BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor6/21727 caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 CPU: 0 PID: 21727 Comm: syz-executor6 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c32d76d8 ffffffff81d90889 0000000000000000 ffffffff83c17800 ffffffff83f42ec0 ffff8801c9d9e000 0000000000000003 ffff8801c32d7718 ffffffff81df7854 ffff8801c32d7730 ffffffff83f42ec0 dffffc0000000000[ 127.763838] binder_alloc: 21719: binder_alloc_buf size 69515765096 failed, no address space binder_alloc: allocated: 0 (num: 0 largest: 0), free: 8192 (num: 1 largest: 8192) binder: 21719:21729 transaction failed 29201/-28, size 69515765092-0 line 3130 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 binder: 21719:21741 ioctl 8924 20002000 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 21719:21729 ioctl 40046207 0 returned -16 binder: 21719:21741 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 21719: binder_alloc_buf, no vma binder: 21719:21741 transaction failed 29189/-3, size 69515765092-0 line 3130 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 [] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline] [] ipcomp_init_state+0x188/0x930 net/xfrm/xfrm_ipcomp.c:363 [] ipcomp4_init_state+0xb0/0x7d0 net/ipv4/ipcomp.c:137 [] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2096 [] xfrm_init_state+0x1a/0x20 net/xfrm/xfrm_state.c:2122 [] pfkey_msg2xfrm_state net/key/af_key.c:1281 [inline] [] pfkey_add+0x1fb9/0x3470 net/key/af_key.c:1498 [] pfkey_process+0x61e/0x730 net/key/af_key.c:2826 [] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3670 [] sock_sendmsg_nosec net/socket.c:635 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:645 [] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968 [] __sys_sendmsg+0xd6/0x190 net/socket.c:2002 [] SYSC_sendmsg net/socket.c:2013 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2009 [] entry_SYSCALL_64_fastpath+0x23/0xc6 BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor6/21727 caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 CPU: 1 PID: 21727 Comm: syz-executor6 Not tainted 4.9.68-gfb66dc2 #107 device gre0 entered promiscuous mode Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c32d76d8 ffffffff81d90889 0000000000000001 ffffffff83c17800 ffffffff83f42ec0 ffff8801c9d9e000 0000000000000003[ 128.129963] loop: Write error at byte offset 0, length 512. blk_update_request: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, lost async page write ffff8801c32d7718 ffffffff81df7854 ffff8801c32d7730 ffffffff83f42ec0 dffffc0000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 [] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline] [] ipcomp_init_state+0x188/0x930 net/xfrm/xfrm_ipcomp.c:363 [] ipcomp4_init_state+0xb0/0x7d0 net/ipv4/ipcomp.c:137 [] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2096 [] xfrm_init_state+0x1a/0x20 net/xfrm/xfrm_state.c:2122 [] pfkey_msg2xfrm_state net/key/af_key.c:1281 [inline] [] pfkey_add+0x1fb9/0x3470 net/key/af_key.c:1498 [] pfkey_process+0x61e/0x730 net/key/af_key.c:2826 audit: type=1400 audit(1513059445.872:64): avc: denied { getopt } for pid=21786 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_fib_lookup_socket permissive=1 loop: Write error at byte offset 0, length 512. blk_update_request: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, lost async page write [] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3670 [] sock_sendmsg_nosec net/socket.c:635 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:645 [] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968 [] __sys_sendmsg+0xd6/0x190 net/socket.c:2002 [] SYSC_sendmsg net/socket.c:2013 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2009 [] entry_SYSCALL_64_fastpath+0x23/0xc6 device lo entered promiscuous mode qtaguid: iface_stat: create(lo): no inet dev qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev device lo left promiscuous mode device lo entered promiscuous mode qtaguid: iface_stat: create(lo): no inet dev qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev device lo left promiscuous mode binder: 21879:21890 ioctl 40046205 0 returned -22 binder: 21879:21890 ERROR: BC_REGISTER_LOOPER called without request 9pnet_virtio: no channels available for device H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H binder_alloc: 21879: binder_alloc_buf, no vma binder: 21879:21905 transaction failed 29189/-3, size 0-0 line 3130 binder: 21879:21905 got reply transaction with no transaction stack binder: 21879:21905 transaction failed 29201/-71, size 24-8 line 2923 binder: 21879:21905 BC_FREE_BUFFER u0000000000000000 no match binder: 21879:21905 ioctl 40046205 6 returned -22 binder: 21879:21914 ioctl 40046205 0 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 21879:21905 ioctl 40046207 0 returned -16 binder: 21879:21914 ERROR: BC_REGISTER_LOOPER called without request binder: 21879:21914 ioctl c0306201 20008fd0 returned -11 binder_alloc: 21879: binder_alloc_buf, no vma binder: 21879:21905 transaction failed 29189/-3, size 0-0 line 3130 binder: 21879:21905 unknown command 1400526783 binder: 21879:21905 ioctl c0306201 20002fd0 returned -22 binder: 21879:21905 BC_FREE_BUFFER u0000000000000000 no match binder: 21879:21905 IncRefs 0 refcount change on invalid ref 1 ret -22 binder: 21879:21905 got transaction to invalid handle binder: 21879:21905 transaction failed 29201/-22, size 72-8 line 3007 binder: undelivered TRANSACTION_ERROR: 29189 binder: 21879:21914 BC_FREE_BUFFER u0000000000000000 no match 9pnet_virtio: no channels available for device H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H¨H IPv6: NLM_F_REPLACE set, but no existing node found! binder: BINDER_SET_CONTEXT_MGR already set binder: 21954:21959 ioctl 40046207 0 returned -16 binder: 21954:21959 ioctl 40046205 101 returned -22 binder: BC_ATTEMPT_ACQUIRE not supported binder: 21954:21959 ioctl c0306201 20002fd0 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 21954:21964 ioctl 40046207 0 returned -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 21954:21959 ioctl 40046207 0 returned -16 binder: 21954:21964 ioctl 40046205 101 returned -22 binder: BC_ATTEMPT_ACQUIRE not supported binder: 21954:21964 ioctl c0306201 20002fd0 returned -22 IPv6: NLM_F_REPLACE set, but no existing node found! qtaguid: iface_stat: create(lo): no inet dev qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev sock: process `syz-executor6' is using obsolete setsockopt SO_BSDCOMPAT Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable device gre0 entered promiscuous mode binder: 22224:22235 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 22224:22230 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 22224:22238 BC_DEAD_BINDER_DONE 0000000000000000 not found device gre0 entered promiscuous mode binder: 22493:22499 BC_FREE_BUFFER u0000000000000000 no match binder: 22493:22499 BC_DEAD_BINDER_DONE 0000000000000004 not found binder: 22493:22509 DecRefs 0 refcount change on invalid ref 2 ret -22 binder: 22493:22499 unknown command 0 binder: 22493:22499 ioctl c0306201 2000a000 returned -22 binder: 22516:22518 BC_DEAD_BINDER_DONE 0000000000000003 not found binder: 22516:22518 BC_INCREFS_DONE u000000002011a000 no match binder: 22516:22518 got transaction with invalid parent offset or type binder: 22516:22518 transaction failed 29201/-22, size 32-24 line 3253 binder: 22516:22518 got transaction with unaligned buffers size, 58534 binder: 22516:22518 transaction failed 29201/-22, size 0-40 line 3175 binder_alloc: binder_alloc_mmap_handler: 22516 2011a000-2051a000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 22516:22519 ioctl 40046207 0 returned -16 binder: 22493:22499 ioctl c0306201 20010000 returned -14 binder_alloc: 22516: binder_alloc_buf, no vma binder: 22516:22518 transaction failed 29189/-3, size 0-40 line 3130 binder: undelivered TRANSACTION_ERROR: 29201 binder: 22493 invalid dec weak, ref 337 desc 0 s 1 w 0 binder: 22493:22499 DecRefs 0 refcount change on invalid ref 4 ret -22 binder: 22493:22499 BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch 0000000000000003 != fffffffffffffffe binder: 22493:22499 got reply transaction with no transaction stack binder: 22493:22499 transaction failed 29201/-71, size 0-48 line 2923 binder: 22493:22499 tried to acquire reference to desc 0, got 1 instead binder: 22493:22499 BC_REQUEST_DEATH_NOTIFICATION death notification already set binder: 22493:22528 BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch 0000000000000003 != 0000000000000000 binder: 22493:22499 BC_FREE_BUFFER u0000000000000000 no match binder: 22493:22499 BC_REQUEST_DEATH_NOTIFICATION death notification already set binder: 22493:22499 BC_DEAD_BINDER_DONE 0000000000000004 not found binder: 22493:22499 ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER binder: 22493:22499 BC_CLEAR_DEATH_NOTIFICATION invalid ref 2 binder: 22493:22499 got reply transaction with no transaction stack binder: 22493:22499 transaction failed 29201/-71, size 72-40 line 2923 binder: 22493:22499 DecRefs 0 refcount change on invalid ref 2 ret -22 binder: 22493:22499 BC_REQUEST_DEATH_NOTIFICATION death notification already set binder: 22493:22509 unknown command 0 binder: 22493:22509 ioctl c0306201 20003fd0 returned -22 binder: undelivered death notification, 0000000000000000 nla_parse: 17 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=22594 comm=syz-executor5 netlink: 11 bytes leftover after parsing attributes in process `syz-executor3'. device lo entered promiscuous mode qtaguid: iface_stat: create(lo): no inet dev qtaguid: iface_stat: create6(lo): no inet dev netlink: 11 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev device lo left promiscuous mode keychord: invalid keycode count 0 keychord: invalid keycode count 0 ===================================== [ BUG: bad unlock balance detected! ] 4.9.68-gfb66dc2 #107 Not tainted ------------------------------------- syz-executor6/22726 is trying to release lock ([ 132.325952] device lo entered promiscuous mode qtaguid: iface_stat: create(lo): no inet dev qtaguid: iface_stat: create6(lo): no inet dev IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev mrt_lock) at: but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor6/22726: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0x9f/0xc0 fs/file.c:781 #1: (&p->lock){+.+.+.}, at: [] seq_read+0xdd/0x1290 fs/seq_file.c:178 stack backtrace: CPU: 1 PID: 22726 Comm: syz-executor6 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c16678e8 ffffffff81d90889 ffffffff849ae9f8 ffff8801d97bc800 ffffffff834dfc54 ffffffff849ae9f8 ffff8801d97bd088 ffff8801c1667918 ffffffff812353f4 dffffc0000000000 ffffffff849ae9f8 00000000ffffffff Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3398 [] __lock_release kernel/locking/lockdep.c:3540 [inline] [] lock_release+0x6f8/0xb80 kernel/locking/lockdep.c:3775 [] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] [] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255 [] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553 [] seq_read+0xa83/0x1290 fs/seq_file.c:283 [] proc_reg_read+0xef/0x170 fs/proc/inode.c:202 [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_readv+0xe6/0x250 fs/read_write.c:924 [] SYSC_readv fs/read_write.c:1011 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1008 [] entry_SYSCALL_64_fastpath+0x23/0xc6 IPVS: Creating netns size=2536 id=19 IPVS: Creating netns size=2536 id=20 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 22975 Comm: syz-executor3 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c3d6f480 ffffffff81d90889 ffff8801c3d6f760 0000000000000000 ffff8801cce53490 ffff8801c3d6f650 ffff8801cce53380 ffff8801c3d6f678 ffffffff8165e497 0000000000000000 ffff8801c3d6f5d0 00000001ccc57067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406 [] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012 [] do_ip_setsockopt.isra.12+0x1977/0x2960 net/ipv4/ip_sockglue.c:1151 [] ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1240 [] tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2736 [] sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2706 [] SYSC_setsockopt net/socket.c:1771 [inline] [] SyS_setsockopt+0x160/0x250 net/socket.c:1750 [] entry_SYSCALL_64_fastpath+0x23/0xc6 pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads netlink: 13 bytes leftover after parsing attributes in process `syz-executor2'. FAULT_FLAG_ALLOW_RETRY missing 30 FAULT_FLAG_ALLOW_RETRY missing 20 CPU: 0 PID: 23230 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801ca30f2d8 ffffffff81d90889 ffff8801ca30f5b8 0000000000000000 ffff8801cce52890 ffff8801ca30f4a8 ffff8801cce52780 ffff8801ca30f4d0 ffffffff8165e497 0000000000000000 ffff8801ca30f428 00000001d8735067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] faultin_page mm/gup.c:386 [inline] [] __get_user_pages+0x39a/0x1010 mm/gup.c:585 [] __get_user_pages_locked mm/gup.c:797 [inline] [] __get_user_pages_unlocked mm/gup.c:872 [inline] [] get_user_pages_unlocked+0x1d3/0x370 mm/gup.c:900 [] get_user_pages_fast+0x11e/0x320 arch/x86/mm/gup.c:440 [] get_futex_key+0x20a/0x1050 kernel/futex.c:545 [] futex_requeue+0x240/0x15c0 kernel/futex.c:1746 [] do_futex+0x48f/0x15c0 kernel/futex.c:3242 [] SYSC_futex kernel/futex.c:3280 [inline] [] SyS_futex+0x226/0x2d0 kernel/futex.c:3248 [] entry_SYSCALL_64_fastpath+0x23/0xc6 netlink: 13 bytes leftover after parsing attributes in process `syz-executor2'. audit: type=1400 audit(1513059452.562:65): avc: denied { accept } for pid=23288 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 CPU: 0 PID: 23254 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c2677930 ffffffff81d90889 ffff8801c2677c10 0000000000000000 ffff8801cce52890 ffff8801c2677b00 ffff8801cce52780 ffff8801c2677b28 ffffffff8165e497 ffff8801c2677ac8 ffff8801c2677a80 00000001d8735067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406 [] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012 [] entry_SYSCALL_64_fastpath+0x23/0xc6 FAULT_FLAG_ALLOW_RETRY missing 30 FAULT_FLAG_ALLOW_RETRY missing 20 CPU: 1 PID: 23351 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c4c0f2d8 ffffffff81d90889 ffff8801c4c0f5b8 0000000000000000 ffff8801a4408590 ffff8801c4c0f4a8 ffff8801a4408480 ffff8801c4c0f4d0 ffffffff8165e497 0000000000000000 ffff8801c4c0f428 00000001d9527067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] faultin_page mm/gup.c:386 [inline] [] __get_user_pages+0x39a/0x1010 mm/gup.c:585 [] __get_user_pages_locked mm/gup.c:797 [inline] [] __get_user_pages_unlocked mm/gup.c:872 [inline] [] get_user_pages_unlocked+0x1d3/0x370 mm/gup.c:900 [] get_user_pages_fast+0x11e/0x320 arch/x86/mm/gup.c:440 [] get_futex_key+0x20a/0x1050 kernel/futex.c:545 [] futex_requeue+0x240/0x15c0 kernel/futex.c:1746 [] do_futex+0x48f/0x15c0 kernel/futex.c:3242 [] SYSC_futex kernel/futex.c:3280 [inline] [] SyS_futex+0x226/0x2d0 kernel/futex.c:3248 [] entry_SYSCALL_64_fastpath+0x23/0xc6 CPU: 1 PID: 23362 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801ce177930 ffffffff81d90889 ffff8801ce177c10 0000000000000000 ffff8801a4408590 ffff8801ce177b00 ffff8801a4408480 ffff8801ce177b28 ffffffff8165e497 ffff8801ce177ac8 ffff8801ce177a80 00000001d9527067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406 [] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012 [] entry_SYSCALL_64_fastpath+0x23/0xc6 device syz4 entered promiscuous mode FAULT_FLAG_ALLOW_RETRY missing 30 FAULT_FLAG_ALLOW_RETRY missing 20 CPU: 0 PID: 23437 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801cc62f2d8 ffffffff81d90889 ffff8801cc62f5b8 0000000000000000 ffff8801a4408110 ffff8801cc62f4a8 ffff8801a4408000 ffff8801cc62f4d0 ffffffff8165e497 0000000000000000 ffff8801cc62f428 00000001d74b4067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] faultin_page mm/gup.c:386 [inline] [] __get_user_pages+0x39a/0x1010 mm/gup.c:585 [] __get_user_pages_locked mm/gup.c:797 [inline] [] __get_user_pages_unlocked mm/gup.c:872 [inline] [] get_user_pages_unlocked+0x1d3/0x370 mm/gup.c:900 [] get_user_pages_fast+0x11e/0x320 arch/x86/mm/gup.c:440 [] get_futex_key+0x20a/0x1050 kernel/futex.c:545 [] futex_requeue+0x240/0x15c0 kernel/futex.c:1746 [] do_futex+0x48f/0x15c0 kernel/futex.c:3242 [] SYSC_futex kernel/futex.c:3280 [inline] [] SyS_futex+0x226/0x2d0 kernel/futex.c:3248 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Buffer I/O error on dev loop0, logical block 0, lost async page write VFS: Dirty inode writeback failed for block device loop0 (err=-5). CPU: 0 PID: 23456 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c99d7930 ffffffff81d90889 ffff8801c99d7c10 0000000000000000 ffff8801a4408110 ffff8801c99d7b00 ffff8801a4408000 ffff8801c99d7b28 ffffffff8165e497 ffff8801c99d7ac8 ffff8801c99d7a80 00000001d74b4067 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323 [] do_anonymous_page mm/memory.c:2747 [inline] [] handle_pte_fault mm/memory.c:3488 [inline] [] __handle_mm_fault mm/memory.c:3577 [inline] [] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614 [] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406 [] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012 [] entry_SYSCALL_64_fastpath+0x23/0xc6 netlink: 6 bytes leftover after parsing attributes in process `syz-executor2'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPVS: Creating netns size=2536 id=21 binder: 23636:23638 got transaction with invalid parent offset or type binder: 23636:23638 transaction failed 29201/-22, size 80-16 line 3253 binder_alloc: binder_alloc_mmap_handler: 23636 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 23636:23638 ioctl 40046207 0 returned -16 binder_alloc: 23636: binder_alloc_buf, no vma binder: 23636:23642 transaction failed 29189/-3, size 80-16 line 3130 pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads binder: 23656:23658 ioctl 40046205 4 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 23656:23658 ioctl 40046207 0 returned -16 device gre0 entered promiscuous mode binder: 23656:23682 ioctl 40046205 4 returned -22 binder: undelivered death notification, 0000000000000000 binder: undelivered death notification, 0000000000000000