[ 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 '10.128.0.249' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 79.947806] audit: type=1800 audit(1644000361.017:2): pid=8140 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 79.983588] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 79.994879] File: /root/bus PID: 8140 Comm: syz-executor164 [ 80.016528] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! executing program executing program [ 80.052784] File: /root/bus PID: 8150 Comm: syz-executor164 executing program executing program executing program executing program executing program executing program executing program executing program [ 80.192615] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 80.216047] File: /root/bus PID: 8170 Comm: syz-executor164 executing program executing program [ 80.255914] audit: type=1800 audit(1644000361.327:3): pid=8180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.275546] audit: type=1800 audit(1644000361.327:4): pid=8186 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.295481] audit: type=1800 audit(1644000361.327:5): pid=8187 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.505647] audit: type=1800 audit(1644000361.577:6): pid=8186 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.524694] audit: type=1800 audit(1644000361.577:7): pid=8181 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.544961] audit: type=1800 audit(1644000361.577:8): pid=8184 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.565151] audit: type=1800 audit(1644000361.577:9): pid=8187 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 [ 80.584520] audit: type=1800 audit(1644000361.577:10): pid=8185 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 executing program executing program executing program executing program executing program executing program [ 80.631167] audit: type=1800 audit(1644000361.697:11): pid=8180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor164" name="bus" dev="sda1" ino=13840 res=0 executing program executing program executing program executing program executing program executing program [ 80.932931] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 80.944310] File: /root/bus PID: 8244 Comm: syz-executor164 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 81.289554] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.302833] File: /root/bus PID: 8274 Comm: syz-executor164 executing program executing program executing program [ 81.330570] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.342296] File: /root/bus PID: 8285 Comm: syz-executor164 executing program executing program [ 81.377743] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.410481] File: /root/bus PID: 8293 Comm: syz-executor164 executing program executing program executing program [ 81.440531] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.459200] File: /root/bus PID: 8299 Comm: syz-executor164 executing program executing program executing program [ 81.484084] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.506880] File: /root/bus PID: 8307 Comm: syz-executor164 executing program executing program [ 81.524104] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 81.548411] File: /root/bus PID: 8313 Comm: syz-executor164 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 84.178041] WARNING: CPU: 1 PID: 8601 at fs/ext4/inode.c:3942 ext4_set_page_dirty+0x2a4/0x370 [ 84.186843] Kernel panic - not syncing: panic_on_warn set ... [ 84.186843] [ 84.194214] CPU: 1 PID: 8601 Comm: syz-executor164 Not tainted 4.19.211-syzkaller #0 [ 84.202085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.211512] Call Trace: [ 84.214102] dump_stack+0x1fc/0x2ef [ 84.217737] panic+0x26a/0x50e [ 84.220921] ? __warn_printk+0xf3/0xf3 [ 84.224807] ? ext4_set_page_dirty+0x2a4/0x370 [ 84.229383] ? __probe_kernel_read+0x130/0x1b0 [ 84.233954] ? __warn.cold+0x5/0x5a [ 84.237570] ? __warn+0xe4/0x200 [ 84.240928] ? ext4_set_page_dirty+0x2a4/0x370 [ 84.245510] __warn.cold+0x20/0x5a [ 84.249046] ? ext4_set_page_dirty+0x2a4/0x370 [ 84.253633] report_bug+0x262/0x2b0 [ 84.257256] do_error_trap+0x1d7/0x310 [ 84.261136] ? math_error+0x310/0x310 [ 84.264931] ? mark_held_locks+0xf0/0xf0 [ 84.269012] ? follow_page_mask+0xc3/0x1d00 [ 84.273327] ? error_entry+0x72/0xd0 [ 84.277032] ? trace_hardirqs_off_caller+0x6e/0x210 [ 84.282042] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 84.286892] invalid_op+0x14/0x20 [ 84.290342] RIP: 0010:ext4_set_page_dirty+0x2a4/0x370 [ 84.295525] Code: ff e8 40 0f 84 ff 49 8d 5d ff e9 27 fe ff ff e8 32 0f 84 ff 48 c7 c6 e0 54 7a 88 48 89 ef e8 e3 a0 ab ff 0f 0b e8 1c 0f 84 ff <0f> 0b e9 77 ff ff ff e8 10 0f 84 ff 4c 8b 65 08 31 ff 4c 89 e3 83 [ 84.314427] RSP: 0018:ffff8880ade67a28 EFLAGS: 00010293 [ 84.319802] RAX: ffff8880949a4100 RBX: 0000000000000000 RCX: ffffffff81de75ce [ 84.327062] RDX: 0000000000000000 RSI: ffffffff81de7654 RDI: 0000000000000001 [ 84.334319] RBP: ffffea00021b5880 R08: 0000000000000001 R09: 0000000000000000 [ 84.341577] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 84.348952] R13: ffffea00021dd5c8 R14: ffffea00021dd5c8 R15: dffffc0000000000 [ 84.356248] ? ext4_set_page_dirty+0x21e/0x370 [ 84.360824] ? ext4_set_page_dirty+0x2a4/0x370 [ 84.365414] ? ext4_set_page_dirty+0x2a4/0x370 [ 84.369988] ? ext4_readpages+0x110/0x110 [ 84.374255] set_page_dirty+0x25f/0x640 [ 84.378232] set_page_dirty_lock+0x81/0xc0 [ 84.382458] process_vm_rw_core.constprop.0+0x4bb/0xb00 [ 84.387821] ? pcpu_free_vm_areas+0xc0/0xc0 [ 84.392135] ? __might_fault+0x192/0x1d0 [ 84.396188] ? _copy_from_user+0xd2/0x130 [ 84.400331] ? rw_copy_check_uvector+0x27c/0x340 [ 84.405099] process_vm_rw+0x21a/0x250 [ 84.408979] ? compat_process_vm_rw+0x250/0x250 [ 84.413648] ? vm_insert_page+0x9c0/0x9c0 [ 84.417793] ? __do_page_fault+0x6d1/0xd60 [ 84.422021] ? lock_downgrade+0x720/0x720 [ 84.426163] ? up_read+0x17/0x110 [ 84.429606] ? __do_page_fault+0x180/0xd60 [ 84.433837] __x64_sys_process_vm_writev+0xdf/0x1b0 [ 84.438849] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 84.443425] do_syscall_64+0xf9/0x620 [ 84.447228] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.452458] RIP: 0033:0x7ff8acf52b29 [ 84.456165] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 84.475059] RSP: 002b:00007ff8acee32f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 [ 84.482763] RAX: ffffffffffffffda RBX: 00007ff8acfda438 RCX: 00007ff8acf52b29 [ 84.490026] RDX: 0000000000000001 RSI: 0000000020c22000 RDI: 0000000000002199 [ 84.497288] RBP: 00007ff8acfda430 R08: 0000000000000001 R09: 0000000000000000 [ 84.504550] R10: 0000000020c22fa0 R11: 0000000000000246 R12: 00007ff8acfda43c [ 84.511811] R13: 00007ff8acfa8074 R14: 65732f636f72702f R15: 0000000000022000 [ 84.519394] Kernel Offset: disabled [ 84.523052] Rebooting in 86400 seconds..