netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. ====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc3+ #218 Not tainted ------------------------------------------------------ syz-executor6/17629 is trying to acquire lock: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000009b90e030>] get_online_cpus include/linux/cpu.h:117 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [<000000009b90e030>] lru_add_drain_all+0xe/0x20 mm/swap.c:729 but task is already holding lock: (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000683b2414>] inode_lock include/linux/fs.h:713 [inline] (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000683b2414>] shmem_add_seals+0x197/0x1060 mm/shmem.c:2768 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&sb->s_type->i_mutex_key#10){++++}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 down_write+0x87/0x120 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:713 [inline] generic_file_write_iter+0xdc/0x7a0 mm/filemap.c:3289 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x531/0x7f0 fs/read_write.c:653 do_iter_write+0x15a/0x540 fs/read_write.c:932 vfs_iter_write+0x77/0xb0 fs/read_write.c:945 iter_file_splice_write+0x7db/0xf30 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #5 (&pipe->mutex/1){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock+0x56/0x70 fs/pipe.c:75 iter_file_splice_write+0x264/0xf30 fs/splice.c:699 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #4 (sb_writers){.+.+}: spin_lock_irq include/linux/spinlock.h:340 [inline] clear_inode+0xa3/0x360 fs/inode.c:506 shmem_evict_inode+0x23f/0xb30 mm/shmem.c:1086 evict+0x481/0x920 fs/inode.c:553 iput_final fs/inode.c:1515 [inline] iput+0x7b9/0xaf0 fs/inode.c:1542 dentry_unlink_inode+0x4b0/0x5e0 fs/dcache.c:375 -> #3 ((completion)&req.done){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 complete_acquire include/linux/completion.h:40 [inline] __wait_for_common kernel/sched/completion.c:109 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144 devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115 device_add+0x120f/0x1640 drivers/base/core.c:1824 device_create_groups_vargs+0x1f3/0x250 drivers/base/core.c:2430 device_create_vargs drivers/base/core.c:2470 [inline] device_create+0xda/0x110 drivers/base/core.c:2506 msr_device_create+0x26/0x40 arch/x86/kernel/msr.c:188 cpuhp_invoke_callback+0x2ea/0x1d20 kernel/cpu.c:182 cpuhp_thread_fun+0x48e/0x7e0 kernel/cpu.c:571 smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441 -> #2 (cpuhp_state-up){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 cpuhp_lock_acquire kernel/cpu.c:85 [inline] cpuhp_invoke_ap_callback kernel/cpu.c:605 [inline] cpuhp_issue_call+0x1e5/0x520 kernel/cpu.c:1495 __cpuhp_setup_state_cpuslocked+0x282/0x600 kernel/cpu.c:1642 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state include/linux/cpuhotplug.h:201 [inline] page_writeback_init+0x4d/0x71 mm/page-writeback.c:2081 pagecache_init+0x48/0x4f mm/filemap.c:977 start_kernel+0x6bc/0x74f init/main.c:695 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #1 (cpuhp_state_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 __cpuhp_setup_state_cpuslocked+0x5b/0x600 kernel/cpu.c:1617 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state_nocalls include/linux/cpuhotplug.h:229 [inline] kvm_guest_init+0x1f3/0x20f arch/x86/kernel/kvm.c:528 setup_arch+0x17e8/0x1a02 arch/x86/kernel/setup.c:1266 start_kernel+0xa5/0x74f init/main.c:530 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #0 (cpu_hotplug_lock.rw_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] lru_add_drain_all+0xe/0x20 mm/swap.c:729 shmem_wait_for_pins mm/shmem.c:2672 [inline] shmem_add_seals+0x3df/0x1060 mm/shmem.c:2780 shmem_fcntl+0xfe/0x130 mm/shmem.c:2815 do_fcntl+0x73e/0x1160 fs/fcntl.c:421 SYSC_fcntl fs/fcntl.c:463 [inline] SyS_fcntl+0xdc/0x120 fs/fcntl.c:448 entry_SYSCALL_64_fastpath+0x1f/0x96 other info that might help us debug this: Chain exists of: cpu_hotplug_lock.rw_sem --> &pipe->mutex/1 --> &sb->s_type->i_mutex_key#10 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#10); lock(&pipe->mutex/1); lock(&sb->s_type->i_mutex_key#10); lock(cpu_hotplug_lock.rw_sem); *** DEADLOCK *** 1 lock held by syz-executor6/17629: #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000683b2414>] inode_lock include/linux/fs.h:713 [inline] #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000683b2414>] shmem_add_seals+0x197/0x1060 mm/shmem.c:2768 stack backtrace: CPU: 1 PID: 17629 Comm: syz-executor6 Not tainted 4.15.0-rc3+ #218 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug+0x42d/0x610 kernel/locking/lockdep.c:1271 check_prev_add+0x666/0x15f0 kernel/locking/lockdep.c:1914 check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] lru_add_drain_all+0xe/0x20 mm/swap.c:729 shmem_wait_for_pins mm/shmem.c:2672 [inline] shmem_add_seals+0x3df/0x1060 mm/shmem.c:2780 shmem_fcntl+0xfe/0x130 mm/shmem.c:2815 do_fcntl+0x73e/0x1160 fs/fcntl.c:421 SYSC_fcntl fs/fcntl.c:463 [inline] SyS_fcntl+0xdc/0x120 fs/fcntl.c:448 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f606c00ec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000048 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39 RDX: 000000000000000c RSI: 0000000000000409 RDI: 0000000000000016 RBP: 0000000000000070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006eeb20 R13: 00000000ffffffff R14: 00007f606c00f6d4 R15: 0000000000000000 device gre0 entered promiscuous mode binder: 17692:17696 DecRefs 0 refcount change on invalid ref 3 ret -22 binder: 17696 RLIMIT_NICE not set binder: 17692:17709 transaction failed 29201/-22, size 0--1 line 2890 binder: 17692:17709 DecRefs 0 refcount change on invalid ref 3 ret -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 17692:17726 ioctl 40046207 0 returned -16 binder_alloc: 17692: binder_alloc_buf, no vma binder: 17692:17734 transaction failed 29189/-3, size 0--1 line 2890 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=17823 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=17823 comm=syz-executor7 netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. ALSA: seq fatal error: cannot create timer (-19) device gre0 entered promiscuous mode ALSA: seq fatal error: cannot create timer (-19) netlink: 'syz-executor2': attribute type 10 has an invalid length. netlink: 'syz-executor2': attribute type 10 has an invalid length. TCP: request_sock_TCP: Possible SYN flooding on port 20016. Sending cookies. Check SNMP counters. nla_parse: 8 callbacks suppressed netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor3': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor3': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. ?: renamed from sit0 rfkill: input handler disabled rfkill: input handler enabled RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? device gre0 entered promiscuous mode device gre0 entered promiscuous mode kauditd_printk_skb: 377 callbacks suppressed audit: type=1326 audit(1513073317.253:1598): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=18366 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 audit: type=1326 audit(1513073317.343:1599): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=18366 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 audit: type=1400 audit(1513073317.441:1600): avc: denied { map } for pid=18415 comm="syz-executor7" path="socket:[62946]" dev="sockfs" ino=62946 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 netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. device gre0 entered promiscuous mode audit: type=1400 audit(1513073317.453:1601): avc: denied { dac_read_search } for pid=18418 comm="syz-executor3" capability=2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1513073317.477:1602): avc: denied { net_raw } for pid=18403 comm="syz-executor6" capability=13 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1513073317.484:1603): avc: denied { net_admin } for pid=18419 comm="syz-executor1" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1513073317.493:1604): avc: denied { sys_admin } for pid=18415 comm="syz-executor7" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1513073317.505:1605): avc: denied { dac_override } for pid=18419 comm="syz-executor1" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. audit: type=1400 audit(1513073318.158:1606): avc: denied { ipc_owner } for pid=18547 comm="syz-executor3" capability=15 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 netlink: 109 bytes leftover after parsing attributes in process `syz-executor2'. audit: type=1400 audit(1513073318.311:1607): avc: denied { sys_chroot } for pid=18565 comm="syz-executor5" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable device gre0 entered promiscuous mode dccp_invalid_packet: P.type (RESPONSE) not Data || [Data]Ack, while P.X == 0 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write sock: sock_set_timeout: `syz-executor3' (pid 18695) tries to set negative timeout sock: sock_set_timeout: `syz-executor3' (pid 18718) tries to set negative timeout device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl binder: 18899:18904 ioctl c0306201 20000fd0 returned -14 binder: 18899:18910 Acquire 1 refcount change on invalid ref 1 ret -22 binder: 18899:18910 BC_DEAD_BINDER_DONE 0000000000000001 not found binder: 18899:18910 got transaction with invalid offset (1, min 0 max 24) or object. binder: 18899:18910 transaction failed 29201/-22, size 24-16 line 2953 sg_write: data in/out 1562545402/1 bytes for SCSI command 0x0-- guessing data in; program syz-executor5 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=40765 sclass=netlink_route_socket pig=18926 comm=syz-executor5 binder: BINDER_SET_CONTEXT_MGR already set binder: 18899:18910 ioctl 40046207 0 returned -16 binder: 18899:18928 ioctl c0306201 20000fd0 returned -14 binder: 18899:18910 Acquire 1 refcount change on invalid ref 1 ret -22 binder: 18899:18910 BC_DEAD_BINDER_DONE 0000000000000001 not found binder_alloc: 18899: binder_alloc_buf, no vma binder: 18899:18910 transaction failed 29189/-3, size 24-16 line 2890 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=40765 sclass=netlink_route_socket pig=18912 comm=syz-executor5 sg_write: data in/out 822404280/197 bytes for SCSI command 0x12-- guessing data in; program syz-executor5 not setting count and/or reply_len properly sctp: [Deprecated]: syz-executor1 (pid 19026) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 19018) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device gre0 entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl kvm [19122]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xfffffffffffffffd lo: Invalid MTU -1075701634 requested, hw min 0 lo: Invalid MTU -1075701634 requested, hw min 0 QAT: Invalid ioctl QAT: Invalid ioctl netlink: 'syz-executor2': attribute type 29 has an invalid length. kvm [19122]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xfffffffffffffffd netlink: 'syz-executor2': attribute type 29 has an invalid length. netlink: 'syz-executor6': attribute type 4 has an invalid length. nla_parse: 9 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 'syz-executor6': attribute type 4 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'. binder: 19443:19447 ioctl c0046209 20001000 returned -22 QAT: Invalid ioctl QAT: Invalid ioctl binder: 19443:19457 ioctl c018620b 208dbfe8 returned -14 QAT: Invalid ioctl QAT: Invalid ioctl binder: 19443:19463 ioctl c018620b 208dbfe8 returned -14 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=19496 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=19496 comm={pppAsyst?msÿcõ sctp: [Deprecated]: syz-executor5 (pid 19529) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl sctp: [Deprecated]: syz-executor5 (pid 19539) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=29 sclass=netlink_tcpdiag_socket pig=19670 comm=syz-executor7