====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc2+ #214 Not tainted ------------------------------------------------------ syz-executor4/4923 is trying to acquire lock: (cpu_hotplug_lock.rw_sem){++++}, at: [<00000000a02f4e45>] get_online_cpus include/linux/cpu.h:117 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [<00000000a02f4e45>] lru_add_drain_all+0xe/0x20 mm/swap.c:729 but task is already holding lock: (&sb->s_type->i_mutex_key#10){++++}, at: [<000000005da02c44>] inode_lock include/linux/fs.h:713 [inline] (&sb->s_type->i_mutex_key#10){++++}, at: [<000000005da02c44>] 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){.+.+}: sb_start_write include/linux/fs.h:1542 [inline] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 filename_create+0x12b/0x520 fs/namei.c:3620 kern_path_create+0x33/0x40 fs/namei.c:3666 handle_create+0xc0/0x760 drivers/base/devtmpfs.c:203 handle drivers/base/devtmpfs.c:373 [inline] devtmpfsd+0x3b4/0x4b0 drivers/base/devtmpfs.c:399 -> #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:690 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-executor4/4923: #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<000000005da02c44>] inode_lock include/linux/fs.h:713 [inline] #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<000000005da02c44>] shmem_add_seals+0x197/0x1060 mm/shmem.c:2768 stack backtrace: CPU: 0 PID: 4923 Comm: syz-executor4 Not tainted 4.15.0-rc2+ #214 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:00007f0530f80c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000048 RAX: ffffffffffffffda RBX: 00007f0530f81700 RCX: 0000000000452a39 RDX: 000000000000000a RSI: 0000000000000409 RDI: 0000000000000014 RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007f0530f819c0 R15: 0000000000000018 netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1401 audit(1512833585.210:5302): op=fscreate invalid_context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netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'. device gre0 entered promiscuous mode netlink: 'syz-executor2': attribute type 1 has an invalid length. device eql entered promiscuous mode device eql left promiscuous mode Bearer <> rejected, illegal name netlink: 'syz-executor2': attribute type 1 has an invalid length. Bearer <> rejected, illegal name device eql entered promiscuous mode device eql left promiscuous mode rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled device gre0 entered promiscuous mode rfkill: input handler enabled netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. rfkill: input handler disabled sctp: [Deprecated]: syz-executor4 (pid 5424) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor4 (pid 5424) Use of int in maxseg socket option. Use struct sctp_assoc_value instead binder: 5445:5447 BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch 0000000000000000 != 0000008000000001 rfkill: input handler enabled binder: 5445:5451 BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch 0000000000000000 != 0000008000000001 kvm [5432]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008f data 0x47 sctp: [Deprecated]: syz-executor4 (pid 5439) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 15 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor4 (pid 5439) Use of int in maxseg socket option. Use struct sctp_assoc_value instead xprt_adjust_timeout: rq_timeout = 0! netlink: 15 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler disabled xprt_adjust_timeout: rq_timeout = 0! SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=5478 comm=!7eth0 rfkill: input handler enabled rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=5512 comm= netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. kvm [5432]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008f data 0x47 rfkill: input handler enabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. device gre0 entered promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler disabled binder_alloc: binder_alloc_mmap_handler: 5597 20000000-20002000 already mapped failed -16 binder: 5597:5599 ERROR: BC_REGISTER_LOOPER called without request binder: 5597:5599 BC_FREE_BUFFER u0000000000000000 no match binder: 5597:5599 ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER binder: 5599 RLIMIT_NICE not set rfkill: input handler enabled binder_alloc: binder_alloc_mmap_handler: 5597 20f6c000-20f70000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 5597:5619 ioctl 40046207 0 returned -16 binder_alloc: 5597: binder_alloc_buf, no vma binder: 5597:5619 ERROR: BC_REGISTER_LOOPER called without request binder: 5597:5619 BC_FREE_BUFFER u0000000000000000 no match binder: 5597:5619 ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER binder: 5619 RLIMIT_NICE not set binder: 5597:5599 transaction failed 29189/-3, size 0-0 line 2890 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE rfkill: input handler disabled dccp_v4_rcv: dropped packet with invalid checksum rfkill: input handler enabled dccp_v4_rcv: dropped packet with invalid checksum kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008f data 0x47 kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008e data 0x47 kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008d data 0x47 rfkill: input handler disabled kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008f data 0x47 kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008e data 0x47 kvm [5670]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008d data 0x47 rfkill: input handler enabled binder: 5787:5788 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5787:5788 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 5787:5788 BC_INCREFS_DONE u0000000000000000 no match binder: 5787:5788 ERROR: BC_REGISTER_LOOPER called without request binder: 5787:5788 BC_INCREFS_DONE u0000000000000000 node 270 cookie mismatch 0000000000000002 != 0000000000000000 binder: 5787:5788 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 5787:5793 BC_INCREFS_DONE u0000000000000000 node 270 cookie mismatch 0000000000000003 != 0000000000000000 binder: 5787:5788 DecRefs 0 refcount change on invalid ref 4 ret -22 binder: 5787:5788 got transaction to invalid handle binder: 5787:5788 transaction failed 29201/-22, size 40-8 line 2775 binder: 5787:5788 transaction failed 29201/-28, size 0-26302952888430444 line 2890 binder: 5787:5788 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5787:5788 BC_INCREFS_DONE u0000000000000000 no match binder: BINDER_SET_CONTEXT_MGR already set binder: 5787:5812 ioctl 40046207 0 returned -16 binder: 5787:5793 unknown command 0 binder: 5787:5812 unknown command 0 binder: 5787:5812 ioctl c0306201 2000efd0 returned -22 binder: 5787:5812 BC_INCREFS_DONE u0000000000000000 no match binder: 5787:5812 got transaction to invalid handle binder: 5787:5812 transaction failed 29201/-22, size 40-16 line 2775 binder_alloc: 5787: binder_alloc_buf, no vma binder: 5787:5812 transaction failed 29189/-3, size 0-26302952888430444 line 2890 device gre0 entered promiscuous mode rfkill: input handler disabled rfkill: input handler enabled audit: type=1326 audit(1512833588.123:5303): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5851 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 binder: 5787:5793 ioctl c0306201 20003000 returned -22 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: 5868:5870 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5868:5870 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 5868:5870 BC_INCREFS_DONE u0000000000000000 no match binder: 5868:5870 ERROR: BC_REGISTER_LOOPER called without request binder: 5868:5870 BC_INCREFS_DONE u0000000000000000 node 277 cookie mismatch 0000000000000002 != 0000000000000000 binder: 5868:5890 BC_INCREFS_DONE u0000000000000000 node 277 cookie mismatch 0000000000000003 != 0000000000000000 binder: 5868:5890 got transaction to invalid handle binder: 5868:5890 transaction failed 29201/-22, size 40-16 line 2775 audit: type=1326 audit(1512833588.263:5304): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5851 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 binder: 5868:5890 transaction failed 29201/-28, size 0-26302952888430444 line 2890 rfkill: input handler disabled binder: 5868:5890 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5868:5890 BC_INCREFS_DONE u0000000000000000 no match binder: BINDER_SET_CONTEXT_MGR already set binder: 5868:5899 ioctl 40046207 0 returned -16 binder: 5868:5899 unknown command 0 binder: 5868:5899 ioctl c0306201 2000efd0 returned -22 binder: 5868:5899 BC_INCREFS_DONE u0000000000000000 no match binder: 5868:5899 got transaction to invalid handle binder: 5868:5899 transaction failed 29201/-22, size 40-16 line 2775 binder_alloc: 5868: binder_alloc_buf, no vma binder: 5868:5899 transaction failed 29189/-3, size 0-26302952888430444 line 2890 rfkill: input handler enabled binder: 5868:5870 unknown command 0 binder: 5868:5870 ioctl c0306201 2000efd0 returned -22 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 rfkill: input handler disabled binder: 5950:5952 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5950:5952 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 5950:5952 BC_INCREFS_DONE u0000000000000000 no match binder: 5950:5952 ERROR: BC_REGISTER_LOOPER called without request binder: 5950:5952 BC_INCREFS_DONE u0000000000000000 node 283 cookie mismatch 0000000000000002 != 0000000000000000 binder: 5950:5952 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 5950:5952 DecRefs 0 refcount change on invalid ref 4 ret -22 binder: 5950:5952 got transaction to invalid handle binder: 5950:5952 transaction failed 29201/-22, size 40-8 line 2775 binder: 5950:5952 BC_INCREFS_DONE u0000000000000000 node 283 cookie mismatch 0000000000000003 != 0000000000000000 binder: 5950:5952 got transaction to invalid handle binder: 5950:5952 transaction failed 29201/-22, size 40-16 line 2775 binder: 5950:5952 transaction failed 29201/-28, size 0-26302952888430444 line 2890 binder: 5950:5952 DecRefs 0 refcount change on invalid ref 268435456 ret -22 binder: 5950:5952 BC_INCREFS_DONE u0000000000000000 no match binder: BINDER_SET_CONTEXT_MGR already set binder: 5950:5955 ioctl 40046207 0 returned -16 binder: 5950:5955 unknown command 0 binder: 5950:5955 ioctl c0306201 2000efd0 returned -22 binder: 5950:5955 BC_INCREFS_DONE u0000000000000000 no match binder: 5950:5955 got transaction to invalid handle binder: 5950:5955 transaction failed 29201/-22, size 40-16 line 2775 binder_alloc: 5950: binder_alloc_buf, no vma binder: 5950:5955 transaction failed 29189/-3, size 0-26302952888430444 line 2890 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled audit: type=1326 audit(1512833589.087:5305): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6039 comm="syz-executor2" exe="/root/syz-executor2" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 rfkill: input handler disabled audit: type=1326 audit(1512833589.209:5306): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6039 comm="syz-executor2" exe="/root/syz-executor2" sig=9 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0 rfkill: input handler enabled rfkill: input handler disabled SELinux: unrecognized netlink message: protocol=0 nlmsg_type=27 sclass=netlink_route_socket pig=6172 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=27 sclass=netlink_route_socket pig=6172 comm=syz-executor7 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled device gre0 entered promiscuous mode rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 6466 Comm: syz-executor7 Not tainted 4.15.0-rc2+ #214 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3292 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3635 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1144 [inline] netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1836 sock_sendmsg_nosec net/socket.c:636 [inline] sock_sendmsg+0xca/0x110 net/socket.c:646 sock_write_iter+0x320/0x5e0 net/socket.c:915 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f37b9a54c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f37b9a54aa0 RCX: 0000000000452a39 RDX: 0000000000000024 RSI: 0000000020458fdc RDI: 0000000000000013 RBP: 00007f37b9a54a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007f37b9a54bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 6489 Comm: syz-executor7 Not tainted 4.15.0-rc2+ #214 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3292 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3654 __do_kmalloc_node mm/slab.c:3674 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3689 __kmalloc_reserve.isra.41+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1144 [inline] netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1836 sock_sendmsg_nosec net/socket.c:636 [inline] sock_sendmsg+0xca/0x110 net/socket.c:646 sock_write_iter+0x320/0x5e0 net/socket.c:915 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f37b9a54c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452a39 RDX: 0000000000000024 RSI: 0000000020458fdc RDI: 0000000000000013 RBP: 000000000000061c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7340 R13: 0000000000000014 R14: 0000000000758138 R15: ffffffffffffffff rfkill: input handler enabled rfkill: input handler disabled FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 6532 Comm: syz-executor7 Not tainted 4.15.0-rc2+ #214 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3292 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3635 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] netlink_dump+0x53f/0xce0 net/netlink/af_netlink.c:2167 __netlink_dump_start+0x4f0/0x6d0 net/netlink/af_netlink.c:2283 genl_family_rcv_msg+0xd27/0xfc0 net/netlink/genetlink.c:548 genl_rcv_msg+0xb2/0x140 net/netlink/genetlink.c:624 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2405 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1272 [inline] netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1298 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1861 sock_sendmsg_nosec net/socket.c:636 [inline] sock_sendmsg+0xca/0x110 net/socket.c:646 sock_write_iter+0x320/0x5e0 net/socket.c:915 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f37b9a54c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f37b9a54aa0 RCX: 0000000000452a39 RDX: 0000000000000024 RSI: 0000000020458fdc RDI: 0000000000000013 RBP: 00007f37b9a54a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007f37b9a54bc8 R14: 00000000004b75fb R15: 0000000000000000 nla_parse: 59 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled rfkill: input handler disabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled device lo entered promiscuous mode rfkill: input handler enabled rfkill: input handler disabled binder_alloc: 7223: binder_alloc_buf, no vma binder: 7223:7227 transaction failed 29189/-3, size 0-0 line 2890 binder: 7223:7247 ioctl 40046205 6 returned -22 rfkill: input handler enabled binder: BINDER_SET_CONTEXT_MGR already set binder: 7223:7227 ioctl 40046207 0 returned -16 binder_alloc: 7223: binder_alloc_buf, no vma binder: 7223:7247 transaction failed 29189/-3, size 0-0 line 2890 rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled FAULT_FLAG_ALLOW_RETRY missing 30 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 7416 Comm: syz-executor5 Not tainted 4.15.0-rc2+ #214 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 handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427 do_anonymous_page mm/memory.c:3121 [inline] handle_pte_fault mm/memory.c:3934 [inline] __handle_mm_fault+0x353a/0x3e20 mm/memory.c:4060 handle_mm_fault+0x334/0x8d0 mm/memory.c:4097 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094 RIP: 0010:__get_user_4+0x1b/0x30 arch/x86/lib/getuser.S:70 RSP: 0018:ffff8801d3e37ca8 EFLAGS: 00010283 RAX: 0000000020012ffb RBX: ffff8801d3e37de0 RCX: ffffffff8199d458 RDX: ffff8801d41ce000 RSI: ffffc90002117000 RDI: 0000000000000282 RBP: ffff8801d3e37d78 R08: ffff8801d46c1998 R09: 1ffff1003a7c6f6a R10: ffff8801d41ce000 R11: 0000000000000000 R12: 1ffff1003a7c6f96 R13: 0000000020012ff8 R14: 00007f14102f86d4 R15: 0000000000000010