wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc8-syzkaller-00101-g0802e17d9aca #0 Not tainted
------------------------------------------------------
kworker/u4:1/12 is trying to acquire lock:
ffff0000cc5beaf0 (&rs->rs_recv_lock){....}-{2:2}, at: rds_wake_sk_sleep+0x34/0xc8 net/rds/af_rds.c:109

but task is already holding lock:
ffff0000d0071100 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x134/0x78c net/rds/send.c:628

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&rm->m_rs_lock){..-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
       rds_message_purge net/rds/message.c:138 [inline]
       rds_message_put+0x130/0xb30 net/rds/message.c:180
       rds_loop_inc_free+0x20/0x30 net/rds/loop.c:115
       rds_inc_put net/rds/recv.c:83 [inline]
       rds_clear_recv_queue+0x288/0x384 net/rds/recv.c:768
       rds_release+0xbc/0x2d0 net/rds/af_rds.c:73
       __sock_release net/socket.c:659 [inline]
       sock_close+0xa4/0x1e8 net/socket.c:1419
       __fput+0x308/0x8e4 fs/file_table.c:394
       __fput_sync+0x60/0x9c fs/file_table.c:475
       __do_sys_close fs/open.c:1587 [inline]
       __se_sys_close fs/open.c:1572 [inline]
       __arm64_sys_close+0x150/0x1e0 fs/open.c:1572
       __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
       el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
       el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
       el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

-> #0 (&rs->rs_recv_lock){....}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137
       lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
       __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
       _raw_read_lock_irqsave+0x6c/0x8c kernel/locking/spinlock.c:236
       rds_wake_sk_sleep+0x34/0xc8 net/rds/af_rds.c:109
       rds_send_remove_from_sock+0x1a4/0x78c net/rds/send.c:634
       rds_send_path_drop_acked+0x390/0x3f0 net/rds/send.c:710
       rds_tcp_write_space+0x1a8/0x598 net/rds/tcp_send.c:199
       tcp_new_space net/ipv4/tcp_input.c:5633 [inline]
       tcp_check_space+0x150/0x888 net/ipv4/tcp_input.c:5652
       tcp_data_snd_check net/ipv4/tcp_input.c:5661 [inline]
       tcp_rcv_established+0xe5c/0x1ff0 net/ipv4/tcp_input.c:6179
       tcp_v4_do_rcv+0x3b0/0xe08 net/ipv4/tcp_ipv4.c:1906
       sk_backlog_rcv include/net/sock.h:1121 [inline]
       __release_sock+0x1a8/0x408 net/core/sock.c:2968
       release_sock+0x68/0x1b8 net/core/sock.c:3534
       tcp_sock_set_cork+0x100/0x188 net/ipv4/tcp.c:3231
       rds_tcp_xmit_path_complete+0x7c/0x8c net/rds/tcp_send.c:52
       rds_send_xmit+0x197c/0x22a8 net/rds/send.c:422
       rds_send_worker+0x84/0x36c net/rds/threads.c:200
       process_one_work+0x694/0x1204 kernel/workqueue.c:2627
       process_scheduled_works kernel/workqueue.c:2700 [inline]
       worker_thread+0x938/0xef4 kernel/workqueue.c:2781
       kthread+0x288/0x310 kernel/kthread.c:388
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rm->m_rs_lock);
                               lock(&rs->rs_recv_lock);
                               lock(&rm->m_rs_lock);
  rlock(&rs->rs_recv_lock);

 *** DEADLOCK ***

5 locks held by kworker/u4:1/12:
 #0: ffff0000d2362938 ((wq_completion)krdsd){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2600
 #1: ffff800092fb7c20 ((work_completion)(&(&cp->cp_send_w)->work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2602
 #2: ffff0000e1b66330 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline]
 #2: ffff0000e1b66330 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sock_set_cork+0x38/0x188 net/ipv4/tcp.c:3229
 #3: ffff0000e1b665b8 (k-clock-AF_INET){++.-}-{2:2}, at: rds_tcp_write_space+0x38/0x598 net/rds/tcp_send.c:185
 #4: ffff0000d0071100 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x134/0x78c net/rds/send.c:628

stack backtrace:
CPU: 1 PID: 12 Comm: kworker/u4:1 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: krdsd rds_send_worker
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2060
 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0x6c/0x8c kernel/locking/spinlock.c:236
 rds_wake_sk_sleep+0x34/0xc8 net/rds/af_rds.c:109
 rds_send_remove_from_sock+0x1a4/0x78c net/rds/send.c:634
 rds_send_path_drop_acked+0x390/0x3f0 net/rds/send.c:710
 rds_tcp_write_space+0x1a8/0x598 net/rds/tcp_send.c:199
 tcp_new_space net/ipv4/tcp_input.c:5633 [inline]
 tcp_check_space+0x150/0x888 net/ipv4/tcp_input.c:5652
 tcp_data_snd_check net/ipv4/tcp_input.c:5661 [inline]
 tcp_rcv_established+0xe5c/0x1ff0 net/ipv4/tcp_input.c:6179
 tcp_v4_do_rcv+0x3b0/0xe08 net/ipv4/tcp_ipv4.c:1906
 sk_backlog_rcv include/net/sock.h:1121 [inline]
 __release_sock+0x1a8/0x408 net/core/sock.c:2968
 release_sock+0x68/0x1b8 net/core/sock.c:3534
 tcp_sock_set_cork+0x100/0x188 net/ipv4/tcp.c:3231
 rds_tcp_xmit_path_complete+0x7c/0x8c net/rds/tcp_send.c:52
 rds_send_xmit+0x197c/0x22a8 net/rds/send.c:422
 rds_send_worker+0x84/0x36c net/rds/threads.c:200
 process_one_work+0x694/0x1204 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:2781
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857