BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.2/4563 caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62 CPU: 0 PID: 4563 Comm: syz-executor.2 Not tainted 4.4.174+ #4 0000000000000000 26e4326ca71c9af9 ffff8801d1117990 ffffffff81aad1a1 ffff8801d1908000 0000000000000000 ffffffff82a861e0 ffffffff8292c040 0000000000000002 ffff8801d11179d0 ffffffff81b0ad83 ffffffff00000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62 [] tcp_prune_queue net/ipv4/tcp_input.c:4978 [inline] [] tcp_try_rmem_schedule+0x1a1/0x1280 net/ipv4/tcp_input.c:4386 [] tcp_send_rcvq+0x1d7/0x4a0 net/ipv4/tcp_input.c:4574 [] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134 [] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:648 [] SYSC_sendto net/socket.c:1678 [inline] [] SyS_sendto+0x201/0x340 net/socket.c:1646 [] entry_SYSCALL_64_fastpath+0x1e/0x9a BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.2/4563 caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62 CPU: 0 PID: 4563 Comm: syz-executor.2 Not tainted 4.4.174+ #4 0000000000000000 26e4326ca71c9af9 ffff8801d1117990 ffffffff81aad1a1 ffff8801d1908000 0000000000000000 ffffffff82a861e0 ffffffff8292c040 0000000000000002 ffff8801d11179d0 ffffffff81b0ad83 ffffffff00000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62 [] tcp_prune_queue net/ipv4/tcp_input.c:5011 [inline] [] tcp_try_rmem_schedule+0xf35/0x1280 net/ipv4/tcp_input.c:4386 [] tcp_send_rcvq+0x1d7/0x4a0 net/ipv4/tcp_input.c:4574 [] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134 [] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:648 [] SYSC_sendto net/socket.c:1678 [inline] [] SyS_sendto+0x201/0x340 net/socket.c:1646 [] entry_SYSCALL_64_fastpath+0x1e/0x9a audit: type=1400 audit(1573686804.919:12): avc: denied { create } for pid=4635 comm="syz-executor.3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1