[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.52' (ECDSA) to the list of known hosts. syzkaller login: [ 293.374762][T10445] BUG: unable to handle page fault for address: ffffe8ffffc33c70 [ 293.382473][T10445] #PF: supervisor write access in kernel mode [ 293.388508][T10445] #PF: error_code(0x0002) - not-present page [ 293.394466][T10445] PGD 77000000000000 P4D 77000000000000 [ 293.400093][T10445] Oops: 0002 [#1] PREEMPT SMP KASAN [ 293.405293][T10445] CPU: 0 PID: 10445 Comm: syz-executor899 Not tainted 5.9.0-rc3-syzkaller #0 [ 293.414015][T10445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 293.424049][T10445] RIP: 0010:__sb_start_write+0x16e/0x470 [ 293.429651][T10445] Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 02 00 00 41 bd 01 00 00 00 bd 01 00 00 00 48 8b 43 68 <65> ff 00 e8 aa 6b b4 ff bf 01 00 00 00 e8 e0 d5 8f ff 31 ff 65 44 [ 293.449398][T10445] RSP: 0018:ffffc9000a0bfab8 EFLAGS: 00010246 [ 293.455434][T10445] RAX: 0000607f51633c70 RBX: ffff888098be2380 RCX: ffffffff81bfdf07 [ 293.463377][T10445] RDX: 1ffff1101317c47d RSI: 0000000000000001 RDI: ffff888098be23e8 [ 293.471331][T10445] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 [ 293.479273][T10445] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 293.487227][T10445] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880854bc0b0 [ 293.495184][T10445] FS: 00007fa632ef6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 293.504095][T10445] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 293.510661][T10445] CR2: ffffe8ffffc33c70 CR3: 000000000011b000 CR4: 00000000001506f0 [ 293.518619][T10445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 293.526570][T10445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 293.534539][T10445] Call Trace: [ 293.537818][T10445] touch_atime+0x152/0x370 [ 293.542207][T10445] ? atime_needs_update+0x5f0/0x5f0 [ 293.547379][T10445] splice_direct_to_actor+0x762/0x980 [ 293.552725][T10445] ? generic_splice_sendpage+0x140/0x140 [ 293.558328][T10445] ? do_splice_to+0x170/0x170 [ 293.562989][T10445] ? security_file_permission+0x248/0x560 [ 293.568682][T10445] do_splice_direct+0x1b3/0x280 [ 293.573603][T10445] ? splice_direct_to_actor+0x980/0x980 [ 293.579122][T10445] ? security_file_permission+0x248/0x560 [ 293.584827][T10445] do_sendfile+0x55f/0xd40 [ 293.589218][T10445] ? do_compat_pwritev64+0x1b0/0x1b0 [ 293.594479][T10445] __x64_sys_sendfile64+0x1cc/0x210 [ 293.599650][T10445] ? __ia32_sys_sendfile+0x220/0x220 [ 293.604979][T10445] ? check_preemption_disabled+0x50/0x130 [ 293.610672][T10445] ? syscall_enter_from_user_mode+0x20/0x290 [ 293.616623][T10445] ? lockdep_hardirqs_on+0x53/0x100 [ 293.621793][T10445] do_syscall_64+0x2d/0x70 [ 293.626230][T10445] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 293.632098][T10445] RIP: 0033:0x446ac9 [ 293.635974][T10445] Code: Bad RIP value. [ 293.640010][T10445] RSP: 002b:00007fa632ef5d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 293.648414][T10445] RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 0000000000446ac9 [ 293.656363][T10445] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 293.664306][T10445] RBP: 00000000006dbc50 R08: 65732f636f72702f R09: 65732f636f72702f [ 293.672256][T10445] R10: 0800000080004101 R11: 0000000000000246 R12: 00000000006dbc5c [ 293.680204][T10445] R13: 00007fa632ef5d20 R14: 00007fa632ef5d20 R15: 20c49ba5e353f7cf [ 293.688159][T10445] Modules linked in: [ 293.692026][T10445] CR2: ffffe8ffffc33c70 [ 293.696198][T10445] ---[ end trace 641e2e487fb96738 ]--- [ 293.701715][T10445] RIP: 0010:__sb_start_write+0x16e/0x470 [ 293.707383][T10445] Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 02 00 00 41 bd 01 00 00 00 bd 01 00 00 00 48 8b 43 68 <65> ff 00 e8 aa 6b b4 ff bf 01 00 00 00 e8 e0 d5 8f ff 31 ff 65 44 [ 293.726972][T10445] RSP: 0018:ffffc9000a0bfab8 EFLAGS: 00010246 [ 293.733012][T10445] RAX: 0000607f51633c70 RBX: ffff888098be2380 RCX: ffffffff81bfdf07 [ 293.740956][T10445] RDX: 1ffff1101317c47d RSI: 0000000000000001 RDI: ffff888098be23e8 [ 293.748899][T10445] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 [ 293.756868][T10445] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 293.764819][T10445] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880854bc0b0 [ 293.772777][T10445] FS: 00007fa632ef6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 293.781674][T10445] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 293.788242][T10445] CR2: 0000000000446a9f CR3: 000000000011b000 CR4: 00000000001506f0 [ 293.796200][T10445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 293.804153][T10445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 293.812098][T10445] Kernel panic - not syncing: Fatal exception [ 293.819208][T10445] Kernel Offset: disabled [ 293.823517][T10445] Rebooting in 86400 seconds..