Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts. [* ] A start job is running for dev-ttyS0.device (8s / 1min 30s)[** ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[*** ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[ ***] A start job is running for dev-ttyS0.device (11s / 1min 30s)[ **] A start job is running for dev-ttyS0.device (12s / 1min 30s)[ *] A start job is running for dev-ttyS0.device (12s / 1min 30s)[ 19.077382][ T22] audit: type=1400 audit(1607559494.148:8): avc: denied { execmem } for pid=354 comm="syz-executor303" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 19.098195][ T354] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0' [ 19.106408][ T354] CPU: 0 PID: 354 Comm: syz-executor303 Not tainted 5.4.82-syzkaller-00042-gd7ec680881a1 #0 [ 19.116584][ T354] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.126676][ T354] Call Trace: [ 19.129945][ T354] dump_stack+0x1dd/0x24e [ 19.134253][ T354] ? devkmsg_release+0x11c/0x11c [ 19.139168][ T354] ? show_regs_print_info+0x12/0x12 [ 19.144492][ T354] ? sysfs_create_dir_ns+0x27e/0x3a0 [ 19.149753][ T354] ? kernfs_path_from_node+0x4c/0x60 [ 19.155012][ T354] sysfs_create_dir_ns+0x2d1/0x3a0 [ 19.160123][ T354] ? sysfs_warn_dup+0xb0/0xb0 [ 19.164845][ T354] kobject_add_internal+0x55f/0xb50 [ 19.170020][ T354] kobject_add+0x156/0x230 [ 19.174413][ T354] ? _raw_spin_lock+0xa3/0x1b0 [ 19.179154][ T354] ? kobject_init+0x1d0/0x1d0 [ 19.183870][ T354] ? mutex_unlock+0x19/0x40 [ 19.188347][ T354] ? get_device_parent+0x332/0x4c0 [ 19.193435][ T354] device_add+0x476/0x18b0 [ 19.197830][ T354] ? __kmalloc_track_caller+0x20e/0x2c0 [ 19.203472][ T354] ? virtual_device_parent+0x50/0x50 [ 19.208733][ T354] ? memcpy+0x38/0x50 [ 19.212693][ T354] device_create_vargs+0x1c4/0x220 [ 19.217816][ T354] device_create+0xea/0x130 [ 19.222294][ T354] ? device_create_vargs+0x220/0x220 [ 19.227553][ T354] bdi_register_va+0x89/0x5c0 [ 19.232218][ T354] bdi_register+0xd1/0x120 [ 19.236624][ T354] ? __device_add_disk+0x538/0x1250 [ 19.241800][ T354] ? bdi_register_va+0x5c0/0x5c0 [ 19.246917][ T354] ? percpu_ref_resurrect+0x116/0x190 [ 19.252265][ T354] bdi_register_owner+0x56/0xf0 [ 19.257098][ T354] __device_add_disk+0x5b3/0x1250 [ 19.262102][ T354] ? device_add_disk+0x30/0x30 [ 19.266889][ T354] ? vsprintf+0x30/0x30 [ 19.271026][ T354] ? device_initialize+0x1d3/0x3e0 [ 19.276163][ T354] ? __alloc_disk_node+0x469/0x5c0 [ 19.281250][ T354] loop_add+0x561/0x720 [ 19.285380][ T354] loop_control_ioctl+0x566/0x7c0 [ 19.290441][ T354] ? xor_init+0x60/0x60 [ 19.294580][ T354] ? xor_init+0x60/0x60 [ 19.298715][ T354] do_vfs_ioctl+0x769/0x1720 [ 19.303286][ T354] ? selinux_file_ioctl+0x72f/0x990 [ 19.308466][ T354] ? ioctl_preallocate+0x250/0x250 [ 19.313556][ T354] ? __fd_install+0x118/0x260 [ 19.318241][ T354] ? do_sys_open+0x62b/0x7b0 [ 19.322807][ T354] ? check_preemption_disabled+0x15a/0x330 [ 19.328587][ T354] ? debug_smp_processor_id+0x20/0x20 [ 19.334050][ T354] ? security_file_ioctl+0xad/0xc0 [ 19.339135][ T354] __x64_sys_ioctl+0xd4/0x110 [ 19.343882][ T354] do_syscall_64+0xcb/0x150 [ 19.348362][ T354] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 19.354229][ T354] RIP: 0033:0x43fec9 [ 19.358110][ T354] 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 bb 46 00 00 c3 66 2e 0f 1f 84 00 00 00 00 [ 19.377692][ T354] RSP: 002b:00007ffe9c5d05f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 19.386082][ T354] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fec9 [ 19.394029][ T354] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 19.402019][ T354] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 19.409966][ T354] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401770 [ 19.417916][ T354] R13: 0000000000401800 R14: 0000000000000000 R15: 0000000000000000 [ 19.426462][ T354] kobject_add_internal failed for 7:0 with -EEXIST, don't try to register things with the same name in the same directory. [ *[0[ 19.439637][ T354] ------------[ cut here ]------------ [ 19.446275][ T354] WARNING: CPU: 0 PID: 354 at block/genhd.c:741 __device_add_disk+0xeb3/0x1250 [ 19.455181][ T354] Kernel panic - not syncing: panic_on_warn set ... [ 19.461746][ T354] CPU: 0 PID: 354 Comm: syz-executor303 Not tainted 5.4.82-syzkaller-00042-gd7ec680881a1 #0 [ 19.471779][ T354] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.481829][ T354] Call Trace: [ 19.485098][ T354] dump_stack+0x1dd/0x24e [ 19.489453][ T354] ? devkmsg_release+0x11c/0x11c [ 19.494370][ T354] ? show_regs_print_info+0x12/0x12 [ 19.499543][ T354] ? vprintk_store+0x690/0x690 [ 19.504286][ T354] ? __device_add_disk+0xdc0/0x1250 [ 19.509462][ T354] ? __device_add_disk+0xdc0/0x1250 [ 19.514645][ T354] panic+0x285/0x750 [ 19.518519][ T354] ? __warn+0xfa/0x200 [ 19.522605][ T354] ? nmi_panic+0x90/0x90 [ 19.526824][ T354] ? devkmsg_release+0x11c/0x11c [ 19.531741][ T354] ? is_valid_bugaddr+0xa0/0x150 [ 19.536657][ T354] ? __device_add_disk+0xeb3/0x1250 [ 19.541835][ T354] __warn+0x1fd/0x200 [ 19.545795][ T354] ? __device_add_disk+0xeb3/0x1250 [ 19.550972][ T354] report_bug+0x390/0x4d0 [ 19.555280][ T354] ? __device_add_disk+0xeb3/0x1250 [ 19.560455][ T354] do_invalid_op+0x6e/0x110 [ 19.564938][ T354] invalid_op+0x1e/0x30 [ 19.569082][ T354] RIP: 0010:__device_add_disk+0xeb3/0x1250 [ 19.574866][ T354] Code: ff e8 21 41 48 ff 0f 0b e9 97 fa ff ff e8 15 41 48 ff 0f 0b e9 df f2 ff ff e8 09 41 48 ff 0f 0b e9 66 f8 ff ff e8 fd 40 48 ff <0f> 0b e9 11 f7 ff ff e8 f1 40 48 ff 43 80 3c 2e 00 0f 85 04 ff ff [ 19.594536][ T354] RSP: 0018:ffff8881e8a3fa00 EFLAGS: 00010293 [ 19.600580][ T354] RAX: ffffffff821aa4f3 RBX: 00000000ffffffef RCX: ffff8881e9970000 [ 19.608532][ T354] RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000 [ 19.616481][ T354] RBP: ffff8881e8a3fb40 R08: ffffffff821a9bfe R09: 0000000000000003 [ 19.624433][ T354] R10: ffffed103d147e4d R11: 0000000000000004 R12: ffff8881e8907000 [ 19.632383][ T354] R13: dffffc0000000000 R14: ffff8881e8907070 R15: 0000000000700000 [ 19.640341][ T354] ? __device_add_disk+0x5be/0x1250 [ 19.645518][ T354] ? __device_add_disk+0xeb3/0x1250 [ 19.650696][ T354] ? device_add_disk+0x30/0x30 [ 19.655439][ T354] ? vsprintf+0x30/0x30 [ 19.659573][ T354] ? device_initialize+0x1d3/0x3e0 [ 19.664696][ T354] ? __alloc_disk_node+0x469/0x5c0 [ 19.669784][ T354] loop_add+0x561/0x720 [ 19.673920][ T354] loop_control_ioctl+0x566/0x7c0 [ 19.678920][ T354] ? xor_init+0x60/0x60 [ 19.683058][ T354] ? xor_init+0x60/0x60 [ 19.687191][ T354] do_vfs_ioctl+0x769/0x1720 [ 19.691760][ T354] ? selinux_file_ioctl+0x72f/0x990 [ 19.696937][ T354] ? ioctl_preallocate+0x250/0x250 [ 19.702028][ T354] ? __fd_install+0x118/0x260 [ 19.706682][ T354] ? do_sys_open+0x62b/0x7b0 [ 19.711248][ T354] ? check_preemption_disabled+0x15a/0x330 [ 19.717029][ T354] ? debug_smp_processor_id+0x20/0x20 [ 19.722381][ T354] ? security_file_ioctl+0xad/0xc0 [ 19.727519][ T354] __x64_sys_ioctl+0xd4/0x110 [ 19.732170][ T354] do_syscall_64+0xcb/0x150 [ 19.736691][ T354] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 19.742564][ T354] RIP: 0033:0x43fec9 [ 19.746438][ T354] 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 bb 46 00 00 c3 66 2e 0f 1f 84 00 00 00 00 [ 19.766017][ T354] RSP: 002b:00007ffe9c5d05f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 19.774405][ T354] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fec9 [ 19.782358][ T354] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 19.790310][ T354] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 19.798260][ T354] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401770 [ 19.806210][ T354] R13: 0000000000401800 R14: 0000000000000000 R15: 0000000000000000 [ 19.814947][ T354] Kernel Offset: disabled [ 19.819324][ T354] Rebooting in 86400 seconds..