[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.60' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 26.937515] audit: type=1800 audit(1658030362.961:2): pid=7956 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor534" name="bus" dev="sda1" ino=13862 res=0 [ 26.958436] audit: type=1800 audit(1658030362.961:3): pid=7961 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor534" name="bus" dev="sda1" ino=13862 res=0 [ 26.977274] audit: type=1800 audit(1658030362.961:4): pid=7962 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor534" name="bus" dev="sda1" ino=13862 res=0 [ 27.004035] audit: type=1804 audit(1658030363.021:5): pid=7969 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 [ 27.022962] audit: type=1804 audit(1658030363.021:6): pid=7968 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 [ 27.044107] audit: type=1804 audit(1658030363.051:7): pid=7973 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 [ 27.065896] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! executing program executing program executing program executing program [ 27.078124] audit: type=1804 audit(1658030363.051:8): pid=7973 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 [ 27.084681] File: /root/bus PID: 7972 Comm: syz-executor534 [ 27.098283] audit: type=1804 audit(1658030363.051:9): pid=7973 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 executing program executing program [ 27.123530] audit: type=1804 audit(1658030363.071:10): pid=7969 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 [ 27.142032] audit: type=1804 audit(1658030363.071:11): pid=7970 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor534" name="/root/bus" dev="sda1" ino=13862 res=1 executing program executing program [ 27.256330] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 27.267558] File: /root/bus PID: 7995 Comm: syz-executor534 [ 27.286411] ------------[ cut here ]------------ [ 27.291193] WARNING: CPU: 1 PID: 7998 at fs/ext4/inode.c:3917 ext4_set_page_dirty+0xe8/0x130 [ 27.300000] Kernel panic - not syncing: panic_on_warn set ... [ 27.300000] [ 27.307345] CPU: 1 PID: 7998 Comm: syz-executor534 Not tainted 4.14.288-syzkaller #0 [ 27.315203] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 27.324567] Call Trace: [ 27.327146] dump_stack+0x1b2/0x281 [ 27.330768] panic+0x1f9/0x42d [ 27.333950] ? add_taint.cold+0x16/0x16 [ 27.337915] ? ext4_set_page_dirty+0xe8/0x130 [ 27.342429] ? ext4_set_page_dirty+0xe8/0x130 [ 27.346905] __warn.cold+0x20/0x44 [ 27.350426] ? ist_end_non_atomic+0x10/0x10 [ 27.355074] ? ext4_set_page_dirty+0xe8/0x130 [ 27.359742] report_bug+0x208/0x250 [ 27.363346] do_error_trap+0x195/0x2d0 [ 27.367210] ? math_error+0x2d0/0x2d0 [ 27.370990] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.375728] ? cmp_ex_sort+0xb0/0xb0 [ 27.379426] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.384248] invalid_op+0x1b/0x40 [ 27.387700] RIP: 0010:ext4_set_page_dirty+0xe8/0x130 [ 27.392797] RSP: 0018:ffff888096ad7a58 EFLAGS: 00010297 [ 27.398140] RAX: ffff8880b2910080 RBX: ffffea000232da40 RCX: 0000000000000001 [ 27.405402] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffea000232da60 [ 27.412655] RBP: ffffea000232da40 R08: 0000000000000001 R09: ffffed101196d3ff [ 27.419905] R10: ffff88808cb69fff R11: 0000000000000000 R12: ffff8880b5d7e920 [ 27.427166] R13: ffff8880b5d7e920 R14: dffffc0000000000 R15: ffffea000232da40 [ 27.434439] ? ext4_set_page_dirty+0xe8/0x130 [ 27.438912] ? ext4_readpages+0x100/0x100 [ 27.443053] set_page_dirty+0x148/0x2a0 [ 27.447016] set_page_dirty_lock+0x61/0xa0 [ 27.451250] process_vm_rw_core.constprop.0+0x4a1/0xa40 [ 27.456597] ? pcpu_free_vm_areas+0xb0/0xb0 [ 27.460997] ? __might_fault+0x177/0x1b0 [ 27.465122] ? _copy_from_user+0x96/0x100 [ 27.469256] ? rw_copy_check_uvector+0x1dd/0x2b0 [ 27.473989] ? dup_iter+0x240/0x240 [ 27.477596] process_vm_rw+0x1c2/0x1f0 [ 27.481459] ? compat_process_vm_rw+0x1f0/0x1f0 [ 27.486126] ? vm_insert_page+0x7c0/0x7c0 [ 27.490265] ? __fd_install+0x227/0x5c0 [ 27.494233] ? __do_page_fault+0x571/0xad0 [ 27.498487] ? lock_downgrade+0x740/0x740 [ 27.502618] SyS_process_vm_writev+0x39/0x50 [ 27.507016] ? SyS_process_vm_readv+0x50/0x50 [ 27.511502] do_syscall_64+0x1d5/0x640 [ 27.515376] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.520541] RIP: 0033:0x7fae53634b89 [ 27.524225] RSP: 002b:00007fae535c52f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 [ 27.531905] RAX: ffffffffffffffda RBX: 00007fae536bd438 RCX: 00007fae53634b89 [ 27.539153] RDX: 0000000000000001 RSI: 0000000020c22000 RDI: 0000000000001f3e [ 27.546405] RBP: 00007fae536bd430 R08: 0000000000000001 R09: 0000000000000000 [ 27.553660] R10: 0000000020c22fa0 R11: 0000000000000246 R12: 00007fae536bd43c [ 27.560915] R13: 00007fae5368b07c R14: 0000000000000000 R15: 0000000000022000 [ 27.568495] Kernel Offset: disabled [ 27.572150] Rebooting in 86400 seconds..