[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.192' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 37.726132] BTRFS: device label … devid 1912602624 transid 7 /dev/loop3 [ 37.750297] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8164) [ 37.773809] BTRFS error (device loop3): unsupported checksum algorithm 256 [ 37.782695] BTRFS error (device loop3): superblock checksum mismatch [ 37.798534] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8169) [ 37.854512] BTRFS warning (device ): duplicate device /dev/loop5 devid 1912602624 generation 7 scanned by syz-executor444 (8168) executing program [ 37.901660] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8174) [ 37.963270] BTRFS error (device loop3): open_ctree failed [ 38.006825] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8169) [ 38.020801] BTRFS error (device loop2): unsupported checksum algorithm 256 [ 38.029336] BTRFS error (device loop2): superblock checksum mismatch executing program [ 38.072803] BTRFS warning (device ): duplicate device /dev/loop5 devid 1912602624 generation 7 scanned by syz-executor444 (8168) executing program executing program [ 38.179952] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8174) [ 38.212443] BTRFS error (device loop2): open_ctree failed [ 38.218448] BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop3 executing program executing program [ 38.280905] BTRFS error (device loop3): superblock checksum mismatch [ 38.301352] BTRFS error (device loop3): open_ctree failed [ 38.310975] BTRFS error (device loop3): superblock checksum mismatch executing program [ 38.330444] BTRFS error (device loop3): open_ctree failed [ 38.342284] BTRFS error (device loop3): superblock checksum mismatch [ 38.351828] BTRFS error (device loop3): open_ctree failed [ 38.359494] BTRFS error (device loop3): superblock checksum mismatch [ 38.367988] BTRFS error (device loop3): open_ctree failed [ 38.376009] BTRFS error (device loop3): superblock checksum mismatch [ 38.391773] BTRFS error (device loop3): open_ctree failed [ 38.399923] BTRFS error (device loop3): superblock checksum mismatch [ 38.492835] BTRFS error (device loop3): open_ctree failed executing program executing program executing program executing program [ 38.673162] BTRFS error (device loop5): unsupported checksum algorithm 256 [ 38.682922] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8298) [ 38.696809] BTRFS error (device loop5): superblock checksum mismatch executing program [ 38.777874] BTRFS warning (device ): duplicate device /dev/loop3 devid 1912602624 generation 7 scanned by syz-executor444 (8303) [ 38.797379] BTRFS error (device loop5): open_ctree failed [ 38.807093] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8310) executing program [ 38.823538] BTRFS error (device loop2): unsupported checksum algorithm 256 [ 38.831330] BTRFS error (device loop2): superblock checksum mismatch [ 38.864579] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8324) executing program executing program [ 39.082052] BTRFS error (device loop2): open_ctree failed executing program executing program executing program [ 39.259816] BTRFS warning (device ): duplicate device /dev/loop3 devid 1912602624 generation 7 scanned by syz-executor444 (8360) [ 39.277077] BTRFS error (device loop0): unsupported checksum algorithm 256 [ 39.286670] BTRFS error (device loop0): superblock checksum mismatch [ 39.303316] BTRFS warning (device ): duplicate device /dev/loop5 devid 1912602624 generation 7 scanned by syz-executor444 (8352) [ 39.391331] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8375) executing program executing program [ 39.450518] BTRFS warning (device ): duplicate device /dev/loop2 devid 1912602624 generation 7 scanned by syz-executor444 (8372) executing program [ 39.542571] BTRFS error (device loop0): open_ctree failed executing program executing program [ 39.746721] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8375) [ 39.760762] BTRFS error (device loop3): unsupported checksum algorithm 256 [ 39.770413] BTRFS error (device loop3): superblock checksum mismatch executing program [ 39.896517] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8413) executing program [ 39.951460] BTRFS error (device loop3): open_ctree failed [ 39.960504] BTRFS error (device loop2): unsupported checksum algorithm 256 [ 39.970013] BTRFS error (device loop2): superblock checksum mismatch executing program executing program [ 40.006168] BTRFS warning (device ): duplicate device /dev/loop5 devid 1912602624 generation 7 scanned by syz-executor444 (8430) [ 40.026512] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8442) executing program [ 40.198676] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8449) [ 40.213707] BTRFS error (device loop2): open_ctree failed [ 40.223174] BTRFS warning (device ): duplicate device /dev/loop3 devid 1912602624 generation 7 scanned by syz-executor444 (8463) [ 40.238580] BTRFS error (device loop0): unsupported checksum algorithm 256 [ 40.246024] BTRFS error (device loop0): superblock checksum mismatch executing program [ 40.323729] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8442) [ 40.349238] BTRFS error (device loop0): open_ctree failed executing program executing program [ 40.387104] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8470) [ 40.400970] BTRFS error (device loop5): unsupported checksum algorithm 256 [ 40.418319] BTRFS error (device loop5): superblock checksum mismatch executing program executing program executing program [ 40.452705] BTRFS warning (device ): duplicate device /dev/loop2 devid 1912602624 generation 7 scanned by syz-executor444 (8504) [ 40.470464] BTRFS error (device loop5): open_ctree failed [ 40.522662] BTRFS info (device loop3): disk space caching is enabled [ 40.529198] BTRFS info (device loop3): has skinny extents [ 40.559060] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8523) [ 40.577653] BTRFS warning (device ): duplicate device /dev/loop1 devid 1912602624 generation 7 scanned by syz-executor444 (8525) executing program executing program [ 40.720660] BTRFS error (device loop3): super_num_devices 1 mismatch with num_devices 1 found here [ 40.730554] BTRFS error (device loop3): failed to read chunk tree: -22 executing program [ 40.830547] BTRFS error (device loop3): open_ctree failed executing program [ 40.876713] BTRFS warning (device ): duplicate device /dev/loop2 devid 1912602624 generation 7 scanned by syz-executor444 (8575) [ 40.892084] BTRFS error (device loop1): unsupported checksum algorithm 256 [ 40.910969] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8523) [ 40.922328] BTRFS error (device loop1): superblock checksum mismatch [ 40.959067] BTRFS warning (device ): duplicate device /dev/loop5 devid 1912602624 generation 7 scanned by syz-executor444 (8580) [ 40.993804] BTRFS warning (device ): duplicate device /dev/loop3 devid 1912602624 generation 7 scanned by syz-executor444 (8567) executing program executing program executing program [ 41.163508] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8601) [ 41.216787] BTRFS error (device loop1): open_ctree failed [ 41.223417] BTRFS warning (device ): duplicate device /dev/loop2 devid 1912602624 generation 7 scanned by syz-executor444 (8622) [ 41.240504] BTRFS error (device loop5): unsupported checksum algorithm 256 [ 41.240802] BTRFS warning (device ): duplicate device /dev/loop3 devid 1912602624 generation 7 scanned by syz-executor444 (8620) [ 41.258287] BTRFS error (device loop5): superblock checksum mismatch executing program [ 41.351424] BTRFS warning (device ): duplicate device /dev/loop4 devid 1912602624 generation 7 scanned by syz-executor444 (8601) executing program [ 41.451967] BTRFS warning (device ): duplicate device /dev/loop0 devid 1912602624 generation 7 scanned by syz-executor444 (8621) executing program executing program executing program executing program [ 41.528710] BTRFS error (device loop5): open_ctree failed [ 41.540195] BTRFS info (device loop3): disk space caching is enabled [ 41.553373] BTRFS info (device loop3): has skinny extents [ 41.579984] BTRFS error (device loop3): bad tree block start, want 5242880 have 0 [ 41.588316] BTRFS warning (device loop3): failed to read tree root executing program executing program executing program [ 41.909960] ------------[ cut here ]------------ [ 41.915194] WARNING: CPU: 1 PID: 8647 at fs/btrfs/volumes.c:1086 close_fs_devices.part.0.cold+0x11/0x30 [ 41.924741] Kernel panic - not syncing: panic_on_warn set ... [ 41.924741] [ 41.932122] CPU: 1 PID: 8647 Comm: syz-executor444 Not tainted 4.19.163-syzkaller #0 [ 41.940097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.949980] Call Trace: [ 41.952665] dump_stack+0x1fc/0x2fe [ 41.956404] panic+0x26a/0x50e executing program [ 41.959684] ? __warn_printk+0xf3/0xf3 [ 41.963624] ? close_fs_devices.part.0.cold+0x11/0x30 [ 41.969180] ? __probe_kernel_read+0x130/0x1b0 [ 41.973787] ? __warn.cold+0x5/0x61 [ 41.977424] ? __warn+0xe4/0x200 [ 41.980894] ? close_fs_devices.part.0.cold+0x11/0x30 [ 41.986117] __warn.cold+0x20/0x61 [ 41.989795] ? close_fs_devices.part.0.cold+0x11/0x30 [ 41.995000] report_bug+0x262/0x2b0 [ 41.998924] do_error_trap+0x1d7/0x310 [ 42.002923] ? math_error+0x310/0x310 executing program [ 42.006743] ? __irq_work_queue_local+0x101/0x160 [ 42.012146] ? irq_work_queue+0x29/0x80 [ 42.016247] ? error_entry+0x72/0xd0 [ 42.020065] ? trace_hardirqs_off_caller+0x6e/0x210 [ 42.025192] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.030057] invalid_op+0x14/0x20 [ 42.033986] RIP: 0010:close_fs_devices.part.0.cold+0x11/0x30 [ 42.039841] Code: c7 c7 a0 f4 a4 88 e8 7a b1 56 fe 0f 0b 49 c7 c4 ea ff ff ff e9 d7 06 ff ff e8 d8 b7 6b fe 48 c7 c7 a0 f4 a4 88 e8 5b b1 56 fe <0f> 0b e9 b4 0e ff ff e8 c0 b7 6b fe 48 c7 c7 a0 f4 a4 88 e8 43 b1 [ 42.058842] RSP: 0018:ffff8880a249f600 EFLAGS: 00010282 [ 42.064216] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 42.071504] RDX: 0000000000000000 RSI: ffffffff814fdbb1 RDI: ffffed1014493eb2 [ 42.078960] RBP: ffff8880aa2fe000 R08: 0000000000000024 R09: 0000000000000000 [ 42.086329] R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 [ 42.093616] R13: ffff8880a9aa2580 R14: ffff88809003ede0 R15: ffff8880b4dc7b00 [ 42.101008] ? vprintk_func+0x81/0x17e [ 42.105275] btrfs_close_devices+0x95/0x1f0 [ 42.109621] open_ctree+0x26b/0x61e0 [ 42.113728] ? close_ctree+0x850/0x850 [ 42.117817] ? vsprintf+0x30/0x30 [ 42.121834] ? btrfs_kill_super+0x550/0x550 [ 42.126298] ? btrfs_kill_super+0x550/0x550 [ 42.130813] btrfs_mount_root+0x12e5/0x1830 [ 42.135159] ? btrfs_decode_error+0x70/0x70 [ 42.139505] ? __mutex_unlock_slowpath+0xea/0x610 [ 42.144374] ? check_preemption_disabled+0x41/0x280 [ 42.149417] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 42.154451] ? pcpu_alloc+0xc9/0x1190 [ 42.158407] ? __lockdep_init_map+0x100/0x5a0 [ 42.162925] mount_fs+0xa3/0x30c [ 42.166399] vfs_kern_mount.part.0+0x68/0x470 [ 42.170913] ? kfree+0x110/0x210 [ 42.174385] vfs_kern_mount+0x3c/0x60 [ 42.178378] btrfs_mount+0x23a/0xa93 [ 42.182108] ? btrfs_show_options+0xfd0/0xfd0 [ 42.186796] ? __mutex_unlock_slowpath+0xea/0x610 [ 42.191841] ? check_preemption_disabled+0x41/0x280 [ 42.196968] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 42.202022] ? pcpu_alloc+0xc9/0x1190 [ 42.205856] ? __lockdep_init_map+0x100/0x5a0 [ 42.210462] mount_fs+0xa3/0x30c [ 42.213857] vfs_kern_mount.part.0+0x68/0x470 [ 42.218901] do_mount+0x113c/0x2f10 [ 42.222644] ? do_raw_spin_unlock+0x171/0x230 [ 42.227166] ? check_preemption_disabled+0x41/0x280 [ 42.232989] ? copy_mount_string+0x40/0x40 [ 42.237329] ? copy_mount_options+0x59/0x380 [ 42.241754] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 42.246802] ? kmem_cache_alloc_trace+0x323/0x380 [ 42.251668] ? copy_mount_options+0x26f/0x380 [ 42.256187] ksys_mount+0xcf/0x130 [ 42.259746] __x64_sys_mount+0xba/0x150 [ 42.263735] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 42.268329] do_syscall_64+0xf9/0x620 [ 42.272665] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.277864] RIP: 0033:0x44deba [ 42.281242] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad a0 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a a0 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 42.300860] RSP: 002b:00007f1a2472abc8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 42.308668] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000044deba [ 42.315948] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1a2472ac10 [ 42.323752] RBP: 00007f1a2472b6d0 R08: 00007f1a2472ac50 R09: 0000000000000000 [ 42.331145] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f1a2472ac50 [ 42.338426] R13: 00007f1a2472ac10 R14: 0000000000000003 R15: 0000000000000001 [ 42.346814] Kernel Offset: disabled [ 42.350751] Rebooting in 86400 seconds..