======================================================
WARNING: possible circular locking dependency detected
6.3.0-rc1-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/5986 is trying to acquire lock:
ffff88806dfdeaf0 (&rs->rs_recv_lock){...-}-{2:2}, at: rds_wake_sk_sleep+0x1e/0xc0 net/rds/af_rds.c:109

but task is already holding lock:
ffff888026436900 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x1e7/0x9a0 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+0x3d/0x60 kernel/locking/spinlock.c:162
       rds_message_purge net/rds/message.c:138 [inline]
       rds_message_put+0x171/0xab0 net/rds/message.c:180
       rds_clear_recv_queue+0x1c9/0x350 net/rds/recv.c:768
       rds_release+0xce/0x360 net/rds/af_rds.c:73
       __sock_release+0xbb/0x280 net/socket.c:653
       sock_close+0x13/0x20 net/socket.c:1395
       __fput+0x1fa/0x9a0 fs/file_table.c:321
       task_work_run+0x12f/0x220 kernel/task_work.c:179
       resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
       exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
       exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
       __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
       syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
       do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (&rs->rs_recv_lock){...-}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3098 [inline]
       check_prevs_add kernel/locking/lockdep.c:3217 [inline]
       validate_chain kernel/locking/lockdep.c:3832 [inline]
       __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
       lock_acquire kernel/locking/lockdep.c:5669 [inline]
       lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634
       __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
       _raw_read_lock_irqsave+0x49/0x90 kernel/locking/spinlock.c:236
       rds_wake_sk_sleep+0x1e/0xc0 net/rds/af_rds.c:109
       rds_send_remove_from_sock+0x256/0x9a0 net/rds/send.c:634
       rds_send_path_drop_acked+0x27a/0x360 net/rds/send.c:710
       rds_tcp_write_space+0x19a/0x5c0 net/rds/tcp_send.c:198
       tcp_new_space net/ipv4/tcp_input.c:5483 [inline]
       tcp_check_space+0xe2/0x730 net/ipv4/tcp_input.c:5502
       tcp_data_snd_check net/ipv4/tcp_input.c:5511 [inline]
       tcp_rcv_established+0x7b9/0x2290 net/ipv4/tcp_input.c:6019
       tcp_v4_do_rcv+0x53b/0x800 net/ipv4/tcp_ipv4.c:1721
       sk_backlog_rcv include/net/sock.h:1113 [inline]
       __release_sock+0x117/0x360 net/core/sock.c:2922
       release_sock+0x4e/0x170 net/core/sock.c:3489
       rds_send_xmit+0x882/0x2380 net/rds/send.c:422
       rds_sendmsg+0x1da3/0x29e0 net/rds/send.c:1381
       sock_sendmsg_nosec net/socket.c:724 [inline]
       sock_sendmsg+0xc0/0x150 net/socket.c:747
       __sys_sendto+0x1bf/0x290 net/socket.c:2142
       __do_sys_sendto net/socket.c:2154 [inline]
       __se_sys_sendto net/socket.c:2150 [inline]
       __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2150
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

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);
  lock(&rs->rs_recv_lock);

 *** DEADLOCK ***

3 locks held by syz-executor.0/5986:
 #0: ffff888028ecbe70 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
 #0: ffff888028ecbe70 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sock_set_cork+0x12/0x70 net/ipv4/tcp.c:3342
 #1: ffff888028ecc0f8 (k-clock-AF_INET){++.-}-{2:2}, at: rds_tcp_write_space+0x24/0x5c0 net/rds/tcp_send.c:184
 #2: ffff888026436900 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_send_remove_from_sock+0x1e7/0x9a0 net/rds/send.c:628

stack backtrace:
CPU: 0 PID: 5986 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106
 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3098 [inline]
 check_prevs_add kernel/locking/lockdep.c:3217 [inline]
 validate_chain kernel/locking/lockdep.c:3832 [inline]
 __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
 lock_acquire kernel/locking/lockdep.c:5669 [inline]
 lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0x49/0x90 kernel/locking/spinlock.c:236
 rds_wake_sk_sleep+0x1e/0xc0 net/rds/af_rds.c:109
 rds_send_remove_from_sock+0x256/0x9a0 net/rds/send.c:634
 rds_send_path_drop_acked+0x27a/0x360 net/rds/send.c:710
 rds_tcp_write_space+0x19a/0x5c0 net/rds/tcp_send.c:198
 tcp_new_space net/ipv4/tcp_input.c:5483 [inline]
 tcp_check_space+0xe2/0x730 net/ipv4/tcp_input.c:5502
 tcp_data_snd_check net/ipv4/tcp_input.c:5511 [inline]
 tcp_rcv_established+0x7b9/0x2290 net/ipv4/tcp_input.c:6019
 tcp_v4_do_rcv+0x53b/0x800 net/ipv4/tcp_ipv4.c:1721
 sk_backlog_rcv include/net/sock.h:1113 [inline]
 __release_sock+0x117/0x360 net/core/sock.c:2922
 release_sock+0x4e/0x170 net/core/sock.c:3489
 rds_send_xmit+0x882/0x2380 net/rds/send.c:422
 rds_sendmsg+0x1da3/0x29e0 net/rds/send.c:1381
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xc0/0x150 net/socket.c:747
 __sys_sendto+0x1bf/0x290 net/socket.c:2142
 __do_sys_sendto net/socket.c:2154 [inline]
 __se_sys_sendto net/socket.c:2150 [inline]
 __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2150
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c77a8c0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5c787d3168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f5c77babf80 RCX: 00007f5c77a8c0a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f5c77ae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5c1333cf R14: 00007f5c787d3300 R15: 0000000000022000
 </TASK>