[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts. 2020/06/14 17:29:24 fuzzer started 2020/06/14 17:29:24 dialing manager at 10.128.0.105:36539 2020/06/14 17:29:24 syscalls: 3085 2020/06/14 17:29:24 code coverage: enabled 2020/06/14 17:29:24 comparison tracing: enabled 2020/06/14 17:29:24 extra coverage: enabled 2020/06/14 17:29:24 setuid sandbox: enabled 2020/06/14 17:29:24 namespace sandbox: enabled 2020/06/14 17:29:24 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/14 17:29:24 fault injection: enabled 2020/06/14 17:29:24 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/14 17:29:24 net packet injection: enabled 2020/06/14 17:29:24 net device setup: enabled 2020/06/14 17:29:24 concurrency sanitizer: enabled 2020/06/14 17:29:24 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/14 17:29:24 USB emulation: enabled syzkaller login: [ 54.645831][ T8917] KCSAN: could not find function: '_find_next_bit' 2020/06/14 17:29:30 adding functions to KCSAN blacklist: 'ep_poll' '__ext4_new_inode' 'generic_file_read_iter' 'file_update_time' 'tick_sched_do_timer' 'blk_mq_dispatch_rq_list' 'blk_mq_get_request' 'find_get_pages_range_tag' 'ext4_mb_good_group' 'generic_write_end' 'blk_mq_request_bypass_insert' 'decrypt_packet' 'lookup_fast' 'kcm_rfree' 'futex_wait_queue_me' 'tick_nohz_idle_stop_tick' 'run_timer_softirq' 'xas_clear_mark' 'mod_timer' '__send_signal' 'page_counter_charge' 'pcpu_alloc' '__filemap_fdatawrite_range' 'vm_area_dup' 'do_exit' 'ext4_mark_iloc_dirty' 'copy_process' 'do_nanosleep' 'audit_log_start' '__snd_rawmidi_transmit_ack' 'blk_mq_sched_dispatch_requests' 'n_tty_receive_buf_common' 'xas_find_marked' 'ext4_writepages' '_find_next_bit' 'kauditd_thread' '__x64_sys_ptrace' 'ext4_free_inodes_count' 'add_timer' 'ptrace_check_attach' 'do_signal_stop' 'wbt_done' 'generic_fillattr' 17:34:02 executing program 0: r0 = socket$xdp(0x2c, 0x3, 0x0) mmap$xdp(&(0x7f0000a00000/0x600000)=nil, 0x600000, 0x0, 0x52, r0, 0x0) [ 327.451818][ T8905] ================================================================== [ 327.459998][ T8905] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 327.467897][ T8905] [ 327.470239][ T8905] write to 0xffff88821b7e46f0 of 4 bytes by task 8920 on cpu 0: [ 327.478140][ T8905] propagate_one+0x3b3/0x550 [ 327.479926][ T8920] IPVS: ftp: loaded support on port[0] = 21 [ 327.482730][ T8905] propagate_mnt+0x22e/0x270 [ 327.482745][ T8905] attach_recursive_mnt+0x66d/0x8a0 [ 327.482758][ T8905] graft_tree+0x107/0x160 [ 327.482772][ T8905] do_add_mount.isra.0+0x102/0x190 [ 327.482824][ T8905] do_mount+0x12d5/0x1590 [ 327.512255][ T8905] __x64_sys_mount+0x12b/0x1a0 [ 327.517280][ T8905] do_syscall_64+0xc7/0x3b0 [ 327.521782][ T8905] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 327.527745][ T8905] [ 327.530071][ T8905] read to 0xffff88821b7e46f0 of 4 bytes by task 8905 on cpu 1: [ 327.537617][ T8905] atime_needs_update+0x13e/0x360 [ 327.542618][ T8920] chnl_net:caif_netlink_parms(): no params data found [ 327.549380][ T8905] touch_atime+0x63/0x150 [ 327.553729][ T8905] generic_file_read_iter+0x12fa/0x18c0 [ 327.559269][ T8905] ext4_file_read_iter+0x103/0x360 [ 327.564383][ T8905] new_sync_read+0x306/0x450 [ 327.568974][ T8905] __vfs_read+0x9e/0xb0 [ 327.573278][ T8920] bridge0: port 1(bridge_slave_0) entered blocking state [ 327.574698][ T8905] integrity_kernel_read+0x97/0xe0 [ 327.581932][ T8920] bridge0: port 1(bridge_slave_0) entered disabled state [ 327.586863][ T8905] ima_calc_file_hash_tfm+0x18f/0x240 [ 327.586876][ T8905] ima_calc_file_hash+0x147/0xeb0 [ 327.586888][ T8905] ima_collect_measurement+0x385/0x3b0 [ 327.586916][ T8905] process_measurement+0x91a/0x1000 [ 327.596979][ T8920] device bridge_slave_0 entered promiscuous mode [ 327.599315][ T8905] ima_file_check+0x7e/0xb0 [ 327.606551][ T8920] bridge0: port 2(bridge_slave_1) entered blocking state [ 327.610044][ T8905] path_openat+0x176e/0x23d0 [ 327.610067][ T8905] do_filp_open+0x11e/0x1b0 [ 327.616049][ T8920] bridge0: port 2(bridge_slave_1) entered disabled state [ 327.621566][ T8905] do_sys_openat2+0x52e/0x680 [ 327.621589][ T8905] do_sys_open+0xa2/0x110 [ 327.627384][ T8920] device bridge_slave_1 entered promiscuous mode [ 327.633070][ T8905] __x64_sys_openat+0x5d/0x70 [ 327.633088][ T8905] do_syscall_64+0xc7/0x3b0 [ 327.633114][ T8905] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 327.649183][ T8920] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 327.649335][ T8905] [ 327.656512][ T8920] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 327.658305][ T8905] Reported by Kernel Concurrency Sanitizer on: [ 327.676383][ T8920] team0: Port device team_slave_0 added [ 327.679811][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 327.690849][ T8920] team0: Port device team_slave_1 added [ 327.691214][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 327.691220][ T8905] ================================================================== [ 327.691235][ T8905] Kernel panic - not syncing: panic_on_warn set ... [ 327.711446][ T8920] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 327.711885][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 327.720124][ T8920] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 327.725605][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 327.725609][ T8905] Call Trace: [ 327.725633][ T8905] dump_stack+0x11d/0x187 [ 327.725661][ T8905] panic+0x210/0x640 [ 327.737344][ T8920] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 327.743739][ T8905] ? vprintk_func+0x89/0x13a [ 327.743756][ T8905] kcsan_report.cold+0xc/0x1a [ 327.743784][ T8905] kcsan_setup_watchpoint+0x3fb/0x440 [ 327.753387][ T8920] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 327.757268][ T8905] atime_needs_update+0x13e/0x360 [ 327.765568][ T8920] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 327.792616][ T8905] touch_atime+0x63/0x150 [ 327.792635][ T8905] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 327.792660][ T8905] generic_file_read_iter+0x12fa/0x18c0 [ 327.804542][ T8920] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 327.805966][ T8905] ext4_file_read_iter+0x103/0x360 [ 327.805994][ T8905] new_sync_read+0x306/0x450 [ 327.916827][ T8905] __vfs_read+0x9e/0xb0 [ 327.920976][ T8905] integrity_kernel_read+0x97/0xe0 [ 327.926067][ T8905] ima_calc_file_hash_tfm+0x18f/0x240 [ 327.931429][ T8905] ? should_fail+0x7c/0x2fd [ 327.935945][ T8905] ? widen_string+0x48/0x190 [ 327.940514][ T8905] ? string_nocheck+0xe1/0x100 [ 327.945260][ T8905] ? format_decode+0x19c/0xaa0 [ 327.950057][ T8905] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 327.955940][ T8905] ? tomoyo_profile+0x3f/0x50 [ 327.960695][ T8905] ? __rcu_read_unlock+0x77/0x390 [ 327.965728][ T8905] ? tomoyo_write_log2+0x64/0x580 [ 327.970736][ T8905] ? setuid_policy_lookup+0xdf/0x110 [ 327.976000][ T8905] ima_calc_file_hash+0x147/0xeb0 [ 327.981003][ T8905] ? up_read+0x42/0x90 [ 327.985060][ T8905] ? ext4_xattr_get+0x10b/0x600 [ 327.990337][ T8905] ima_collect_measurement+0x385/0x3b0 [ 327.995781][ T8905] process_measurement+0x91a/0x1000 [ 328.001682][ T8905] ? dquot_file_open+0x60/0x80 [ 328.006442][ T8905] ? ext4_file_open+0x109/0x440 [ 328.011276][ T8905] ? __rcu_read_unlock+0x77/0x390 [ 328.016283][ T8905] ? aa_get_task_label+0x1ee/0x370 [ 328.021375][ T8905] ima_file_check+0x7e/0xb0 [ 328.025858][ T8905] path_openat+0x176e/0x23d0 [ 328.030457][ T8905] ? ext4_journal_check_start+0xf8/0x160 [ 328.036676][ T8905] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 328.042545][ T8905] ? constant_test_bit+0xd/0x30 [ 328.047471][ T8905] ? wb_io_lists_populated+0x88/0xa0 [ 328.055925][ T8905] ? _raw_spin_unlock+0x38/0x60 [ 328.060766][ T8905] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 328.066850][ T8905] do_filp_open+0x11e/0x1b0 [ 328.071492][ T8905] ? _find_next_bit.constprop.0+0x126/0x160 [ 328.077390][ T8905] ? __read_once_size+0x2f/0xd0 [ 328.082656][ T8905] ? _raw_spin_unlock+0x38/0x60 [ 328.087482][ T8905] ? __alloc_fd+0x2f3/0x3b0 [ 328.091969][ T8905] do_sys_openat2+0x52e/0x680 [ 328.096727][ T8905] do_sys_open+0xa2/0x110 [ 328.101047][ T8905] __x64_sys_openat+0x5d/0x70 [ 328.105703][ T8905] do_syscall_64+0xc7/0x3b0 [ 328.110186][ T8905] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 328.116053][ T8905] RIP: 0033:0x4b3d4a [ 328.119928][ T8905] Code: e8 5b a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48 [ 328.139516][ T8905] RSP: 002b:000000c000603830 EFLAGS: 00000206 ORIG_RAX: 0000000000000101 [ 328.147991][ T8905] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3d4a [ 328.155939][ T8905] RDX: 0000000000080002 RSI: 000000c014f5c5e0 RDI: ffffffffffffff9c [ 328.163902][ T8905] RBP: 000000c0006038a8 R08: 0000000000000000 R09: 0000000000000000 [ 328.171848][ T8905] R10: 00000000000001a4 R11: 0000000000000206 R12: ffffffffffffffff [ 328.179807][ T8905] R13: 0000000000000030 R14: 000000000000002f R15: 0000000000000100 [ 328.189851][ T8905] Kernel Offset: disabled [ 328.194345][ T8905] Rebooting in 86400 seconds..