=0xf3db5dd0) at wqueue/kwork_thread.c:178 | apache#7 0x5655983f in nxtask_start () at task/task_start.c:129 Since a separate work will add 24 bytes to each conn instance, but in order to support the feature of asynchronous close(), I can not find a better way than adding a separate work, for resource constraints, I recommend the developers to enable CONFIG_NET_ALLOC_CONNS, which will reduce the ram usage. Signed-off-by: chao an <[email protected]>
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Summary
Add files from https://github.com/PeterBee97/authors-tool