Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.168' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.269688][ T8466] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0' [ 74.278776][ T8466] CPU: 1 PID: 8466 Comm: syz-executor995 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 [ 74.288979][ T8466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.299294][ T8466] Call Trace: [ 74.302801][ T8466] dump_stack_lvl+0x13e/0x1d6 [ 74.307527][ T8466] sysfs_warn_dup.cold+0x1c/0x29 [ 74.312510][ T8466] sysfs_create_dir_ns+0x233/0x290 [ 74.320305][ T8466] ? sysfs_create_mount_point+0xb0/0xb0 [ 74.326099][ T8466] ? rwlock_bug.part.0+0x90/0x90 [ 74.331212][ T8466] ? class_dir_child_ns_type+0x9/0x60 [ 74.336612][ T8466] kobject_add_internal+0x2d2/0xa60 [ 74.341874][ T8466] kobject_add+0x150/0x1c0 [ 74.346340][ T8466] ? kset_create_and_add+0x190/0x190 [ 74.351762][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 74.357285][ T8466] device_add+0x36a/0x2100 [ 74.361762][ T8466] ? rcu_read_lock_sched_held+0x3a/0x70 [ 74.367364][ T8466] ? kfree+0x226/0x650 [ 74.371482][ T8466] ? memcpy+0x39/0x60 [ 74.375537][ T8466] ? __fw_devlink_link_to_suppliers+0x5e0/0x5e0 [ 74.381834][ T8466] device_create_groups_vargs+0x203/0x280 [ 74.387693][ T8466] device_create+0xdf/0x120 [ 74.392351][ T8466] ? device_create_groups_vargs+0x280/0x280 [ 74.398412][ T8466] ? pointer+0xa00/0xa00 [ 74.402729][ T8466] ? vsnprintf+0x281/0x14f0 [ 74.407266][ T8466] bdi_register_va.part.0+0x9c/0x800 [ 74.413053][ T8466] ? cgwb_kill+0x450/0x450 [ 74.417630][ T8466] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 74.423629][ T8466] ? __wake_up_common_lock+0xde/0x130 [ 74.429150][ T8466] bdi_register+0x12a/0x140 [ 74.433740][ T8466] ? bdi_register_va.part.0+0x800/0x800 [ 74.439351][ T8466] __device_add_disk+0xe62/0x1230 [ 74.444436][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 74.449953][ T8466] ? blk_alloc_devt+0x240/0x240 [ 74.454852][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 74.460380][ T8466] loop_add+0x671/0x900 [ 74.464712][ T8466] loop_control_ioctl+0x16c/0x4f0 [ 74.469771][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 74.474401][ T8466] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.480685][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 74.485331][ T8466] __x64_sys_ioctl+0x193/0x200 [ 74.490235][ T8466] do_syscall_64+0x31/0xb0 [ 74.494696][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.500666][ T8466] RIP: 0033:0x43ee49 [ 74.504988][ T8466] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 74.525090][ T8466] RSP: 002b:00007ffeb07318c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.533548][ T8466] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 74.541668][ T8466] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 74.549710][ T8466] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 74.557722][ T8466] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 74.565928][ T8466] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 74.578086][ T8466] kobject_add_internal failed for 7:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 74.591490][ T8466] ------------[ cut here ]------------ [ 74.597798][ T8466] WARNING: CPU: 1 PID: 8466 at block/genhd.c:551 __device_add_disk+0xf56/0x1230 [ 74.607272][ T8466] Modules linked in: [ 74.611207][ T8466] CPU: 0 PID: 8466 Comm: syz-executor995 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 [ 74.622353][ T8466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.633439][ T8466] RIP: 0010:__device_add_disk+0xf56/0x1230 [ 74.639274][ T8466] Code: f1 ff ff e8 7c 80 b4 fd 0f 0b e9 26 fa ff ff 48 89 7c 24 20 e8 6b 80 b4 fd 0f 0b 48 8b 7c 24 20 e9 5e f5 ff ff e8 5a 80 b4 fd <0f> 0b e9 1a ff ff ff 4c 89 ef e8 db e2 f9 fd e9 fb f1 ff ff 48 8b [ 74.659437][ T8466] RSP: 0018:ffffc9000186fd30 EFLAGS: 00010293 [ 74.666139][ T8466] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 74.674973][ T8466] RDX: ffff888029490000 RSI: ffffffff83c15376 RDI: 0000000000000003 [ 74.683180][ T8466] RBP: ffff888024984800 R08: 0000000000000000 R09: ffffffff904409bf [ 74.691578][ T8466] R10: ffffffff83c1528e R11: 0000000000000000 R12: 00000000ffffffef [ 74.700804][ T8466] R13: ffff8880249848a0 R14: ffff88801e89aed0 R15: ffff88801de3e000 [ 74.709193][ T8466] FS: 0000000000f54300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 74.718896][ T8466] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.726356][ T8466] CR2: 00007f984b7a5008 CR3: 00000000263df000 CR4: 00000000001506f0 [ 74.734911][ T8466] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.743393][ T8466] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.751527][ T8466] Call Trace: [ 74.754965][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 74.760570][ T8466] ? blk_alloc_devt+0x240/0x240 [ 74.765600][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 74.771116][ T8466] loop_add+0x671/0x900 [ 74.775505][ T8466] loop_control_ioctl+0x16c/0x4f0 [ 74.781025][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 74.785811][ T8466] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.792093][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 74.798202][ T8466] __x64_sys_ioctl+0x193/0x200 [ 74.803930][ T8466] do_syscall_64+0x31/0xb0 [ 74.808762][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.816766][ T8466] RIP: 0033:0x43ee49 [ 74.820717][ T8466] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 74.842720][ T8466] RSP: 002b:00007ffeb07318c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.851726][ T8466] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 74.862004][ T8466] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 74.870700][ T8466] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 74.879155][ T8466] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 74.888316][ T8466] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 74.896536][ T8466] Kernel panic - not syncing: panic_on_warn set ... [ 74.903182][ T8466] CPU: 0 PID: 8466 Comm: syz-executor995 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 [ 74.913416][ T8466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.923666][ T8466] Call Trace: [ 74.926955][ T8466] dump_stack_lvl+0x13e/0x1d6 [ 74.931642][ T8466] panic+0x306/0x73d [ 74.935541][ T8466] ? __warn_printk+0xf3/0xf3 [ 74.940207][ T8466] ? __warn.cold+0x1a/0x44 [ 74.944625][ T8466] ? __device_add_disk+0xf56/0x1230 [ 74.949841][ T8466] __warn.cold+0x35/0x44 [ 74.954131][ T8466] ? __device_add_disk+0xf56/0x1230 [ 74.959756][ T8466] report_bug+0x1bd/0x210 [ 74.964174][ T8466] handle_bug+0x3c/0x60 [ 74.968487][ T8466] exc_invalid_op+0x14/0x40 [ 74.973083][ T8466] asm_exc_invalid_op+0x12/0x20 [ 74.978045][ T8466] RIP: 0010:__device_add_disk+0xf56/0x1230 [ 74.983880][ T8466] Code: f1 ff ff e8 7c 80 b4 fd 0f 0b e9 26 fa ff ff 48 89 7c 24 20 e8 6b 80 b4 fd 0f 0b 48 8b 7c 24 20 e9 5e f5 ff ff e8 5a 80 b4 fd <0f> 0b e9 1a ff ff ff 4c 89 ef e8 db e2 f9 fd e9 fb f1 ff ff 48 8b [ 75.003696][ T8466] RSP: 0018:ffffc9000186fd30 EFLAGS: 00010293 [ 75.010050][ T8466] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 75.018474][ T8466] RDX: ffff888029490000 RSI: ffffffff83c15376 RDI: 0000000000000003 [ 75.026748][ T8466] RBP: ffff888024984800 R08: 0000000000000000 R09: ffffffff904409bf [ 75.036537][ T8466] R10: ffffffff83c1528e R11: 0000000000000000 R12: 00000000ffffffef [ 75.044540][ T8466] R13: ffff8880249848a0 R14: ffff88801e89aed0 R15: ffff88801de3e000 [ 75.052906][ T8466] ? __device_add_disk+0xe6e/0x1230 [ 75.058125][ T8466] ? __device_add_disk+0xf56/0x1230 [ 75.063360][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 75.069152][ T8466] ? blk_alloc_devt+0x240/0x240 [ 75.074016][ T8466] ? lockdep_init_map_type+0x2c3/0x7b0 [ 75.079516][ T8466] loop_add+0x671/0x900 [ 75.083693][ T8466] loop_control_ioctl+0x16c/0x4f0 [ 75.088750][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 75.093371][ T8466] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 75.099821][ T8466] ? loop_lookup+0x1d0/0x1d0 [ 75.104446][ T8466] __x64_sys_ioctl+0x193/0x200 [ 75.109234][ T8466] do_syscall_64+0x31/0xb0 [ 75.113744][ T8466] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 75.120011][ T8466] RIP: 0033:0x43ee49 [ 75.123921][ T8466] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 75.144836][ T8466] RSP: 002b:00007ffeb07318c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.153293][ T8466] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 75.161303][ T8466] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 75.169287][ T8466] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 75.177362][ T8466] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 75.185347][ T8466] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 75.194333][ T8466] Kernel Offset: disabled [ 75.198788][ T8466] Rebooting in 86400 seconds..