[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.583323][ T27] audit: type=1800 audit(1576736182.389:25): pid=9158 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.616921][ T27] audit: type=1800 audit(1576736182.399:26): pid=9158 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.638761][ T27] audit: type=1800 audit(1576736182.399:27): pid=9158 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 '10.128.0.83' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.402253][ T22] BUG: unable to handle page fault for address: fffff52000600000 [ 80.410031][ T22] #PF: supervisor read access in kernel mode [ 80.416164][ T22] #PF: error_code(0x0000) - not-present page [ 80.422431][ T22] PGD 21ffee067 P4D 21ffee067 PUD aa51c067 PMD a7d09067 PTE 0 [ 80.429881][ T22] Oops: 0000 [#1] PREEMPT SMP KASAN [ 80.435199][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 80.443325][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.453559][ T22] Workqueue: xfs-buf/loop0 xfs_buf_ioend_work [ 80.459618][ T22] RIP: 0010:xfs_sb_quiet_read_verify+0x47/0xc0 [ 80.466254][ T22] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7f 49 8b 9c 24 30 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 50 8b 1b bf 58 46 53 42 89 de e8 [ 80.486672][ T22] RSP: 0018:ffffc90000de7cc0 EFLAGS: 00010a06 [ 80.492736][ T22] RAX: dffffc0000000000 RBX: ffffc90003000000 RCX: ffffffff82ad3c26 [ 80.500709][ T22] RDX: 1ffff92000600000 RSI: ffffffff82aa0a0f RDI: ffff88809f1b7a70 [ 80.509189][ T22] RBP: ffffc90000de7cd0 R08: ffff8880a9bee5c0 R09: ffffed1015d2703d [ 80.517167][ T22] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff88809f1b7940 [ 80.525120][ T22] R13: ffff88809f1b795c R14: ffff88809f1b7b74 R15: 0000000000000000 [ 80.533087][ T22] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.542092][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.548677][ T22] CR2: fffff52000600000 CR3: 00000000a05f1000 CR4: 00000000001406e0 [ 80.556631][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.564610][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.572666][ T22] Call Trace: [ 80.575944][ T22] xfs_buf_ioend+0x3f9/0xde0 [ 80.580522][ T22] ? trace_hardirqs_on+0x67/0x240 [ 80.585525][ T22] xfs_buf_ioend_work+0x19/0x20 [ 80.590371][ T22] process_one_work+0x9af/0x1740 [ 80.595293][ T22] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.600642][ T22] ? lock_acquire+0x190/0x410 [ 80.605300][ T22] worker_thread+0x98/0xe40 [ 80.609784][ T22] ? trace_hardirqs_on+0x67/0x240 [ 80.614804][ T22] kthread+0x361/0x430 [ 80.618850][ T22] ? process_one_work+0x1740/0x1740 [ 80.624036][ T22] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 80.629746][ T22] ret_from_fork+0x24/0x30 [ 80.634151][ T22] Modules linked in: [ 80.638026][ T22] CR2: fffff52000600000 [ 80.642176][ T22] ---[ end trace 857b3f6bb2561195 ]--- [ 80.647617][ T22] RIP: 0010:xfs_sb_quiet_read_verify+0x47/0xc0 [ 80.653746][ T22] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7f 49 8b 9c 24 30 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 50 8b 1b bf 58 46 53 42 89 de e8 [ 80.673960][ T22] RSP: 0018:ffffc90000de7cc0 EFLAGS: 00010a06 [ 80.680007][ T22] RAX: dffffc0000000000 RBX: ffffc90003000000 RCX: ffffffff82ad3c26 [ 80.688130][ T22] RDX: 1ffff92000600000 RSI: ffffffff82aa0a0f RDI: ffff88809f1b7a70 [ 80.696080][ T22] RBP: ffffc90000de7cd0 R08: ffff8880a9bee5c0 R09: ffffed1015d2703d [ 80.704301][ T22] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff88809f1b7940 [ 80.712435][ T22] R13: ffff88809f1b795c R14: ffff88809f1b7b74 R15: 0000000000000000 [ 80.721608][ T22] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.730516][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.738219][ T22] CR2: fffff52000600000 CR3: 00000000a05f1000 CR4: 00000000001406e0 [ 80.746324][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.754280][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.762232][ T22] Kernel panic - not syncing: Fatal exception [ 80.769713][ T22] Kernel Offset: disabled [ 80.774053][ T22] Rebooting in 86400 seconds..