[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 71.034993][ T8495] loop0: detected capacity change from 0 to 131072 [ 71.046155][ T8496] loop3: detected capacity change from 0 to 131072 [ 71.060405][ T8495] BTRFS: device fsid 303d6100-8482-41df-9ea8-c5262782515b devid 1 transid 7 /dev/loop0 scanned by syz-executor956 (8495) [ 71.075464][ T8503] loop5: detected capacity change from 0 to 131072 [ 71.085022][ T8504] loop2: detected capacity change from 0 to 131072 [ 71.093510][ T8506] loop1: detected capacity change from 0 to 131072 [ 71.111259][ T8495] BTRFS error (device loop0): dev_item UUID does not match metadata fsid: 303d6100-8482-41df-9ea8-c5262782515b != 00000000-0000-0000-0000-000000000000 [ 71.129960][ T8505] loop4: detected capacity change from 0 to 131072 [ 71.133309][ T8495] BTRFS error (device loop0): superblock contains fatal errors [ 71.150558][ T8496] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor956 (8496) [ 71.177694][ T8503] BTRFS warning: duplicate device /dev/loop5 devid 1 generation 7 scanned by syz-executor956 (8503) executing program [ 71.213040][ T8504] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 7 scanned by syz-executor956 (8504) executing program [ 71.277485][ T8503] loop5: detected capacity change from 0 to 135266304 [ 71.291700][ T8506] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor956 (8506) [ 71.349144][ T8504] loop2: detected capacity change from 0 to 135266304 executing program [ 71.443748][ T8505] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor956 (8505) [ 71.477529][ T8506] loop1: detected capacity change from 0 to 135266304 executing program [ 71.531815][ T8495] BTRFS error (device loop0): open_ctree failed [ 71.535576][ T8521] BTRFS: device fsid 303d6100-8482-41df-9ea8-c5262782515b devid 1 transid 7 /dev/loop5 scanned by systemd-udevd (8521) [ 71.572053][ T8537] loop3: detected capacity change from 0 to 131072 executing program executing program [ 71.634493][ T8505] loop4: detected capacity change from 0 to 135266304 [ 71.655163][ T8495] loop0: detected capacity change from 0 to 135266304 executing program executing program [ 71.708248][ T8550] loop2: detected capacity change from 0 to 131072 executing program executing program executing program executing program [ 71.809533][ T8537] BTRFS info (device loop5): has skinny extents [ 71.831892][ T8531] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (8531) executing program executing program [ 71.884158][ T8579] loop0: detected capacity change from 0 to 131072 [ 71.895740][ T8580] loop4: detected capacity change from 0 to 131072 [ 71.904154][ T8550] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 7 scanned by syz-executor956 (8550) [ 71.919187][ T28] BTRFS error (device loop5): bad tree block start, want 30621696 have 0 [ 71.942272][ T28] BTRFS error (device loop5): bad tree block start, want 30621696 have 0 [ 71.956447][ T8537] BTRFS warning (device loop5): couldn't read tree root [ 71.973202][ T8550] loop2: detected capacity change from 0 to 135266304 [ 71.983936][ T8579] loop0: detected capacity change from 0 to 135266304 [ 72.185218][ T8580] loop4: detected capacity change from 0 to 135266304 [ 72.320982][ T8586] loop1: detected capacity change from 0 to 135266304 [ 72.360899][ T8537] ------------[ cut here ]------------ executing program executing program executing program [ 72.366582][ T8537] WARNING: CPU: 1 PID: 8537 at fs/btrfs/volumes.c:1174 close_fs_devices+0x71d/0x930 [ 72.380657][ T8537] Modules linked in: [ 72.384695][ T8537] CPU: 1 PID: 8537 Comm: syz-executor956 Not tainted 5.10.0-rc5-next-20201127-syzkaller #0 [ 72.395243][ T8537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.405990][ T8537] RIP: 0010:close_fs_devices+0x71d/0x930 [ 72.412155][ T8537] Code: e8 88 2f 42 fe 85 db 0f 85 5d f9 ff ff e8 9b 27 42 fe 0f 0b e9 51 f9 ff ff e8 8f 27 42 fe 0f 0b e9 c0 fe ff ff e8 83 27 42 fe <0f> 0b e9 f9 fe ff ff 48 c7 c7 1c 80 ee 8c e8 40 fb 84 fe e9 11 f9 [ 72.433302][ T8537] RSP: 0018:ffffc9000183f750 EFLAGS: 00010293 [ 72.439402][ T8537] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 72.449358][ T8537] RDX: ffff88801e07b580 RSI: ffffffff832e99dd RDI: 0000000000000003 [ 72.459329][ T8537] RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff88801a17b93b [ 72.463018][ T8608] loop5: detected capacity change from 0 to 131072 [ 72.467790][ T8537] R10: ffffffff832e98d4 R11: 0000000000000000 R12: ffff88801a17b938 [ 72.479011][ T8607] loop2: detected capacity change from 0 to 131072 [ 72.482183][ T8537] R13: ffff88801a17b9f4 R14: ffff888013e1c908 R15: ffff88801a17b850 [ 72.492623][ T8609] loop0: detected capacity change from 0 to 131072 [ 72.497905][ T8537] FS: 00000000025a7880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 72.513005][ T8537] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.519719][ T8537] CR2: 00007f674003e048 CR3: 0000000012337000 CR4: 00000000001506e0 [ 72.527692][ T8537] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.536088][ T8537] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.544483][ T8537] Call Trace: [ 72.547803][ T8537] btrfs_close_devices+0x8e/0x4b0 [ 72.553090][ T8537] ? btrfs_free_extra_devids+0x1a0/0x1a0 [ 72.558920][ T8537] ? btrfs_destroy_inode+0x5f0/0x5f0 [ 72.564307][ T8537] open_ctree+0x3f90/0x4035 executing program executing program [ 72.568832][ T8537] ? btrfs_mount_rw.cold+0x138/0x138 [ 72.575687][ T8537] ? sget+0x124/0x580 [ 72.593867][ T8619] loop4: detected capacity change from 0 to 131072 [ 72.595932][ T8537] btrfs_mount_root.cold+0x14/0x165 [ 72.630279][ T8622] loop1: detected capacity change from 0 to 131072 [ 72.638031][ T8537] ? parse_rescue_options+0x350/0x350 [ 72.660356][ T8537] ? rcu_read_lock_sched_held+0x3a/0x70 [ 72.680224][ T8537] ? kfree+0x4f7/0x5c0 [ 72.684429][ T8537] ? vfs_parse_fs_string+0xf8/0x150 [ 72.700942][ T8537] ? vfs_parse_fs_param+0x550/0x550 [ 72.712987][ T8537] ? parse_rescue_options+0x350/0x350 [ 72.718381][ T8537] legacy_get_tree+0x105/0x220 [ 72.724044][ T8537] vfs_get_tree+0x89/0x2f0 [ 72.728487][ T8537] vfs_kern_mount.part.0+0xd3/0x170 [ 72.734896][ T8537] vfs_kern_mount+0x3c/0x60 [ 72.739427][ T8537] btrfs_mount+0x234/0xa20 [ 72.745425][ T8537] ? btrfs_show_options+0x12b0/0x12b0 [ 72.752127][ T8537] ? rcu_read_lock_sched_held+0x3a/0x70 [ 72.757703][ T8537] ? kfree+0x4f7/0x5c0 [ 72.769764][ T8537] ? logfc+0x590/0x590 [ 72.774159][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.781200][ T8537] ? apparmor_capable+0x1d8/0x460 [ 72.786546][ T8537] ? btrfs_show_options+0x12b0/0x12b0 [ 72.792968][ T8537] legacy_get_tree+0x105/0x220 [ 72.798054][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.805029][ T8537] vfs_get_tree+0x89/0x2f0 [ 72.810135][ T8537] path_mount+0x12ae/0x1e70 [ 72.814947][ T8537] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 72.821845][ T8537] ? strncpy_from_user+0x2a0/0x3e0 [ 72.827263][ T8537] ? finish_automount+0xac0/0xac0 [ 72.833147][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.840053][ T8537] ? getname_flags.part.0+0x1dd/0x4f0 [ 72.846052][ T8537] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 72.853003][ T8537] __x64_sys_mount+0x27f/0x300 [ 72.858065][ T8537] ? copy_mnt_ns+0xae0/0xae0 [ 72.863405][ T8537] ? syscall_enter_from_user_mode+0x1d/0x50 [ 72.870068][ T8537] do_syscall_64+0x2d/0x70 [ 72.874790][ T8537] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.881289][ T8537] RIP: 0033:0x4492fa [ 72.885477][ T8537] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd a2 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 aa a2 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 72.905834][ T8537] RSP: 002b:00007ffe66329388 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 72.915257][ T8537] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004492fa [ 72.938387][ T8537] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe663293d0 [ 72.958160][ T8537] RBP: 00007ffe66329410 R08: 00007ffe66329410 R09: 0000000000000000 [ 72.978251][ T8537] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 [ 72.990315][ T8537] R13: 00007ffe663293d0 R14: 0000000000000003 R15: 0000000000000005 [ 72.998665][ T8537] Kernel panic - not syncing: panic_on_warn set ... [ 73.005264][ T8537] CPU: 1 PID: 8537 Comm: syz-executor956 Not tainted 5.10.0-rc5-next-20201127-syzkaller #0 [ 73.015238][ T8537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.025293][ T8537] Call Trace: [ 73.028600][ T8537] dump_stack+0x107/0x163 [ 73.032940][ T8537] panic+0x306/0x73d [ 73.036842][ T8537] ? __warn_printk+0xf3/0xf3 [ 73.041455][ T8537] ? __warn.cold+0x1a/0x44 [ 73.045881][ T8537] ? close_fs_devices+0x71d/0x930 [ 73.051017][ T8537] __warn.cold+0x35/0x44 [ 73.055266][ T8537] ? close_fs_devices+0x71d/0x930 [ 73.060296][ T8537] report_bug+0x1bd/0x210 [ 73.064641][ T8537] handle_bug+0x3c/0x60 [ 73.068902][ T8537] exc_invalid_op+0x14/0x40 [ 73.073414][ T8537] asm_exc_invalid_op+0x12/0x20 [ 73.078271][ T8537] RIP: 0010:close_fs_devices+0x71d/0x930 [ 73.083908][ T8537] Code: e8 88 2f 42 fe 85 db 0f 85 5d f9 ff ff e8 9b 27 42 fe 0f 0b e9 51 f9 ff ff e8 8f 27 42 fe 0f 0b e9 c0 fe ff ff e8 83 27 42 fe <0f> 0b e9 f9 fe ff ff 48 c7 c7 1c 80 ee 8c e8 40 fb 84 fe e9 11 f9 [ 73.103517][ T8537] RSP: 0018:ffffc9000183f750 EFLAGS: 00010293 [ 73.109602][ T8537] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 73.117584][ T8537] RDX: ffff88801e07b580 RSI: ffffffff832e99dd RDI: 0000000000000003 [ 73.125563][ T8537] RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff88801a17b93b [ 73.133546][ T8537] R10: ffffffff832e98d4 R11: 0000000000000000 R12: ffff88801a17b938 [ 73.141528][ T8537] R13: ffff88801a17b9f4 R14: ffff888013e1c908 R15: ffff88801a17b850 [ 73.149529][ T8537] ? close_fs_devices+0x614/0x930 [ 73.154577][ T8537] ? close_fs_devices+0x71d/0x930 [ 73.159627][ T8537] btrfs_close_devices+0x8e/0x4b0 [ 73.164662][ T8537] ? btrfs_free_extra_devids+0x1a0/0x1a0 [ 73.170304][ T8537] ? btrfs_destroy_inode+0x5f0/0x5f0 [ 73.175634][ T8537] open_ctree+0x3f90/0x4035 [ 73.180161][ T8537] ? btrfs_mount_rw.cold+0x138/0x138 [ 73.185472][ T8537] ? sget+0x124/0x580 [ 73.189468][ T8537] btrfs_mount_root.cold+0x14/0x165 [ 73.194680][ T8537] ? parse_rescue_options+0x350/0x350 [ 73.200064][ T8537] ? rcu_read_lock_sched_held+0x3a/0x70 [ 73.205615][ T8537] ? kfree+0x4f7/0x5c0 [ 73.209701][ T8537] ? vfs_parse_fs_string+0xf8/0x150 [ 73.214907][ T8537] ? vfs_parse_fs_param+0x550/0x550 [ 73.220118][ T8537] ? parse_rescue_options+0x350/0x350 [ 73.225495][ T8537] legacy_get_tree+0x105/0x220 [ 73.230268][ T8537] vfs_get_tree+0x89/0x2f0 [ 73.234692][ T8537] vfs_kern_mount.part.0+0xd3/0x170 [ 73.239899][ T8537] vfs_kern_mount+0x3c/0x60 [ 73.244415][ T8537] btrfs_mount+0x234/0xa20 [ 73.248839][ T8537] ? btrfs_show_options+0x12b0/0x12b0 [ 73.254229][ T8537] ? rcu_read_lock_sched_held+0x3a/0x70 [ 73.259778][ T8537] ? kfree+0x4f7/0x5c0 [ 73.263851][ T8537] ? logfc+0x590/0x590 [ 73.267934][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.274181][ T8537] ? apparmor_capable+0x1d8/0x460 [ 73.279228][ T8537] ? btrfs_show_options+0x12b0/0x12b0 [ 73.284607][ T8537] legacy_get_tree+0x105/0x220 [ 73.289639][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.295890][ T8537] vfs_get_tree+0x89/0x2f0 [ 73.300314][ T8537] path_mount+0x12ae/0x1e70 [ 73.304831][ T8537] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.311075][ T8537] ? strncpy_from_user+0x2a0/0x3e0 [ 73.316192][ T8537] ? finish_automount+0xac0/0xac0 [ 73.321223][ T8537] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.327466][ T8537] ? getname_flags.part.0+0x1dd/0x4f0 [ 73.332845][ T8537] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.339123][ T8537] __x64_sys_mount+0x27f/0x300 [ 73.343893][ T8537] ? copy_mnt_ns+0xae0/0xae0 [ 73.348500][ T8537] ? syscall_enter_from_user_mode+0x1d/0x50 [ 73.354407][ T8537] do_syscall_64+0x2d/0x70 [ 73.358833][ T8537] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.364817][ T8537] RIP: 0033:0x4492fa [ 73.368718][ T8537] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd a2 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 aa a2 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 73.388365][ T8537] RSP: 002b:00007ffe66329388 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 73.396788][ T8537] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004492fa [ 73.404876][ T8537] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe663293d0 [ 73.412867][ T8537] RBP: 00007ffe66329410 R08: 00007ffe66329410 R09: 0000000000000000 [ 73.420852][ T8537] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 [ 73.428828][ T8537] R13: 00007ffe663293d0 R14: 0000000000000003 R15: 0000000000000005 [ 73.437679][ T8537] Kernel Offset: disabled [ 73.442087][ T8537] Rebooting in 86400 seconds..