program: r0 = socket$inet6(0xa, 0x2, 0x3a) r1 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a) syz_mount_image$ext4(&(0x7f0000000740)='ext4\x00', &(0x7f0000000100)='./mnt\x00', 0x3200d4, &(0x7f0000000040)={[{@jqfmt_vfsv1}, {@block_validity}]}, 0x1, 0x243, &(0x7f0000000840)="$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") r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000540)='pids.events\x00', 0x275a, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) mkdir(&(0x7f0000000100)='./sys_mount\x00', 0x1ff) mount(0x0, &(0x7f0000000180)='./sys_mount\x00', &(0x7f00000001c0)='sysfs\x00', 0x0, 0x0) r3 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./sys_mount/block/loop0/queue/scheduler\x00', 0x2, 0x0) bpf$PROG_LOAD(0x5, &(0x7f0000002c40)={0x15, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @sk_reuseport=0x28, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffff}, 0x94) fsopen(&(0x7f00000000c0)='securityfs\x00', 0x1) write(r3, &(0x7f0000000300)='bfq', 0x3) perf_event_open(&(0x7f00000003c0)={0x2, 0x80, 0x6d, 0xd, 0x0, 0x0, 0x0, 0x0, 0x5048, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, @perf_config_ext={0x2, 0x8001}, 0x102909, 0x3, 0x1, 0x0, 0x80020000, 0x0, 0x7, 0x0, 0x0, 0x0, 0x4}, 0x0, 0xfffffaffffffffff, 0xffffffffffffffff, 0xa) r4 = socket$inet6_tcp(0xa, 0x1, 0x0) bind$inet6(r4, &(0x7f0000d84000)={0xa, 0x2, 0x0, @rand_addr, 0xffffffff}, 0x1c) sendto$inet6(r4, &(0x7f0000f6f000), 0xfffffffffffffea7, 0x20000004, &(0x7f0000b63fe4)={0xa, 0x2, 0x18115, @rand_addr, 0x983a}, 0x1c) r5 = socket$inet6_sctp(0xa, 0x1, 0x84) setsockopt(r5, 0x84, 0x80, &(0x7f00000002c0)="1a00000002000000", 0x8) syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000c80)='./file1\x00', 0x210000, &(0x7f0000000980)={[{@jqfmt_vfsv1}, {}, {@barrier_val}, {@norecovery}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x80}}, {@resuid}, {@nodelalloc}, {@acl}, {@noinit_itable}]}, 0xfc, 0x572, &(0x7f0000003780)="$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") r6 = add_key$keyring(&(0x7f00000006c0), &(0x7f0000000700)={'syz', 0x3}, 0x0, 0x0, 0xfffffffffffffffc) add_key$user(&(0x7f0000000240), &(0x7f0000000280)={'syz', 0x0}, &(0x7f00000005c0)="853230fe387572e0544b53a673d6203935e3c9d621a8ca4059a7144c2a655fd33fc0b19b479e0b4ea937158d0ea4bc546bb6cf46e1f2434dabd97631605c71873caabccfc64d283a824cd9a2e13e6154873275a28fa79512314a66ca5ca847cef3bbe40e7f269116830686842b2ccbef8b979677b73500331c76661a8b1a64b224a8f3c70705dc777cef608a85147e62cb648852ab0979e0b23f184ed313589078091ae195bb1fab88ab4ea8ecaaa8445ddd9790b4631bed2eb84d2d6917194b1d3a66a06a1217d043dd26", 0xcb, r6) mount$9p_virtio(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', &(0x7f0000000140), 0x8, 0x0) chdir(&(0x7f0000000380)='./file0\x00') link(&(0x7f0000000200)='./file1\x00', &(0x7f0000000300)='./bus\x00') setsockopt$inet_sctp_SCTP_SOCKOPT_BINDX_ADD(r5, 0x84, 0x64, &(0x7f0000000040)=[@in6={0xa, 0x4e23, 0x0, @loopback}], 0x1c) sendto$inet6(r5, &(0x7f0000000100)="ea", 0xff82, 0x0, &(0x7f0000000000)={0xa, 0x4e23, 0x0, @loopback}, 0x1c) r7 = syz_genetlink_get_family_id$devlink(&(0x7f0000000200), r3) sendmsg$DEVLINK_CMD_PORT_UNSPLIT(r2, &(0x7f0000000580)={&(0x7f0000000140)={0x10, 0x0, 0x0, 0x80000000}, 0xc, &(0x7f0000000500)={&(0x7f0000000340)=ANY=[@ANYBLOB="94010000", @ANYRES16=r7, @ANYBLOB="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"], 0x194}, 0x1, 0x0, 0x0, 0x44}, 0x0) write$binfmt_script(r2, &(0x7f0000000000), 0x208e24b) ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000040)={'veth1_to_bridge\x00'}) setsockopt$inet6_int(r0, 0x29, 0x5, &(0x7f0000000000)=0xfbb7, 0x4) [ 93.807595][ T5320] loop0: detected capacity change from 0 to 128 [ 93.822384][ T4642] Bluetooth: hci0: command tx timeout [ 93.889960][ T5320] [ 93.891074][ T5320] ====================================================== [ 93.894058][ T5320] WARNING: possible circular locking dependency detected [ 93.897000][ T5320] syzkaller #0 Not tainted [ 93.898984][ T5320] ------------------------------------------------------ [ 93.901860][ T5320] syz.0.0/5320 is trying to acquire lock: [ 93.904131][ T5320] ffffffff8ec61160 (pcpu_alloc_mutex){+.+.}-{4:4}, at: pcpu_alloc_noprof+0x231/0x1900 [ 93.907872][ T5320] [ 93.907872][ T5320] but task is already holding lock: [ 93.910831][ T5320] ffff888034b0c6b8 (&q->elevator_lock){+.+.}-{4:4}, at: elevator_change+0x1af/0x480 [ 93.914527][ T5320] [ 93.914527][ T5320] which lock already depends on the new lock. [ 93.914527][ T5320] [ 93.918580][ T5320] [ 93.918580][ T5320] the existing dependency chain (in reverse order) is: [ 93.922077][ T5320] [ 93.922077][ T5320] -> #3 (&q->elevator_lock){+.+.}-{4:4}: [ 93.925353][ T5320] __mutex_lock+0x19d/0x1550 [ 93.927699][ T5320] elevator_change+0x1af/0x480 [ 93.930078][ T5320] elv_iosched_store+0x504/0x630 [ 93.932460][ T5320] queue_attr_store+0x207/0x2b0 [ 93.934823][ T5320] kernfs_fop_write_iter+0x3a4/0x540 [ 93.937393][ T5320] vfs_write+0x612/0xba0 [ 93.939514][ T5320] ksys_write+0x150/0x270 [ 93.941704][ T5320] do_syscall_64+0x174/0x580 [ 93.943945][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.946740][ T5320] [ 93.946740][ T5320] -> #2 (&q->q_usage_counter(io)#17){++++}-{0:0}: [ 93.950457][ T5320] blk_alloc_queue+0x544/0x690 [ 93.952822][ T5320] __blk_mq_alloc_disk+0x194/0x390 [ 93.955273][ T5320] loop_add+0x480/0xb40 [ 93.957373][ T5320] loop_init+0xd7/0x160 [ 93.959573][ T5320] do_one_initcall+0x250/0x870 [ 93.961959][ T5320] do_initcall_level+0x10a/0x1a0 [ 93.964324][ T5320] do_initcalls+0x59/0xa0 [ 93.966470][ T5320] kernel_init_freeable+0x29d/0x3e0 [ 93.969019][ T5320] kernel_init+0x1d/0x1d0 [ 93.971203][ T5320] ret_from_fork+0x514/0xb70 [ 93.973412][ T5320] ret_from_fork_asm+0x1a/0x30 [ 93.975829][ T5320] [ 93.975829][ T5320] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 93.979005][ T5320] fs_reclaim_acquire+0x71/0x100 [ 93.981275][ T5320] prepare_alloc_pages+0x15b/0x650 [ 93.983793][ T5320] __alloc_frozen_pages_noprof+0x12f/0x380 [ 93.986612][ T5320] __alloc_pages_noprof+0x10/0x100 [ 93.989076][ T5320] pcpu_populate_chunk+0x181/0xb30 [ 93.991486][ T5320] pcpu_alloc_noprof+0xbca/0x1900 [ 93.993891][ T5320] iommu_dma_init_fq+0x2d3/0x700 [ 93.996256][ T5320] iommu_setup_dma_ops+0x6e5/0x1820 [ 93.998710][ T5320] bus_iommu_probe+0x296/0x470 [ 94.001111][ T5320] iommu_device_register+0x1af/0x210 [ 94.003677][ T5320] intel_iommu_init+0x6f0/0x8e0 [ 94.005913][ T5320] pci_iommu_init+0x38/0x70 [ 94.007992][ T5320] do_one_initcall+0x250/0x870 [ 94.010326][ T5320] do_initcall_level+0x10a/0x1a0 [ 94.012692][ T5320] do_initcalls+0x59/0xa0 [ 94.014760][ T5320] kernel_init_freeable+0x29d/0x3e0 [ 94.017140][ T5320] kernel_init+0x1d/0x1d0 [ 94.019287][ T5320] ret_from_fork+0x514/0xb70 [ 94.021491][ T5320] ret_from_fork_asm+0x1a/0x30 [ 94.023774][ T5320] [ 94.023774][ T5320] -> #0 (pcpu_alloc_mutex){+.+.}-{4:4}: [ 94.027051][ T5320] __lock_acquire+0x1520/0x2cf0 [ 94.029367][ T5320] lock_acquire+0x106/0x350 [ 94.031653][ T5320] __mutex_lock+0x19d/0x1550 [ 94.033858][ T5320] pcpu_alloc_noprof+0x231/0x1900 [ 94.036147][ T5320] __percpu_counter_init_many+0x42/0x380 [ 94.038703][ T5320] blkg_rwstat_init+0x2c/0x170 [ 94.040969][ T5320] bfq_pd_alloc+0xb6/0x390 [ 94.043088][ T5320] blkcg_activate_policy+0x650/0xb10 [ 94.045591][ T5320] bfq_create_group_hierarchy+0x62/0x120 [ 94.048273][ T5320] bfq_init_queue+0xbca/0x1300 [ 94.050571][ T5320] blk_mq_init_sched+0x2e9/0x620 [ 94.052937][ T5320] elevator_switch+0x26f/0x7b0 [ 94.055302][ T5320] elevator_change+0x2fa/0x480 [ 94.057677][ T5320] elv_iosched_store+0x504/0x630 [ 94.060105][ T5320] queue_attr_store+0x207/0x2b0 [ 94.062370][ T5320] kernfs_fop_write_iter+0x3a4/0x540 [ 94.064921][ T5320] vfs_write+0x612/0xba0 [ 94.067032][ T5320] ksys_write+0x150/0x270 [ 94.069237][ T5320] do_syscall_64+0x174/0x580 [ 94.071527][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.074277][ T5320] [ 94.074277][ T5320] other info that might help us debug this: [ 94.074277][ T5320] [ 94.078575][ T5320] Chain exists of: [ 94.078575][ T5320] pcpu_alloc_mutex --> &q->q_usage_counter(io)#17 --> &q->elevator_lock [ 94.078575][ T5320] [ 94.084692][ T5320] Possible unsafe locking scenario: [ 94.084692][ T5320] [ 94.088028][ T5320] CPU0 CPU1 [ 94.090395][ T5320] ---- ---- [ 94.092728][ T5320] lock(&q->elevator_lock); [ 94.094808][ T5320] lock(&q->q_usage_counter(io)#17); [ 94.098300][ T5320] lock(&q->elevator_lock); [ 94.101393][ T5320] lock(pcpu_alloc_mutex); [ 94.103341][ T5320] [ 94.103341][ T5320] *** DEADLOCK *** [ 94.103341][ T5320] [ 94.106637][ T5320] 8 locks held by syz.0.0/5320: [ 94.108694][ T5320] #0: ffff8880435440f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 [ 94.112438][ T5320] #1: ffff888033866450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 [ 94.116080][ T5320] #2: ffff88801f59f080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540 [ 94.120239][ T5320] #3: ffff8880351d2788 (kn->active#66){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540 [ 94.124548][ T5320] #4: ffff88803513c3a0 (&set->update_nr_hwq_lock){++++}-{4:4}, at: elv_iosched_store+0x498/0x630 [ 94.129166][ T5320] #5: ffff888034b0c190 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: elevator_change+0x194/0x480 [ 94.133481][ T5320] #6: ffff888034b0c1c8 (&q->q_usage_counter(queue)){+.+.}-{0:0}, at: elevator_change+0x194/0x480 [ 94.137941][ T5320] #7: ffff888034b0c6b8 (&q->elevator_lock){+.+.}-{4:4}, at: elevator_change+0x1af/0x480 [ 94.142288][ T5320] [ 94.142288][ T5320] stack backtrace: [ 94.144899][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 94.144915][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.144923][ T5320] Call Trace: [ 94.144931][ T5320] [ 94.144937][ T5320] dump_stack_lvl+0xe8/0x150 [ 94.144958][ T5320] print_circular_bug+0x2e1/0x300 [ 94.144978][ T5320] check_noncircular+0x12e/0x150 [ 94.144996][ T5320] __lock_acquire+0x1520/0x2cf0 [ 94.145012][ T5320] ? kernel_text_address+0xa5/0xe0 [ 94.145029][ T5320] ? do_raw_spin_lock+0x12b/0x2f0 [ 94.145042][ T5320] ? lock_acquire+0x106/0x350 [ 94.145056][ T5320] ? pcpu_alloc_noprof+0x231/0x1900 [ 94.145066][ T5320] lock_acquire+0x106/0x350 [ 94.145086][ T5320] ? pcpu_alloc_noprof+0x231/0x1900 [ 94.145100][ T5320] __mutex_lock+0x19d/0x1550 [ 94.145114][ T5320] ? pcpu_alloc_noprof+0x231/0x1900 [ 94.145124][ T5320] ? blkcg_activate_policy+0x650/0xb10 [ 94.145141][ T5320] ? bfq_init_queue+0xbca/0x1300 [ 94.145153][ T5320] ? blk_mq_init_sched+0x2e9/0x620 [ 94.145169][ T5320] ? elevator_switch+0x26f/0x7b0 [ 94.145180][ T5320] ? elevator_change+0x2fa/0x480 [ 94.145190][ T5320] ? elv_iosched_store+0x504/0x630 [ 94.145203][ T5320] ? queue_attr_store+0x207/0x2b0 [ 94.145216][ T5320] ? kernfs_fop_write_iter+0x3a4/0x540 [ 94.145233][ T5320] ? vfs_write+0x612/0xba0 [ 94.145246][ T5320] ? ksys_write+0x150/0x270 [ 94.145258][ T5320] ? do_syscall_64+0x174/0x580 [ 94.145273][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.145285][ T5320] ? pcpu_alloc_noprof+0x231/0x1900 [ 94.145297][ T5320] ? __pfx___mutex_lock+0x10/0x10 [ 94.145315][ T5320] pcpu_alloc_noprof+0x231/0x1900 [ 94.145326][ T5320] ? rcu_is_watching+0x15/0xb0 [ 94.145344][ T5320] ? __kasan_kmalloc+0x93/0xb0 [ 94.145356][ T5320] __percpu_counter_init_many+0x42/0x380 [ 94.145375][ T5320] ? bfq_pd_alloc+0x9d/0x390 [ 94.145385][ T5320] blkg_rwstat_init+0x2c/0x170 [ 94.145401][ T5320] bfq_pd_alloc+0xb6/0x390 [ 94.145411][ T5320] ? __pfx_bfq_pd_alloc+0x10/0x10 [ 94.145420][ T5320] blkcg_activate_policy+0x650/0xb10 [ 94.145437][ T5320] bfq_create_group_hierarchy+0x62/0x120 [ 94.145449][ T5320] bfq_init_queue+0xbca/0x1300 [ 94.145461][ T5320] blk_mq_init_sched+0x2e9/0x620 [ 94.145479][ T5320] elevator_switch+0x26f/0x7b0 [ 94.145490][ T5320] ? blk_mq_cancel_work_sync+0xa5/0xe0 [ 94.145505][ T5320] elevator_change+0x2fa/0x480 [ 94.145517][ T5320] ? do_raw_spin_unlock+0x4d/0x210 [ 94.145529][ T5320] elv_iosched_store+0x504/0x630 [ 94.145551][ T5320] ? __pfx_elv_iosched_store+0x10/0x10 [ 94.145566][ T5320] ? __lock_acquire+0x683/0x2cf0 [ 94.145583][ T5320] queue_attr_store+0x207/0x2b0 [ 94.145599][ T5320] ? __pfx_queue_attr_store+0x10/0x10 [ 94.145616][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 94.145627][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 94.145640][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 94.145656][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 94.145665][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 94.145675][ T5320] ? sysfs_file_kobj+0x1e4/0x230 [ 94.145688][ T5320] ? sysfs_kf_write+0x166/0x260 [ 94.145699][ T5320] ? __pfx_sysfs_kf_write+0x10/0x10 [ 94.145709][ T5320] kernfs_fop_write_iter+0x3a4/0x540 [ 94.145729][ T5320] vfs_write+0x612/0xba0 [ 94.145745][ T5320] ? __pfx_vfs_write+0x10/0x10 [ 94.145761][ T5320] ? __fget_files+0x2a/0x420 [ 94.145775][ T5320] ksys_write+0x150/0x270 [ 94.145791][ T5320] ? __pfx_ksys_write+0x10/0x10 [ 94.145805][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.145818][ T5320] do_syscall_64+0x174/0x580 [ 94.145832][ T5320] ? trace_irq_disable+0x3b/0x140 [ 94.145844][ T5320] ? clear_bhb_loop+0x70/0xc0 [ 94.145857][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.145868][ T5320] RIP: 0033:0x7f5250b9e0d9 [ 94.145879][ T5320] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 [ 94.145890][ T5320] RSP: 002b:00007f5251a57fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.145903][ T5320] RAX: ffffffffffffffda RBX: 00007f5250e25fa0 RCX: 00007f5250b9e0d9 [ 94.145911][ T5320] RDX: 0000000000000003 RSI: 0000200000000300 RDI: 0000000000000006 [ 94.145919][ T5320] RBP: 00007f5250c35024 R08: 0000000000000000 R09: 0000000000000000 [ 94.145926][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.145932][ T5320] R13: 00007f5250e26038 R14: 00007f5250e25fa0 R15: 00007fff161b3508 [ 94.145943][ T5320] [ 94.354017][ T5322] loop0: detected capacity change from 0 to 1024 [ 94.429488][ T5322] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.