BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor3/18614 caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 CPU: 1 PID: 18614 Comm: syz-executor3 Not tainted 4.4.113-g962d1f3 #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 b4a8c59226c7548b ffff8800a8c27800 ffffffff81d028ed 0000000000000001 ffffffff839fe3a0 ffffffff83cef6a0 ffff8801d3f45f00 0000000000000003 ffff8800a8c27840 ffffffff81d62834 ffffffff810002b8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46 [] ? 0xffffffff810002b8 [] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 [] tcp_try_coalesce+0x249/0x4d0 net/ipv4/tcp_input.c:4278 [] tcp_queue_rcv+0x127/0x720 net/ipv4/tcp_input.c:4485 [] tcp_send_rcvq+0x39b/0x450 net/ipv4/tcp_input.c:4531 [] tcp_sendmsg+0x1e8f/0x2b10 net/ipv4/tcp.c:1134 [] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:635 [] SYSC_sendto+0x2c8/0x340 net/socket.c:1665 [] SyS_sendto+0x40/0x50 net/socket.c:1633 [] entry_SYSCALL_64_fastpath+0x1c/0x98 binder_alloc: binder_alloc_mmap_handler: 18624 20000000-20002000 already mapped failed -16 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 19120 Comm: syz-executor7 Not tainted 4.4.113-g962d1f3 #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 2b7ab0050ff39dec ffff8801c417f580 ffffffff81d028ed ffff8800b1f03b00 1ffff1003882febd ffff8801c417f708 0000000000000000 0000000000000000 ffff8801c417f730 ffffffff81605ec5 ffffffff81236530 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] handle_userfault+0x715/0xf50 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2938/0x3190 mm/memory.c:3455 [] __do_page_fault+0x35b/0xa00 arch/x86/mm/fault.c:1245 [] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1033 [] generic_perform_write+0x1eb/0x530 mm/filemap.c:2540 [] __generic_file_write_iter+0x35a/0x580 mm/filemap.c:2675 [] generic_file_write_iter+0x2f1/0x720 mm/filemap.c:2703 [] new_sync_write fs/read_write.c:478 [inline] [] __vfs_write+0x33c/0x450 fs/read_write.c:491 [] vfs_write+0x18a/0x530 fs/read_write.c:538 [] SYSC_write fs/read_write.c:585 [inline] [] SyS_write+0xd9/0x1b0 fs/read_write.c:577 [] entry_SYSCALL_64_fastpath+0x1c/0x98 binder: 19151:19158 ERROR: BC_REGISTER_LOOPER called without request binder: 19151:19169 got reply transaction with no transaction stack binder: 19151:19169 transaction failed 29201/-71, size 721-8 line 2921 binder: undelivered TRANSACTION_ERROR: 29201 binder: 19151:19169 IncRefs 0 refcount change on invalid ref 1 ret -22 binder: 19151:19169 ERROR: BC_REGISTER_LOOPER called without request netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. binder: 19359:19362 ERROR: BC_REGISTER_LOOPER called without request binder: 19359:19365 unknown command 0 binder: 19359:19365 ioctl c0306201 20007000 returned -22 binder: 19359:19365 ioctl c0306201 20005fd0 returned -14 binder: 19359:19365 got reply transaction with no transaction stack binder: 19359:19365 transaction failed 29201/-71, size 32-8 line 2921 binder: BINDER_SET_CONTEXT_MGR already set binder: 19359:19367 ioctl 40046207 0 returned -16 binder: 19359:19367 unknown command 0 binder: 19359:19367 ioctl c0306201 20007000 returned -22 binder: 19359:19367 ioctl c0306201 20005fd0 returned -14 binder: undelivered TRANSACTION_ERROR: 29201 netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1400 audit(1517365075.580:88): avc: denied { create } for pid=19589 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_scsitransport_socket permissive=1 netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. Empty option to dns_resolver key TCP: request_sock_TCPv6: Possible SYN flooding on port 20022. Sending cookies. Check SNMP counters. netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'. TCP: request_sock_TCPv6: Possible SYN flooding on port 20022. Sending cookies. Check SNMP counters. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. binder: 20003:20015 transaction failed 29189/-22, size 0-0 line 3005 binder: 20003:20015 transaction failed 29189/-22, size 0-0 line 3005 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 l2tp_core: tunl 2: fd 19 wrong protocol, got 1, expected 17 l2tp_core: tunl 2: fd 20 wrong protocol, got 1, expected 17 device gre0 entered promiscuous mode audit: type=1401 audit(1517365078.390:89): op=setxattr invalid_context="/dev/snd/timer" audit: type=1401 audit(1517365078.430:90): op=setxattr invalid_context="/dev/snd/timer" device syz5 entered promiscuous mode device syz5 left promiscuous mode device syz5 entered promiscuous mode device syz5 left promiscuous mode audit: type=1326 audit(1517365079.270:91): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=20413 comm="syz-executor5" exe="/root/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517365079.350:92): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=20413 comm="syz-executor5" exe="/root/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 syz-executor4 (20546) used greatest stack depth: 22056 bytes left TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket