BUG: sleeping function called from invalid context at net/core/sock.c:3283 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7768, name: syz.3.823 7 locks held by syz.3.823/7768: #0: ffff8000162921a8 (sock_diag_mutex){+.+.}-{3:3}, at: sock_diag_rcv+0x2c/0x54 net/core/sock_diag.c:275 #1: ffff800016292068 (sock_diag_table_mutex){+.+.}-{3:3}, at: __sock_diag_cmd net/core/sock_diag.c:229 [inline] #1: ffff800016292068 (sock_diag_table_mutex){+.+.}-{3:3}, at: sock_diag_rcv_msg+0x214/0x390 net/core/sock_diag.c:265 #2: ffff0000d0555690 (nlk_cb_mutex-SOCK_DIAG){+.+.}-{3:3}, at: __netlink_dump_start+0x108/0x6f0 net/netlink/af_netlink.c:2334 #3: ffff800016369088 (inet_diag_table_mutex){+.+.}-{3:3}, at: inet_diag_lock_handler net/ipv4/inet_diag.c:63 [inline] #3: ffff800016369088 (inet_diag_table_mutex){+.+.}-{3:3}, at: __inet_diag_dump+0x170/0x350 net/ipv4/inet_diag.c:1177 #4: ffff8000143311e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #5: ffff0000c563ac98 (&h->lhash2[i].lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline] #5: ffff0000c563ac98 (&h->lhash2[i].lock){+.+.}-{2:2}, at: mptcp_diag_dump_listeners net/mptcp/mptcp_diag.c:95 [inline] #5: ffff0000c563ac98 (&h->lhash2[i].lock){+.+.}-{2:2}, at: mptcp_diag_dump+0x830/0x10f0 net/mptcp/mptcp_diag.c:194 #6: ffff0000c1c60d20 (msk_lock-AF_INET){+.+.}-{0:0}, at: inet_sk_diag_fill+0xbb4/0x1584 net/ipv4/inet_diag.c:342 Preemption disabled at: [] spin_lock include/linux/spinlock.h:363 [inline] [] mptcp_diag_dump_listeners net/mptcp/mptcp_diag.c:95 [inline] [] mptcp_diag_dump+0x830/0x10f0 net/mptcp/mptcp_diag.c:194 CPU: 1 PID: 7768 Comm: syz.3.823 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 ___might_sleep+0x358/0x4d4 kernel/sched/core.c:9639 __might_sleep+0x98/0x124 kernel/sched/core.c:9593 __lock_sock_fast+0x3c/0xec net/core/sock.c:3283 lock_sock_fast include/net/sock.h:1728 [inline] mptcp_diag_get_info+0x204/0x868 net/mptcp/mptcp_diag.c:224 inet_sk_diag_fill+0xbb4/0x1584 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+0xb5c/0x10f0 net/mptcp/mptcp_diag.c:194 __inet_diag_dump+0x1dc/0x350 net/ipv4/inet_diag.c:1179 inet_diag_dump+0x4c/0x5c net/ipv4/inet_diag.c:1198 netlink_dump+0x49c/0xab4 net/netlink/af_netlink.c:2265 __netlink_dump_start+0x480/0x6f0 net/netlink/af_netlink.c:2368 netlink_dump_start include/linux/netlink.h:258 [inline] inet_diag_handler_cmd+0x190/0x268 net/ipv4/inet_diag.c:1344 sock_diag_rcv_msg+0x168/0x390 net/core/sock_diag.c:-1 netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2489 sock_diag_rcv+0x3c/0x54 net/core/sock_diag.c:276 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x60c/0x89c net/netlink/af_netlink.c:1337 netlink_sendmsg+0x6e8/0x9cc net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] sock_write_iter+0x23c/0x31c net/socket.c:1079 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1 do_iter_write+0x1c4/0x670 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_writev+0x1e0/0x380 fs/read_write.c:971 __do_sys_writev fs/read_write.c:1044 [inline] __se_sys_writev fs/read_write.c:1041 [inline] __arm64_sys_writev+0x80/0x94 fs/read_write.c:1041 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584