Warning: Permanently added '10.128.0.195' (ECDSA) to the list of known hosts. 2020/08/27 21:21:25 fuzzer started 2020/08/27 21:21:25 dialing manager at 10.128.0.105:45655 2020/08/27 21:21:25 syscalls: 3327 2020/08/27 21:21:25 code coverage: enabled 2020/08/27 21:21:25 comparison tracing: enabled 2020/08/27 21:21:25 extra coverage: enabled 2020/08/27 21:21:25 setuid sandbox: enabled 2020/08/27 21:21:25 namespace sandbox: enabled 2020/08/27 21:21:25 Android sandbox: /sys/fs/selinux/policy does not exist 2020/08/27 21:21:25 fault injection: enabled 2020/08/27 21:21:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/08/27 21:21:25 net packet injection: enabled 2020/08/27 21:21:25 net device setup: enabled 2020/08/27 21:21:25 concurrency sanitizer: enabled 2020/08/27 21:21:25 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/08/27 21:21:25 USB emulation: enabled 2020/08/27 21:21:25 hci packet injection: enabled 2020/08/27 21:21:30 suppressing KCSAN reports in functions: 'do_select' 'n_tty_receive_buf_common' 'exit_mm' 'xprt_connect' '__delete_from_page_cache' 'wbt_wait' '__blk_mq_sched_dispatch_requests' 'generic_write_end' '__mod_timer' '__mark_inode_dirty' 'futex_wait_queue_me' 'blk_mq_rq_ctx_init' '__ext4_new_inode' 'shmem_mknod' 'xas_clear_mark' '__add_to_page_cache_locked' 'do_sys_poll' 'ext4_free_inodes_count' 'lookup_fast' 'dd_has_work' 'do_nanosleep' '__io_cqring_fill_event' 'wg_packet_send_staged_packets' 'shmem_getpage_gfp' '__ext4_update_other_inode_time' 'ext4_mb_good_group' 'exit_signals' 'blk_mq_dispatch_rq_list' 'ext4_free_inode' 'tick_nohz_next_event' '__xa_clear_mark' 'do_readlinkat' 'fsnotify' 'expire_timers' 'snd_rawmidi_poll' 'ext4_mark_iloc_dirty' 'kauditd_thread' 'do_syslog' '__xa_set_mark' 'direct_page_fault' 'step_into' 'wbt_issue' 'io_sq_thread' 'find_get_pages_range_tag' 'tick_sched_timer' 'ondemand_readahead' '__delayacct_blkio_end' 'blk_mq_sched_dispatch_requests' 'alloc_pid' '__filemap_fdatawrite_range' 'ext4_writepages' '__find_get_block' 'generic_file_buffered_read' 'yama_task_free' 'wg_packet_handshake_receive_worker' 'inc_node_page_state' 'do_group_exit' 'audit_log_start' 'snd_rawmidi_kernel_write1' 'snd_rawmidi_transmit' 'xas_find_marked' 'pcpu_alloc' 21:23:11 executing program 0: bpf$MAP_CREATE(0x0, &(0x7f0000000280)={0x14, 0x4, 0x200000004, 0x400, 0x0, 0x1}, 0x2c) socket$kcm(0x29, 0x5, 0x0) r0 = socket$kcm(0x2, 0x2, 0x0) setsockopt$sock_attach_bpf(r0, 0x1, 0xf, &(0x7f0000000400), 0x8) sendmsg$kcm(r0, &(0x7f0000000a80)={0x0, 0x0, 0x0}, 0x0) bpf$MAP_CREATE(0x0, &(0x7f0000000000)={0x5}, 0xfffffffffffffdcb) bpf$MAP_CREATE(0x2, &(0x7f0000003000)={0x3, 0x0, 0x77fffb, 0x0, 0x10020000000, 0x0}, 0x2c) 21:23:11 executing program 1: openat$cgroup_ro(0xffffffffffffff9c, &(0x7f00000000c0)='memory.events\x00', 0x26e1, 0x0) r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.controllers\x00', 0x275a, 0x0) write$binfmt_script(r0, &(0x7f0000000040)=ANY=[], 0x208e24b) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x2, 0x28011, r0, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000080)='cgroup.controllers\x00', 0xb00000000065808, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000000)='memory.events\x00', 0x7a05, 0x1700) sendfile(r2, r1, 0x0, 0x100000001) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='memory.events\x00', 0x275a, 0x0) r3 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000080)='memory.events\x00', 0xb00000000065808, 0x0) preadv(r3, &(0x7f0000001300)=[{&(0x7f0000000200)=""/4096, 0x3ff800}], 0x1, 0x0, 0x0) 21:23:12 executing program 2: r0 = socket$netlink(0x10, 0x3, 0x0) r1 = socket(0x10, 0x803, 0x0) sendmsg$NBD_CMD_DISCONNECT(r1, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={0x0}}, 0x0) getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x2ba) sendmsg$nl_route(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000380)=ANY=[@ANYBLOB="3c0000001000850600"/20, @ANYRES32=r2, @ANYBLOB="fe000000000000001c0012000c000100626f6e64"], 0x3c}}, 0x0) r3 = socket$netlink(0x10, 0x3, 0x0) r4 = socket$packet(0x11, 0x3, 0x300) getsockname$packet(r4, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)) sendmsg$nl_route(r3, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)=ANY=[@ANYBLOB="28000000100025080046f99ff4c3c99b102ef800", @ANYRES32=r5, @ANYBLOB="060000000000000008000a000f"], 0x28}}, 0x0) 21:23:12 executing program 3: r0 = socket$netlink(0x10, 0x3, 0x0) r1 = socket(0x10, 0x803, 0x0) sendmsg$NBD_CMD_DISCONNECT(r1, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000180)={0x0}}, 0x0) getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14) sendmsg$nl_route(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000080)=ANY=[@ANYBLOB="4800000010000507000000000010000000000000", @ANYRES32=r2, @ANYBLOB="0000000000000000280012000900010076657468"], 0x48}}, 0x0) r3 = socket$nl_route(0x10, 0x3, 0x0) getsockname$packet(r1, &(0x7f0000000440)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14) sendmsg$nl_route(r3, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000240)=@newlink={0x20, 0x10, 0x801, 0x0, 0x0, {0x0, 0x0, 0x0, r4, 0xefffffff}}, 0x20}, 0x1, 0xc00}, 0x0) 21:23:12 executing program 4: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket$netlink(0x10, 0x3, 0x0) r2 = socket(0x10, 0x803, 0x0) sendmsg$NBD_CMD_DISCONNECT(r2, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={0x0}}, 0x0) getsockname$packet(r2, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000080)=ANY=[@ANYBLOB="480000001000050700"/20, @ANYRES32=r3, @ANYBLOB="0000000000000000280012000c00010076657468"], 0x48}}, 0x0) sendmsg$nl_route_sched(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000340)=ANY=[@ANYBLOB="740000002400070500"/20, @ANYRES32=r3, @ANYBLOB="00000000ffffffff0000000008000100716671"], 0x74}}, 0x0) sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f00000019c0)={&(0x7f00000002c0)=ANY=[@ANYBLOB="2c0000006400010700"/20, @ANYRES32=r3, @ANYBLOB="00000000000000006ac5fd3708000b00aeb25a90"], 0x2c}}, 0x0) r4 = socket(0x10, 0x3, 0x0) sendmmsg$alg(r4, &(0x7f0000000140), 0xcc, 0x0) 21:23:12 executing program 5: r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f00000001c0)='cgroup.controllers\x00', 0x275a, 0x0) write$binfmt_script(r0, &(0x7f0000000040)=ANY=[], 0x208e24b) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x2, 0x28011, r0, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000080)='cgroup.controllers\x00', 0xb00000000065808, 0x0) r2 = socket$alg(0x26, 0x5, 0x0) bind$alg(r2, &(0x7f0000000080)={0x26, 'hash\x00', 0x0, 0x0, 'blake2b-256-generic\x00'}, 0x58) r3 = accept4(r2, 0x0, 0x0, 0x0) sendfile(r3, r1, 0x0, 0x100000001) syzkaller login: [ 139.895004][ T0] ================================================================== [ 139.903219][ T0] BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick [ 139.911271][ T0] [ 139.913580][ T0] write to 0xffffffff88164010 of 4 bytes by task 0 on cpu 1: [ 139.921271][ T0] tick_nohz_stop_tick+0xa0/0x440 [ 139.926566][ T0] tick_nohz_idle_stop_tick+0xf2/0x1c0 [ 139.932201][ T0] do_idle+0x207/0x310 [ 139.936480][ T0] cpu_startup_entry+0x15/0x20 [ 139.941233][ T0] secondary_startup_64+0xa4/0xb0 [ 139.946248][ T0] [ 139.948554][ T0] read to 0xffffffff88164010 of 4 bytes by task 0 on cpu 0: [ 139.956439][ T0] tick_nohz_stop_tick+0x7a/0x440 [ 139.961685][ T0] tick_nohz_idle_stop_tick+0xf2/0x1c0 [ 139.967624][ T0] do_idle+0x207/0x310 [ 139.971665][ T0] cpu_startup_entry+0x15/0x20 [ 139.976400][ T0] rest_init+0xd8/0xe0 [ 139.980469][ T0] arch_call_rest_init+0xa/0xb [ 139.985736][ T0] start_kernel+0x608/0x6d0 [ 139.991805][ T0] secondary_startup_64+0xa4/0xb0 [ 139.996882][ T0] [ 139.999176][ T0] Reported by Kernel Concurrency Sanitizer on: [ 140.005314][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc2-syzkaller #0 [ 140.013170][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.023251][ T0] ================================================================== [ 140.031284][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 140.037844][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc2-syzkaller #0 [ 140.045711][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.055770][ T0] Call Trace: [ 140.059033][ T0] dump_stack+0x10f/0x19d [ 140.063357][ T0] panic+0x207/0x64a [ 140.067245][ T0] ? vprintk_emit+0x44a/0x4f0 [ 140.071911][ T0] kcsan_report+0x684/0x690 [ 140.076399][ T0] ? kcsan_setup_watchpoint+0x41e/0x4a0 [ 140.081925][ T0] ? tick_nohz_stop_tick+0x7a/0x440 [ 140.087142][ T0] ? tick_nohz_idle_stop_tick+0xf2/0x1c0 [ 140.092789][ T0] ? do_idle+0x207/0x310 [ 140.097014][ T0] ? cpu_startup_entry+0x15/0x20 [ 140.102100][ T0] ? rest_init+0xd8/0xe0 [ 140.106352][ T0] ? arch_call_rest_init+0xa/0xb [ 140.111282][ T0] ? start_kernel+0x608/0x6d0 [ 140.116475][ T0] ? secondary_startup_64+0xa4/0xb0 [ 140.121690][ T0] ? hrtimer_next_event_without+0x3f6/0x410 [ 140.127580][ T0] kcsan_setup_watchpoint+0x41e/0x4a0 [ 140.132956][ T0] tick_nohz_stop_tick+0x7a/0x440 [ 140.137977][ T0] tick_nohz_idle_stop_tick+0xf2/0x1c0 [ 140.143443][ T0] do_idle+0x207/0x310 [ 140.147510][ T0] cpu_startup_entry+0x15/0x20 [ 140.152268][ T0] rest_init+0xd8/0xe0 [ 140.156329][ T0] ? time_init+0xc/0xc [ 140.160393][ T0] arch_call_rest_init+0xa/0xb [ 140.165151][ T0] start_kernel+0x608/0x6d0 [ 140.170351][ T0] secondary_startup_64+0xa4/0xb0 [ 140.176523][ T0] Kernel Offset: disabled [ 140.180838][ T0] Rebooting in 86400 seconds..