Warning: Permanently added '[localhost]:11767' (ED25519) to the list of known hosts. executing program [ 77.754427][ T5302] loop0: detected capacity change from 0 to 256 [ 77.807669][ T5302] loop0: detected capacity change from 256 to 255 [ 77.810836][ T5302] [ 77.811990][ T5302] ====================================================== [ 77.814960][ T5302] WARNING: possible circular locking dependency detected [ 77.817914][ T5302] 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 Not tainted [ 77.821571][ T5302] ------------------------------------------------------ [ 77.824382][ T5302] syz-executor256/5302 is trying to acquire lock: [ 77.827019][ T5302] ffffffff8f657d08 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast+0x27e/0x560 [ 77.831450][ T5302] [ 77.831450][ T5302] but task is already holding lock: [ 77.834386][ T5302] ffff888034021de8 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 77.838595][ T5302] [ 77.838595][ T5302] which lock already depends on the new lock. [ 77.838595][ T5302] [ 77.842909][ T5302] [ 77.842909][ T5302] the existing dependency chain (in reverse order) is: [ 77.846560][ T5302] [ 77.846560][ T5302] -> #2 (&q->q_usage_counter(io)#17){++++}-{0:0}: [ 77.850171][ T5302] lock_acquire+0x120/0x360 [ 77.852348][ T5302] blk_alloc_queue+0x538/0x620 [ 77.854587][ T5302] __blk_mq_alloc_disk+0x164/0x350 [ 77.856961][ T5302] loop_add+0x41d/0xae0 [ 77.858997][ T5302] loop_init+0x173/0x230 [ 77.861024][ T5302] do_one_initcall+0x233/0x820 [ 77.863236][ T5302] do_initcall_level+0x137/0x1f0 [ 77.865626][ T5302] do_initcalls+0x69/0xd0 [ 77.867684][ T5302] kernel_init_freeable+0x3d9/0x570 [ 77.870208][ T5302] kernel_init+0x1d/0x1d0 [ 77.872231][ T5302] ret_from_fork+0x4b/0x80 [ 77.874323][ T5302] ret_from_fork_asm+0x1a/0x30 [ 77.876315][ T5302] [ 77.876315][ T5302] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 77.879413][ T5302] lock_acquire+0x120/0x360 [ 77.881484][ T5302] fs_reclaim_acquire+0x72/0x100 [ 77.883713][ T5302] kmem_cache_alloc_node_noprof+0x47/0x3c0 [ 77.887109][ T5302] __alloc_skb+0x112/0x2d0 [ 77.889639][ T5302] alloc_uevent_skb+0x7d/0x230 [ 77.892374][ T5302] kobject_uevent_net_broadcast+0x2fa/0x560 [ 77.895649][ T5302] kobject_uevent_env+0x55b/0x8c0 [ 77.898402][ T5302] kobject_synth_uevent+0x527/0xb00 [ 77.900790][ T5302] bus_uevent_store+0x115/0x170 [ 77.903214][ T5302] kernfs_fop_write_iter+0x375/0x4f0 [ 77.905771][ T5302] vfs_write+0x548/0xa90 [ 77.907844][ T5302] ksys_write+0x145/0x250 [ 77.909958][ T5302] do_syscall_64+0xf6/0x210 [ 77.912251][ T5302] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.914933][ T5302] [ 77.914933][ T5302] -> #0 (uevent_sock_mutex){+.+.}-{4:4}: [ 77.918283][ T5302] validate_chain+0xb9b/0x2140 [ 77.920566][ T5302] __lock_acquire+0xaac/0xd20 [ 77.922799][ T5302] lock_acquire+0x120/0x360 [ 77.924969][ T5302] __mutex_lock+0x182/0xe80 [ 77.927128][ T5302] kobject_uevent_net_broadcast+0x27e/0x560 [ 77.929895][ T5302] kobject_uevent_env+0x55b/0x8c0 [ 77.932281][ T5302] set_capacity_and_notify+0x26d/0x2d0 [ 77.934776][ T5302] loop_set_status+0x459/0xaf0 [ 77.937036][ T5302] lo_ioctl+0xb41/0x22e0 [ 77.939053][ T5302] blkdev_ioctl+0x5a5/0x6d0 [ 77.941041][ T5302] __se_sys_ioctl+0xf9/0x170 [ 77.943134][ T5302] do_syscall_64+0xf6/0x210 [ 77.945272][ T5302] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.948019][ T5302] [ 77.948019][ T5302] other info that might help us debug this: [ 77.948019][ T5302] [ 77.952273][ T5302] Chain exists of: [ 77.952273][ T5302] uevent_sock_mutex --> fs_reclaim --> &q->q_usage_counter(io)#17 [ 77.952273][ T5302] [ 77.958126][ T5302] Possible unsafe locking scenario: [ 77.958126][ T5302] [ 77.961425][ T5302] CPU0 CPU1 [ 77.963805][ T5302] ---- ---- [ 77.966108][ T5302] lock(&q->q_usage_counter(io)#17); [ 77.968435][ T5302] lock(fs_reclaim); [ 77.971254][ T5302] lock(&q->q_usage_counter(io)#17); [ 77.974589][ T5302] lock(uevent_sock_mutex); [ 77.976593][ T5302] [ 77.976593][ T5302] *** DEADLOCK *** [ 77.976593][ T5302] [ 77.979989][ T5302] 3 locks held by syz-executor256/5302: [ 77.982418][ T5302] #0: ffff888033d32368 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_set_status+0x2a/0xaf0 [ 77.986431][ T5302] #1: ffff888034021de8 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 77.990854][ T5302] #2: ffff888034021e20 (&q->q_usage_counter(queue)#20){+.+.}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 77.995430][ T5302] [ 77.995430][ T5302] stack backtrace: [ 77.997953][ T5302] CPU: 0 UID: 0 PID: 5302 Comm: syz-executor256 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full) [ 77.997966][ T5302] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 77.997973][ T5302] Call Trace: [ 77.997980][ T5302] [ 77.997985][ T5302] dump_stack_lvl+0x189/0x250 [ 77.998003][ T5302] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.998017][ T5302] ? __pfx__printk+0x10/0x10 [ 77.998027][ T5302] ? print_lock_name+0xde/0x100 [ 77.998042][ T5302] print_circular_bug+0x2ee/0x310 [ 77.998052][ T5302] check_noncircular+0x134/0x160 [ 77.998062][ T5302] validate_chain+0xb9b/0x2140 [ 77.998070][ T5302] ? number+0xd18/0xf60 [ 77.998088][ T5302] __lock_acquire+0xaac/0xd20 [ 77.998102][ T5302] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 77.998114][ T5302] lock_acquire+0x120/0x360 [ 77.998126][ T5302] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 77.998141][ T5302] __mutex_lock+0x182/0xe80 [ 77.998154][ T5302] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 77.998167][ T5302] ? vsnprintf+0xe11/0xf00 [ 77.998180][ T5302] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 77.998193][ T5302] ? __pfx___mutex_lock+0x10/0x10 [ 77.998202][ T5302] ? add_uevent_var+0x278/0x450 [ 77.998215][ T5302] ? kobject_uevent_env+0x50a/0x8c0 [ 77.998228][ T5302] ? __pfx_add_uevent_var+0x10/0x10 [ 77.998241][ T5302] kobject_uevent_net_broadcast+0x27e/0x560 [ 77.998255][ T5302] kobject_uevent_env+0x55b/0x8c0 [ 77.998269][ T5302] set_capacity_and_notify+0x26d/0x2d0 [ 77.998282][ T5302] ? __pfx_set_capacity_and_notify+0x10/0x10 [ 77.998294][ T5302] ? loop_set_status_from_info+0x185/0x250 [ 77.998308][ T5302] loop_set_status+0x459/0xaf0 [ 77.998326][ T5302] lo_ioctl+0xb41/0x22e0 [ 77.998337][ T5302] ? arch_stack_walk+0xfc/0x150 [ 77.998351][ T5302] ? __pfx_lo_ioctl+0x10/0x10 [ 77.998361][ T5302] ? stack_trace_save+0x9c/0xe0 [ 77.998372][ T5302] ? stack_depot_save_flags+0x40/0x910 [ 77.998382][ T5302] ? __lock_acquire+0xaac/0xd20 [ 77.998396][ T5302] ? __lock_acquire+0xaac/0xd20 [ 77.998411][ T5302] ? is_bpf_text_address+0x26/0x2b0 [ 77.998429][ T5302] ? __lock_acquire+0xaac/0xd20 [ 77.998444][ T5302] ? is_bpf_text_address+0x26/0x2b0 [ 77.998460][ T5302] ? is_bpf_text_address+0x292/0x2b0 [ 77.998472][ T5302] ? is_bpf_text_address+0x26/0x2b0 [ 77.998484][ T5302] ? kernel_text_address+0xa5/0xe0 [ 77.998497][ T5302] ? __kernel_text_address+0xd/0x40 [ 77.998508][ T5302] ? unwind_get_return_address+0x4d/0x90 [ 77.998521][ T5302] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 77.998530][ T5302] ? arch_stack_walk+0xfc/0x150 [ 77.998543][ T5302] ? stack_trace_save+0x9c/0xe0 [ 77.998553][ T5302] ? stack_depot_save_flags+0x40/0x910 [ 77.998563][ T5302] ? kasan_save_track+0x4f/0x80 [ 77.998573][ T5302] ? kasan_save_track+0x3e/0x80 [ 77.998583][ T5302] ? do_vfs_ioctl+0xf36/0x1eb0 [ 77.998591][ T5302] ? __se_sys_ioctl+0x47/0x170 [ 77.998600][ T5302] ? do_syscall_64+0xf6/0x210 [ 77.998611][ T5302] ? __pfx_do_vfs_ioctl+0x10/0x10 [ 77.998625][ T5302] ? kasan_quarantine_put+0xdd/0x220 [ 77.998636][ T5302] ? blkdev_common_ioctl+0xfc3/0x2450 [ 77.998646][ T5302] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 77.998661][ T5302] ? __pfx_blkdev_common_ioctl+0x10/0x10 [ 77.998671][ T5302] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 77.998684][ T5302] ? tomoyo_path_number_perm+0x4e2/0x5a0 [ 77.998696][ T5302] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 77.998709][ T5302] ? __pfx_tomoyo_path_number_perm+0x10/0x10 [ 77.998726][ T5302] ? kasan_quarantine_put+0xdd/0x220 [ 77.998734][ T5302] ? lockdep_hardirqs_on+0x9c/0x150 [ 77.998745][ T5302] ? __pfx_lo_ioctl+0x10/0x10 [ 77.998756][ T5302] blkdev_ioctl+0x5a5/0x6d0 [ 77.998766][ T5302] ? __pfx_blkdev_ioctl+0x10/0x10 [ 77.998778][ T5302] ? bpf_lsm_file_ioctl+0x9/0x20 [ 77.998790][ T5302] ? __pfx_blkdev_ioctl+0x10/0x10 [ 77.998799][ T5302] __se_sys_ioctl+0xf9/0x170 [ 77.998809][ T5302] do_syscall_64+0xf6/0x210 [ 77.998818][ T5302] ? clear_bhb_loop+0x45/0xa0 [ 77.998825][ T5302] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.998832][ T5302] RIP: 0033:0x7fb27b0c0839 [ 77.998840][ T5302] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 77.998845][ T5302] RSP: 002b:00007fffb0b97d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 77.998852][ T5302] RAX: ffffffffffffffda RBX: 0000008000000000 RCX: 00007fb27b0c0839 [ 77.998858][ T5302] RDX: 00002000000007c0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 77.998864][ T5302] RBP: 00007fb27b134610 R08: 0000000000000000 R09: 00007fffb0b97f78 [ 77.998869][ T5302] R10: 00007fb27b1266e4 R11: 0000000000000246 R12: 0000000000000001 [ 77.998875][ T5302] R13: 00007fffb0b97f68 R14: 0000200000000040 R15: 0000200000000044 [ 77.998883][ T5302] [ 86.697863][ T57] cfg80211: failed to load regulatory.db VM DIAGNOSIS: 18:03:08 Registers: info registers vcpu 0 CPU#0 RAX=000000000000002d RBX=000000000000002d RCX=0000000000000000 RDX=00000000000003f8 RSI=0000000000000000 RDI=0000000000000020 RBP=00000000000003f8 RSP=ffffc9000d2ae550 R8 =ffff88801c3b0237 R9 =1ffff11003876046 R10=dffffc0000000000 R11=ffffffff853d83b0 R12=dffffc0000000000 R13=ffffffff99846c62 R14=ffffffff99b4bbc0 R15=0000000000000000 RIP=ffffffff853d842c RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000555564e9b380 ffffffff 00c00000 GS =0000 ffff88808d6cc000 ffffffff 00c00000 LDT=0000 0000000000000000 ffffffff 00c00000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fffd1c16dd8 CR3=0000000041731000 CR4=00352ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 Opmask00=000000001003e004 Opmask01=0000000000010000 Opmask02=00000000fffffdff Opmask03=0000000000000000 Opmask04=00000000ffffffff Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000 ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 4b5f5455504e495f 4449006b636f6c62 ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007fffd1c178f0 0000003000000018 ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2a2a2a2a2a2a2a2a 2a2a2a2a2a2a2a2a ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffffffffff000000 0000000000000000 ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffff000000000000 ffffff00ffffff00 ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffffffffff000000 0000000000000000 ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 73202c297325286b 636f6c66206f7420 656c62616e55006e 6f69746974726170 ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 6f6f742079617272 6120656c75722079 7261726f706d6574 002a3f005b3f2a00 ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4a4a51055c445757 440540495057055c 5744574a55484051 000f1a005b1a0f00 ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000000000a5 00000000000000e6 00000000000000e1 0000000000000000 ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007f9542a46b00 000055fb0f86c7dc 0000000000000021 0000000000007374 ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2648383a3a26483b 3a0a00307f617930 382433273f397b27 697a787c69303b7e ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 3a323a3a264c3d3a 3a26333d3a3a263c 3d3a3a263f3d3a3a 263e3d3a3a26383d ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 692054524f50202c 2064696c61696d20 0070253a20252054 524f504d49005452 ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 692020520050202c 2025204f504d4900 0061253a20252000 2527204d49005452 ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000