[ 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 '10.128.0.165' (ECDSA) to the list of known hosts. 2020/11/26 11:48:29 fuzzer started 2020/11/26 11:48:30 dialing manager at 10.128.0.105:43143 2020/11/26 11:48:32 syscalls: 3447 2020/11/26 11:48:32 code coverage: enabled 2020/11/26 11:48:32 comparison tracing: enabled 2020/11/26 11:48:32 extra coverage: enabled 2020/11/26 11:48:32 setuid sandbox: enabled 2020/11/26 11:48:32 namespace sandbox: enabled 2020/11/26 11:48:32 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/26 11:48:32 fault injection: enabled 2020/11/26 11:48:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/26 11:48:32 net packet injection: enabled 2020/11/26 11:48:32 net device setup: enabled 2020/11/26 11:48:32 concurrency sanitizer: enabled 2020/11/26 11:48:32 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/26 11:48:32 USB emulation: enabled 2020/11/26 11:48:32 hci packet injection: enabled 2020/11/26 11:48:32 wifi device emulation: enabled 2020/11/26 11:48:33 suppressing KCSAN reports in functions: 'io_sq_thread' 'do_sys_poll' 'blk_mq_rq_ctx_init' 'ext4_mb_regular_allocator' 'complete_signal' 'do_select' 'blk_mq_sched_dispatch_requests' 'generic_write_end' '__ext4_new_inode' 'ext4_free_inodes_count' 'snd_rawmidi_poll' 'shmem_mknod' '__xa_clear_mark' 'exit_mm' 'blk_mq_dispatch_rq_list' 'alloc_pid' 'ext4_free_inode' 'futex_wait_queue_me' 11:48:53 executing program 0: r0 = socket$inet_udp(0x2, 0x2, 0x0) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) r2 = socket$inet6(0xa, 0x2, 0x0) sendmmsg$inet6(r2, &(0x7f00000025c0)=[{{&(0x7f0000000180)={0xa, 0x4e20, 0x0, @dev}, 0x1c, &(0x7f00000013c0)=[{&(0x7f00000001c0)="85525f6b0196a105342ca2c910a031", 0xf}, {&(0x7f0000000240)="f1348694b932cfbbab283c8be2797df57e39d64989c3ed83d71c62f61bd032ff68bb18ff40a18a99d2ac03bb6cdc09e8ce6ad932837d6e0612e0b53cb78c0bd7d52a40d252ced3da01379a62632d2267e555bac364a3df956f9850e36c87cbba70bd66da0f2356d01d32985012495b59a7e4e4cdc7313cb7b12890e00365d574c6804c34f31598df58f49d03845ca84d40b0b46e77f7b64e908d25f5eee7e8235adcf69adf030b73ca8e9d1c959b3994383824978102647ef1d1b0f16b762f26be7cdeb4325f3a383ee43f7c363dc0da55241ec1d97b", 0xd6}, {&(0x7f0000000340)="77a841e4d9aa8a158e7785f3ddbbc2a8821606282b01260d16a74edb09dbe0d350cb95ed7bdc44c46fd75a40c9bd3a9672ac61e390de5b1158ed900f471501da829d0a9e7c89d6133fb8db", 0x4b}, {&(0x7f00000003c0)="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", 0x464}], 0x4, &(0x7f0000001440)=[@dstopts_2292={{0x30, 0x29, 0x4, {0x0, 0x2, [], [@hao={0xc9, 0x10, @mcast2}]}}}], 0x30}}, {{0x0, 0x0, &(0x7f00000016c0)=[{&(0x7f0000001500)="e6", 0x1}], 0x1}}], 0x4000393, 0x2004c840) syzkaller login: [ 52.760865][ T8432] ================================================================== [ 52.769029][ T8432] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 52.776466][ T8432] [ 52.778794][ T8432] read-write to 0xffff888141e354b0 of 4 bytes by task 8454 on cpu 1: [ 52.786836][ T8432] propagate_one+0x323/0x3f0 [ 52.791407][ T8432] propagate_mnt+0x2f8/0x650 [ 52.795975][ T8432] attach_recursive_mnt+0x4fb/0x1180 [ 52.801228][ T8432] path_mount+0x1aed/0x1c10 [ 52.805705][ T8432] __se_sys_mount+0x23d/0x2e0 [ 52.810353][ T8432] __x64_sys_mount+0x63/0x70 [ 52.814931][ T8432] do_syscall_64+0x39/0x80 [ 52.819327][ T8432] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.825193][ T8432] [ 52.827496][ T8432] read to 0xffff888141e354b0 of 4 bytes by task 8432 on cpu 0: [ 52.835009][ T8432] atime_needs_update+0x133/0x370 [ 52.840011][ T8432] touch_atime+0x55/0x2d0 [ 52.844313][ T8432] generic_file_buffered_read+0x1b30/0x23a0 [ 52.850183][ T8432] generic_file_read_iter+0x80/0x3d0 [ 52.855452][ T8432] ext4_file_read_iter+0x2d0/0x420 [ 52.860538][ T8432] __kernel_read+0x307/0x560 [ 52.865100][ T8432] integrity_kernel_read+0x4c/0x70 [ 52.870182][ T8432] ima_calc_file_hash+0x9c7/0x1430 [ 52.875277][ T8432] ima_collect_measurement+0x168/0x300 [ 52.880711][ T8432] process_measurement+0x9f1/0x1050 [ 52.885897][ T8432] ima_file_check+0x72/0xa0 [ 52.890380][ T8432] path_openat+0x1887/0x20a0 [ 52.894939][ T8432] do_filp_open+0xbd/0x1d0 [ 52.899324][ T8432] do_sys_openat2+0xa3/0x240 [ 52.903885][ T8432] __x64_sys_openat+0xef/0x110 [ 52.908618][ T8432] do_syscall_64+0x39/0x80 [ 52.913003][ T8432] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.918869][ T8432] [ 52.921165][ T8432] Reported by Kernel Concurrency Sanitizer on: [ 52.927290][ T8432] CPU: 0 PID: 8432 Comm: syz-fuzzer Not tainted 5.10.0-rc5-syzkaller #0 [ 52.935581][ T8432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.945605][ T8432] ================================================================== [ 52.954328][ T8432] Kernel panic - not syncing: panic_on_warn set ... [ 52.960974][ T8432] CPU: 0 PID: 8432 Comm: syz-fuzzer Not tainted 5.10.0-rc5-syzkaller #0 [ 52.970403][ T8432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.980427][ T8432] Call Trace: [ 52.983701][ T8432] dump_stack+0x116/0x15d [ 52.988003][ T8432] panic+0x1e7/0x5fa [ 52.991871][ T8432] ? vprintk_emit+0x2f2/0x370 [ 52.996519][ T8432] kcsan_report+0x67b/0x680 [ 53.000995][ T8432] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 53.006510][ T8432] ? atime_needs_update+0x133/0x370 [ 53.011677][ T8432] ? touch_atime+0x55/0x2d0 [ 53.016151][ T8432] ? generic_file_buffered_read+0x1b30/0x23a0 [ 53.022185][ T8432] ? generic_file_read_iter+0x80/0x3d0 [ 53.027624][ T8432] ? ext4_file_read_iter+0x2d0/0x420 [ 53.032879][ T8432] ? __kernel_read+0x307/0x560 [ 53.037654][ T8432] ? integrity_kernel_read+0x4c/0x70 [ 53.042921][ T8432] ? ima_calc_file_hash+0x9c7/0x1430 [ 53.048186][ T8432] ? ima_collect_measurement+0x168/0x300 [ 53.053791][ T8432] ? process_measurement+0x9f1/0x1050 [ 53.059131][ T8432] ? ima_file_check+0x72/0xa0 [ 53.063798][ T8432] ? path_openat+0x1887/0x20a0 [ 53.068531][ T8432] ? do_filp_open+0xbd/0x1d0 [ 53.073103][ T8432] ? do_sys_openat2+0xa3/0x240 [ 53.077836][ T8432] ? __x64_sys_openat+0xef/0x110 [ 53.082750][ T8432] ? do_syscall_64+0x39/0x80 [ 53.087325][ T8432] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.093369][ T8432] ? sched_clock+0xf/0x20 [ 53.097669][ T8432] ? sched_clock_cpu+0x11/0x1a0 [ 53.102496][ T8432] ? irqtime_account_irq+0x2a/0x90 [ 53.107581][ T8432] kcsan_setup_watchpoint+0x46a/0x4d0 [ 53.112930][ T8432] ? __check_object_size+0x253/0x310 [ 53.118196][ T8432] atime_needs_update+0x133/0x370 [ 53.123191][ T8432] touch_atime+0x55/0x2d0 [ 53.127498][ T8432] ? mark_page_accessed+0x529/0x5e0 [ 53.132668][ T8432] generic_file_buffered_read+0x1b30/0x23a0 [ 53.138548][ T8432] ? __list_add_valid+0x28/0x90 [ 53.143369][ T8432] ? _raw_spin_unlock_irq+0x22/0x40 [ 53.148535][ T8432] generic_file_read_iter+0x80/0x3d0 [ 53.153791][ T8432] ? __schedule+0x39b/0x550 [ 53.158272][ T8432] ? preempt_schedule+0x54/0x80 [ 53.163093][ T8432] ? preempt_schedule_thunk+0x16/0x18 [ 53.168436][ T8432] ext4_file_read_iter+0x2d0/0x420 [ 53.173529][ T8432] __kernel_read+0x307/0x560 [ 53.178091][ T8432] integrity_kernel_read+0x4c/0x70 [ 53.183173][ T8432] ima_calc_file_hash+0x9c7/0x1430 [ 53.188255][ T8432] ? finish_task_switch+0x81/0x280 [ 53.193340][ T8432] ? preempt_schedule_irq+0x43/0x80 [ 53.198508][ T8432] ? widen_string+0x3a/0x280 [ 53.203077][ T8432] ? format_decode+0x1d3/0x840 [ 53.207983][ T8432] ? string+0x1f9/0x210 [ 53.212119][ T8432] ? __rcu_read_unlock+0x3a/0x220 [ 53.217125][ T8432] ? ext4_xattr_ibody_get+0x68/0x630 [ 53.222381][ T8432] ? aa_get_newest_label+0x74/0x250 [ 53.227557][ T8432] ? apparmor_capable+0xfe/0x160 [ 53.232480][ T8432] ? __rcu_read_unlock+0x3a/0x220 [ 53.237476][ T8432] ? ext4_xattr_get+0x27d/0x580 [ 53.242312][ T8432] ? ima_match_policy+0xa54/0xa90 [ 53.247332][ T8432] ima_collect_measurement+0x168/0x300 [ 53.252764][ T8432] process_measurement+0x9f1/0x1050 [ 53.257929][ T8432] ? dquot_file_open+0x68/0x80 [ 53.262663][ T8432] ? ext4_file_open+0x186/0x4f0 [ 53.267494][ T8432] ? aa_get_newest_label+0x74/0x250 [ 53.272665][ T8432] ? __rcu_read_unlock+0x51/0x220 [ 53.277707][ T8432] ? fsnotify_perm+0x296/0x2d0 [ 53.282445][ T8432] ? aa_get_task_label+0x72/0xc0 [ 53.287353][ T8432] ? apparmor_task_getsecid+0x81/0xa0 [ 53.292694][ T8432] ima_file_check+0x72/0xa0 [ 53.297171][ T8432] path_openat+0x1887/0x20a0 [ 53.301733][ T8432] ? __ext4_mark_inode_dirty+0x46a/0x610 [ 53.307340][ T8432] do_filp_open+0xbd/0x1d0 [ 53.311735][ T8432] ? _raw_spin_unlock+0x22/0x40 [ 53.316563][ T8432] ? __alloc_fd+0x33c/0x390 [ 53.321038][ T8432] do_sys_openat2+0xa3/0x240 [ 53.325622][ T8432] ? mem_cgroup_handle_over_high+0x34/0x4d0 [ 53.331492][ T8432] __x64_sys_openat+0xef/0x110 [ 53.336241][ T8432] do_syscall_64+0x39/0x80 [ 53.340645][ T8432] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.346521][ T8432] RIP: 0033:0x4b3d4a [ 53.350388][ T8432] 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 [ 53.369968][ T8432] RSP: 002b:000000c0061e9808 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 53.378359][ T8432] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3d4a [ 53.386303][ T8432] RDX: 0000000000080002 RSI: 000000c005fb8460 RDI: ffffffffffffff9c [ 53.394264][ T8432] RBP: 000000c0061e9880 R08: 0000000000000000 R09: 0000000000000000 [ 53.402220][ T8432] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 53.410163][ T8432] R13: 0000000000000024 R14: 0000000000000023 R15: 0000000000000100 [ 53.418586][ T8432] Kernel Offset: disabled [ 53.422896][ T8432] Rebooting in 86400 seconds..