Warning: Permanently added '[localhost]:48679' (ED25519) to the list of known hosts. executing program syzkaller login: [ 78.974278][ T5305] loop0: detected capacity change from 0 to 256 [ 79.008185][ T5305] exFAT-fs (loop0): failed to load upcase table (idx : 0x0000fd4f, chksum : 0x3963664b, utbl_chksum : 0xe619d30d) [ 79.061251][ T5305] loop0: detected capacity change from 256 to 64 [ 79.064503][ T5305] [ 79.065648][ T5305] ====================================================== [ 79.068529][ T5305] WARNING: possible circular locking dependency detected [ 79.071220][ T5305] 6.15.0-rc5-syzkaller-00197-gea34704d6ad7 #0 Not tainted [ 79.073997][ T5305] ------------------------------------------------------ [ 79.076658][ T5305] syz-executor852/5305 is trying to acquire lock: [ 79.079217][ T5305] ffffffff8f657a08 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast+0x27e/0x560 [ 79.083682][ T5305] [ 79.083682][ T5305] but task is already holding lock: [ 79.087605][ T5305] ffff888033b09de8 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 79.092008][ T5305] [ 79.092008][ T5305] which lock already depends on the new lock. [ 79.092008][ T5305] [ 79.096393][ T5305] [ 79.096393][ T5305] the existing dependency chain (in reverse order) is: [ 79.100254][ T5305] [ 79.100254][ T5305] -> #2 (&q->q_usage_counter(io)#17){++++}-{0:0}: [ 79.103786][ T5305] lock_acquire+0x120/0x360 [ 79.105624][ T5305] blk_alloc_queue+0x538/0x620 [ 79.107451][ T5305] __blk_mq_alloc_disk+0x164/0x350 [ 79.109504][ T5305] loop_add+0x41d/0xae0 [ 79.111300][ T5305] loop_init+0x173/0x230 [ 79.113281][ T5305] do_one_initcall+0x233/0x820 [ 79.115531][ T5305] do_initcall_level+0x137/0x1f0 [ 79.117906][ T5305] do_initcalls+0x69/0xd0 [ 79.120014][ T5305] kernel_init_freeable+0x3d9/0x570 [ 79.122575][ T5305] kernel_init+0x1d/0x1d0 [ 79.124671][ T5305] ret_from_fork+0x4b/0x80 [ 79.126703][ T5305] ret_from_fork_asm+0x1a/0x30 [ 79.129008][ T5305] [ 79.129008][ T5305] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 79.131922][ T5305] lock_acquire+0x120/0x360 [ 79.134194][ T5305] fs_reclaim_acquire+0x72/0x100 [ 79.136444][ T5305] kmem_cache_alloc_node_noprof+0x47/0x3c0 [ 79.139019][ T5305] __alloc_skb+0x112/0x2d0 [ 79.141075][ T5305] alloc_uevent_skb+0x7d/0x230 [ 79.143247][ T5305] kobject_uevent_net_broadcast+0x2fa/0x560 [ 79.146063][ T5305] kobject_uevent_env+0x55b/0x8c0 [ 79.148469][ T5305] kobject_synth_uevent+0x527/0xb00 [ 79.150914][ T5305] bus_uevent_store+0x115/0x170 [ 79.152981][ T5305] kernfs_fop_write_iter+0x375/0x4f0 [ 79.155177][ T5305] vfs_write+0x548/0xa90 [ 79.157030][ T5305] ksys_write+0x145/0x250 [ 79.158976][ T5305] do_syscall_64+0xf6/0x210 [ 79.160949][ T5305] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.163414][ T5305] [ 79.163414][ T5305] -> #0 (uevent_sock_mutex){+.+.}-{4:4}: [ 79.166429][ T5305] validate_chain+0xb9b/0x2140 [ 79.168731][ T5305] __lock_acquire+0xaac/0xd20 [ 79.170937][ T5305] lock_acquire+0x120/0x360 [ 79.173137][ T5305] __mutex_lock+0x182/0xe80 [ 79.175299][ T5305] kobject_uevent_net_broadcast+0x27e/0x560 [ 79.178095][ T5305] kobject_uevent_env+0x55b/0x8c0 [ 79.180675][ T5305] set_capacity_and_notify+0x26d/0x2d0 [ 79.183285][ T5305] loop_set_status+0x459/0xaf0 [ 79.185444][ T5305] lo_ioctl+0xa5d/0x2410 [ 79.187513][ T5305] blkdev_ioctl+0x5a5/0x6d0 [ 79.189740][ T5305] __se_sys_ioctl+0xf9/0x170 [ 79.191882][ T5305] do_syscall_64+0xf6/0x210 [ 79.193967][ T5305] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.196619][ T5305] [ 79.196619][ T5305] other info that might help us debug this: [ 79.196619][ T5305] [ 79.201048][ T5305] Chain exists of: [ 79.201048][ T5305] uevent_sock_mutex --> fs_reclaim --> &q->q_usage_counter(io)#17 [ 79.201048][ T5305] [ 79.206798][ T5305] Possible unsafe locking scenario: [ 79.206798][ T5305] [ 79.209808][ T5305] CPU0 CPU1 [ 79.212024][ T5305] ---- ---- [ 79.214251][ T5305] lock(&q->q_usage_counter(io)#17); [ 79.216536][ T5305] lock(fs_reclaim); [ 79.219271][ T5305] lock(&q->q_usage_counter(io)#17); [ 79.222640][ T5305] lock(uevent_sock_mutex); [ 79.225013][ T5305] [ 79.225013][ T5305] *** DEADLOCK *** [ 79.225013][ T5305] [ 79.228330][ T5305] 3 locks held by syz-executor852/5305: [ 79.230757][ T5305] #0: ffff888032e16368 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_set_status+0x2a/0xaf0 [ 79.234745][ T5305] #1: ffff888033b09de8 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 79.238890][ T5305] #2: ffff888033b09e20 (&q->q_usage_counter(queue)#20){+.+.}-{0:0}, at: loop_set_status+0x225/0xaf0 [ 79.243102][ T5305] [ 79.243102][ T5305] stack backtrace: [ 79.245393][ T5305] CPU: 0 UID: 0 PID: 5305 Comm: syz-executor852 Not tainted 6.15.0-rc5-syzkaller-00197-gea34704d6ad7 #0 PREEMPT(full) [ 79.245407][ T5305] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 79.245414][ T5305] Call Trace: [ 79.245421][ T5305] [ 79.245426][ T5305] dump_stack_lvl+0x189/0x250 [ 79.245443][ T5305] ? __pfx_dump_stack_lvl+0x10/0x10 [ 79.245452][ T5305] ? __pfx__printk+0x10/0x10 [ 79.245459][ T5305] ? print_lock_name+0xde/0x100 [ 79.245468][ T5305] print_circular_bug+0x2ee/0x310 [ 79.245477][ T5305] check_noncircular+0x134/0x160 [ 79.245491][ T5305] validate_chain+0xb9b/0x2140 [ 79.245500][ T5305] ? number+0xd18/0xf60 [ 79.245518][ T5305] __lock_acquire+0xaac/0xd20 [ 79.245532][ T5305] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 79.245545][ T5305] lock_acquire+0x120/0x360 [ 79.245557][ T5305] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 79.245573][ T5305] __mutex_lock+0x182/0xe80 [ 79.245582][ T5305] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 79.245593][ T5305] ? vsnprintf+0xe11/0xf00 [ 79.245602][ T5305] ? kobject_uevent_net_broadcast+0x27e/0x560 [ 79.245611][ T5305] ? __pfx___mutex_lock+0x10/0x10 [ 79.245618][ T5305] ? add_uevent_var+0x278/0x450 [ 79.245627][ T5305] ? kobject_uevent_env+0x50a/0x8c0 [ 79.245635][ T5305] ? __pfx_add_uevent_var+0x10/0x10 [ 79.245644][ T5305] kobject_uevent_net_broadcast+0x27e/0x560 [ 79.245654][ T5305] kobject_uevent_env+0x55b/0x8c0 [ 79.245663][ T5305] set_capacity_and_notify+0x26d/0x2d0 [ 79.245674][ T5305] ? __pfx_set_capacity_and_notify+0x10/0x10 [ 79.245686][ T5305] ? loop_set_status_from_info+0x185/0x250 [ 79.245699][ T5305] loop_set_status+0x459/0xaf0 [ 79.245712][ T5305] lo_ioctl+0xa5d/0x2410 [ 79.245723][ T5305] ? arch_stack_walk+0xfc/0x150 [ 79.245738][ T5305] ? __pfx_lo_ioctl+0x10/0x10 [ 79.245748][ T5305] ? stack_trace_save+0x9c/0xe0 [ 79.245760][ T5305] ? stack_depot_save_flags+0x40/0x910 [ 79.245770][ T5305] ? __lock_acquire+0xaac/0xd20 [ 79.245784][ T5305] ? __lock_acquire+0xaac/0xd20 [ 79.245798][ T5305] ? is_bpf_text_address+0x26/0x2b0 [ 79.245816][ T5305] ? __lock_acquire+0xaac/0xd20 [ 79.245830][ T5305] ? is_bpf_text_address+0x26/0x2b0 [ 79.245843][ T5305] ? is_bpf_text_address+0x292/0x2b0 [ 79.245855][ T5305] ? is_bpf_text_address+0x26/0x2b0 [ 79.245868][ T5305] ? kernel_text_address+0xa5/0xe0 [ 79.245881][ T5305] ? __kernel_text_address+0xd/0x40 [ 79.245892][ T5305] ? unwind_get_return_address+0x4d/0x90 [ 79.245900][ T5305] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 79.245907][ T5305] ? arch_stack_walk+0xfc/0x150 [ 79.245915][ T5305] ? stack_trace_save+0x9c/0xe0 [ 79.245922][ T5305] ? stack_depot_save_flags+0x40/0x910 [ 79.245929][ T5305] ? kasan_save_track+0x4f/0x80 [ 79.245936][ T5305] ? kasan_save_track+0x3e/0x80 [ 79.245942][ T5305] ? do_vfs_ioctl+0xf36/0x1eb0 [ 79.245948][ T5305] ? __se_sys_ioctl+0x47/0x170 [ 79.245954][ T5305] ? do_syscall_64+0xf6/0x210 [ 79.245962][ T5305] ? __pfx_do_vfs_ioctl+0x10/0x10 [ 79.245972][ T5305] ? kasan_quarantine_put+0xdd/0x220 [ 79.245979][ T5305] ? blkdev_common_ioctl+0xfc3/0x2450 [ 79.245986][ T5305] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 79.245996][ T5305] ? __pfx_blkdev_common_ioctl+0x10/0x10 [ 79.246002][ T5305] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 79.246016][ T5305] ? tomoyo_path_number_perm+0x4e2/0x5a0 [ 79.246029][ T5305] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 79.246042][ T5305] ? __pfx_tomoyo_path_number_perm+0x10/0x10 [ 79.246058][ T5305] ? count_memcg_event_mm+0x92/0x3b0 [ 79.246070][ T5305] ? count_memcg_event_mm+0x92/0x3b0 [ 79.246083][ T5305] ? __pfx_lo_ioctl+0x10/0x10 [ 79.246094][ T5305] blkdev_ioctl+0x5a5/0x6d0 [ 79.246101][ T5305] ? __pfx_blkdev_ioctl+0x10/0x10 [ 79.246109][ T5305] ? bpf_lsm_file_ioctl+0x9/0x20 [ 79.246116][ T5305] ? __pfx_blkdev_ioctl+0x10/0x10 [ 79.246123][ T5305] __se_sys_ioctl+0xf9/0x170 [ 79.246129][ T5305] do_syscall_64+0xf6/0x210 [ 79.246139][ T5305] ? clear_bhb_loop+0x45/0xa0 [ 79.246150][ T5305] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.246159][ T5305] RIP: 0033:0x7fe2ed63fbd9 [ 79.246170][ T5305] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 79.246178][ T5305] RSP: 002b:00007ffe4921f408 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 79.246188][ T5305] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe2ed63fbd9 [ 79.246195][ T5305] RDX: 00002000000007c0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 79.246200][ T5305] RBP: 00007fe2ed6b45f0 R08: 0000555581e584c0 R09: 0000555581e584c0 [ 79.246207][ T5305] R10: 0000555581e584c0 R11: 0000000000000246 R12: 00007ffe4921f430 [ 79.246213][ T5305] R13: 00007ffe4921f658 R14: 431bde82d7b634db R15: 00007fe2ed68803b [ 79.246223][ T5305] [ 79.451567][ T5305] loop0: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 86.711062][ T10] cfg80211: failed to load regulatory.db executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program VM DIAGNOSIS: 04:49:06 Registers: info registers vcpu 0 CPU#0 RAX=0000000000000020 RBX=0000000000000020 RCX=0000000000000000 RDX=00000000000003f8 RSI=0000000000000000 RDI=0000000000000020 RBP=00000000000003f8 RSP=ffffc9000d4ee550 R8 =ffff88801fdd0237 R9 =1ffff11003fba046 R10=dffffc0000000000 R11=ffffffff853db370 R12=dffffc0000000000 R13=ffffffff99846c50 R14=ffffffff99b4bbc0 R15=0000000000000000 RIP=ffffffff853db3ec 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 0000555581e57380 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=0000556febafe2c0 CR3=0000000043615000 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=0000000000440401 Opmask01=0000000000000001 Opmask02=00000000fff7ffff Opmask03=0000000000000000 Opmask04=0000000000000000 Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000 ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007ffe4921f410 0000003000000018 ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007fe2ed6c0580 00007fe2ed6b45d8 ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007fe2ed6a5824 00007fe2ed6b9260 ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 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 2525252525252525 2525252525252525 2525252525252525 2525252525252525 ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 65723d73726f7272 6500747865003036 36396f7369007265 6c6c616b7a797300 ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 40571856574a5757 4000515d40001513 131c4a564c005740 4949444e5f5c5600 ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 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