[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.123287] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 11.903931] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.992394] kasan: CONFIG_KASAN_INLINE enabled [ 19.993224] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.994300] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.995213] Modules linked in: [ 19.995707] CPU: 0 PID: 2035 Comm: syz-executor032 Not tainted 4.9.194+ #0 [ 19.996926] task: 000000001f141c5c task.stack: 0000000059c8b67c [ 19.997845] RIP: 0010:[] [<000000007d39d6d0>] blk_get_backing_dev_info+0x4a/0x70 [ 19.999242] RSP: 0018:ffff8801c4a6f6c8 EFLAGS: 00010206 [ 20.000017] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1003894df0a [ 20.001118] RDX: 00000000000000a6 RSI: ffffffff81ae5d3d RDI: 0000000000000530 [ 20.002321] RBP: ffff8801c4a6f6d0 R08: 0000000000000000 R09: 0000000000000001 [ 20.003504] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea00075b2c80 [ 20.004605] R13: ffff8801d9196548 R14: ffff8801d9196350 R15: ffffffff833f1db8 [ 20.005707] FS: 0000000000703880(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 20.006863] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.007801] CR2: 00007f98bd8d3000 CR3: 00000001d4162000 CR4: 00000000001606b0 [ 20.009010] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.010326] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.011332] Stack: [ 20.011737] ffff8801da49a200 ffff8801c4a6f710 ffffffff8143e202 ffff8801d9196548 [ 20.015574] ffff8801d9196548 ffffea00075b2c80 ffffea00075b2ca0 ffff8801d9196548 [ 20.023580] 0000000000000000 ffff8801c4a6f740 ffffffff8144a790 dffffc0000000000 [ 20.031576] Call Trace: [ 20.034151] [<0000000020c9aae3>] cancel_dirty_page+0x1a2/0x3d0 [ 20.040193] [<000000007fde0a03>] truncate_inode_page+0x130/0x260 [ 20.046400] [<0000000089046636>] truncate_inode_pages_range+0x20e/0xfe0 [ 20.053216] [<00000000468b4c36>] ? generic_error_remove_page+0xb0/0xb0 [ 20.059946] [<00000000ab90e383>] ? trace_hardirqs_on+0x10/0x10 [ 20.065978] [<00000000ab90e383>] ? trace_hardirqs_on+0x10/0x10 [ 20.072012] [<000000002035793c>] ? mark_held_locks+0xb1/0x100 [ 20.077960] [<00000000fee55e5d>] ? truncate_inode_pages_final+0x9a/0xc0 [ 20.084778] [<000000001ba21446>] ? _raw_spin_unlock_irq+0x28/0x60 [ 20.091071] [<000000005bb0177b>] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 20.097884] [<000000008df902f4>] truncate_inode_pages_final+0x81/0xc0 [ 20.104548] [<0000000025875e83>] bdev_evict_inode+0x21/0x190 [ 20.110408] [<000000008d8b8dbc>] ? bdev_set+0x80/0x80 [ 20.115678] [<000000002f59212f>] evict+0x2e9/0x630 [ 20.120671] [<00000000cec7a146>] ? find_inode_nowait+0x180/0x180 [ 20.126877] [<00000000c3f16f3c>] iput+0x370/0x900 [ 20.131875] [<0000000099edeeda>] bd_forget+0xf0/0x1a0 [ 20.137126] [<00000000eeca771f>] evict+0x485/0x630 [ 20.142127] [<00000000cec7a146>] ? find_inode_nowait+0x180/0x180 [ 20.148353] [<00000000c3f16f3c>] iput+0x370/0x900 [ 20.153280] [<0000000059282f60>] dentry_unlink_inode+0x277/0x330 [ 20.159489] [<00000000df53004a>] __dentry_kill+0x333/0x580 [ 20.165185] [<00000000772de6a5>] ? dput.part.0+0x2a/0x7c0 [ 20.170802] [<00000000772de6a5>] ? dput.part.0+0x2a/0x7c0 [ 20.176415] [<00000000ee994bd5>] dput.part.0+0x5d9/0x7c0 [ 20.181932] [<00000000772de6a5>] ? dput.part.0+0x2a/0x7c0 [ 20.187533] [<00000000e60c57f5>] do_one_tree+0x44/0x50 [ 20.192874] [<0000000035a43dd8>] shrink_dcache_for_umount+0x67/0x160 [ 20.199440] [<00000000e9bd84de>] generic_shutdown_super+0x6d/0x300 [ 20.205824] [<00000000a6fc5441>] kill_anon_super+0x3f/0x60 [ 20.211573] [<00000000875b0e0b>] fuse_kill_sb_anon+0x42/0x50 [ 20.217440] [<00000000237589f0>] deactivate_locked_super+0x79/0xe0 [ 20.223821] [<00000000bd12b72f>] deactivate_super+0x8a/0xb0 [ 20.229612] [<000000005871c435>] cleanup_mnt+0xb2/0x160 [ 20.235042] [<000000007a64c9cd>] __cleanup_mnt+0x16/0x20 [ 20.240557] [<00000000856dfc37>] task_work_run+0x108/0x180 [ 20.246244] [<00000000ebaf4aec>] do_exit+0x78f/0x2aa0 [ 20.251497] [<000000004647ccc6>] ? release_task+0x14a0/0x14a0 [ 20.257458] [<00000000422cb300>] ? preempt_schedule_common+0x4f/0xe0 [ 20.264022] [<000000002f5c5ac8>] ? preempt_schedule+0x26/0x30 [ 20.269972] [<000000006b5c6f79>] ? ___preempt_schedule+0x16/0x18 [ 20.276701] [<0000000015a97a57>] do_group_exit+0x111/0x300 [ 20.282389] [<00000000f84040f6>] SyS_exit_group+0x1d/0x20 [ 20.287997] [<000000009c8dae96>] ? do_group_exit+0x300/0x300 [ 20.293857] [<00000000476e9069>] do_syscall_64+0x1ad/0x5c0 [ 20.299544] [<000000007cb9bbaf>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 20.306443] Code: 89 fa 48 c1 ea 03 80 3c 02 00 75 35 48 8b 9b e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 30 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 17 48 8b 83 30 05 00 00 5b 5d 48 05 20 02 00 00 [ 20.333457] RIP [<000000007d39d6d0>] blk_get_backing_dev_info+0x4a/0x70 [ 20.340411] RSP [ 20.344265] ---[ end trace 13732cc4ca92d792 ]--- [ 20.349019] Kernel panic - not syncing: Fatal exception [ 20.354969] Kernel Offset: disabled [ 20.358579] Rebooting in 86400 seconds..