BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/21086 caller is __this_cpu_preempt_check+0x13/0x20 /syzkaller/managers/android-44-kasan-gce/kernel/lib/smp_processor_id.c:62 CPU: 1 PID: 21086 Comm: syz-executor4 Not tainted 4.4.104-ged884eb #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 3af38c4f0159ca8f ffff8801d569f828 ffffffff81cc9b0f 0000000000000001 ffffffff839fd4a0 ffff8801d569f868 ffffffff81d28d18 ffffffff83cecfa0 1ffff1003aad3f14 ffff8801d6798fc0 ffff8801d6799d40 Call Trace: [] __dump_stack /syzkaller/managers/android-44-kasan-gce/kernel/lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf /syzkaller/managers/android-44-kasan-gce/kernel/lib/dump_stack.c:51 [] check_preemption_disabled+0x1b8/0x1f0 /syzkaller/managers/android-44-kasan-gce/kernel/lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x13/0x20 /syzkaller/managers/android-44-kasan-gce/kernel/lib/smp_processor_id.c:62 [] tcp_try_coalesce+0x200/0x4b0 /syzkaller/managers/android-44-kasan-gce/kernel/net/ipv4/tcp_input.c:4278 [] tcp_queue_rcv+0xfe/0x720 /syzkaller/managers/android-44-kasan-gce/kernel/net/ipv4/tcp_input.c:4485 [] tcp_send_rcvq+0x391/0x4a0 /syzkaller/managers/android-44-kasan-gce/kernel/net/ipv4/tcp_input.c:4531 [] tcp_sendmsg+0x1d1c/0x36a0 /syzkaller/managers/android-44-kasan-gce/kernel/net/ipv4/tcp.c:1134 [] inet_sendmsg+0x26c/0x430 /syzkaller/managers/android-44-kasan-gce/kernel/net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec /syzkaller/managers/android-44-kasan-gce/kernel/net/socket.c:625 [inline] [] sock_sendmsg+0xb5/0xf0 /syzkaller/managers/android-44-kasan-gce/kernel/net/socket.c:635 [] SYSC_sendto+0x267/0x300 /syzkaller/managers/android-44-kasan-gce/kernel/net/socket.c:1665 [] SyS_sendto+0x9/0x10 /syzkaller/managers/android-44-kasan-gce/kernel/net/socket.c:1633 [] entry_SYSCALL_64_fastpath+0x16/0x76 nla_parse: 16 callbacks suppressed netlink: 17 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. PF_BRIDGE: RTM_SETLINK with unknown ifindex PF_BRIDGE: RTM_SETLINK with unknown ifindex device gre0 entered promiscuous mode device gre0 entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=50147 sclass=netlink_route_socket SELinux: unrecognized netlink message: protocol=0 nlmsg_type=50147 sclass=netlink_route_socket nla_parse: 16 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. device gre0 entered promiscuous mode netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. device gre0 entered promiscuous mode netlink: 17 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor4'. device gre0 entered promiscuous mode netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. device gre0 entered promiscuous mode netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. device gre0 entered promiscuous mode PF_BRIDGE: RTM_SETLINK with unknown ifindex netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. PF_BRIDGE: RTM_SETLINK with unknown ifindex device gre0 entered promiscuous mode