[  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 '10.128.1.18' (ECDSA) to the list of known hosts.
2021/01/27 19:24:49 fuzzer started
2021/01/27 19:24:50 dialing manager at 10.128.0.105:38279
2021/01/27 19:24:50 syscalls: 3466
2021/01/27 19:24:50 code coverage: enabled
2021/01/27 19:24:50 comparison tracing: enabled
2021/01/27 19:24:50 extra coverage: enabled
2021/01/27 19:24:50 setuid sandbox: enabled
2021/01/27 19:24:50 namespace sandbox: enabled
2021/01/27 19:24:50 Android sandbox: /sys/fs/selinux/policy does not exist
2021/01/27 19:24:50 fault injection: enabled
2021/01/27 19:24:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/01/27 19:24:50 net packet injection: enabled
2021/01/27 19:24:50 net device setup: enabled
2021/01/27 19:24:50 concurrency sanitizer: enabled
2021/01/27 19:24:50 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/01/27 19:24:50 USB emulation: enabled
2021/01/27 19:24:50 hci packet injection: enabled
2021/01/27 19:24:50 wifi device emulation: enabled
2021/01/27 19:24:53 suppressing KCSAN reports in functions: '__xa_clear_mark' 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'pcpu_alloc' '__add_to_page_cache_locked' 'generic_write_end' 'futex_wait_queue_me' 'alloc_pid' 'tick_sched_timer' 'bpf_lru_pop_free' 'ext4_free_inodes_count' 'complete_signal' 'audit_log_start' 'do_signal_stop' '_prb_read_valid' '__fsnotify_parent' '__send_signal' 'do_epoll_ctl' '__io_cqring_fill_event' 'xas_find_marked' 'expire_timers' 'exit_mm' 'ext4_mb_good_group' 'fifo_open' 'compaction_alloc' 'dd_has_work' 'wbt_done' 'blk_mq_sched_dispatch_requests' '__mod_timer' 'ext4_free_inode' 'kauditd_thread' 'ext4_mark_iloc_dirty' '__percpu_counter_compare' 'ext4_write_end' '__writeback_single_inode' '__ext4_new_inode' 'blk_mq_rq_ctx_init' 'ext4_mb_regular_allocator' 'xas_clear_mark' 'n_tty_receive_buf_common' 'wbt_issue' 
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2021/01/27 19:25:57 starting 6 fuzzer processes
19:25:58 executing program 0:
r0 = socket$kcm(0x2b, 0x1, 0x0)
ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200)
r1 = bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x11, 0x8, &(0x7f0000000200)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00'}, 0x48)
bpf$BPF_RAW_TRACEPOINT_OPEN(0x11, &(0x7f0000000180)={&(0x7f0000000040)='sys_exit\x00', r1}, 0x10)
bpf$MAP_DELETE_BATCH(0x1b, 0x0, 0x0)

19:25:58 executing program 1:
unshare(0x400)
r0 = socket$inet_udplite(0x2, 0x2, 0x88)
setsockopt$IP_VS_SO_SET_FLUSH(r0, 0x0, 0x485, 0x0, 0x0)

syzkaller login: [   99.176977][ T8446] ==================================================================
[   99.185119][ T8446] BUG: KCSAN: data-race in tomoyo_check_path_acl / tomoyo_merge_path_acl
[   99.193541][ T8446] 
[   99.195858][ T8446] write to 0xffff88812968e9da of 2 bytes by task 8425 on cpu 0:
[   99.203492][ T8446]  tomoyo_merge_path_acl+0x4c/0x70
[   99.208726][ T8446]  tomoyo_update_domain+0x337/0x3a0
[   99.214018][ T8446]  tomoyo_write_file+0x210/0x910
[   99.218958][ T8446]  tomoyo_supervisor+0xaad/0xb20
[   99.223892][ T8446]  tomoyo_path_perm+0x261/0x330
[   99.228744][ T8446]  tomoyo_path_truncate+0x18/0x20
[   99.233769][ T8446]  security_path_truncate+0x7f/0xd0
[   99.239017][ T8446]  do_sys_ftruncate+0x38d/0x530
[   99.243884][ T8446]  __x64_sys_ftruncate+0x2f/0x40
[   99.248839][ T8446]  do_syscall_64+0x39/0x80
[   99.253336][ T8446]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   99.259222][ T8446] 
[   99.261554][ T8446] read to 0xffff88812968e9da of 2 bytes by task 8446 on cpu 1:
[   99.269100][ T8446]  tomoyo_check_path_acl+0x1e/0xe0
[   99.274212][ T8446]  tomoyo_check_acl+0xcc/0x200
[   99.278970][ T8446]  tomoyo_execute_permission+0xa1/0x190
[   99.284511][ T8446]  tomoyo_find_next_domain+0x213/0x10a0
[   99.290047][ T8446]  tomoyo_bprm_check_security+0x96/0xd0
[   99.295587][ T8446]  security_bprm_check+0x3f/0x90
[   99.300534][ T8446]  exec_binprm+0x143/0x720
[   99.304942][ T8446]  bprm_execve+0x37e/0x4f0
[   99.309353][ T8446]  do_execveat_common+0x60c/0x6c0
[   99.314382][ T8446]  __x64_sys_execve+0x56/0x70
[   99.319059][ T8446]  do_syscall_64+0x39/0x80
[   99.323475][ T8446]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   99.329355][ T8446] 
[   99.331675][ T8446] Reported by Kernel Concurrency Sanitizer on:
[   99.337809][ T8446] CPU: 1 PID: 8446 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0
[   99.346127][ T8446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   99.356201][ T8446] ==================================================================
[   99.364242][ T8446] Kernel panic - not syncing: panic_on_warn set ...
[   99.370815][ T8446] CPU: 1 PID: 8446 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0
[   99.379138][ T8446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   99.389188][ T8446] Call Trace:
[   99.392458][ T8446]  dump_stack+0x116/0x15d
[   99.396787][ T8446]  panic+0x1e7/0x5fa
[   99.400673][ T8446]  ? vprintk_emit+0x2e2/0x360
[   99.405344][ T8446]  kcsan_report+0x67b/0x680
[   99.409842][ T8446]  ? kcsan_setup_watchpoint+0x47b/0x4e0
[   99.415379][ T8446]  ? tomoyo_check_path_acl+0x1e/0xe0
[   99.420655][ T8446]  ? tomoyo_check_acl+0xcc/0x200
[   99.425588][ T8446]  ? tomoyo_execute_permission+0xa1/0x190
[   99.431328][ T8446]  ? tomoyo_find_next_domain+0x213/0x10a0
[   99.437046][ T8446]  ? tomoyo_bprm_check_security+0x96/0xd0
[   99.442769][ T8446]  ? security_bprm_check+0x3f/0x90
[   99.447876][ T8446]  ? exec_binprm+0x143/0x720
[   99.452458][ T8446]  ? bprm_execve+0x37e/0x4f0
[   99.457046][ T8446]  ? do_execveat_common+0x60c/0x6c0
[   99.462250][ T8446]  ? __x64_sys_execve+0x56/0x70
[   99.467101][ T8446]  ? do_syscall_64+0x39/0x80
[   99.471692][ T8446]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   99.477855][ T8446]  ? irqentry_exit_cond_resched+0x30/0x40
[   99.483665][ T8446]  ? irqentry_exit+0x2a/0x40
[   99.488250][ T8446]  ? sysvec_apic_timer_interrupt+0x80/0x90
[   99.494042][ T8446]  kcsan_setup_watchpoint+0x47b/0x4e0
[   99.499414][ T8446]  ? tomoyo_path_matches_pattern+0xf9/0x120
[   99.505297][ T8446]  tomoyo_check_path_acl+0x1e/0xe0
[   99.510405][ T8446]  tomoyo_check_acl+0xcc/0x200
[   99.515161][ T8446]  ? tomoyo_execute_permission+0x190/0x190
[   99.520961][ T8446]  tomoyo_execute_permission+0xa1/0x190
[   99.526622][ T8446]  tomoyo_find_next_domain+0x213/0x10a0
[   99.532178][ T8446]  tomoyo_bprm_check_security+0x96/0xd0
[   99.537741][ T8446]  security_bprm_check+0x3f/0x90
[   99.542705][ T8446]  exec_binprm+0x143/0x720
[   99.547123][ T8446]  bprm_execve+0x37e/0x4f0
[   99.551546][ T8446]  do_execveat_common+0x60c/0x6c0
[   99.556565][ T8446]  __x64_sys_execve+0x56/0x70
[   99.561247][ T8446]  do_syscall_64+0x39/0x80
[   99.565659][ T8446]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   99.571546][ T8446] RIP: 0033:0x4b10b6
[   99.575432][ T8446] Code: 48 c7 44 24 50 00 00 00 00 e8 76 c6 f8 ff c3 cc cc cc cc cc 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 1b 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[   99.595036][ T8446] RSP: 002b:000000c000297378 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
[   99.603447][ T8446] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004b10b6
[   99.611415][ T8446] RDX: 000000c0020b1960 RSI: 000000c0036202e0 RDI: 000000c00da801e0
[   99.619387][ T8446] RBP: 000000c000297518 R08: 0000000000000012 R09: 0000000000000000
[   99.627352][ T8446] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000004a88e7
[   99.635317][ T8446] R13: 000000000000000b R14: 000000000000000a R15: 00000000000000aa
[   99.644370][ T8446] Kernel Offset: disabled
[   99.648845][ T8446] Rebooting in 86400 seconds..