[ 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 '10.128.0.155' (ECDSA) to the list of known hosts. 2020/11/17 17:59:47 fuzzer started 2020/11/17 17:59:47 dialing manager at 10.128.0.105:39141 2020/11/17 17:59:52 syscalls: 3448 2020/11/17 17:59:52 code coverage: enabled 2020/11/17 17:59:52 comparison tracing: enabled 2020/11/17 17:59:52 extra coverage: enabled 2020/11/17 17:59:52 setuid sandbox: enabled 2020/11/17 17:59:52 namespace sandbox: enabled 2020/11/17 17:59:52 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/17 17:59:52 fault injection: enabled 2020/11/17 17:59:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/17 17:59:52 net packet injection: enabled 2020/11/17 17:59:52 net device setup: enabled 2020/11/17 17:59:52 concurrency sanitizer: enabled 2020/11/17 17:59:52 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/17 17:59:52 USB emulation: enabled 2020/11/17 17:59:52 hci packet injection: enabled 2020/11/17 17:59:52 wifi device emulation: enabled 2020/11/17 17:59:58 suppressing KCSAN reports in functions: 'tick_sched_timer' 'expire_timers' '__delete_from_page_cache' 'dev_uevent' 'ext4_mb_regular_allocator' 'ext4_mark_iloc_dirty' 'do_sys_poll' 'kauditd_thread' 'ext4_writepages' 'find_get_pages_range_tag' 'xas_find_marked' 'filemap_map_pages' 'pcpu_alloc' 'ext4_mb_good_group' '__ext4_new_inode' 'generic_write_end' 'do_settimeofday64' 'do_nanosleep' '__io_cqring_fill_event' 'ext4_da_write_end' 'lru_add_drain_all' '__xa_clear_mark' 'snd_rawmidi_kernel_write1' 'blk_mq_sched_dispatch_requests' 'shmem_mknod' 'blk_mq_dispatch_rq_list' 'tick_nohz_next_event' '__ext4_update_other_inode_time' '__process_echoes' 'shmem_unlink' 'ext4_setattr' '__mod_timer' 'inotify_one_event' 'audit_log_start' 'io_sq_thread' 'device_del' 'exit_mm' 'ext4_handle_inode_extension' '__delayacct_blkio_end' 'xas_clear_mark' 'kcm_rfree' '_prb_read_valid' '__ptrace_unlink' 'ext4_free_inode' 'futex_wait_queue_me' 'wbt_issue' 'snd_rawmidi_poll' 'alloc_pid' 'blk_mq_rq_ctx_init' 'blk_mq_request_bypass_insert' 'exit_signals' 'dd_has_work' 'do_select' '__add_to_page_cache_locked' 'n_tty_receive_buf_common' 'snd_rawmidi_transmit' 'fprop_new_period' '__mark_inode_dirty' 'do_signal_stop' '__find_get_block' 'ext4_free_inodes_count' 18:01:35 executing program 0: bpf$MAP_CREATE(0x0, &(0x7f0000001e00)={0x11, 0x0, 0x0, 0x9}, 0x40) syzkaller login: [ 136.933106][ T8440] ================================================================== [ 136.941220][ T8440] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 136.948660][ T8440] [ 136.950965][ T8440] read-write to 0xffff888100bcd070 of 4 bytes by task 8456 on cpu 0: [ 136.959011][ T8440] propagate_one+0x323/0x3f0 [ 136.963577][ T8440] propagate_mnt+0x2f8/0x650 [ 136.968141][ T8440] attach_recursive_mnt+0x4fb/0x1180 [ 136.973536][ T8440] path_mount+0x1aed/0x1c10 [ 136.978017][ T8440] __se_sys_mount+0x23d/0x2e0 [ 136.982667][ T8440] __x64_sys_mount+0x63/0x70 [ 136.987235][ T8440] do_syscall_64+0x39/0x80 [ 136.991627][ T8440] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 136.997508][ T8440] [ 136.999813][ T8440] read to 0xffff888100bcd070 of 4 bytes by task 8440 on cpu 1: [ 137.007344][ T8440] atime_needs_update+0x1b7/0x370 [ 137.012341][ T8440] touch_atime+0x55/0x2d0 [ 137.016645][ T8440] generic_file_buffered_read+0x1a1c/0x2110 [ 137.022509][ T8440] generic_file_read_iter+0x80/0x3d0 [ 137.027784][ T8440] ext4_file_read_iter+0x2d0/0x420 [ 137.032869][ T8440] __kernel_read+0x307/0x560 [ 137.037432][ T8440] integrity_kernel_read+0x4c/0x70 [ 137.042523][ T8440] ima_calc_file_hash+0x9c7/0x1430 [ 137.047673][ T8440] ima_collect_measurement+0x168/0x300 [ 137.053117][ T8440] process_measurement+0x9f1/0x1050 [ 137.058294][ T8440] ima_file_check+0x72/0xa0 [ 137.062773][ T8440] path_openat+0x1887/0x20a0 [ 137.067335][ T8440] do_filp_open+0xbd/0x1d0 [ 137.071742][ T8440] do_sys_openat2+0xa3/0x240 [ 137.076307][ T8440] __x64_sys_openat+0xef/0x110 [ 137.081046][ T8440] do_syscall_64+0x39/0x80 [ 137.085440][ T8440] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 137.091300][ T8440] [ 137.093603][ T8440] Reported by Kernel Concurrency Sanitizer on: [ 137.100017][ T8440] CPU: 1 PID: 8440 Comm: syz-fuzzer Not tainted 5.10.0-rc4-syzkaller #0 [ 137.108523][ T8440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.118555][ T8440] ================================================================== [ 137.126593][ T8440] Kernel panic - not syncing: panic_on_warn set ... [ 137.133154][ T8440] CPU: 1 PID: 8440 Comm: syz-fuzzer Not tainted 5.10.0-rc4-syzkaller #0 [ 137.141543][ T8440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.151570][ T8440] Call Trace: [ 137.154838][ T8440] dump_stack+0x116/0x15d [ 137.159140][ T8440] panic+0x1e7/0x5fa [ 137.163022][ T8440] ? vprintk_emit+0x2f2/0x370 [ 137.167670][ T8440] kcsan_report+0x67b/0x680 [ 137.172149][ T8440] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 137.177676][ T8440] ? atime_needs_update+0x1b7/0x370 [ 137.182863][ T8440] ? touch_atime+0x55/0x2d0 [ 137.187342][ T8440] ? generic_file_buffered_read+0x1a1c/0x2110 [ 137.193384][ T8440] ? generic_file_read_iter+0x80/0x3d0 [ 137.198817][ T8440] ? ext4_file_read_iter+0x2d0/0x420 [ 137.204088][ T8440] ? __kernel_read+0x307/0x560 [ 137.208843][ T8440] ? integrity_kernel_read+0x4c/0x70 [ 137.214099][ T8440] ? ima_calc_file_hash+0x9c7/0x1430 [ 137.219358][ T8440] ? ima_collect_measurement+0x168/0x300 [ 137.224964][ T8440] ? process_measurement+0x9f1/0x1050 [ 137.230311][ T8440] ? ima_file_check+0x72/0xa0 [ 137.234975][ T8440] ? path_openat+0x1887/0x20a0 [ 137.239726][ T8440] ? do_filp_open+0xbd/0x1d0 [ 137.244289][ T8440] ? do_sys_openat2+0xa3/0x240 [ 137.249749][ T8440] ? __x64_sys_openat+0xef/0x110 [ 137.254659][ T8440] ? do_syscall_64+0x39/0x80 [ 137.259236][ T8440] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 137.265280][ T8440] ? page_cache_ra_unbounded+0x484/0x4c0 [ 137.270885][ T8440] kcsan_setup_watchpoint+0x46a/0x4d0 [ 137.276231][ T8440] atime_needs_update+0x1b7/0x370 [ 137.281230][ T8440] touch_atime+0x55/0x2d0 [ 137.285531][ T8440] ? mark_page_accessed+0x529/0x5e0 [ 137.290718][ T8440] generic_file_buffered_read+0x1a1c/0x2110 [ 137.296585][ T8440] generic_file_read_iter+0x80/0x3d0 [ 137.301845][ T8440] ext4_file_read_iter+0x2d0/0x420 [ 137.306929][ T8440] __kernel_read+0x307/0x560 [ 137.311495][ T8440] integrity_kernel_read+0x4c/0x70 [ 137.316581][ T8440] ima_calc_file_hash+0x9c7/0x1430 [ 137.321666][ T8440] ? __should_failslab+0x81/0x90 [ 137.326597][ T8440] ? integrity_audit_message+0x7b/0x280 [ 137.332129][ T8440] ? should_failslab+0x5/0x20 [ 137.336779][ T8440] ? slab_pre_alloc_hook+0x20/0xb0 [ 137.341862][ T8440] ? widen_string+0x3a/0x280 [ 137.346425][ T8440] ? format_decode+0x1d3/0x840 [ 137.351160][ T8440] ? string+0x1f9/0x210 [ 137.355287][ T8440] ? __rcu_read_unlock+0x3a/0x220 [ 137.360288][ T8440] ? ext4_xattr_ibody_get+0x68/0x630 [ 137.365547][ T8440] ? aa_get_newest_label+0x74/0x250 [ 137.370722][ T8440] ? apparmor_capable+0xfe/0x160 [ 137.375642][ T8440] ? __rcu_read_unlock+0x3a/0x220 [ 137.380644][ T8440] ? ext4_xattr_get+0x27d/0x580 [ 137.385468][ T8440] ? ima_match_policy+0xa54/0xa90 [ 137.390466][ T8440] ima_collect_measurement+0x168/0x300 [ 137.397145][ T8440] process_measurement+0x9f1/0x1050 [ 137.402444][ T8440] ? dquot_file_open+0x68/0x80 [ 137.407183][ T8440] ? ext4_file_open+0x186/0x4f0 [ 137.412010][ T8440] ? aa_get_newest_label+0x74/0x250 [ 137.417181][ T8440] ? __rcu_read_unlock+0x51/0x220 [ 137.422197][ T8440] ? fsnotify_perm+0x296/0x2d0 [ 137.426939][ T8440] ? aa_get_task_label+0x72/0xc0 [ 137.431854][ T8440] ? apparmor_task_getsecid+0x81/0xa0 [ 137.437205][ T8440] ima_file_check+0x72/0xa0 [ 137.441686][ T8440] path_openat+0x1887/0x20a0 [ 137.446286][ T8440] ? __ext4_mark_inode_dirty+0x46a/0x610 [ 137.451908][ T8440] do_filp_open+0xbd/0x1d0 [ 137.456327][ T8440] ? _raw_spin_unlock+0x22/0x40 [ 137.461168][ T8440] ? __alloc_fd+0x33c/0x390 [ 137.465662][ T8440] do_sys_openat2+0xa3/0x240 [ 137.470246][ T8440] ? mem_cgroup_handle_over_high+0x34/0x4d0 [ 137.476114][ T8440] __x64_sys_openat+0xef/0x110 [ 137.480957][ T8440] do_syscall_64+0x39/0x80 [ 137.485368][ T8440] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 137.491499][ T8440] RIP: 0033:0x4b3d4a [ 137.495394][ T8440] 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 [ 137.515075][ T8440] RSP: 002b:000000c0273a1808 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 137.523486][ T8440] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3d4a [ 137.531434][ T8440] RDX: 0000000000080002 RSI: 000000c024f58400 RDI: ffffffffffffff9c [ 137.539380][ T8440] RBP: 000000c0273a1880 R08: 0000000000000000 R09: 0000000000000000 [ 137.547326][ T8440] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 137.555272][ T8440] R13: 0000000000000021 R14: 0000000000000020 R15: 0000000000000100 [ 137.564043][ T8440] Kernel Offset: disabled [ 137.568371][ T8440] Rebooting in 86400 seconds..