[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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. [ 11.450392] random: crng init done [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.816048] kasan: CONFIG_KASAN_INLINE enabled [ 19.816820] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.817909] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.818919] Modules linked in: [ 19.819666] CPU: 0 PID: 2037 Comm: syz-executor301 Not tainted 4.9.194+ #0 [ 19.821080] task: 00000000f47c99b9 task.stack: 00000000f1ff0cf8 [ 19.822113] RIP: 0010:[] [<000000004968afb4>] blk_get_backing_dev_info+0x4a/0x70 [ 19.823602] RSP: 0018:ffff8801cf08f6c8 EFLAGS: 00010206 [ 19.824370] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff10039e11f0a [ 19.825728] RDX: 00000000000000a6 RSI: ffffffff81ae5d3d RDI: 0000000000000530 [ 19.826881] RBP: ffff8801cf08f6d0 R08: 0000000000000000 R09: 0000000000000001 [ 19.828831] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea00073e3d00 [ 19.829970] R13: ffff8801d4798948 R14: ffff8801d4798750 R15: ffffffff833f1db8 [ 19.830949] FS: 00000000025f5880(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 19.832105] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.832941] CR2: 00007f5d41dc7000 CR3: 00000001d39dd000 CR4: 00000000001606b0 [ 19.834039] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.835090] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.836260] Stack: [ 19.838411] ffff8801da49a200 ffff8801cf08f710 ffffffff8143e202 ffff8801d4798948 [ 19.846540] ffff8801d4798948 ffffea00073e3d00 ffffea00073e3d20 ffff8801d4798948 [ 19.854606] 0000000000000000 ffff8801cf08f740 ffffffff8144a790 dffffc0000000000 [ 19.862622] Call Trace: [ 19.865203] [<000000000af72750>] cancel_dirty_page+0x1a2/0x3d0 [ 19.871254] [<00000000db6b5bc5>] truncate_inode_page+0x130/0x260 [ 19.877472] [<000000002054041c>] truncate_inode_pages_range+0x20e/0xfe0 [ 19.884314] [<000000008629cd9a>] ? generic_error_remove_page+0xb0/0xb0 [ 19.891080] [<000000002aa1fc7c>] ? trace_hardirqs_on+0x10/0x10 [ 19.897127] [<000000002aa1fc7c>] ? trace_hardirqs_on+0x10/0x10 [ 19.903170] [<000000006e737569>] ? mark_held_locks+0xb1/0x100 [ 19.909138] [<00000000997511f0>] ? truncate_inode_pages_final+0x9a/0xc0 [ 19.916394] [<000000008833cb02>] ? _raw_spin_unlock_irq+0x28/0x60 [ 19.922690] [<000000001ef31838>] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 19.929522] [<00000000299b88a8>] truncate_inode_pages_final+0x81/0xc0 [ 19.936281] [<0000000094db4c38>] bdev_evict_inode+0x21/0x190 [ 19.942158] [<0000000062bf6767>] ? bdev_set+0x80/0x80 [ 19.947598] [<000000005e22accb>] evict+0x2e9/0x630 [ 19.952596] [<00000000c837c3e4>] ? find_inode_nowait+0x180/0x180 [ 19.958809] [<0000000030b01926>] iput+0x370/0x900 [ 19.963720] [<00000000a9b1fe28>] bd_forget+0xf0/0x1a0 [ 19.968985] [<00000000fb923266>] evict+0x485/0x630 [ 19.973985] [<00000000c837c3e4>] ? find_inode_nowait+0x180/0x180 [ 19.980192] [<0000000030b01926>] iput+0x370/0x900 [ 19.985188] [<000000001d2921a5>] dentry_unlink_inode+0x277/0x330 [ 19.991397] [<00000000da54fab4>] __dentry_kill+0x333/0x580 [ 19.997086] [<0000000048b4b63f>] ? dput.part.0+0x2a/0x7c0 [ 20.002685] [<0000000048b4b63f>] ? dput.part.0+0x2a/0x7c0 [ 20.008439] [<00000000015d033a>] dput.part.0+0x5d9/0x7c0 [ 20.013968] [<0000000048b4b63f>] ? dput.part.0+0x2a/0x7c0 [ 20.019698] [<000000003b1b80f0>] do_one_tree+0x44/0x50 [ 20.025147] [<0000000037117740>] shrink_dcache_for_umount+0x67/0x160 [ 20.031921] [<000000000f2c2dae>] generic_shutdown_super+0x6d/0x300 [ 20.038325] [<0000000045682902>] kill_anon_super+0x3f/0x60 [ 20.044024] [<00000000ca6c79c4>] fuse_kill_sb_anon+0x42/0x50 [ 20.049903] [<00000000fac3314b>] deactivate_locked_super+0x79/0xe0 [ 20.056318] [<000000002ccdc27c>] deactivate_super+0x8a/0xb0 [ 20.062203] [<00000000597227e9>] cleanup_mnt+0xb2/0x160 [ 20.067895] [<00000000d94d44ec>] __cleanup_mnt+0x16/0x20 [ 20.073506] [<00000000bc55be8c>] task_work_run+0x108/0x180 [ 20.079213] [<00000000d8591e2f>] do_exit+0x78f/0x2aa0 [ 20.084485] [<000000004303f58e>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 20.091237] [<00000000989b8525>] ? release_task+0x14a0/0x14a0 [ 20.097190] [<0000000081ab49a6>] ? __do_page_fault+0x41e/0xa60 [ 20.103227] [<00000000c77b596e>] ? up_read+0x1a/0x40 [ 20.108486] [<00000000e7188b5e>] ? __do_page_fault+0x545/0xa60 [ 20.114525] [<0000000043be58fd>] do_group_exit+0x111/0x300 [ 20.120228] [<00000000e1a12f6b>] SyS_exit_group+0x1d/0x20 [ 20.126116] [<0000000036d8d875>] ? do_group_exit+0x300/0x300 [ 20.131979] [<0000000028b3aca0>] do_syscall_64+0x1ad/0x5c0 [ 20.137672] [<0000000002949558>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 20.144572] 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 [ 20.173066] RIP [<000000004968afb4>] blk_get_backing_dev_info+0x4a/0x70 [ 20.180123] RSP [ 20.183866] ---[ end trace eecfcf013845c8f5 ]--- [ 20.188736] Kernel panic - not syncing: Fatal exception [ 20.194889] Kernel Offset: disabled [ 20.198510] Rebooting in 86400 seconds..