[ 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 '10.128.10.37' (ECDSA) to the list of known hosts. 2020/11/15 21:32:46 fuzzer started 2020/11/15 21:32:46 dialing manager at 10.128.0.105:36437 2020/11/15 21:32:47 syscalls: 3448 2020/11/15 21:32:47 code coverage: enabled 2020/11/15 21:32:47 comparison tracing: enabled 2020/11/15 21:32:47 extra coverage: enabled 2020/11/15 21:32:47 setuid sandbox: enabled 2020/11/15 21:32:47 namespace sandbox: enabled 2020/11/15 21:32:47 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/15 21:32:47 fault injection: enabled 2020/11/15 21:32:47 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/15 21:32:47 net packet injection: enabled 2020/11/15 21:32:47 net device setup: enabled 2020/11/15 21:32:47 concurrency sanitizer: enabled 2020/11/15 21:32:47 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/15 21:32:47 USB emulation: enabled 2020/11/15 21:32:47 hci packet injection: enabled 2020/11/15 21:32:47 wifi device emulation: enabled 2020/11/15 21:32:52 suppressing KCSAN reports in functions: 'blk_mq_sched_dispatch_requests' '__ext4_new_inode' 'snd_rawmidi_poll' 'ext4_ext_handle_unwritten_extents' '__mark_inode_dirty' 'pcpu_alloc' 'ext4_free_inodes_count' 'ext4_mb_good_group' '__io_cqring_fill_event' 'tick_nohz_next_event' '__ext4_update_other_inode_time' '__es_shrink' 'wbt_wait' 'blk_mq_dispatch_rq_list' 'expire_timers' '__xa_set_mark' 'futex_wait_queue_me' 'wbt_done' 'ext4_handle_inode_extension' 'shmem_mknod' 'dput' 'generic_write_end' 'vfs_readlink' 'audit_log_start' 'xas_clear_mark' 'ext4_ext_try_to_merge_right' 'xas_find_marked' 'do_sys_poll' '__xa_clear_mark' 'complete_signal' 'blk_mq_rq_ctx_init' '_prb_read_valid' 'dd_has_work' 'kauditd_thread' 'do_nanosleep' 'wg_packet_decrypt_worker' 'ext4_free_inode' 'ext4_ext_insert_extent' 'n_tty_receive_buf_common' '__delayacct_blkio_end' '__delete_from_page_cache' 'do_signal_stop' '__add_to_page_cache_locked' 'ext4_mark_iloc_dirty' 'do_select' 'find_get_pages_range_tag' 'alloc_pid' 'wbt_issue' 21:34:16 executing program 0: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f00000001c0)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) syz_kvm_setup_cpu$x86(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f000005c000/0x18000)=nil, &(0x7f0000000100)=[@text16={0x10, &(0x7f0000000180)="6426f30fc7fb2e660f6f96416bd9e0f4f23ef0f65316f2adbaf80c66b8bc3e6c8166efbafc0cb0faee74e0bad004b000ee0fc7a20000", 0x36}], 0x1, 0x0, 0x0, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) perf_event_open(&(0x7f0000000000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) ioctl$FS_IOC_RESVSP(r2, 0x40305828, &(0x7f0000000200)={0x0, 0x2}) syz_open_procfs(0x0, &(0x7f0000000040)='smaps\x00') clock_gettime(0x0, 0x0) ioctl$KVM_SET_USER_MEMORY_REGION(r1, 0x4020ae46, &(0x7f0000bf7000)={0x0, 0x0, 0x0, 0x2000, &(0x7f0000000000/0x2000)=nil}) syz_kvm_setup_cpu$x86(0xffffffffffffffff, r2, &(0x7f0000049000/0x18000)=nil, &(0x7f0000000080)=[@textreal={0x8, 0x0}], 0x1, 0x0, 0x0, 0x0) ioctl$KVM_RUN(r2, 0xae80, 0x0) syzkaller login: [ 119.938143][ T8467] ================================================================== [ 119.946244][ T8467] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 119.953678][ T8467] [ 119.955997][ T8467] read-write to 0xffff888100cf3830 of 4 bytes by task 8477 on cpu 1: [ 119.964045][ T8467] propagate_one+0x323/0x3f0 [ 119.968625][ T8467] propagate_mnt+0x2f8/0x650 [ 119.973208][ T8467] attach_recursive_mnt+0x4fb/0x1180 [ 119.978480][ T8467] path_mount+0x1aed/0x1c10 [ 119.982970][ T8467] __se_sys_mount+0x23d/0x2e0 [ 119.987634][ T8467] __x64_sys_mount+0x63/0x70 [ 119.992211][ T8467] do_syscall_64+0x39/0x80 [ 119.996616][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.002486][ T8467] [ 120.004807][ T8467] read to 0xffff888100cf3830 of 4 bytes by task 8467 on cpu 0: [ 120.013042][ T8467] atime_needs_update+0x133/0x370 [ 120.018144][ T8467] touch_atime+0x55/0x2d0 [ 120.022462][ T8467] generic_file_buffered_read+0x1a1c/0x2110 [ 120.028373][ T8467] generic_file_read_iter+0x80/0x3d0 [ 120.033650][ T8467] ext4_file_read_iter+0x2d0/0x420 [ 120.038754][ T8467] __kernel_read+0x307/0x560 [ 120.043335][ T8467] integrity_kernel_read+0x4c/0x70 [ 120.048436][ T8467] ima_calc_file_hash+0x9c7/0x1430 [ 120.053544][ T8467] ima_collect_measurement+0x168/0x300 [ 120.058994][ T8467] process_measurement+0x9f1/0x1050 [ 120.064184][ T8467] ima_file_check+0x72/0xa0 [ 120.068677][ T8467] path_openat+0x1887/0x20a0 [ 120.073258][ T8467] do_filp_open+0xbd/0x1d0 [ 120.077663][ T8467] do_sys_openat2+0xa3/0x240 [ 120.082247][ T8467] __x64_sys_openat+0xef/0x110 [ 120.086999][ T8467] do_syscall_64+0x39/0x80 [ 120.091407][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.097367][ T8467] [ 120.099680][ T8467] Reported by Kernel Concurrency Sanitizer on: [ 120.105822][ T8467] CPU: 0 PID: 8467 Comm: syz-fuzzer Not tainted 5.10.0-rc3-syzkaller #0 [ 120.114129][ T8467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.124170][ T8467] ================================================================== [ 120.132222][ T8467] Kernel panic - not syncing: panic_on_warn set ... [ 120.138798][ T8467] CPU: 0 PID: 8467 Comm: syz-fuzzer Not tainted 5.10.0-rc3-syzkaller #0 [ 120.147101][ T8467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.157143][ T8467] Call Trace: [ 120.160424][ T8467] dump_stack+0x116/0x15d [ 120.164748][ T8467] panic+0x1e7/0x5fa [ 120.168642][ T8467] ? vprintk_emit+0x2f2/0x370 [ 120.173313][ T8467] kcsan_report+0x67b/0x680 [ 120.177809][ T8467] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 120.183344][ T8467] ? atime_needs_update+0x133/0x370 [ 120.188528][ T8467] ? touch_atime+0x55/0x2d0 [ 120.193021][ T8467] ? generic_file_buffered_read+0x1a1c/0x2110 [ 120.199076][ T8467] ? generic_file_read_iter+0x80/0x3d0 [ 120.204524][ T8467] ? ext4_file_read_iter+0x2d0/0x420 [ 120.209796][ T8467] ? __kernel_read+0x307/0x560 [ 120.214545][ T8467] ? integrity_kernel_read+0x4c/0x70 [ 120.219821][ T8467] ? ima_calc_file_hash+0x9c7/0x1430 [ 120.225096][ T8467] ? ima_collect_measurement+0x168/0x300 [ 120.230716][ T8467] ? process_measurement+0x9f1/0x1050 [ 120.236073][ T8467] ? ima_file_check+0x72/0xa0 [ 120.240735][ T8467] ? path_openat+0x1887/0x20a0 [ 120.245485][ T8467] ? do_filp_open+0xbd/0x1d0 [ 120.250064][ T8467] ? do_sys_openat2+0xa3/0x240 [ 120.254818][ T8467] ? __x64_sys_openat+0xef/0x110 [ 120.259746][ T8467] ? do_syscall_64+0x39/0x80 [ 120.264335][ T8467] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.270400][ T8467] ? page_cache_ra_unbounded+0x484/0x4c0 [ 120.276018][ T8467] kcsan_setup_watchpoint+0x46a/0x4d0 [ 120.281365][ T8467] ? __check_object_size+0x253/0x310 [ 120.286655][ T8467] atime_needs_update+0x133/0x370 [ 120.291653][ T8467] touch_atime+0x55/0x2d0 [ 120.295970][ T8467] ? mark_page_accessed+0x529/0x5e0 [ 120.301158][ T8467] generic_file_buffered_read+0x1a1c/0x2110 [ 120.307036][ T8467] generic_file_read_iter+0x80/0x3d0 [ 120.312299][ T8467] ext4_file_read_iter+0x2d0/0x420 [ 120.317387][ T8467] __kernel_read+0x307/0x560 [ 120.321955][ T8467] integrity_kernel_read+0x4c/0x70 [ 120.327057][ T8467] ima_calc_file_hash+0x9c7/0x1430 [ 120.332145][ T8467] ? __should_failslab+0x81/0x90 [ 120.337068][ T8467] ? integrity_audit_message+0x7b/0x280 [ 120.342586][ T8467] ? should_failslab+0x5/0x20 [ 120.347236][ T8467] ? slab_pre_alloc_hook+0x20/0xb0 [ 120.352326][ T8467] ? widen_string+0x3a/0x280 [ 120.356890][ T8467] ? format_decode+0x1d3/0x840 [ 120.361627][ T8467] ? string+0x1f9/0x210 [ 120.365755][ T8467] ? __rcu_read_unlock+0x3a/0x220 [ 120.370752][ T8467] ? ext4_xattr_ibody_get+0x68/0x630 [ 120.376010][ T8467] ? aa_get_newest_label+0x74/0x250 [ 120.381181][ T8467] ? apparmor_capable+0xfe/0x160 [ 120.386089][ T8467] ? __rcu_read_unlock+0x3a/0x220 [ 120.391087][ T8467] ? ext4_xattr_get+0x27d/0x580 [ 120.395913][ T8467] ? ima_match_policy+0xa54/0xa90 [ 120.400912][ T8467] ima_collect_measurement+0x168/0x300 [ 120.406346][ T8467] process_measurement+0x9f1/0x1050 [ 120.411520][ T8467] ? dquot_file_open+0x68/0x80 [ 120.416257][ T8467] ? ext4_file_open+0x186/0x4f0 [ 120.421081][ T8467] ? __rcu_read_unlock+0x51/0x220 [ 120.426079][ T8467] ? fsnotify_perm+0x296/0x2d0 [ 120.430818][ T8467] ? aa_get_task_label+0x72/0xc0 [ 120.435729][ T8467] ? apparmor_task_getsecid+0x81/0xa0 [ 120.441076][ T8467] ima_file_check+0x72/0xa0 [ 120.445552][ T8467] path_openat+0x1887/0x20a0 [ 120.450116][ T8467] ? __ext4_mark_inode_dirty+0x46a/0x610 [ 120.455724][ T8467] do_filp_open+0xbd/0x1d0 [ 120.460114][ T8467] ? _raw_spin_unlock+0x22/0x40 [ 120.464939][ T8467] ? __alloc_fd+0x33c/0x390 [ 120.469417][ T8467] do_sys_openat2+0xa3/0x240 [ 120.473981][ T8467] ? mem_cgroup_handle_over_high+0x34/0x4d0 [ 120.479849][ T8467] __x64_sys_openat+0xef/0x110 [ 120.484586][ T8467] do_syscall_64+0x39/0x80 [ 120.488979][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.494849][ T8467] RIP: 0033:0x4b3d4a [ 120.498720][ T8467] 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 [ 120.518308][ T8467] RSP: 002b:000000c00035b808 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 120.526704][ T8467] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3d4a [ 120.534671][ T8467] RDX: 0000000000080002 RSI: 000000c0243ac0c0 RDI: ffffffffffffff9c [ 120.542616][ T8467] RBP: 000000c00035b880 R08: 0000000000000000 R09: 0000000000000000 [ 120.550560][ T8467] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 120.558505][ T8467] R13: 0000000000000007 R14: 0000000000000006 R15: 0000000000000100 [ 120.567166][ T8467] Kernel Offset: disabled [ 120.571472][ T8467] Rebooting in 86400 seconds..