[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.239' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.963413] audit: type=1800 audit(1664754055.547:2): pid=7990 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor152" name="bus" dev="sda1" ino=13861 res=0 [ 27.982458] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 27.984420] audit: type=1804 audit(1664754055.547:3): pid=7990 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 executing program [ 28.002908] File: /root/bus PID: 7990 Comm: syz-executor152 [ 28.013777] audit: type=1804 audit(1664754055.547:4): pid=7990 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.036976] audit: type=1804 audit(1664754055.547:5): pid=7991 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.056335] audit: type=1804 audit(1664754055.547:6): pid=7990 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.061287] ------------[ cut here ]------------ [ 28.075822] audit: type=1804 audit(1664754055.617:7): pid=7993 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.078881] WARNING: CPU: 0 PID: 7994 at fs/ext4/inode.c:3924 ext4_set_page_dirty+0xe8/0x130 [ 28.099361] audit: type=1804 audit(1664754055.617:8): pid=7993 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.105706] Kernel panic - not syncing: panic_on_warn set ... [ 28.105706] [ 28.105714] CPU: 0 PID: 7994 Comm: syz-executor152 Not tainted 4.14.295-syzkaller #0 [ 28.105717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.105720] Call Trace: [ 28.105734] dump_stack+0x1b2/0x281 [ 28.105745] panic+0x1f9/0x42d [ 28.105751] ? add_taint.cold+0x16/0x16 [ 28.105762] ? ext4_set_page_dirty+0xe8/0x130 [ 28.105775] ? ext4_set_page_dirty+0xe8/0x130 [ 28.129123] audit: type=1804 audit(1664754055.617:9): pid=7994 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.130887] __warn.cold+0x20/0x44 [ 28.140281] audit: type=1804 audit(1664754055.617:10): pid=7993 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor152" name="/root/bus" dev="sda1" ino=13861 res=1 [ 28.148117] ? ist_end_non_atomic+0x10/0x10 [ 28.148127] ? ext4_set_page_dirty+0xe8/0x130 [ 28.148135] report_bug+0x208/0x250 [ 28.148144] do_error_trap+0x195/0x2d0 [ 28.148152] ? math_error+0x2d0/0x2d0 [ 28.148160] ? follow_page_mask+0xa6/0x18a0 [ 28.148172] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.148184] invalid_op+0x1b/0x40 [ 28.148192] RIP: 0010:ext4_set_page_dirty+0xe8/0x130 [ 28.148196] RSP: 0018:ffff888095857a58 EFLAGS: 00010297 [ 28.252539] RAX: ffff8880b3688580 RBX: ffffea00022e5300 RCX: 0000000000000001 [ 28.259790] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffea00022e5320 [ 28.267038] RBP: ffffea00022e5300 R08: 0000000000000001 R09: ffffed10117299ff [ 28.274289] R10: ffff88808b94cfff R11: 0000000000000000 R12: ffffea00022e5360 [ 28.281538] R13: ffffea00022e5360 R14: dffffc0000000000 R15: ffffea00022e5300 [ 28.288802] ? ext4_set_page_dirty+0xe8/0x130 [ 28.293274] ? ext4_readpages+0x100/0x100 [ 28.297404] set_page_dirty+0x148/0x2a0 [ 28.301358] set_page_dirty_lock+0x61/0xa0 [ 28.305572] process_vm_rw_core.constprop.0+0x4a1/0xa40 [ 28.310926] ? pcpu_free_vm_areas+0xb0/0xb0 [ 28.315228] ? __might_fault+0x177/0x1b0 [ 28.319269] ? _copy_from_user+0x96/0x100 [ 28.323401] ? rw_copy_check_uvector+0x1dd/0x2b0 [ 28.328139] ? dup_iter+0x240/0x240 [ 28.331745] process_vm_rw+0x1c2/0x1f0 [ 28.335614] ? compat_process_vm_rw+0x1f0/0x1f0 [ 28.340288] ? vm_insert_page+0x7c0/0x7c0 [ 28.344423] ? __fd_install+0x227/0x5c0 [ 28.348388] ? __do_page_fault+0x571/0xad0 [ 28.352607] ? lock_downgrade+0x740/0x740 [ 28.356746] SyS_process_vm_writev+0x39/0x50 [ 28.361136] ? SyS_process_vm_readv+0x50/0x50 [ 28.365609] do_syscall_64+0x1d5/0x640 [ 28.369479] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.374647] RIP: 0033:0x7f50f7c58a79 [ 28.378334] RSP: 002b:00007f50f7be9308 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 [ 28.386022] RAX: ffffffffffffffda RBX: 00007f50f7ce0438 RCX: 00007f50f7c58a79 [ 28.393267] RDX: 0000000000000001 RSI: 0000000020c22000 RDI: 0000000000001f3a [ 28.400514] RBP: 00007f50f7ce0430 R08: 0000000000000001 R09: 0000000000000000 [ 28.407761] R10: 0000000020c22fa0 R11: 0000000000000246 R12: 00007f50f7cae074 [ 28.415009] R13: 00007ffd6d2d112f R14: 00007f50f7be9400 R15: 0000000000022000 [ 28.422563] Kernel Offset: disabled [ 28.426212] Rebooting in 86400 seconds..