[ 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 '10.128.0.217' (ECDSA) to the list of known hosts. 2020/12/14 07:39:07 fuzzer started 2020/12/14 07:39:07 dialing manager at 10.128.0.105:36191 2020/12/14 07:39:10 syscalls: 3464 2020/12/14 07:39:10 code coverage: enabled 2020/12/14 07:39:10 comparison tracing: enabled 2020/12/14 07:39:10 extra coverage: enabled 2020/12/14 07:39:10 setuid sandbox: enabled 2020/12/14 07:39:10 namespace sandbox: enabled 2020/12/14 07:39:10 Android sandbox: /sys/fs/selinux/policy does not exist 2020/12/14 07:39:10 fault injection: enabled 2020/12/14 07:39:10 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/12/14 07:39:10 net packet injection: enabled 2020/12/14 07:39:10 net device setup: enabled 2020/12/14 07:39:10 concurrency sanitizer: enabled 2020/12/14 07:39:10 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/12/14 07:39:10 USB emulation: enabled 2020/12/14 07:39:10 hci packet injection: enabled 2020/12/14 07:39:10 wifi device emulation: enabled 2020/12/14 07:39:12 suppressing KCSAN reports in functions: '__ext4_new_inode' 'snd_rawmidi_kernel_write1' 'generic_write_end' 'ext4_free_inodes_count' 'isolate_migratepages_block' 'ext4_mb_good_group' 'ext4_mark_iloc_dirty' '__io_cqring_fill_event' 'blk_mq_dispatch_rq_list' 'blk_mq_rq_ctx_init' 'audit_log_start' 'do_nanosleep' 'alloc_pid' 'shmem_mknod' 'pcpu_alloc' 'blk_mq_sched_dispatch_requests' 'kauditd_thread' '__delete_from_page_cache' 'dd_has_work' '__ext4_update_other_inode_time' 'ext4_free_inode' 'ext4_mb_regular_allocator' '__mark_inode_dirty' 'find_get_pages_range_tag' 'xas_clear_mark' '__xa_clear_mark' 'exit_mm' 'complete_signal' 07:39:43 executing program 0: seccomp$SECCOMP_SET_MODE_FILTER(0x1, 0x0, &(0x7f0000000080)={0x1, &(0x7f0000000040)=[{0x6, 0x0, 0x0, 0x7fffffff}]}) setfsgid(0x0) syzkaller login: [ 66.308332][ T8455] ================================================================== [ 66.316438][ T8455] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 66.323872][ T8455] [ 66.326213][ T8455] read-write to 0xffff88810154c7b0 of 4 bytes by task 8478 on cpu 1: [ 66.334267][ T8455] propagate_one+0x323/0x3f0 [ 66.338844][ T8455] propagate_mnt+0x2f8/0x650 [ 66.343408][ T8455] attach_recursive_mnt+0x4fb/0x1180 [ 66.348664][ T8455] path_mount+0x1aed/0x1c10 [ 66.353149][ T8455] __se_sys_mount+0x23d/0x2e0 [ 66.357820][ T8455] __x64_sys_mount+0x63/0x70 [ 66.362397][ T8455] do_syscall_64+0x39/0x80 [ 66.366785][ T8455] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.372640][ T8455] [ 66.374940][ T8455] read to 0xffff88810154c7b0 of 4 bytes by task 8455 on cpu 0: [ 66.382542][ T8455] atime_needs_update+0x133/0x370 [ 66.387553][ T8455] touch_atime+0x55/0x2d0 [ 66.391855][ T8455] generic_file_buffered_read+0x1b30/0x23a0 [ 66.397723][ T8455] generic_file_read_iter+0x80/0x3d0 [ 66.402991][ T8455] ext4_file_read_iter+0x2d0/0x420 [ 66.408089][ T8455] __kernel_read+0x307/0x560 [ 66.412652][ T8455] integrity_kernel_read+0x4c/0x70 [ 66.417734][ T8455] ima_calc_file_hash+0x9c7/0x1430 [ 66.422817][ T8455] ima_collect_measurement+0x168/0x300 [ 66.428250][ T8455] process_measurement+0x9f1/0x1050 [ 66.433424][ T8455] ima_file_check+0x72/0xa0 [ 66.437919][ T8455] path_openat+0x1887/0x20a0 [ 66.442479][ T8455] do_filp_open+0xbd/0x1d0 [ 66.446872][ T8455] do_sys_openat2+0xa3/0x240 [ 66.451452][ T8455] __x64_sys_openat+0xef/0x110 [ 66.456204][ T8455] do_syscall_64+0x39/0x80 [ 66.460608][ T8455] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.466467][ T8455] [ 66.468765][ T8455] Reported by Kernel Concurrency Sanitizer on: [ 66.474909][ T8455] CPU: 0 PID: 8455 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 66.482868][ T8455] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.492910][ T8455] ================================================================== [ 66.500943][ T8455] Kernel panic - not syncing: panic_on_warn set ... [ 66.507521][ T8455] CPU: 0 PID: 8455 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 66.515463][ T8455] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.525493][ T8455] Call Trace: [ 66.528761][ T8455] dump_stack+0x116/0x15d [ 66.533078][ T8455] panic+0x1e7/0x5fa [ 66.536964][ T8455] ? vprintk_emit+0x2f2/0x370 [ 66.541626][ T8455] kcsan_report+0x67b/0x680 [ 66.546102][ T8455] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 66.551637][ T8455] ? atime_needs_update+0x133/0x370 [ 66.556808][ T8455] ? touch_atime+0x55/0x2d0 [ 66.561296][ T8455] ? generic_file_buffered_read+0x1b30/0x23a0 [ 66.567333][ T8455] ? generic_file_read_iter+0x80/0x3d0 [ 66.572762][ T8455] ? ext4_file_read_iter+0x2d0/0x420 [ 66.578034][ T8455] ? __kernel_read+0x307/0x560 [ 66.582872][ T8455] ? integrity_kernel_read+0x4c/0x70 [ 66.588134][ T8455] ? ima_calc_file_hash+0x9c7/0x1430 [ 66.593396][ T8455] ? ima_collect_measurement+0x168/0x300 [ 66.599011][ T8455] ? process_measurement+0x9f1/0x1050 [ 66.604368][ T8455] ? ima_file_check+0x72/0xa0 [ 66.609033][ T8455] ? path_openat+0x1887/0x20a0 [ 66.613777][ T8455] ? do_filp_open+0xbd/0x1d0 [ 66.618340][ T8455] ? do_sys_openat2+0xa3/0x240 [ 66.623096][ T8455] ? __x64_sys_openat+0xef/0x110 [ 66.628021][ T8455] ? do_syscall_64+0x39/0x80 [ 66.632585][ T8455] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.638643][ T8455] ? page_cache_ra_unbounded+0x484/0x4c0 [ 66.644249][ T8455] kcsan_setup_watchpoint+0x46a/0x4d0 [ 66.649594][ T8455] ? __check_object_size+0x253/0x310 [ 66.654850][ T8455] atime_needs_update+0x133/0x370 [ 66.660366][ T8455] touch_atime+0x55/0x2d0 [ 66.664681][ T8455] ? mark_page_accessed+0x529/0x5e0 [ 66.669868][ T8455] generic_file_buffered_read+0x1b30/0x23a0 [ 66.675746][ T8455] generic_file_read_iter+0x80/0x3d0 [ 66.681021][ T8455] ext4_file_read_iter+0x2d0/0x420 [ 66.686124][ T8455] __kernel_read+0x307/0x560 [ 66.690719][ T8455] integrity_kernel_read+0x4c/0x70 [ 66.695811][ T8455] ima_calc_file_hash+0x9c7/0x1430 [ 66.700894][ T8455] ? __switch_to+0x14e/0x4c0 [ 66.705508][ T8455] ? __switch_to+0x14e/0x4c0 [ 66.710070][ T8455] ? widen_string+0x3a/0x280 [ 66.714904][ T8455] ? format_decode+0x1d3/0x840 [ 66.719640][ T8455] ? string+0x1f9/0x210 [ 66.723780][ T8455] ? __rcu_read_unlock+0x3a/0x220 [ 66.728799][ T8455] ? ext4_xattr_ibody_get+0x68/0x630 [ 66.734077][ T8455] ? aa_get_newest_label+0x74/0x250 [ 66.739271][ T8455] ? apparmor_capable+0xfe/0x160 [ 66.744182][ T8455] ? __rcu_read_unlock+0x3a/0x220 [ 66.749183][ T8455] ? ext4_xattr_get+0x27d/0x580 [ 66.754009][ T8455] ? ima_match_policy+0xa54/0xa90 [ 66.759009][ T8455] ima_collect_measurement+0x168/0x300 [ 66.764465][ T8455] process_measurement+0x9f1/0x1050 [ 66.769638][ T8455] ? dquot_file_open+0x68/0x80 [ 66.774376][ T8455] ? ext4_file_open+0x186/0x4f0 [ 66.779384][ T8455] ? aa_get_newest_label+0x74/0x250 [ 66.784581][ T8455] ? __rcu_read_unlock+0x51/0x220 [ 66.789594][ T8455] ? fsnotify_perm+0x296/0x2d0 [ 66.794336][ T8455] ? aa_get_task_label+0x72/0xc0 [ 66.800219][ T8455] ? apparmor_task_getsecid+0x81/0xa0 [ 66.805569][ T8455] ima_file_check+0x72/0xa0 [ 66.810047][ T8455] path_openat+0x1887/0x20a0 [ 66.814622][ T8455] ? __ext4_mark_inode_dirty+0x46a/0x610 [ 66.820231][ T8455] do_filp_open+0xbd/0x1d0 [ 66.824623][ T8455] ? _raw_spin_unlock+0x22/0x40 [ 66.829464][ T8455] ? __alloc_fd+0x33c/0x390 [ 66.833943][ T8455] do_sys_openat2+0xa3/0x240 [ 66.838523][ T8455] ? mem_cgroup_handle_over_high+0x34/0x4d0 [ 66.844418][ T8455] __x64_sys_openat+0xef/0x110 [ 66.849160][ T8455] do_syscall_64+0x39/0x80 [ 66.853552][ T8455] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.859420][ T8455] RIP: 0033:0x4b3d4a [ 66.863292][ T8455] 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 [ 66.882891][ T8455] RSP: 002b:000000c0000ef808 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 66.891278][ T8455] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3d4a [ 66.899240][ T8455] RDX: 0000000000080002 RSI: 000000c00d1961c0 RDI: ffffffffffffff9c [ 66.907189][ T8455] RBP: 000000c0000ef880 R08: 0000000000000000 R09: 0000000000000000 [ 66.915147][ T8455] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 66.923098][ T8455] R13: 000000000000000f R14: 000000000000000e R15: 0000000000000100 [ 66.931473][ T8455] Kernel Offset: disabled [ 66.935790][ T8455] Rebooting in 86400 seconds..