BUG: sleeping function called from invalid context at net/core/sock.c:3290
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4785, name: syz.3.142
7 locks held by syz.3.142/4785:
 #0: ffffffff8d456b68 (sock_diag_mutex){+.+.}-{3:3}, at: sock_diag_rcv+0x17/0x40 net/core/sock_diag.c:275
 #1: ffffffff8d456a28 (sock_diag_table_mutex){+.+.}-{3:3}, at: sock_diag_rcv_msg+0x142/0x3e0 net/core/sock_diag.c:255
 #2: ffff88807b1e6690 (nlk_cb_mutex-SOCK_DIAG){+.+.}-{3:3}, at: __netlink_dump_start+0xf5/0x720 net/netlink/af_netlink.c:2363
 #3: ffffffff8d5307a8 (inet_diag_table_mutex){+.+.}-{3:3}, at: inet_diag_lock_handler net/ipv4/inet_diag.c:63 [inline]
 #3: ffffffff8d5307a8 (inet_diag_table_mutex){+.+.}-{3:3}, at: __inet_diag_dump+0x181/0x380 net/ipv4/inet_diag.c:1177
 #4: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
 #5: ffffc90001726ae0 (&h->lhash2[i].lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:364 [inline]
 #5: ffffc90001726ae0 (&h->lhash2[i].lock){+.+.}-{2:2}, at: mptcp_diag_dump_listeners net/mptcp/mptcp_diag.c:95 [inline]
 #5: ffffc90001726ae0 (&h->lhash2[i].lock){+.+.}-{2:2}, at: mptcp_diag_dump+0x8f4/0x12a0 net/mptcp/mptcp_diag.c:194
 #6: ffff88807ad217a0 (msk_lock-AF_INET){+.+.}-{0:0}, at: inet_sk_diag_fill+0xe40/0x19d0 net/ipv4/inet_diag.c:342
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 4785 Comm: syz.3.142 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 ___might_sleep+0x493/0x610 kernel/sched/core.c:9658
 __lock_sock_fast+0x2f/0xe0 net/core/sock.c:3290
 lock_sock_fast include/net/sock.h:1778 [inline]
 mptcp_diag_get_info+0x1fe/0x9e0 net/mptcp/mptcp_diag.c:224
 inet_sk_diag_fill+0xe40/0x19d0 net/ipv4/inet_diag.c:342
 sk_diag_dump net/mptcp/mptcp_diag.c:24 [inline]
 mptcp_diag_dump_listeners net/mptcp/mptcp_diag.c:122 [inline]
 mptcp_diag_dump+0xcc2/0x12a0 net/mptcp/mptcp_diag.c:194
 __inet_diag_dump+0x1f6/0x380 net/ipv4/inet_diag.c:1179
 inet_diag_dump_compat+0x17e/0x220 net/ipv4/inet_diag.c:1288
 netlink_dump+0x6d2/0xdd0 net/netlink/af_netlink.c:2291
 __netlink_dump_start+0x4e4/0x720 net/netlink/af_netlink.c:2398
 netlink_dump_start include/linux/netlink.h:260 [inline]
 inet_diag_rcv_msg_compat+0x207/0x420 net/ipv4/inet_diag.c:1323
 sock_diag_rcv_msg+0x15c/0x3e0 net/core/sock_diag.c:-1
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2519
 sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:276
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2500
 __sys_sendmsg net/socket.c:2529 [inline]
 __do_sys_sendmsg net/socket.c:2538 [inline]
 __se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2ec088b159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2ebeac2028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2ec0b13090 RCX: 00007f2ec088b159
RDX: 0000000024008004 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f2ec092203b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ec0b13128 R14: 00007f2ec0b13090 R15: 00007ffe4c4950b8
 </TASK>