[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.710655][ T26] audit: type=1800 audit(1548846929.108:25): pid=7834 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.749359][ T26] audit: type=1800 audit(1548846929.108:26): pid=7834 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.784729][ T26] audit: type=1800 audit(1548846929.108:27): pid=7834 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.494354][ T7985] BUG: unable to handle kernel paging request at ffffffffffffffea [ 67.502204][ T7985] #PF error: [normal kernel read fault] [ 67.507726][ T7985] PGD 9874067 P4D 9874067 PUD 9876067 PMD 0 [ 67.513688][ T7985] Oops: 0000 [#1] PREEMPT SMP KASAN [ 67.518930][ T7985] CPU: 0 PID: 7985 Comm: syz-executor249 Not tainted 5.0.0-rc4-next-20190130 #22 [ 67.528017][ T7985] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.538067][ T7985] RIP: 0010:dput+0x11e/0x790 [ 67.542637][ T7985] Code: e8 97 2e a8 ff 45 84 ed 0f 84 e2 03 00 00 e8 49 2d a8 ff 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e f7 04 00 00 <45> 8b 2c 24 4d 8d bc 24 80 00 00 00 31 ff 41 83 e5 08 44 89 ee e8 [ 67.562228][ T7985] RSP: 0018:ffff88808bc57740 EFLAGS: 00010246 [ 67.568281][ T7985] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff81d9effa [ 67.576248][ T7985] RDX: 0000000000000000 RSI: ffffffff81d9ec07 RDI: 0000000000000001 [ 67.584198][ T7985] RBP: ffff88808bc577d8 R08: ffff888090abc500 R09: ffffed1015cc5b80 [ 67.592335][ T7985] R10: ffffed1015cc5b7f R11: ffff8880ae62dbfb R12: ffffffffffffffea [ 67.600292][ T7985] R13: 0000000000000001 R14: 1ffff1101178aeea R15: ffff88808bc578a0 [ 67.608253][ T7985] FS: 0000000001144880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 67.617181][ T7985] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.623751][ T7985] CR2: ffffffffffffffea CR3: 00000000946ec000 CR4: 00000000001406f0 [ 67.631704][ T7985] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.639655][ T7985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.647600][ T7985] Call Trace: [ 67.650869][ T7985] ? relay_open_buf.part.0+0xb40/0xb40 [ 67.656317][ T7985] ? shrink_dcache_sb+0x340/0x340 [ 67.661330][ T7985] ? debugfs_create_file+0x5a/0x70 [ 67.666433][ T7985] do_blk_trace_setup+0x8e9/0xdb0 [ 67.671441][ T7985] ? blk_tracer_print_line+0x60/0x60 [ 67.676703][ T7985] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.682922][ T7985] ? _copy_from_user+0xdd/0x150 [ 67.687750][ T7985] __blk_trace_setup+0xe3/0x190 [ 67.692678][ T7985] ? do_blk_trace_setup+0xdb0/0xdb0 [ 67.697954][ T7985] ? rcu_softirq_qs+0x20/0x20 [ 67.702616][ T7985] ? disk_name+0xae/0x110 [ 67.706926][ T7985] blk_trace_ioctl+0x170/0x300 [ 67.711667][ T7985] ? blk_add_trace_rq_remap+0x6b0/0x6b0 [ 67.717317][ T7985] blkdev_ioctl+0x141/0x2120 [ 67.721895][ T7985] ? __kasan_slab_free+0x102/0x150 [ 67.726982][ T7985] ? kasan_slab_free+0xe/0x10 [ 67.731637][ T7985] ? blkpg_ioctl+0xc10/0xc10 [ 67.736348][ T7985] ? do_syscall_64+0x1a3/0x800 [ 67.741095][ T7985] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.747144][ T7985] ? trace_hardirqs_off+0xb8/0x310 [ 67.752324][ T7985] ? kasan_check_read+0x11/0x20 [ 67.757159][ T7985] ? do_raw_spin_unlock+0xa0/0x330 [ 67.762256][ T7985] ? trace_hardirqs_on_caller+0x310/0x310 [ 67.768089][ T7985] ? do_raw_spin_trylock+0x270/0x270 [ 67.773359][ T7985] ? trace_hardirqs_off+0xb8/0x310 [ 67.778450][ T7985] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.784665][ T7985] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.790881][ T7985] ? check_preemption_disabled+0x48/0x290 [ 67.796576][ T7985] block_ioctl+0xee/0x130 [ 67.800884][ T7985] ? blkdev_fallocate+0x410/0x410 [ 67.805883][ T7985] do_vfs_ioctl+0x107b/0x17d0 [ 67.810544][ T7985] ? putname+0xef/0x130 [ 67.814686][ T7985] ? ioctl_preallocate+0x2f0/0x2f0 [ 67.819775][ T7985] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.825988][ T7985] ? __fget_light+0x2db/0x420 [ 67.830637][ T7985] ? fget_raw+0x20/0x20 [ 67.834769][ T7985] ? do_sys_open+0x3f9/0x7c0 [ 67.839353][ T7985] ? do_syscall_64+0x8c/0x800 [ 67.844015][ T7985] ? do_syscall_64+0x8c/0x800 [ 67.848675][ T7985] ? lockdep_hardirqs_on+0x418/0x5d0 [ 67.853961][ T7985] ? security_file_ioctl+0x93/0xc0 [ 67.859056][ T7985] ksys_ioctl+0xab/0xd0 [ 67.863302][ T7985] __x64_sys_ioctl+0x73/0xb0 [ 67.867885][ T7985] do_syscall_64+0x1a3/0x800 [ 67.872458][ T7985] ? syscall_return_slowpath+0x5f0/0x5f0 [ 67.878068][ T7985] ? prepare_exit_to_usermode+0x232/0x3b0 [ 67.883855][ T7985] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.889390][ T7985] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.895266][ T7985] RIP: 0033:0x440139 [ 67.899142][ T7985] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.918845][ T7985] RSP: 002b:00007fffa5cab9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.927324][ T7985] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440139 [ 67.935386][ T7985] RDX: 00000000200002c0 RSI: 00000000c0481273 RDI: 0000000000000003 [ 67.943338][ T7985] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.951289][ T7985] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019c0 [ 67.959243][ T7985] R13: 0000000000401a50 R14: 0000000000000000 R15: 0000000000000000 [ 67.967320][ T7985] Modules linked in: [ 67.971197][ T7985] CR2: ffffffffffffffea [ 67.975346][ T7985] ---[ end trace 9fd433d20871e341 ]--- [ 67.980800][ T7985] RIP: 0010:dput+0x11e/0x790 [ 67.985371][ T7985] Code: e8 97 2e a8 ff 45 84 ed 0f 84 e2 03 00 00 e8 49 2d a8 ff 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e f7 04 00 00 <45> 8b 2c 24 4d 8d bc 24 80 00 00 00 31 ff 41 83 e5 08 44 89 ee e8 [ 68.005075][ T7985] RSP: 0018:ffff88808bc57740 EFLAGS: 00010246 [ 68.011614][ T7985] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff81d9effa [ 68.019574][ T7985] RDX: 0000000000000000 RSI: ffffffff81d9ec07 RDI: 0000000000000001 [ 68.027528][ T7985] RBP: ffff88808bc577d8 R08: ffff888090abc500 R09: ffffed1015cc5b80 [ 68.035482][ T7985] R10: ffffed1015cc5b7f R11: ffff8880ae62dbfb R12: ffffffffffffffea [ 68.043439][ T7985] R13: 0000000000000001 R14: 1ffff1101178aeea R15: ffff88808bc578a0 [ 68.051401][ T7985] FS: 0000000001144880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 68.060410][ T7985] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.067070][ T7985] CR2: ffffffffffffffea CR3: 00000000946ec000 CR4: 00000000001406f0 [ 68.075026][ T7985] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.082974][ T7985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.090925][ T7985] Kernel panic - not syncing: Fatal exception [ 68.098041][ T7985] Kernel Offset: disabled [ 68.102366][ T7985] Rebooting in 86400 seconds..