[ 18.155709][ T3636] 8021q: adding VLAN 0 to HW filter on device bond0 [ 18.158953][ T3636] eql: remember to turn off Van-Jacobson compression on your slave devices [ 18.205512][ T300] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 18.210124][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.110' (ED25519) to the list of known hosts. executing program syzkaller login: [ 40.960348][ T3974] loop0: detected capacity change from 0 to 2048 [ 40.980383][ T3974] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 41.082608][ T3979] loop0: detected capacity change from 0 to 2048 [ 41.178228][ T3979] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 41.310424][ T3982] loop0: detected capacity change from 0 to 2048 [ 41.429352][ T3982] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 41.507832][ T3985] loop0: detected capacity change from 0 to 2048 [ 41.619065][ T3985] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 41.730209][ T3988] loop0: detected capacity change from 0 to 2048 [ 41.817947][ T3988] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 41.941138][ T3991] loop0: detected capacity change from 0 to 2048 [ 42.027672][ T3991] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.160100][ T3994] loop0: detected capacity change from 0 to 2048 [ 42.237736][ T3994] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.309543][ T3997] loop0: detected capacity change from 0 to 2048 [ 42.368740][ T3997] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.448807][ T4000] loop0: detected capacity change from 0 to 2048 [ 42.548075][ T4000] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.658478][ T4003] loop0: detected capacity change from 0 to 2048 [ 42.678987][ T4003] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.759471][ T4006] loop0: detected capacity change from 0 to 2048 [ 42.837851][ T4006] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 42.928130][ T4009] loop0: detected capacity change from 0 to 2048 [ 43.027394][ T4009] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.109104][ T4012] loop0: detected capacity change from 0 to 2048 [ 43.188529][ T4012] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.288262][ T4015] loop0: detected capacity change from 0 to 2048 [ 43.307945][ T4015] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.382973][ T4018] loop0: detected capacity change from 0 to 2048 [ 43.447377][ T4018] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.549075][ T4021] loop0: detected capacity change from 0 to 2048 [ 43.657646][ T4021] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.739741][ T4024] loop0: detected capacity change from 0 to 2048 [ 43.831422][ T4024] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 43.939856][ T4027] loop0: detected capacity change from 0 to 2048 [ 44.038348][ T4027] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.109513][ T4030] loop0: detected capacity change from 0 to 2048 [ 44.157427][ T4030] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.258330][ T4033] loop0: detected capacity change from 0 to 2048 [ 44.338153][ T4033] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.417959][ T4036] loop0: detected capacity change from 0 to 2048 [ 44.537605][ T4036] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.639756][ T4039] loop0: detected capacity change from 0 to 2048 [ 44.728362][ T4039] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.818894][ T4042] loop0: detected capacity change from 0 to 2048 [ 44.830066][ T4042] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.886477][ T4045] loop0: detected capacity change from 0 to 2048 [ 44.948836][ T4045] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 44.997181][ T4048] loop0: detected capacity change from 0 to 2048 [ 45.136958][ T4048] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.218551][ T4052] loop0: detected capacity change from 0 to 2048 [ 45.228068][ T4052] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.309081][ T4055] loop0: detected capacity change from 0 to 2048 [ 45.407759][ T4055] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.499170][ T4058] loop0: detected capacity change from 0 to 2048 [ 45.508023][ T4058] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.590578][ T4061] loop0: detected capacity change from 0 to 2048 [ 45.697870][ T4061] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.779581][ T4064] loop0: detected capacity change from 0 to 2048 [ 45.787853][ T4064] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 45.848167][ T4067] loop0: detected capacity change from 0 to 2048 [ 46.018333][ T4067] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.076773][ T4070] loop0: detected capacity change from 0 to 2048 [ 46.258598][ T4070] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.349360][ T4073] loop0: detected capacity change from 0 to 2048 [ 46.477943][ T4073] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.526574][ T4076] loop0: detected capacity change from 0 to 2048 [ 46.607517][ T4076] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.698694][ T4079] loop0: detected capacity change from 0 to 2048 [ 46.808184][ T4079] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.898995][ T4082] loop0: detected capacity change from 0 to 2048 [ 46.907520][ T4082] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 46.997885][ T4085] loop0: detected capacity change from 0 to 2048 [ 47.098327][ T4085] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.190110][ T4088] loop0: detected capacity change from 0 to 2048 [ 47.230572][ T4088] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.339635][ T4091] loop0: detected capacity change from 0 to 2048 [ 47.347666][ T4091] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.428702][ T4094] loop0: detected capacity change from 0 to 2048 [ 47.518079][ T4094] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.609333][ T4097] loop0: detected capacity change from 0 to 2048 [ 47.627716][ T4097] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.718656][ T4100] loop0: detected capacity change from 0 to 2048 [ 47.730423][ T4100] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.827897][ T4103] loop0: detected capacity change from 0 to 2048 [ 47.917468][ T4103] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 47.986901][ T4106] loop0: detected capacity change from 0 to 2048 [ 48.087667][ T4106] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 48.178804][ T4109] loop0: detected capacity change from 0 to 2048 [ 48.268041][ T4109] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 48.378036][ T4113] loop0: detected capacity change from 0 to 2048 [ 48.477542][ T4113] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 48.558367][ T4116] loop0: detected capacity change from 0 to 2048 [ 48.617879][ T4116] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 48.695538][ T4119] loop0: detected capacity change from 0 to 2048 [ 48.788012][ T4119] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 48.876613][ T4122] loop0: detected capacity change from 0 to 2048 [ 48.977534][ T4122] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.039951][ T4125] loop0: detected capacity change from 0 to 2048 [ 49.047604][ T4125] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.118330][ T4128] loop0: detected capacity change from 0 to 2048 [ 49.218441][ T4128] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.309032][ T4132] loop0: detected capacity change from 0 to 2048 [ 49.317833][ T4132] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.387062][ T4135] loop0: detected capacity change from 0 to 2048 [ 49.507522][ T4135] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.567287][ T4138] loop0: detected capacity change from 0 to 2048 [ 49.707607][ T4138] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.757279][ T4141] loop0: detected capacity change from 0 to 2048 [ 49.867383][ T4141] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 49.958850][ T4144] loop0: detected capacity change from 0 to 2048 [ 49.967703][ T4144] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.018093][ T4148] loop0: detected capacity change from 0 to 2048 [ 50.137735][ T4148] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.238513][ T4151] loop0: detected capacity change from 0 to 2048 [ 50.257615][ T4151] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.378576][ T4154] loop0: detected capacity change from 0 to 2048 [ 50.487807][ T4154] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.588771][ T4157] loop0: detected capacity change from 0 to 2048 [ 50.697490][ T4157] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.766396][ T4160] loop0: detected capacity change from 0 to 2048 [ 50.778457][ T4160] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 50.864712][ T4163] loop0: detected capacity change from 0 to 2048 [ 50.958041][ T4163] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 51.029977][ T4166] loop0: detected capacity change from 0 to 2048 [ 51.117533][ T4166] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 51.188328][ T4169] loop0: detected capacity change from 0 to 2048 [ 51.288278][ T4169] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. executing program [ 51.395558][ T4172] loop0: detected capacity change from 0 to 2048 executing program [ 51.500020][ T4175] loop0: detected capacity change from 0 to 2048 executing program [ 51.740133][ T4178] loop0: detected capacity change from 0 to 2048 executing program [ 51.798330][ T4181] loop0: detected capacity change from 0 to 2048 executing program [ 51.988141][ T4184] loop0: detected capacity change from 0 to 2048 executing program [ 52.166563][ T4187] loop0: detected capacity change from 0 to 2048 executing program [ 52.364590][ T4190] loop0: detected capacity change from 0 to 2048 executing program [ 52.536624][ T4193] loop0: detected capacity change from 0 to 2048 executing program [ 52.716577][ T4196] loop0: detected capacity change from 0 to 2048 executing program [ 52.877718][ T4199] loop0: detected capacity change from 0 to 2048 executing program [ 53.073547][ T4202] loop0: detected capacity change from 0 to 2048 executing program [ 53.168547][ T4205] loop0: detected capacity change from 0 to 2048 executing program [ 53.339028][ T4208] loop0: detected capacity change from 0 to 2048 executing program [ 53.509094][ T4211] loop0: detected capacity change from 0 to 2048 executing program [ 53.618984][ T4214] loop0: detected capacity change from 0 to 2048 executing program [ 53.685841][ T4217] ------------[ cut here ]------------ [ 53.687053][ T4217] WARNING: CPU: 0 PID: 4217 at kernel/locking/lockdep.c:896 look_up_lock_class+0x134/0x13c [ 53.689402][ T4217] Modules linked in: [ 53.690359][ T4217] CPU: 0 PID: 4217 Comm: syz-executor121 Not tainted 5.15.156-syzkaller #0 [ 53.692583][ T4217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 53.695262][ T4217] pstate: 204010c5 (nzCv daIF +PAN -UAO -TCO -DIT +SSBS BTYPE=--) [ 53.697292][ T4217] pc : look_up_lock_class+0x134/0x13c [ 53.698564][ T4217] lr : look_up_lock_class+0x74/0x13c [ 53.699939][ T4217] sp : ffff80001d1772e0 [ 53.700962][ T4217] x29: ffff80001d1772e0 x28: dfff800000000000 x27: 0000000000000001 [ 53.703012][ T4217] x26: ffff800018440d20 x25: ffff800018440000 x24: 0000000000000000 [ 53.704943][ T4217] x23: 0000000000000000 x22: 0000000000000000 x21: ffff80001856a6a1 [ 53.706978][ T4217] x20: ffff0000df1de628 x19: ffff80001708e4c0 x18: 1ffff00003a2ee9c [ 53.708741][ T4217] x17: 0000000000000000 x16: ffff8000082ecb00 x15: 00000000c0c0583b [ 53.710654][ T4217] x14: 1ffff0000292806a x13: ffff80001d1774a0 x12: dfff800000000000 [ 53.712507][ T4217] x11: ffff8000082f0050 x10: ffff80001494034c x9 : ffff800017207d00 [ 53.714381][ T4217] x8 : ffff80001856a6a0 x7 : ffff800008de2224 x6 : 0000000000000000 [ 53.716246][ T4217] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 [ 53.718122][ T4217] x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 [ 53.719905][ T4217] Call trace: [ 53.720590][ T4217] look_up_lock_class+0x134/0x13c [ 53.721801][ T4217] register_lock_class+0x90/0x6a4 [ 53.723005][ T4217] __lock_acquire+0x184/0x7638 [ 53.724091][ T4217] lock_acquire+0x240/0x77c [ 53.725050][ T4217] down_write_nested+0xc0/0x130 [ 53.726137][ T4217] ext4_double_down_write_data_sem+0x3c/0x4c [ 53.727514][ T4217] ext4_ioctl+0x4224/0x61bc [ 53.728557][ T4217] __arm64_sys_ioctl+0x14c/0x1c8 [ 53.729681][ T4217] invoke_syscall+0x98/0x2b8 [ 53.730704][ T4217] el0_svc_common+0x138/0x258 [ 53.731766][ T4217] do_el0_svc+0x58/0x14c [ 53.732696][ T4217] el0_svc+0x7c/0x1f0 [ 53.733572][ T4217] el0t_64_sync_handler+0x84/0xe4 [ 53.734765][ T4217] el0t_64_sync+0x1a0/0x1a4 [ 53.735861][ T4217] irq event stamp: 647 [ 53.736815][ T4217] hardirqs last enabled at (647): [] kasan_quarantine_put+0xdc/0x204 [ 53.739061][ T4217] hardirqs last disabled at (646): [] kasan_quarantine_put+0x9c/0x204 [ 53.741226][ T4217] softirqs last enabled at (626): [] __do_softirq+0xb5c/0xdb0 [ 53.743277][ T4217] softirqs last disabled at (621): [] __irq_exit_rcu+0x264/0x4d4 [ 53.745306][ T4217] ---[ end trace 3aba8003aff38bbf ]--- [ 53.758837][ T4217] loop0: detected capacity change from 0 to 2048 executing program [ 53.939343][ T4221] loop0: detected capacity change from 0 to 2048 executing program [ 54.108706][ T4224] loop0: detected capacity change from 0 to 2048 executing program [ 54.259225][ T4227] loop0: detected capacity change from 0 to 2048 executing program [ 54.369741][ T4230] loop0: detected capacity change from 0 to 2048 executing program [ 54.529279][ T4233] loop0: detected capacity change from 0 to 2048 executing program [ 54.614792][ T4236] loop0: detected capacity change from 0 to 2048 executing program [ 54.697820][ T4239] loop0: detected capacity change from 0 to 2048 executing program [ 54.888628][ T4242] loop0: detected capacity change from 0 to 2048 executing program [ 55.041139][ T4245] loop0: detected capacity change from 0 to 2048 executing program [ 55.211813][ T4248] loop0: detected capacity change from 0 to 2048 executing program [ 55.380586][ T4251] loop0: detected capacity change from 0 to 2048 executing program [ 55.539541][ T4254] loop0: detected capacity change from 0 to 2048 executing program [ 55.639561][ T4257] loop0: detected capacity change from 0 to 2048 executing program [ 55.799072][ T4260] loop0: detected capacity change from 0 to 2048 executing program [ 55.879985][ T4263] loop0: detected capacity change from 0 to 2048 executing program [ 56.010629][ T4266] loop0: detected capacity change from 0 to 2048 executing program [ 56.200021][ T4269] loop0: detected capacity change from 0 to 2048 executing program [ 56.318790][ T4272] loop0: detected capacity change from 0 to 2048 executing program [ 56.528049][ T4275] loop0: detected capacity change from 0 to 2048 executing program [ 56.710251][ T4278] loop0: detected capacity change from 0 to 2048 executing program [ 56.880165][ T4281] loop0: detected capacity change from 0 to 2048 executing program [ 57.043291][ T4284] loop0: detected capacity change from 0 to 2048 executing program [ 57.229418][ T4287] loop0: detected capacity change from 0 to 2048 executing program [ 57.408209][ T4291] loop0: detected capacity change from 0 to 2048 executing program [ 57.509238][ T4294] loop0: detected capacity change from 0 to 2048 executing program [ 57.690151][ T4297] loop0: detected capacity change from 0 to 2048 executing program [ 57.860112][ T4300] loop0: detected capacity change from 0 to 2048 executing program [ 58.018819][ T4303] loop0: detected capacity change from 0 to 2048 executing program [ 58.203175][ T4306] loop0: detected capacity change from 0 to 2048 executing program [ 58.400771][ T4309] loop0: detected capacity change from 0 to 2048 executing program [ 58.538939][ T4312] loop0: detected capacity change from 0 to 2048 executing program [ 58.709498][ T4315] loop0: detected capacity change from 0 to 2048 executing program [ 58.854547][ T4318] loop0: detected capacity change from 0 to 2048 executing program [ 58.949429][ T4321] loop0: detected capacity change from 0 to 2048 executing program [ 59.058878][ T4324] loop0: detected capacity change from 0 to 2048 executing program [ 59.253216][ T4327] loop0: detected capacity change from 0 to 2048 executing program [ 59.327594][ T4330] loop0: detected capacity change from 0 to 2048 executing program [ 59.524728][ T4333] loop0: detected capacity change from 0 to 2048 executing program [ 59.650057][ T4336] loop0: detected capacity change from 0 to 2048 executing program [ 59.789728][ T4339] loop0: detected capacity change from 0 to 2048 executing program [ 59.909105][ T4342] loop0: detected capacity change from 0 to 2048 executing program [ 60.066596][ T4345] loop0: detected capacity change from 0 to 2048 executing program [ 60.269803][ T4348] loop0: detected capacity change from 0 to 2048 executing program [ 60.429458][ T4351] loop0: detected capacity change from 0 to 2048 executing program [ 60.608938][ T4354] loop0: detected capacity change from 0 to 2048 executing program [ 60.781135][ T4357] loop0: detected capacity change from 0 to 2048 executing program [ 60.919721][ T4360] loop0: detected capacity change from 0 to 2048 executing program [ 61.088432][ T4363] loop0: detected capacity change from 0 to 2048 executing program [ 61.343938][ T4366] loop0: detected capacity change from 0 to 2048 executing program [ 61.561040][ T4369] loop0: detected capacity change from 0 to 2048 executing program [ 61.739889][ T4372] loop0: detected capacity change from 0 to 2048 executing program [ 61.917963][ T4375] loop0: detected capacity change from 0 to 2048 executing program [ 62.108229][ T4378] loop0: detected capacity change from 0 to 2048 executing program [ 62.290207][ T4382] loop0: detected capacity change from 0 to 2048 executing program [ 62.409032][ T4385] loop0: detected capacity change from 0 to 2048 executing program [ 62.619595][ T4388] loop0: detected capacity change from 0 to 2048 executing program [ 62.708222][ T4391] loop0: detected capacity change from 0 to 2048 executing program [ 62.899807][ T4394] loop0: detected capacity change from 0 to 2048 executing program [ 63.079081][ T4397] loop0: detected capacity change from 0 to 2048