======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc5-syzkaller-00047-g5bd7ef53ffe5 #0 Not tainted
------------------------------------------------------
syz-executor182/10740 is trying to acquire lock:
ffff8880258c1670 (&rs->rs_recv_lock){...-}-{2:2}, at: rds_wake_sk_sleep+0x23/0xe0 net/rds/af_rds.c:109

but task is already holding lock:
ffff888071bc2900 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x155/0xa50 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+0x3a/0x50 kernel/locking/spinlock.c:162
       rds_message_purge net/rds/message.c:138 [inline]
       rds_message_put+0x1dd/0xc50 net/rds/message.c:180
       rds_inc_put+0x13c/0x1a0 net/rds/recv.c:83
       rds_clear_recv_queue+0x14c/0x350 net/rds/recv.c:768
       rds_release+0xdb/0x3c0 net/rds/af_rds.c:73
       __sock_release+0xae/0x260 net/socket.c:659
       sock_close+0x1c/0x20 net/socket.c:1419
       __fput+0x270/0xbb0 fs/file_table.c:394
       task_work_run+0x14d/0x240 kernel/task_work.c:180
       exit_task_work include/linux/task_work.h:38 [inline]
       do_exit+0xa92/0x2ae0 kernel/exit.c:871
       do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
       get_signal+0x23be/0x2790 kernel/signal.c:2904
       arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
       exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
       exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
       __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
       syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
       do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
       entry_SYSCALL_64_after_hwframe+0x63/0x6b

-> #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+0x2433/0x3b20 kernel/locking/lockdep.c:5137
       lock_acquire kernel/locking/lockdep.c:5754 [inline]
       lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
       __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
       _raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
       rds_wake_sk_sleep+0x23/0xe0 net/rds/af_rds.c:109
       rds_send_remove_from_sock+0x1e9/0xa50 net/rds/send.c:634
       rds_send_path_drop_acked+0x2f4/0x3c0 net/rds/send.c:710
       rds_tcp_write_space+0x1b5/0x6d0 net/rds/tcp_send.c:199
       tcp_new_space net/ipv4/tcp_input.c:5615 [inline]
       tcp_check_space+0x178/0x8c0 net/ipv4/tcp_input.c:5634
       tcp_data_snd_check net/ipv4/tcp_input.c:5643 [inline]
       tcp_rcv_established+0x953/0x20e0 net/ipv4/tcp_input.c:6161
       tcp_v4_do_rcv+0x68c/0xa10 net/ipv4/tcp_ipv4.c:1906
       sk_backlog_rcv include/net/sock.h:1121 [inline]
       __release_sock+0x132/0x3b0 net/core/sock.c:2968
       release_sock+0x5a/0x1f0 net/core/sock.c:3534
       rds_send_xmit+0x164f/0x2490 net/rds/send.c:422
       rds_sendmsg+0x2af0/0x31e0 net/rds/send.c:1381
       sock_sendmsg_nosec net/socket.c:730 [inline]
       __sock_sendmsg+0xd5/0x180 net/socket.c:745
       ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
       ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
       __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x63/0x6b

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 ***

3 locks held by syz-executor182/10740:
 #0: ffff88802ac6d3f0 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline]
 #0: ffff88802ac6d3f0 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sock_set_cork+0x1c/0x90 net/ipv4/tcp.c:3229
 #1: ffff88802ac6d678 (k-clock-AF_INET){++.-}-{2:2}, at: rds_tcp_write_space+0x29/0x6d0 net/rds/tcp_send.c:185
 #2: ffff888071bc2900 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x155/0xa50 net/rds/send.c:628

stack backtrace:
CPU: 0 PID: 10740 Comm: syz-executor182 Not tainted 6.7.0-rc5-syzkaller-00047-g5bd7ef53ffe5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 check_noncircular+0x317/0x400 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+0x2433/0x3b20 kernel/locking/lockdep.c:5137
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
 rds_wake_sk_sleep+0x23/0xe0 net/rds/af_rds.c:109
 rds_send_remove_from_sock+0x1e9/0xa50 net/rds/send.c:634
 rds_send_path_drop_acked+0x2f4/0x3c0 net/rds/send.c:710
 rds_tcp_write_space+0x1b5/0x6d0 net/rds/tcp_send.c:199
 tcp_new_space net/ipv4/tcp_input.c:5615 [inline]
 tcp_check_space+0x178/0x8c0 net/ipv4/tcp_input.c:5634
 tcp_data_snd_check net/ipv4/tcp_input.c:5643 [inline]
 tcp_rcv_established+0x953/0x20e0 net/ipv4/tcp_input.c:6161
 tcp_v4_do_rcv+0x68c/0xa10 net/ipv4/tcp_ipv4.c:1906
 sk_backlog_rcv include/net/sock.h:1121 [inline]
 __release_sock+0x132/0x3b0 net/core/sock.c:2968
 release_sock+0x5a/0x1f0 net/core/sock.c:3534
 rds_send_xmit+0x164f/0x2490 net/rds/send.c:422
 rds_sendmsg+0x2af0/0x31e0 net/rds/send.c:1381
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa066fa2729
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa066f42228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa06702c358 RCX: 00007fa066fa2729
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fa06702c350 R08: 00007fff7fc26027 R09: 00007fa066f426c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa06702c35c
R13: 00007fa066ff9074 R14: 0000040000000015 R15: 00007fff7fc26028
 </TASK>