[ 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 '10.128.0.88' (ECDSA) to the list of known hosts. 2020/11/04 22:34:54 fuzzer started 2020/11/04 22:34:55 dialing manager at 10.128.0.105:36273 2020/11/04 22:34:55 syscalls: 3448 2020/11/04 22:34:55 code coverage: enabled 2020/11/04 22:34:55 comparison tracing: enabled 2020/11/04 22:34:55 extra coverage: enabled 2020/11/04 22:34:55 setuid sandbox: enabled 2020/11/04 22:34:55 namespace sandbox: enabled 2020/11/04 22:34:55 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/04 22:34:55 fault injection: enabled 2020/11/04 22:34:55 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/04 22:34:55 net packet injection: enabled 2020/11/04 22:34:55 net device setup: enabled 2020/11/04 22:34:55 concurrency sanitizer: enabled 2020/11/04 22:34:55 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/04 22:34:55 USB emulation: enabled 2020/11/04 22:34:55 hci packet injection: enabled 2020/11/04 22:34:55 wifi device emulation: enabled 2020/11/04 22:35:02 suppressing KCSAN reports in functions: 'ext4_ext_try_to_merge_right' 'find_get_pages_range_tag' 'ext4_free_inode' '__delayacct_blkio_end' '__delete_from_page_cache' '__add_to_page_cache_locked' 'expire_timers' 'wbt_issue' 'xas_clear_mark' '_prb_read_valid' 'do_nanosleep' 'do_epoll_ctl' 'exit_mmap' 'n_tty_read' 'kauditd_thread' 'xas_find_marked' 'generic_file_buffered_read' 'dev_uevent' '__blkdev_put' 'ext4_handle_inode_extension' 'exit_mm' 'do_readlinkat' 'tick_nohz_next_event' 'shmem_unlink' 'ext4_writepages' '__ext4_new_inode' 'ext4_set_iomap' 'vfs_readlink' 'blk_mq_dispatch_rq_list' '__xa_clear_mark' '__dentry_kill' 'wbt_wait' 'alloc_pid' 'filemap_map_pages' 'io_sq_thread' '__ext4_update_other_inode_time' '__filemap_fdatawrite_range' 'shmem_symlink' 'audit_log_start' 'dd_has_work' 'lru_add_drain_all' 'snd_rawmidi_poll' 'ext4_mark_iloc_dirty' '__fsnotify_parent' 'tomoyo_supervisor' 'sock_alloc_send_pskb' 'exit_signals' 'drop_nlink' 'blk_mq_rq_ctx_init' 'ext4_mb_regular_allocator' 'n_tty_receive_buf_common' 'pcpu_alloc' 'shmem_add_to_page_cache' 'get_cpu_iowait_time_us' 'caching_thread' 'do_sys_poll' 'blk_mq_sched_dispatch_requests' 'ext4_free_inodes_count' 'tick_sched_timer' 'dec_zone_page_state' 'do_signal_stop' '__mark_inode_dirty' '__find_get_block' 'dput' 'do_select' 'ext4_setattr' 'do_coredump' 'block_page_mkwrite' 'generic_write_end' '__io_cqring_fill_event' 'shmem_mknod' 'file_remove_privs' 'wg_packet_send_staged_packets' 'futex_wait_queue_me' '__xa_set_mark' '__process_echoes' 'ext4_mb_good_group' 'ptrace_check_attach' 'write_cache_pages' 'io_cqring_overflow_flush' 22:37:46 executing program 0: r0 = openat$sequencer(0xffffffffffffff9c, &(0x7f0000000140)='/dev/sequencer\x00', 0x0, 0x0) ioctl$BTRFS_IOC_DEV_INFO(r0, 0xd000941e, 0x0) syzkaller login: [ 202.657057][ T8466] ================================================================== [ 202.665179][ T8466] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 202.672736][ T8466] [ 202.675318][ T8466] read-write to 0xffff888144282370 of 4 bytes by task 8486 on cpu 1: [ 202.683364][ T8466] propagate_one+0x323/0x3f0 [ 202.687941][ T8466] propagate_mnt+0x2f8/0x650 [ 202.692521][ T8466] attach_recursive_mnt+0x4fb/0x1180 [ 202.697792][ T8466] path_mount+0x1aed/0x1c10 [ 202.702304][ T8466] __se_sys_mount+0x23d/0x2e0 [ 202.706980][ T8466] __x64_sys_mount+0x63/0x70 [ 202.711548][ T8466] do_syscall_64+0x39/0x80 [ 202.715941][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 202.721801][ T8466] [ 202.724109][ T8466] read to 0xffff888144282370 of 4 bytes by task 8466 on cpu 0: [ 202.731642][ T8466] atime_needs_update+0x133/0x370 [ 202.736643][ T8466] touch_atime+0x53/0x1a0 [ 202.740960][ T8466] generic_file_buffered_read+0x1a1c/0x2110 [ 202.746826][ T8466] generic_file_read_iter+0x80/0x3d0 [ 202.752084][ T8466] ext4_file_read_iter+0x2d0/0x420 [ 202.757185][ T8466] __kernel_read+0x307/0x560 [ 202.761782][ T8466] integrity_kernel_read+0x4c/0x70 [ 202.766963][ T8466] ima_calc_file_hash+0x9c7/0x1430 [ 202.772145][ T8466] ima_collect_measurement+0x168/0x300 [ 202.777593][ T8466] process_measurement+0x9f1/0x1050 [ 202.782768][ T8466] ima_file_check+0x72/0xa0 [ 202.787250][ T8466] path_openat+0x1887/0x20a0 [ 202.791828][ T8466] do_filp_open+0xbd/0x1d0 [ 202.796225][ T8466] do_sys_openat2+0xa3/0x240 [ 202.800815][ T8466] __x64_sys_openat+0xef/0x110 [ 202.805562][ T8466] do_syscall_64+0x39/0x80 [ 202.809953][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 202.815820][ T8466] [ 202.818126][ T8466] Reported by Kernel Concurrency Sanitizer on: [ 202.824260][ T8466] CPU: 0 PID: 8466 Comm: syz-fuzzer Not tainted 5.10.0-rc2-syzkaller #0 [ 202.832555][ T8466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 202.842585][ T8466] ================================================================== [ 202.850634][ T8466] Kernel panic - not syncing: panic_on_warn set ... [ 202.857208][ T8466] CPU: 0 PID: 8466 Comm: syz-fuzzer Not tainted 5.10.0-rc2-syzkaller #0 [ 202.865513][ T8466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 202.875540][ T8466] Call Trace: [ 202.878808][ T8466] dump_stack+0x116/0x15d [ 202.883113][ T8466] panic+0x1e7/0x5fa [ 202.886995][ T8466] ? vprintk_emit+0x2f2/0x370 [ 202.891665][ T8466] kcsan_report+0x67b/0x680 [ 202.896159][ T8466] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 202.901676][ T8466] ? atime_needs_update+0x133/0x370 [ 202.906846][ T8466] ? touch_atime+0x53/0x1a0 [ 202.911323][ T8466] ? generic_file_buffered_read+0x1a1c/0x2110 [ 202.917384][ T8466] ? generic_file_read_iter+0x80/0x3d0 [ 202.922832][ T8466] ? ext4_file_read_iter+0x2d0/0x420 [ 202.928154][ T8466] ? __kernel_read+0x307/0x560 [ 202.932898][ T8466] ? integrity_kernel_read+0x4c/0x70 [ 202.938288][ T8466] ? ima_calc_file_hash+0x9c7/0x1430 [ 202.943559][ T8466] ? ima_collect_measurement+0x168/0x300 [ 202.949180][ T8466] ? process_measurement+0x9f1/0x1050 [ 202.954548][ T8466] ? ima_file_check+0x72/0xa0 [ 202.959197][ T8466] ? path_openat+0x1887/0x20a0 [ 202.963936][ T8466] ? do_filp_open+0xbd/0x1d0 [ 202.968501][ T8466] ? do_sys_openat2+0xa3/0x240 [ 202.973261][ T8466] ? __x64_sys_openat+0xef/0x110 [ 202.978204][ T8466] ? do_syscall_64+0x39/0x80 [ 202.982795][ T8466] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 202.988841][ T8466] ? prandom_u32_state+0x9/0x80 [ 202.994712][ T8466] kcsan_setup_watchpoint+0x46a/0x4d0 [ 203.000058][ T8466] ? __check_object_size+0x253/0x310 [ 203.005318][ T8466] atime_needs_update+0x133/0x370 [ 203.010329][ T8466] touch_atime+0x53/0x1a0 [ 203.014635][ T8466] ? mark_page_accessed+0x529/0x5e0 [ 203.019807][ T8466] ? generic_file_buffered_read+0x14b5/0x2110 [ 203.025874][ T8466] generic_file_buffered_read+0x1a1c/0x2110 [ 203.031761][ T8466] generic_file_read_iter+0x80/0x3d0 [ 203.037070][ T8466] ext4_file_read_iter+0x2d0/0x420 [ 203.042157][ T8466] __kernel_read+0x307/0x560 [ 203.046743][ T8466] integrity_kernel_read+0x4c/0x70 [ 203.051832][ T8466] ima_calc_file_hash+0x9c7/0x1430 [ 203.056920][ T8466] ? __switch_to+0x14e/0x4c0 [ 203.061507][ T8466] ? __schedule+0x39b/0x550 [ 203.065994][ T8466] ? widen_string+0x3a/0x280 [ 203.070557][ T8466] ? format_decode+0x1d3/0x840 [ 203.075294][ T8466] ? string+0x1f9/0x210 [ 203.079422][ T8466] ? __rcu_read_unlock+0x3a/0x220 [ 203.084422][ T8466] ? ext4_xattr_ibody_get+0x68/0x630 [ 203.089680][ T8466] ? aa_get_newest_label+0x74/0x250 [ 203.094853][ T8466] ? apparmor_capable+0xfe/0x160 [ 203.099762][ T8466] ? __rcu_read_unlock+0x3a/0x220 [ 203.104760][ T8466] ? ext4_xattr_get+0x27d/0x580 [ 203.109583][ T8466] ? ima_match_policy+0xa54/0xa90 [ 203.114597][ T8466] ima_collect_measurement+0x168/0x300 [ 203.120030][ T8466] process_measurement+0x9f1/0x1050 [ 203.125202][ T8466] ? dquot_file_open+0x68/0x80 [ 203.129954][ T8466] ? ext4_file_open+0x18e/0x3b0 [ 203.134776][ T8466] ? __rcu_read_unlock+0x51/0x220 [ 203.139773][ T8466] ? fsnotify_perm+0x296/0x2d0 [ 203.144526][ T8466] ? aa_get_task_label+0x72/0xc0 [ 203.149452][ T8466] ? apparmor_task_getsecid+0x81/0xa0 [ 203.154957][ T8466] ima_file_check+0x72/0xa0 [ 203.159440][ T8466] path_openat+0x1887/0x20a0 [ 203.164007][ T8466] do_filp_open+0xbd/0x1d0 [ 203.168455][ T8466] ? _raw_spin_unlock+0x22/0x40 [ 203.173289][ T8466] ? __alloc_fd+0x33c/0x390 [ 203.177771][ T8466] do_sys_openat2+0xa3/0x240 [ 203.182341][ T8466] ? mem_cgroup_handle_over_high+0x34/0x3a0 [ 203.188224][ T8466] __x64_sys_openat+0xef/0x110 [ 203.192978][ T8466] do_syscall_64+0x39/0x80 [ 203.197379][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 203.203257][ T8466] RIP: 0033:0x4b3d4a [ 203.207157][ T8466] 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 [ 203.226748][ T8466] RSP: 002b:000000c0283f7808 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 203.235133][ T8466] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3d4a [ 203.243078][ T8466] RDX: 0000000000080002 RSI: 000000c028d7e440 RDI: ffffffffffffff9c [ 203.251022][ T8466] RBP: 000000c0283f7880 R08: 0000000000000000 R09: 0000000000000000 [ 203.258967][ T8466] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 203.266913][ T8466] R13: 0000000000000023 R14: 0000000000000022 R15: 0000000000000100 [ 203.275787][ T8466] Kernel Offset: disabled [ 203.280139][ T8466] Rebooting in 86400 seconds..