[?25l[?1c7[ ok 8[?25h[?0c. [ 40.538943][ T26] audit: type=1800 audit(1572514995.100:25): pid=7106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 40.566057][ T26] audit: type=1800 audit(1572514995.100:26): pid=7106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 40.595203][ T26] audit: type=1800 audit(1572514995.100:27): pid=7106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.215' (ECDSA) to the list of known hosts. 2019/10/31 09:43:23 fuzzer started 2019/10/31 09:43:25 dialing manager at 10.128.0.105:37477 2019/10/31 09:43:25 syscalls: 2540 2019/10/31 09:43:25 code coverage: enabled 2019/10/31 09:43:25 comparison tracing: enabled 2019/10/31 09:43:25 extra coverage: extra coverage is not supported by the kernel 2019/10/31 09:43:25 setuid sandbox: enabled 2019/10/31 09:43:25 namespace sandbox: enabled 2019/10/31 09:43:25 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/31 09:43:25 fault injection: enabled 2019/10/31 09:43:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/31 09:43:25 net packet injection: enabled 2019/10/31 09:43:25 net device setup: enabled 2019/10/31 09:43:25 concurrency sanitizer: enabled syzkaller login: [ 51.173554][ T7275] ================================================================== [ 51.183437][ T7275] BUG: KCSAN: data-race in pipe_wait / put_pipe_info [ 51.190099][ T7275] [ 51.192417][ T7275] read to 0xffff888120ea81cc of 4 bytes by task 7263 on cpu 1: [ 51.199945][ T7275] pipe_wait+0xd7/0x140 [ 51.204098][ T7275] pipe_read+0x3b1/0x5e0 [ 51.208340][ T7275] new_sync_read+0x389/0x4f0 [ 51.213260][ T7275] __vfs_read+0xb1/0xc0 [ 51.217424][ T7275] vfs_read+0x143/0x2c0 [ 51.221657][ T7275] ksys_read+0xd5/0x1b0 [ 51.225827][ T7275] __x64_sys_read+0x4c/0x60 [ 51.230340][ T7275] do_syscall_64+0xcc/0x370 [ 51.234837][ T7275] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.240794][ T7275] [ 51.243198][ T7275] write to 0xffff888120ea81cc of 4 bytes by task 7275 on cpu 0: [ 51.250838][ T7275] put_pipe_info+0x4d/0xb0 [ 51.255244][ T7275] pipe_release+0x152/0x1b0 [ 51.259994][ T7275] __fput+0x1e1/0x520 [ 51.263959][ T7275] ____fput+0x1f/0x30 [ 51.267925][ T7275] task_work_run+0xf6/0x130 [ 51.275043][ T7275] exit_to_usermode_loop+0x2b4/0x2c0 [ 51.280331][ T7275] do_syscall_64+0x353/0x370 [ 51.284914][ T7275] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.290795][ T7275] [ 51.293105][ T7275] Reported by Kernel Concurrency Sanitizer on: [ 51.299253][ T7275] CPU: 0 PID: 7275 Comm: syz-executor Not tainted 5.4.0-rc3+ #0 [ 51.307133][ T7275] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.317183][ T7275] ================================================================== [ 51.325250][ T7275] Kernel panic - not syncing: panic_on_warn set ... [ 51.331825][ T7275] CPU: 0 PID: 7275 Comm: syz-executor Not tainted 5.4.0-rc3+ #0 [ 51.339439][ T7275] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.351333][ T7275] Call Trace: [ 51.354639][ T7275] dump_stack+0xf5/0x159 [ 51.358871][ T7275] panic+0x210/0x640 [ 51.378476][ T7275] ? vprintk_func+0x8d/0x140 [ 51.383057][ T7275] kcsan_report.cold+0xc/0x10 [ 51.387719][ T7275] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 51.393252][ T7275] __tsan_write4+0x32/0x40 [ 51.397665][ T7275] put_pipe_info+0x4d/0xb0 [ 51.403412][ T7275] pipe_release+0x152/0x1b0 [ 51.407936][ T7275] __fput+0x1e1/0x520 [ 51.411911][ T7275] ? put_pipe_info+0xb0/0xb0 [ 51.416495][ T7275] ____fput+0x1f/0x30 [ 51.420476][ T7275] task_work_run+0xf6/0x130 [ 51.425093][ T7275] exit_to_usermode_loop+0x2b4/0x2c0 [ 51.430379][ T7275] do_syscall_64+0x353/0x370 [ 51.434958][ T7275] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.440841][ T7275] RIP: 0033:0x401920 [ 51.445799][ T7275] Code: Bad RIP value. [ 51.449846][ T7275] RSP: 002b:00007ffd5f2a7b70 EFLAGS: 00000200 ORIG_RAX: 000000000000003b [ 51.458239][ T7275] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 51.466282][ T7275] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 51.474689][ T7275] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 51.482742][ T7275] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 51.490697][ T7275] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.500180][ T7275] Kernel Offset: disabled [ 51.505284][ T7275] Rebooting in 86400 seconds..