[ 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 '10.128.0.185' (ECDSA) to the list of known hosts. 2021/02/23 02:50:27 fuzzer started 2021/02/23 02:50:28 dialing manager at 10.128.0.163:43025 2021/02/23 02:50:28 syscalls: 3541 2021/02/23 02:50:28 code coverage: enabled 2021/02/23 02:50:28 comparison tracing: enabled 2021/02/23 02:50:28 extra coverage: enabled 2021/02/23 02:50:28 setuid sandbox: enabled 2021/02/23 02:50:28 namespace sandbox: enabled 2021/02/23 02:50:28 Android sandbox: /sys/fs/selinux/policy does not exist 2021/02/23 02:50:28 fault injection: enabled 2021/02/23 02:50:28 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/02/23 02:50:28 net packet injection: enabled 2021/02/23 02:50:28 net device setup: enabled 2021/02/23 02:50:28 concurrency sanitizer: enabled 2021/02/23 02:50:28 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/02/23 02:50:28 USB emulation: enabled 2021/02/23 02:50:28 hci packet injection: enabled 2021/02/23 02:50:28 wifi device emulation: enabled 2021/02/23 02:50:28 802.15.4 emulation: enabled 2021/02/23 02:50:29 suppressing KCSAN reports in functions: 'alloc_pid' 'do_sys_poll' '__send_signal' 'jbd2_journal_dirty_metadata' '__xa_clear_mark' 'expire_timers' 'find_get_pages_range_tag' 'jbd2_journal_commit_transaction' 2021/02/23 02:50:29 fetching corpus: 0, signal 0/2000 (executing program) 2021/02/23 02:50:29 fetching corpus: 50, signal 21584/24801 (executing program) 2021/02/23 02:50:29 fetching corpus: 100, signal 32562/36798 (executing program) 2021/02/23 02:50:29 fetching corpus: 150, signal 40711/45787 (executing program) 2021/02/23 02:50:29 fetching corpus: 200, signal 47123/52942 (executing program) 2021/02/23 02:50:30 fetching corpus: 250, signal 54201/60459 (executing program) 2021/02/23 02:50:30 fetching corpus: 300, signal 60515/67073 (executing program) 2021/02/23 02:50:30 fetching corpus: 350, signal 64058/71053 (executing program) 2021/02/23 02:50:30 fetching corpus: 400, signal 69549/76608 (executing program) 2021/02/23 02:50:30 fetching corpus: 450, signal 72264/79627 (executing program) 2021/02/23 02:50:30 fetching corpus: 500, signal 75424/82898 (executing program) 2021/02/23 02:50:30 fetching corpus: 550, signal 78846/86318 (executing program) 2021/02/23 02:50:30 fetching corpus: 600, signal 82880/90152 (executing program) 2021/02/23 02:50:31 fetching corpus: 650, signal 85685/92861 (executing program) 2021/02/23 02:50:31 fetching corpus: 700, signal 89319/96056 (executing program) 2021/02/23 02:50:31 fetching corpus: 750, signal 91662/98257 (executing program) 2021/02/23 02:50:31 fetching corpus: 800, signal 93936/100253 (executing program) 2021/02/23 02:50:31 fetching corpus: 849, signal 95556/101751 (executing program) 2021/02/23 02:50:31 fetching corpus: 897, signal 98283/103905 (executing program) 2021/02/23 02:50:31 fetching corpus: 947, signal 100866/105888 (executing program) 2021/02/23 02:50:32 fetching corpus: 997, signal 102991/107522 (executing program) 2021/02/23 02:50:32 fetching corpus: 1047, signal 105251/109131 (executing program) 2021/02/23 02:50:32 fetching corpus: 1097, signal 107539/110678 (executing program) 2021/02/23 02:50:32 fetching corpus: 1147, signal 109642/112105 (executing program) 2021/02/23 02:50:32 fetching corpus: 1197, signal 111573/113324 (executing program) 2021/02/23 02:50:32 fetching corpus: 1247, signal 112739/114032 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114391 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114431 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114467 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114508 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114557 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114586 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114627 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114678 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114723 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114769 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114796 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114844 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114880 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114916 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/114955 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115000 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115044 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115089 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115123 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115173 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115224 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115266 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115310 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115344 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115378 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115414 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115459 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115495 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115517 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115559 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115598 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115602 (executing program) 2021/02/23 02:50:32 fetching corpus: 1268, signal 113323/115602 (executing program) 2021/02/23 02:50:34 starting 6 fuzzer processes 02:50:34 executing program 0: r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x0, 0x0, 0x0, 0x10, 0x458, 0x5019, 0x0, 0x0, 0x0, 0x0, 0x1, [{{0x9, 0x2, 0x24, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x1, 0x3, 0x0, 0x0, 0x0, {0x9, 0x21, 0x0, 0x0, 0x1, {0x22, 0x1dc}}}}]}}]}}, 0x0) syz_usb_control_io$hid(r0, &(0x7f0000000200)={0x24, 0x0, &(0x7f0000000100)={0x0, 0x3, 0x46, @string={0x46, 0x3, "408bb0a98605dd2b585ebe00867aade009f18abd3037fa4d1442cf70b3a3f39f1eaad9b9077a6688747847eb01ed484e98d77f2c2e20987ae082bb1583119f0c2ab40996"}}, 0x0, 0x0}, 0x0) syz_usb_control_io(r0, &(0x7f0000000340)={0x18, &(0x7f0000000040)=ANY=[@ANYBLOB="0000b803"], 0x0, 0x0, 0x0, 0x0}, 0x0) syzkaller login: [ 35.839241][ T8311] ================================================================== [ 35.847521][ T8311] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 35.855093][ T8311] [ 35.857406][ T8311] write to 0xffff888140d20af0 of 4 bytes by task 8335 on cpu 0: [ 35.865032][ T8311] propagate_one+0x32d/0x400 [ 35.869639][ T8311] propagate_mnt+0x2f8/0x640 [ 35.874225][ T8311] attach_recursive_mnt+0x4fb/0x11c0 [ 35.879677][ T8311] path_mount+0x1b71/0x1ca0 [ 35.884248][ T8311] __se_sys_mount+0x23d/0x2e0 [ 35.889017][ T8311] __x64_sys_mount+0x63/0x70 [ 35.893601][ T8311] do_syscall_64+0x39/0x80 [ 35.898004][ T8311] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 35.903904][ T8311] [ 35.906993][ T8311] read to 0xffff888140d20af0 of 4 bytes by task 8311 on cpu 1: [ 35.915226][ T8311] atime_needs_update+0x133/0x370 [ 35.920353][ T8311] touch_atime+0x55/0x2d0 [ 35.924665][ T8311] generic_file_buffered_read+0x945/0x9c0 [ 35.930366][ T8311] generic_file_read_iter+0x82/0x3e0 [ 35.936355][ T8311] ext4_file_read_iter+0x2e0/0x420 [ 35.941452][ T8311] __kernel_read+0x306/0x580 [ 35.946024][ T8311] integrity_kernel_read+0x4c/0x70 [ 35.951129][ T8311] ima_calc_file_hash+0x929/0x1310 [ 35.956343][ T8311] ima_collect_measurement+0x168/0x310 [ 35.962057][ T8311] process_measurement+0xa4c/0x10c0 [ 35.967252][ T8311] ima_file_check+0x75/0xa0 [ 35.972792][ T8311] path_openat+0x1851/0x2050 [ 35.979621][ T8311] do_filp_open+0xbd/0x1d0 [ 35.984542][ T8311] do_sys_openat2+0xa3/0x250 [ 35.989499][ T8311] __x64_sys_openat+0xef/0x110 [ 35.994319][ T8311] do_syscall_64+0x39/0x80 [ 35.998823][ T8311] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 36.004714][ T8311] [ 36.007017][ T8311] Reported by Kernel Concurrency Sanitizer on: [ 36.013144][ T8311] CPU: 1 PID: 8311 Comm: syz-fuzzer Not tainted 5.11.0-syzkaller #0 [ 36.021287][ T8311] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.031325][ T8311] ================================================================== [ 36.039379][ T8311] Kernel panic - not syncing: panic_on_warn set ... [ 36.046526][ T8311] CPU: 1 PID: 8311 Comm: syz-fuzzer Not tainted 5.11.0-syzkaller #0 [ 36.054941][ T8311] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.065714][ T8311] Call Trace: [ 36.069014][ T8311] dump_stack+0x137/0x19d [ 36.073353][ T8311] panic+0x1e7/0x5fa [ 36.077251][ T8311] ? vprintk_emit+0x2fa/0x3e0 [ 36.082014][ T8311] kcsan_report+0x67b/0x680 [ 36.086603][ T8311] ? kcsan_setup_watchpoint+0x40b/0x470 [ 36.092144][ T8311] ? atime_needs_update+0x133/0x370 [ 36.097343][ T8311] ? touch_atime+0x55/0x2d0 [ 36.101847][ T8311] ? generic_file_buffered_read+0x945/0x9c0 [ 36.107737][ T8311] ? generic_file_read_iter+0x82/0x3e0 [ 36.113658][ T8311] ? ext4_file_read_iter+0x2e0/0x420 [ 36.118950][ T8311] ? __kernel_read+0x306/0x580 [ 36.123845][ T8311] ? integrity_kernel_read+0x4c/0x70 [ 36.129133][ T8311] ? ima_calc_file_hash+0x929/0x1310 [ 36.134853][ T8311] ? ima_collect_measurement+0x168/0x310 [ 36.140488][ T8311] ? process_measurement+0xa4c/0x10c0 [ 36.145870][ T8311] ? ima_file_check+0x75/0xa0 [ 36.151239][ T8311] ? path_openat+0x1851/0x2050 [ 36.156347][ T8311] ? do_filp_open+0xbd/0x1d0 [ 36.161150][ T8311] ? do_sys_openat2+0xa3/0x250 [ 36.165915][ T8311] ? __x64_sys_openat+0xef/0x110 [ 36.173288][ T8311] ? do_syscall_64+0x39/0x80 [ 36.178329][ T8311] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 36.184412][ T8311] ? find_get_pages_contig+0x4a9/0x4e0 [ 36.189885][ T8311] ? __virt_addr_valid+0x15a/0x1a0 [ 36.195021][ T8311] kcsan_setup_watchpoint+0x40b/0x470 [ 36.203447][ T8311] ? __check_object_size+0x253/0x310 [ 36.208748][ T8311] atime_needs_update+0x133/0x370 [ 36.213786][ T8311] touch_atime+0x55/0x2d0 [ 36.218152][ T8311] generic_file_buffered_read+0x945/0x9c0 [ 36.223892][ T8311] generic_file_read_iter+0x82/0x3e0 [ 36.229181][ T8311] ext4_file_read_iter+0x2e0/0x420 [ 36.234297][ T8311] __kernel_read+0x306/0x580 [ 36.238977][ T8311] integrity_kernel_read+0x4c/0x70 [ 36.244083][ T8311] ima_calc_file_hash+0x929/0x1310 [ 36.249191][ T8311] ? ima_write_template_field_data+0x41/0x120 [ 36.255277][ T8311] ? integrity_audit_message+0x7b/0x280 [ 36.260815][ T8311] ? widen_string+0x3a/0x280 [ 36.265394][ T8311] ? format_decode+0x1e3/0x8a0 [ 36.270171][ T8311] ? __down_read_common+0x14e/0x510 [ 36.275374][ T8311] ? __rcu_read_unlock+0x45/0x250 [ 36.280422][ T8311] ? ext4_xattr_ibody_get+0x68/0x630 [ 36.285721][ T8311] ? aa_get_newest_label+0x74/0x250 [ 36.290918][ T8311] ? ext4_xattr_get+0x27d/0x580 [ 36.295765][ T8311] ? ima_match_policy+0xb1a/0xb50 [ 36.300791][ T8311] ima_collect_measurement+0x168/0x310 [ 36.306257][ T8311] process_measurement+0xa4c/0x10c0 [ 36.311481][ T8311] ? dquot_file_open+0x68/0x80 [ 36.316237][ T8311] ? ext4_file_open+0x186/0x570 [ 36.321085][ T8311] ? aa_get_newest_label+0x74/0x250 [ 36.327494][ T8311] ? fsnotify_perm+0x299/0x2e0 [ 36.332253][ T8311] ? __rcu_read_unlock+0x5c/0x250 [ 36.337271][ T8311] ? aa_get_task_label+0x72/0xc0 [ 36.342203][ T8311] ? apparmor_task_getsecid+0x81/0xa0 [ 36.347691][ T8311] ima_file_check+0x75/0xa0 [ 36.352188][ T8311] path_openat+0x1851/0x2050 [ 36.356775][ T8311] ? do_numa_page+0x543/0x630 [ 36.361445][ T8311] do_filp_open+0xbd/0x1d0 [ 36.365864][ T8311] ? _raw_spin_unlock+0x22/0x40 [ 36.370731][ T8311] ? alloc_fd+0x35d/0x3b0 [ 36.375144][ T8311] do_sys_openat2+0xa3/0x250 [ 36.379730][ T8311] ? do_user_addr_fault+0x751/0xc00 [ 36.384924][ T8311] __x64_sys_openat+0xef/0x110 [ 36.389683][ T8311] do_syscall_64+0x39/0x80 [ 36.394099][ T8311] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 36.399993][ T8311] RIP: 0033:0x4af20a [ 36.403877][ T8311] Code: e8 3b 82 fb 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 [ 36.423482][ T8311] RSP: 002b:000000c0004417a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 36.431898][ T8311] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af20a [ 36.439952][ T8311] RDX: 0000000000080002 RSI: 000000c0003a5000 RDI: ffffffffffffff9c [ 36.447925][ T8311] RBP: 000000c000441818 R08: 0000000000000000 R09: 0000000000000000 [ 36.455905][ T8311] R10: 00000000000001a4 R11: 0000000000000202 R12: 0000000000000040 [ 36.463871][ T8311] R13: 0000000000000040 R14: 000000000092fbd6 R15: 0000000000000000 [ 36.472313][ T8311] Kernel Offset: disabled [ 36.476634][ T8311] Rebooting in 86400 seconds..