Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.78' (ECDSA) to the list of known hosts. syzkaller login: [ 32.561037] IPVS: ftp: loaded support on port[0] = 21 [ 32.562955] IPVS: ftp: loaded support on port[0] = 21 [ 32.576770] IPVS: ftp: loaded support on port[0] = 21 [ 32.581340] IPVS: ftp: loaded support on port[0] = 21 [ 32.590668] IPVS: ftp: loaded support on port[0] = 21 [ 32.601282] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 32.824038] audit: type=1800 audit(1658004751.513:2): pid=8259 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor225" name="bus" dev="sda1" ino=13860 res=0 [ 32.850272] audit: type=1800 audit(1658004751.513:3): pid=8260 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor225" name="bus" dev="sda1" ino=13860 res=0 [ 32.902731] audit: type=1804 audit(1658004751.593:4): pid=8272 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 32.924980] audit: type=1804 audit(1658004751.623:5): pid=8273 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 32.947020] audit: type=1804 audit(1658004751.623:6): pid=8273 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 32.968247] audit: type=1804 audit(1658004751.623:7): pid=8272 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 32.989679] audit: type=1804 audit(1658004751.643:8): pid=8272 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 33.010298] audit: type=1804 audit(1658004751.693:9): pid=8273 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 [ 33.030245] audit: type=1804 audit(1658004751.713:10): pid=8275 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 executing program executing program [ 33.050213] audit: type=1804 audit(1658004751.713:11): pid=8274 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor225" name="/root/bus" dev="sda1" ino=13860 res=1 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 [ 33.687473] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 33.699232] File: /root/bus PID: 8349 Comm: syz-executor225 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 [ 34.545372] WARNING: CPU: 1 PID: 8456 at fs/ext4/inode.c:3942 ext4_set_page_dirty+0x2a4/0x370 [ 34.554314] Kernel panic - not syncing: panic_on_warn set ... [ 34.554314] [ 34.561665] CPU: 1 PID: 8456 Comm: syz-executor225 Not tainted 4.19.211-syzkaller #0 [ 34.569529] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 34.578865] Call Trace: [ 34.581448] dump_stack+0x1fc/0x2ef [ 34.585063] panic+0x26a/0x50e [ 34.588246] ? __warn_printk+0xf3/0xf3 [ 34.592122] ? ext4_set_page_dirty+0x2a4/0x370 [ 34.596690] ? __probe_kernel_read+0x130/0x1b0 [ 34.601256] ? __warn.cold+0x5/0x5a [ 34.604866] ? __warn+0xe4/0x200 [ 34.608222] ? ext4_set_page_dirty+0x2a4/0x370 [ 34.612793] __warn.cold+0x20/0x5a [ 34.616320] ? ext4_set_page_dirty+0x2a4/0x370 [ 34.620887] report_bug+0x262/0x2b0 [ 34.624499] do_error_trap+0x1d7/0x310 [ 34.628375] ? math_error+0x310/0x310 [ 34.632157] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.636898] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.641466] ? error_entry+0x72/0xd0 [ 34.645164] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.650181] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.655019] invalid_op+0x14/0x20 [ 34.658475] RIP: 0010:ext4_set_page_dirty+0x2a4/0x370 [ 34.663659] 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 [ 34.682543] RSP: 0018:ffff8880931ffa28 EFLAGS: 00010293 [ 34.687890] RAX: ffff8880aacb4040 RBX: 0000000000000000 RCX: ffffffff81de75ce [ 34.695144] RDX: 0000000000000000 RSI: ffffffff81de7654 RDI: 0000000000000001 [ 34.702397] RBP: ffffea0002299740 R08: 0000000000000001 R09: 0000000000000000 [ 34.709646] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 34.716898] R13: ffffea0002428288 R14: ffffea0002428288 R15: dffffc0000000000 [ 34.724162] ? ext4_set_page_dirty+0x21e/0x370 [ 34.728733] ? ext4_set_page_dirty+0x2a4/0x370 [ 34.733310] ? ext4_set_page_dirty+0x2a4/0x370 [ 34.737878] ? ext4_readpages+0x110/0x110 [ 34.742098] set_page_dirty+0x25f/0x640 [ 34.746058] set_page_dirty_lock+0x81/0xc0 [ 34.750281] process_vm_rw_core.constprop.0+0x4bb/0xb00 [ 34.755639] ? pcpu_free_vm_areas+0xc0/0xc0 [ 34.759973] ? __might_fault+0x192/0x1d0 [ 34.764026] ? _copy_from_user+0xd2/0x130 [ 34.768160] ? rw_copy_check_uvector+0x27c/0x340 [ 34.772908] process_vm_rw+0x21a/0x250 [ 34.776783] ? compat_process_vm_rw+0x250/0x250 [ 34.781450] ? vm_insert_page+0x9c0/0x9c0 [ 34.785590] ? __do_page_fault+0x6d1/0xd60 [ 34.789813] ? lock_downgrade+0x720/0x720 [ 34.793949] ? up_read+0x17/0x110 [ 34.797401] ? __do_page_fault+0x180/0xd60 [ 34.801626] __x64_sys_process_vm_writev+0xdf/0x1b0 [ 34.806628] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.811193] do_syscall_64+0xf9/0x620 [ 34.814982] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.820158] RIP: 0033:0x7fa238706d79 [ 34.823856] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 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 [ 34.842739] RSP: 002b:00007fa2386752e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 [ 34.850431] RAX: ffffffffffffffda RBX: 00007fa238790508 RCX: 00007fa238706d79 [ 34.857681] RDX: 0000000000000001 RSI: 0000000020c22000 RDI: 0000000000000022 [ 34.864932] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 34.872270] R10: 0000000020c22fa0 R11: 0000000000000246 R12: 00007fa238790500 [ 34.879523] R13: 00007fa23879050c R14: 00007fa23875d2c4 R15: 0000000000000022 [ 34.887096] Kernel Offset: disabled [ 34.890752] Rebooting in 86400 seconds..