Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.289145][ T8506] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0' [ 67.298169][ T8506] CPU: 0 PID: 8506 Comm: syz-executor463 Not tainted 5.11.0-rc2-syzkaller #0 [ 67.306945][ T8506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.317006][ T8506] Call Trace: [ 67.320292][ T8506] dump_stack+0x107/0x163 [ 67.324632][ T8506] sysfs_warn_dup.cold+0x1c/0x29 [ 67.329556][ T8506] sysfs_create_dir_ns+0x233/0x290 [ 67.334659][ T8506] ? sysfs_create_mount_point+0xb0/0xb0 [ 67.340189][ T8506] ? rwlock_bug.part.0+0x90/0x90 [ 67.345118][ T8506] ? class_dir_child_ns_type+0x9/0x60 [ 67.350480][ T8506] kobject_add_internal+0x2d2/0xa60 [ 67.355672][ T8506] kobject_add+0x150/0x1c0 [ 67.360087][ T8506] ? kset_create_and_add+0x190/0x190 [ 67.365382][ T8506] device_add+0x36a/0x1d90 [ 67.369798][ T8506] ? __fw_devlink_link_to_suppliers+0x5e0/0x5e0 [ 67.376053][ T8506] device_create_groups_vargs+0x203/0x280 [ 67.381786][ T8506] device_create+0xdf/0x120 [ 67.386298][ T8506] ? device_create_groups_vargs+0x280/0x280 [ 67.392272][ T8506] ? pointer+0x930/0x930 [ 67.396548][ T8506] ? vsnprintf+0x281/0x14f0 [ 67.401064][ T8506] bdi_register_va.part.0+0x9c/0x800 [ 67.406366][ T8506] ? cgwb_kill+0x450/0x450 [ 67.410798][ T8506] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 67.416621][ T8506] ? __wake_up_common_lock+0xde/0x130 [ 67.421989][ T8506] bdi_register+0x12a/0x140 [ 67.426486][ T8506] ? bdi_register_va.part.0+0x800/0x800 [ 67.432055][ T8506] __device_add_disk+0xbc5/0x12b0 [ 67.437080][ T8506] ? sprintf+0xc0/0x100 [ 67.441221][ T8506] ? blk_alloc_devt+0x240/0x240 [ 67.446061][ T8506] ? __init_waitqueue_head+0x97/0x110 [ 67.451440][ T8506] ? pm_runtime_init+0x2cf/0x3b0 [ 67.456367][ T8506] ? lockdep_init_map_waits+0x26a/0x720 [ 67.461923][ T8506] loop_add+0x5fb/0x880 [ 67.466081][ T8506] loop_control_ioctl+0x16c/0x470 [ 67.471109][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 67.475685][ T8506] ? __x64_sys_openat+0x13f/0x1f0 [ 67.480699][ T8506] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 67.486942][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 67.491519][ T8506] __x64_sys_ioctl+0x193/0x200 [ 67.496268][ T8506] do_syscall_64+0x2d/0x70 [ 67.500669][ T8506] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.506552][ T8506] RIP: 0033:0x440239 [ 67.510432][ T8506] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.530035][ T8506] RSP: 002b:00007ffeb8df45e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.538445][ T8506] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 67.546419][ T8506] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 67.554374][ T8506] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.562327][ T8506] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 67.570281][ T8506] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 67.580366][ T8506] kobject_add_internal failed for 7:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 67.593754][ T8506] ------------[ cut here ]------------ [ 67.599313][ T8506] WARNING: CPU: 0 PID: 8506 at block/genhd.c:745 __device_add_disk+0xfdc/0x12b0 [ 67.608427][ T8506] Modules linked in: [ 67.612326][ T8506] CPU: 0 PID: 8506 Comm: syz-executor463 Not tainted 5.11.0-rc2-syzkaller #0 [ 67.621205][ T8506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.631918][ T8506] RIP: 0010:__device_add_disk+0xfdc/0x12b0 [ 67.637896][ T8506] Code: f1 ff ff e8 f6 ac c6 fd 0f 0b e9 12 f7 ff ff 48 89 7c 24 20 e8 e5 ac c6 fd 0f 0b 48 8b 7c 24 20 e9 d6 f4 ff ff e8 d4 ac c6 fd <0f> 0b e9 f7 fb ff ff 4c 89 ef e8 d5 40 09 fe e9 7d f1 ff ff 48 8b [ 67.657787][ T8506] RSP: 0018:ffffc9000168fcf0 EFLAGS: 00010293 [ 67.663866][ T8506] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 67.671900][ T8506] RDX: ffff88801f3d5340 RSI: ffffffff83abc8cc RDI: 0000000000000003 [ 67.679962][ T8506] RBP: ffff888012e89400 R08: 0000000000000000 R09: ffffffff8ebdb7f7 [ 67.687999][ T8506] R10: ffffffff83abc4c1 R11: 0000000000000000 R12: 00000000ffffffef [ 67.695998][ T8506] R13: ffff888012e89458 R14: ffff888144518c50 R15: ffff888018a5e000 [ 67.704053][ T8506] FS: 0000000000954880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 67.713722][ T8506] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.720414][ T8506] CR2: 0000000020000040 CR3: 0000000024b59000 CR4: 00000000001506f0 [ 67.728475][ T8506] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.736461][ T8506] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.744512][ T8506] Call Trace: [ 67.747867][ T8506] ? sprintf+0xc0/0x100 [ 67.752026][ T8506] ? blk_alloc_devt+0x240/0x240 [ 67.756967][ T8506] ? __init_waitqueue_head+0x97/0x110 [ 67.762350][ T8506] ? pm_runtime_init+0x2cf/0x3b0 [ 67.767339][ T8506] ? lockdep_init_map_waits+0x26a/0x720 [ 67.772917][ T8506] loop_add+0x5fb/0x880 [ 67.777297][ T8506] loop_control_ioctl+0x16c/0x470 [ 67.782410][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 67.787251][ T8506] ? __x64_sys_openat+0x13f/0x1f0 [ 67.792290][ T8506] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 67.798644][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 67.803247][ T8506] __x64_sys_ioctl+0x193/0x200 [ 67.808108][ T8506] do_syscall_64+0x2d/0x70 [ 67.812542][ T8506] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.818583][ T8506] RIP: 0033:0x440239 [ 67.822611][ T8506] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.843217][ T8506] RSP: 002b:00007ffeb8df45e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.852519][ T8506] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 67.860871][ T8506] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 67.868905][ T8506] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.876980][ T8506] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 67.885083][ T8506] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 67.893126][ T8506] Kernel panic - not syncing: panic_on_warn set ... [ 67.899707][ T8506] CPU: 0 PID: 8506 Comm: syz-executor463 Not tainted 5.11.0-rc2-syzkaller #0 [ 67.908457][ T8506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.918496][ T8506] Call Trace: [ 67.921762][ T8506] dump_stack+0x107/0x163 [ 67.926087][ T8506] panic+0x306/0x73d [ 67.929970][ T8506] ? __warn_printk+0xf3/0xf3 [ 67.934573][ T8506] ? __warn.cold+0x1a/0x44 [ 67.938999][ T8506] ? __device_add_disk+0xfdc/0x12b0 [ 67.944277][ T8506] __warn.cold+0x35/0x44 [ 67.948512][ T8506] ? __device_add_disk+0xfdc/0x12b0 [ 67.953701][ T8506] report_bug+0x1bd/0x210 [ 67.958024][ T8506] handle_bug+0x3c/0x60 [ 67.962168][ T8506] exc_invalid_op+0x14/0x40 [ 67.966690][ T8506] asm_exc_invalid_op+0x12/0x20 [ 67.971533][ T8506] RIP: 0010:__device_add_disk+0xfdc/0x12b0 [ 67.977346][ T8506] Code: f1 ff ff e8 f6 ac c6 fd 0f 0b e9 12 f7 ff ff 48 89 7c 24 20 e8 e5 ac c6 fd 0f 0b 48 8b 7c 24 20 e9 d6 f4 ff ff e8 d4 ac c6 fd <0f> 0b e9 f7 fb ff ff 4c 89 ef e8 d5 40 09 fe e9 7d f1 ff ff 48 8b [ 67.997288][ T8506] RSP: 0018:ffffc9000168fcf0 EFLAGS: 00010293 [ 68.003341][ T8506] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 68.011295][ T8506] RDX: ffff88801f3d5340 RSI: ffffffff83abc8cc RDI: 0000000000000003 [ 68.019251][ T8506] RBP: ffff888012e89400 R08: 0000000000000000 R09: ffffffff8ebdb7f7 [ 68.027224][ T8506] R10: ffffffff83abc4c1 R11: 0000000000000000 R12: 00000000ffffffef [ 68.035201][ T8506] R13: ffff888012e89458 R14: ffff888144518c50 R15: ffff888018a5e000 [ 68.043182][ T8506] ? __device_add_disk+0xbd1/0x12b0 [ 68.048386][ T8506] ? __device_add_disk+0xfdc/0x12b0 [ 68.053594][ T8506] ? sprintf+0xc0/0x100 [ 68.057752][ T8506] ? blk_alloc_devt+0x240/0x240 [ 68.062597][ T8506] ? __init_waitqueue_head+0x97/0x110 [ 68.067959][ T8506] ? pm_runtime_init+0x2cf/0x3b0 [ 68.072908][ T8506] ? lockdep_init_map_waits+0x26a/0x720 [ 68.078452][ T8506] loop_add+0x5fb/0x880 [ 68.082598][ T8506] loop_control_ioctl+0x16c/0x470 [ 68.088138][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 68.092769][ T8506] ? __x64_sys_openat+0x13f/0x1f0 [ 68.097802][ T8506] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 68.104057][ T8506] ? loop_lookup+0x1d0/0x1d0 [ 68.108635][ T8506] __x64_sys_ioctl+0x193/0x200 [ 68.113399][ T8506] do_syscall_64+0x2d/0x70 [ 68.117807][ T8506] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 68.123691][ T8506] RIP: 0033:0x440239 [ 68.127572][ T8506] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.147165][ T8506] RSP: 002b:00007ffeb8df45e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.155565][ T8506] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 68.163520][ T8506] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 68.171496][ T8506] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 68.179463][ T8506] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 68.187428][ T8506] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 68.196307][ T8506] Kernel Offset: disabled [ 68.200727][ T8506] Rebooting in 86400 seconds..