[ 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 '10.128.1.54' (ECDSA) to the list of known hosts. 2021/01/25 21:56:39 fuzzer started 2021/01/25 21:56:39 dialing manager at 10.128.0.105:43737 2021/01/25 21:56:40 syscalls: 3466 2021/01/25 21:56:40 code coverage: enabled 2021/01/25 21:56:40 comparison tracing: enabled 2021/01/25 21:56:40 extra coverage: enabled 2021/01/25 21:56:40 setuid sandbox: enabled 2021/01/25 21:56:40 namespace sandbox: enabled 2021/01/25 21:56:40 Android sandbox: /sys/fs/selinux/policy does not exist 2021/01/25 21:56:40 fault injection: enabled 2021/01/25 21:56:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/01/25 21:56:40 net packet injection: enabled 2021/01/25 21:56:40 net device setup: enabled 2021/01/25 21:56:40 concurrency sanitizer: enabled 2021/01/25 21:56:40 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/01/25 21:56:40 USB emulation: enabled 2021/01/25 21:56:40 hci packet injection: enabled 2021/01/25 21:56:40 wifi device emulation: enabled 2021/01/25 21:56:40 fetching corpus: 0, signal 0/0 (executing program) 2021/01/25 21:56:40 fetching corpus: 0, signal 0/0 (executing program) 2021/01/25 21:56:41 starting 6 fuzzer processes 21:56:41 executing program 0: r0 = fanotify_init(0x0, 0x0) r1 = epoll_create1(0x0) r2 = fcntl$dupfd(r1, 0x2, 0xffffffffffffffff) fanotify_mark(r0, 0x11, 0x48000038, r2, 0x0) r3 = epoll_create1(0x0) r4 = fcntl$dupfd(r3, 0x2, 0xffffffffffffffff) r5 = socket$inet_udplite(0x2, 0x2, 0x88) r6 = dup(r5) ioctl$PERF_EVENT_IOC_ENABLE(r6, 0x8912, 0x400200) fanotify_mark(r0, 0x16, 0x40000038, r4, 0x0) syzkaller login: [ 32.973670][ T8427] ================================================================== [ 32.981815][ T8427] BUG: KCSAN: data-race in atime_needs_update / propagate_one [ 32.989357][ T8427] [ 32.991673][ T8427] read-write to 0xffff888140d08730 of 4 bytes by task 8438 on cpu 0: [ 33.000772][ T8427] propagate_one+0x323/0x3f0 [ 33.005344][ T8427] propagate_mnt+0x2f8/0x650 [ 33.010012][ T8427] attach_recursive_mnt+0x4fb/0x1180 [ 33.015278][ T8427] path_mount+0x1aed/0x1c10 [ 33.019764][ T8427] __se_sys_mount+0x23d/0x2e0 [ 33.024425][ T8427] __x64_sys_mount+0x63/0x70 [ 33.028990][ T8427] do_syscall_64+0x39/0x80 [ 33.033392][ T8427] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.039273][ T8427] [ 33.041575][ T8427] read to 0xffff888140d08730 of 4 bytes by task 8427 on cpu 1: [ 33.049105][ T8427] atime_needs_update+0x133/0x370 [ 33.054112][ T8427] touch_atime+0x55/0x2d0 [ 33.058432][ T8427] generic_file_buffered_read+0x92b/0x9a0 [ 33.064151][ T8427] generic_file_read_iter+0x80/0x3d0 [ 33.069421][ T8427] ext4_file_read_iter+0x2d0/0x420 [ 33.074512][ T8427] __kernel_read+0x307/0x560 [ 33.079089][ T8427] integrity_kernel_read+0x4c/0x70 [ 33.084185][ T8427] ima_calc_file_hash+0x956/0x1390 [ 33.089356][ T8427] ima_collect_measurement+0x168/0x300 [ 33.094807][ T8427] process_measurement+0x9f1/0x1050 [ 33.100003][ T8427] ima_file_check+0x72/0xa0 [ 33.104500][ T8427] path_openat+0x1887/0x20a0 [ 33.109066][ T8427] do_filp_open+0xbd/0x1d0 [ 33.113478][ T8427] do_sys_openat2+0xa3/0x240 [ 33.118172][ T8427] __x64_sys_openat+0xef/0x110 [ 33.122915][ T8427] do_syscall_64+0x39/0x80 [ 33.127380][ T8427] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.133277][ T8427] [ 33.135577][ T8427] Reported by Kernel Concurrency Sanitizer on: [ 33.141697][ T8427] CPU: 1 PID: 8427 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0 [ 33.150017][ T8427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.160051][ T8427] ================================================================== [ 33.168228][ T8427] Kernel panic - not syncing: panic_on_warn set ... [ 33.174792][ T8427] CPU: 1 PID: 8427 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0 [ 33.183096][ T8427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.193306][ T8427] Call Trace: [ 33.196569][ T8427] dump_stack+0x116/0x15d [ 33.200881][ T8427] panic+0x1e7/0x5fa [ 33.204826][ T8427] ? vprintk_emit+0x2e2/0x360 [ 33.209487][ T8427] kcsan_report+0x67b/0x680 [ 33.213983][ T8427] ? kcsan_setup_watchpoint+0x47b/0x4e0 [ 33.219507][ T8427] ? atime_needs_update+0x133/0x370 [ 33.224683][ T8427] ? touch_atime+0x55/0x2d0 [ 33.229165][ T8427] ? generic_file_buffered_read+0x92b/0x9a0 [ 33.235046][ T8427] ? generic_file_read_iter+0x80/0x3d0 [ 33.240512][ T8427] ? ext4_file_read_iter+0x2d0/0x420 [ 33.245993][ T8427] ? __kernel_read+0x307/0x560 [ 33.250788][ T8427] ? integrity_kernel_read+0x4c/0x70 [ 33.256075][ T8427] ? ima_calc_file_hash+0x956/0x1390 [ 33.261488][ T8427] ? ima_collect_measurement+0x168/0x300 [ 33.267127][ T8427] ? process_measurement+0x9f1/0x1050 [ 33.272499][ T8427] ? ima_file_check+0x72/0xa0 [ 33.277250][ T8427] ? path_openat+0x1887/0x20a0 [ 33.282095][ T8427] ? do_filp_open+0xbd/0x1d0 [ 33.286665][ T8427] ? do_sys_openat2+0xa3/0x240 [ 33.291426][ T8427] ? __x64_sys_openat+0xef/0x110 [ 33.296356][ T8427] ? do_syscall_64+0x39/0x80 [ 33.300940][ T8427] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.306994][ T8427] kcsan_setup_watchpoint+0x47b/0x4e0 [ 33.312375][ T8427] ? __check_object_size+0x253/0x310 [ 33.317643][ T8427] atime_needs_update+0x133/0x370 [ 33.322789][ T8427] touch_atime+0x55/0x2d0 [ 33.327113][ T8427] generic_file_buffered_read+0x92b/0x9a0 [ 33.332942][ T8427] generic_file_read_iter+0x80/0x3d0 [ 33.338335][ T8427] ext4_file_read_iter+0x2d0/0x420 [ 33.343439][ T8427] __kernel_read+0x307/0x560 [ 33.348043][ T8427] integrity_kernel_read+0x4c/0x70 [ 33.353141][ T8427] ima_calc_file_hash+0x956/0x1390 [ 33.358241][ T8427] ? copy_fpregs_to_fpstate+0xd8/0x110 [ 33.363711][ T8427] ? __switch_to+0x14e/0x4c0 [ 33.368282][ T8427] ? __schedule+0x3c1/0x580 [ 33.372765][ T8427] ? widen_string+0x3a/0x280 [ 33.377352][ T8427] ? format_decode+0x1d3/0x840 [ 33.382094][ T8427] ? string+0x1f9/0x210 [ 33.386230][ T8427] ? __down_read_common+0x14e/0x510 [ 33.391579][ T8427] ? ext4_xattr_ibody_get+0x68/0x630 [ 33.396860][ T8427] ? aa_get_newest_label+0x74/0x250 [ 33.402053][ T8427] ? apparmor_capable+0xfe/0x160 [ 33.407072][ T8427] ? ext4_xattr_get+0x27d/0x580 [ 33.411904][ T8427] ? ima_match_policy+0xa80/0xab0 [ 33.416920][ T8427] ima_collect_measurement+0x168/0x300 [ 33.422357][ T8427] process_measurement+0x9f1/0x1050 [ 33.429638][ T8427] ? dquot_file_open+0x68/0x80 [ 33.434394][ T8427] ? ext4_file_open+0x186/0x560 [ 33.439235][ T8427] ? aa_get_newest_label+0x74/0x250 [ 33.444426][ T8427] ? __rcu_read_unlock+0x51/0x250 [ 33.449432][ T8427] ? fsnotify_perm+0x296/0x2d0 [ 33.454175][ T8427] ? aa_get_task_label+0x72/0xc0 [ 33.459091][ T8427] ? apparmor_task_getsecid+0x81/0xa0 [ 33.464455][ T8427] ima_file_check+0x72/0xa0 [ 33.468940][ T8427] path_openat+0x1887/0x20a0 [ 33.473510][ T8427] ? up_write+0x25/0xc0 [ 33.477648][ T8427] do_filp_open+0xbd/0x1d0 [ 33.482041][ T8427] ? _raw_spin_unlock+0x22/0x40 [ 33.486906][ T8427] ? alloc_fd+0x35d/0x3b0 [ 33.491235][ T8427] do_sys_openat2+0xa3/0x240 [ 33.495826][ T8427] __x64_sys_openat+0xef/0x110 [ 33.500657][ T8427] do_syscall_64+0x39/0x80 [ 33.505055][ T8427] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.510926][ T8427] RIP: 0033:0x4b105a [ 33.514802][ T8427] Code: e8 fb c2 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 [ 33.534973][ T8427] RSP: 002b:000000c0004ed798 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 33.543378][ T8427] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004b105a [ 33.551334][ T8427] RDX: 0000000000080002 RSI: 000000c000092600 RDI: ffffffffffffff9c [ 33.559287][ T8427] RBP: 000000c0004ed810 R08: 0000000000000000 R09: 0000000000000000 [ 33.567238][ T8427] R10: 00000000000001a4 R11: 0000000000000216 R12: ffffffffffffffff [ 33.575202][ T8427] R13: 0000000000000031 R14: 0000000000000030 R15: 0000000000000100 [ 33.583631][ T8427] Kernel Offset: disabled [ 33.587949][ T8427] Rebooting in 86400 seconds..