Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. 2021/07/12 19:40:13 fuzzer started 2021/07/12 19:40:13 connecting to host at 10.128.0.169:42067 2021/07/12 19:40:13 checking machine... 2021/07/12 19:40:13 checking revisions... 2021/07/12 19:40:13 testing simple program... syzkaller login: [ 70.407686][ T8482] chnl_net:caif_netlink_parms(): no params data found [ 70.461116][ T8482] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.471849][ T8482] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.481648][ T8482] device bridge_slave_0 entered promiscuous mode [ 70.491537][ T8482] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.499444][ T8482] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.508995][ T8482] device bridge_slave_1 entered promiscuous mode [ 70.529696][ T8482] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.541283][ T8482] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.565654][ T8482] team0: Port device team_slave_0 added [ 70.573159][ T8482] team0: Port device team_slave_1 added [ 70.592301][ T8482] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.599642][ T8482] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 70.626835][ T8482] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.641623][ T8482] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.649306][ T8482] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 70.676582][ T8482] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.703894][ T8482] device hsr_slave_0 entered promiscuous mode [ 70.710981][ T8482] device hsr_slave_1 entered promiscuous mode [ 70.817399][ T8482] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.828166][ T8482] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.839725][ T8482] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.849900][ T8482] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.875576][ T8482] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.882918][ T8482] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.890853][ T8482] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.898011][ T8482] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.940937][ T8482] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.954566][ T4860] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.966215][ T4860] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.976421][ T4860] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.986287][ T4860] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 71.000962][ T8482] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.012502][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.021904][ T2959] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.029196][ T2959] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.053322][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.063071][ T2959] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.070221][ T2959] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.079728][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.088782][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.100074][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.110376][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.124638][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.137390][ T8482] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.155293][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.162856][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.178001][ T8482] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.204655][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 71.220756][ T8482] device veth0_vlan entered promiscuous mode [ 71.228210][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 71.240196][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.248541][ T2959] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.259633][ T8482] device veth1_vlan entered promiscuous mode [ 71.282559][ T8482] device veth0_macvtap entered promiscuous mode [ 71.290241][ T4867] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.300544][ T4867] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 71.309815][ T4867] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.319768][ T4867] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.330074][ T8482] device veth1_macvtap entered promiscuous mode [ 71.348431][ T8482] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.356670][ T4860] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.372043][ T8482] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.383636][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.393519][ T8482] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.402754][ T8482] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.412037][ T8482] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.421310][ T8482] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 71.523108][ T210] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.536179][ T210] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.553315][ T4860] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 71.574969][ T10] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.583001][ T10] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.595842][ T4860] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/07/12 19:40:16 building call list... [ 72.479610][ T94] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 73.911094][ T8725] [ 73.913532][ T8725] ====================================================== [ 73.920561][ T8725] WARNING: possible circular locking dependency detected [ 73.927603][ T8725] 5.14.0-rc1-syzkaller #0 Not tainted [ 73.932953][ T8725] ------------------------------------------------------ [ 73.939962][ T8725] syz-fuzzer/8725 is trying to acquire lock: [ 73.946018][ T8725] ffffffff8ba9c460 (fs_reclaim){+.+.}-{0:0}, at: fs_reclaim_acquire+0xf7/0x160 [ 73.955654][ T8725] [ 73.955654][ T8725] but task is already holding lock: [ 73.962991][ T8725] ffff8880b9d4d660 (lock#2){-.-.}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 [ 73.971754][ T8725] [ 73.971754][ T8725] which lock already depends on the new lock. [ 73.971754][ T8725] [ 73.982461][ T8725] [ 73.982461][ T8725] the existing dependency chain (in reverse order) is: [ 73.991546][ T8725] [ 73.991546][ T8725] -> #1 (lock#2){-.-.}-{2:2}: [ 73.998485][ T8725] free_unref_page+0x1bf/0x690 [ 74.003762][ T8725] __mmdrop+0xcb/0x3f0 [ 74.008348][ T8725] finish_task_switch.isra.0+0x6da/0xa50 [ 74.014594][ T8725] __schedule+0x942/0x26f0 [ 74.019515][ T8725] preempt_schedule_irq+0x4e/0x90 [ 74.025042][ T8725] irqentry_exit+0x31/0x80 [ 74.029960][ T8725] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 74.036616][ T8725] lock_acquire+0x1ef/0x510 [ 74.041647][ T8725] fs_reclaim_acquire+0x117/0x160 [ 74.047323][ T8725] kmem_cache_alloc+0x3e/0x3a0 [ 74.052680][ T8725] __alloc_file+0x21/0x280 [ 74.057602][ T8725] alloc_empty_file+0x6d/0x170 [ 74.062869][ T8725] path_openat+0xde/0x27f0 [ 74.067804][ T8725] do_filp_open+0x1aa/0x400 [ 74.072869][ T8725] do_sys_openat2+0x16d/0x420 [ 74.078076][ T8725] __x64_sys_open+0x119/0x1c0 [ 74.083271][ T8725] do_syscall_64+0x35/0xb0 [ 74.088295][ T8725] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.094971][ T8725] [ 74.094971][ T8725] -> #0 (fs_reclaim){+.+.}-{0:0}: [ 74.102267][ T8725] __lock_acquire+0x2a07/0x54a0 [ 74.107635][ T8725] lock_acquire+0x1ab/0x510 [ 74.112894][ T8725] fs_reclaim_acquire+0x117/0x160 [ 74.118470][ T8725] prepare_alloc_pages+0x15c/0x580 [ 74.124183][ T8725] __alloc_pages+0x12f/0x500 [ 74.129376][ T8725] alloc_pages+0x18c/0x2a0 [ 74.134317][ T8725] stack_depot_save+0x39d/0x4e0 [ 74.139671][ T8725] save_stack+0x15e/0x1e0 [ 74.144514][ T8725] __set_page_owner+0x50/0x290 [ 74.149802][ T8725] __alloc_pages_bulk+0x8b9/0x1870 [ 74.155811][ T8725] __vmalloc_node_range+0x39d/0x960 [ 74.161761][ T8725] __vmalloc+0x69/0x80 [ 74.166344][ T8725] snd_dma_vmalloc_alloc+0x57/0xa0 [ 74.171962][ T8725] __snd_dma_alloc_pages+0xc1/0x130 [ 74.177666][ T8725] snd_dma_alloc_pages+0x13b/0x230 [ 74.183285][ T8725] do_alloc_pages+0x9b/0x160 [ 74.188379][ T8725] snd_pcm_lib_malloc_pages+0x3f6/0x880 [ 74.194435][ T8725] snd_pcm_hw_params+0x1408/0x1990 [ 74.200154][ T8725] snd_pcm_kernel_ioctl+0xd1/0x240 [ 74.205906][ T8725] snd_pcm_oss_change_params_locked+0x1958/0x3990 [ 74.212835][ T8725] snd_pcm_oss_make_ready+0xe7/0x1b0 [ 74.218651][ T8725] snd_pcm_oss_sync+0x1de/0x800 [ 74.224035][ T8725] snd_pcm_oss_release+0x276/0x300 [ 74.229657][ T8725] __fput+0x288/0x920 [ 74.234146][ T8725] task_work_run+0xdd/0x1a0 [ 74.239156][ T8725] exit_to_user_mode_prepare+0x27e/0x290 [ 74.245323][ T8725] syscall_exit_to_user_mode+0x19/0x60 [ 74.251289][ T8725] do_syscall_64+0x42/0xb0 [ 74.256294][ T8725] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.262692][ T8725] [ 74.262692][ T8725] other info that might help us debug this: [ 74.262692][ T8725] [ 74.273013][ T8725] Possible unsafe locking scenario: [ 74.273013][ T8725] [ 74.280441][ T8725] CPU0 CPU1 [ 74.285784][ T8725] ---- ---- [ 74.291237][ T8725] lock(lock#2); [ 74.294873][ T8725] lock(fs_reclaim); [ 74.301350][ T8725] lock(lock#2); [ 74.307491][ T8725] lock(fs_reclaim); [ 74.311456][ T8725] [ 74.311456][ T8725] *** DEADLOCK *** [ 74.311456][ T8725] [ 74.319584][ T8725] 2 locks held by syz-fuzzer/8725: [ 74.324689][ T8725] #0: ffff88803553a440 (&runtime->oss.params_lock){+.+.}-{3:3}, at: snd_pcm_oss_make_ready+0xc7/0x1b0 [ 74.335720][ T8725] #1: ffff8880b9d4d660 (lock#2){-.-.}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 [ 74.344936][ T8725] [ 74.344936][ T8725] stack backtrace: [ 74.350804][ T8725] CPU: 1 PID: 8725 Comm: syz-fuzzer Not tainted 5.14.0-rc1-syzkaller #0 [ 74.359303][ T8725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.369338][ T8725] Call Trace: [ 74.372615][ T8725] dump_stack_lvl+0xcd/0x134 [ 74.377197][ T8725] check_noncircular+0x25f/0x2e0 [ 74.382221][ T8725] ? print_circular_bug+0x1e0/0x1e0 [ 74.387421][ T8725] ? __kernel_text_address+0x9/0x30 [ 74.392604][ T8725] ? unwind_get_return_address+0x51/0x90 [ 74.398249][ T8725] ? lockdep_lock+0xc6/0x200 [ 74.402934][ T8725] ? call_rcu_zapped+0xb0/0xb0 [ 74.407686][ T8725] __lock_acquire+0x2a07/0x54a0 [ 74.412527][ T8725] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 74.418530][ T8725] ? register_early_stack+0xb0/0xb0 [ 74.423904][ T8725] lock_acquire+0x1ab/0x510 [ 74.428515][ T8725] ? fs_reclaim_acquire+0xf7/0x160 [ 74.433614][ T8725] ? lock_release+0x720/0x720 [ 74.438295][ T8725] ? lock_chain_count+0x20/0x20 [ 74.443128][ T8725] ? mark_lock+0xef/0x17b0 [ 74.447612][ T8725] ? deref_stack_reg+0xee/0x150 [ 74.452449][ T8725] fs_reclaim_acquire+0x117/0x160 [ 74.457470][ T8725] ? fs_reclaim_acquire+0xf7/0x160 [ 74.462565][ T8725] prepare_alloc_pages+0x15c/0x580 [ 74.467688][ T8725] ? __fput+0x288/0x920 [ 74.471829][ T8725] __alloc_pages+0x12f/0x500 [ 74.476420][ T8725] ? __alloc_pages_slowpath.constprop.0+0x21b0/0x21b0 [ 74.483179][ T8725] ? __unwind_start+0x51b/0x800 [ 74.488030][ T8725] ? __kernel_text_address+0x9/0x30 [ 74.493214][ T8725] alloc_pages+0x18c/0x2a0 [ 74.498146][ T8725] stack_depot_save+0x39d/0x4e0 [ 74.502983][ T8725] save_stack+0x15e/0x1e0 [ 74.507304][ T8725] ? register_early_stack+0xb0/0xb0 executing program [ 74.512501][ T8725] ? __alloc_pages_bulk+0x8b9/0x1870 [ 74.517772][ T8725] ? __vmalloc_node_range+0x39d/0x960 [ 74.523135][ T8725] ? __vmalloc+0x69/0x80 [ 74.527376][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 74.532678][ T8725] ? __snd_dma_alloc_pages+0xc1/0x130 [ 74.538037][ T8725] ? snd_dma_alloc_pages+0x13b/0x230 [ 74.543301][ T8725] ? do_alloc_pages+0x9b/0x160 [ 74.548049][ T8725] ? snd_pcm_lib_malloc_pages+0x3f6/0x880 [ 74.553749][ T8725] ? snd_pcm_hw_params+0x1408/0x1990 [ 74.559049][ T8725] ? snd_pcm_kernel_ioctl+0xd1/0x240 [ 74.564317][ T8725] ? snd_pcm_oss_change_params_locked+0x1958/0x3990 [ 74.570891][ T8725] ? snd_pcm_oss_make_ready+0xe7/0x1b0 [ 74.576349][ T8725] ? snd_pcm_oss_sync+0x1de/0x800 [ 74.581483][ T8725] ? snd_pcm_oss_release+0x276/0x300 [ 74.586750][ T8725] ? __fput+0x288/0x920 [ 74.590908][ T8725] ? task_work_run+0xdd/0x1a0 [ 74.595576][ T8725] ? preempt_count_add+0x74/0x140 [ 74.600665][ T8725] __set_page_owner+0x50/0x290 [ 74.605553][ T8725] ? post_alloc_hook+0x145/0x1e0 [ 74.610588][ T8725] __alloc_pages_bulk+0x8b9/0x1870 [ 74.615717][ T8725] ? __alloc_pages+0x500/0x500 [ 74.620522][ T8725] ? rcu_read_lock_sched_held+0x3a/0x70 [ 74.626070][ T8725] ? trace_kmalloc_node+0x32/0x100 [ 74.632252][ T8725] __vmalloc_node_range+0x39d/0x960 [ 74.637442][ T8725] ? vfree_atomic+0xe0/0xe0 [ 74.642104][ T8725] ? find_held_lock+0x2d/0x110 [ 74.646856][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 74.652225][ T8725] __vmalloc+0x69/0x80 [ 74.656371][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 74.661636][ T8725] snd_dma_vmalloc_alloc+0x57/0xa0 [ 74.666813][ T8725] ? snd_dma_vmalloc_free+0x40/0x40 [ 74.672016][ T8725] __snd_dma_alloc_pages+0xc1/0x130 [ 74.677294][ T8725] snd_dma_alloc_pages+0x13b/0x230 [ 74.682443][ T8725] do_alloc_pages+0x9b/0x160 [ 74.687028][ T8725] snd_pcm_lib_malloc_pages+0x3f6/0x880 [ 74.692659][ T8725] ? snd_pcm_hw_params+0x828/0x1990 [ 74.697856][ T8725] snd_pcm_hw_params+0x1408/0x1990 [ 74.702954][ T8725] ? snd_pcm_playback_open+0x130/0x130 [ 74.708397][ T8725] ? snd_pcm_hw_param_near.constprop.0+0x6ca/0x8f0 [ 74.714907][ T8725] ? snd_pcm_oss_disconnect_minor+0x370/0x370 [ 74.720982][ T8725] snd_pcm_kernel_ioctl+0xd1/0x240 [ 74.726077][ T8725] snd_pcm_oss_change_params_locked+0x1958/0x3990 [ 74.732564][ T8725] ? snd_pcm_plugin_append+0x190/0x190 [ 74.738366][ T8725] ? snd_pcm_oss_make_ready+0xc7/0x1b0 [ 74.744009][ T8725] ? locks_remove_posix+0x33b/0x5e0 [ 74.749216][ T8725] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 74.755195][ T8725] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.761415][ T8725] ? __fsnotify_parent+0x488/0x9d0 [ 74.766510][ T8725] snd_pcm_oss_make_ready+0xe7/0x1b0 [ 74.771803][ T8725] snd_pcm_oss_sync+0x1de/0x800 [ 74.776653][ T8725] snd_pcm_oss_release+0x276/0x300 [ 74.781757][ T8725] __fput+0x288/0x920 [ 74.785731][ T8725] ? snd_pcm_oss_sync+0x800/0x800 [ 74.790767][ T8725] task_work_run+0xdd/0x1a0 [ 74.795253][ T8725] exit_to_user_mode_prepare+0x27e/0x290 [ 74.800870][ T8725] syscall_exit_to_user_mode+0x19/0x60 [ 74.806313][ T8725] do_syscall_64+0x42/0xb0 [ 74.810798][ T8725] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.816695][ T8725] RIP: 0033:0x4af19b [ 74.820661][ T8725] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 74.840340][ T8725] RSP: 002b:000000c0003c9430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 74.848743][ T8725] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 74.856706][ T8725] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 74.864663][ T8725] RBP: 000000c0003c9470 R08: 0000000000000001 R09: 0000000000000000 [ 74.872699][ T8725] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000013e [ 74.880661][ T8725] R13: 000000000000013d R14: 0000000000000200 R15: 000000c00060e280 [ 74.889144][ T8725] BUG: sleeping function called from invalid context at mm/page_alloc.c:5167 [ 74.897964][ T8725] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 8725, name: syz-fuzzer [ 74.907420][ T8725] INFO: lockdep is turned off. [ 74.912153][ T8725] irq event stamp: 31794 [ 74.916381][ T8725] hardirqs last enabled at (31793): [] _raw_spin_unlock_irqrestore+0x50/0x70 [ 74.926806][ T8725] hardirqs last disabled at (31794): [] __alloc_pages_bulk+0x1017/0x1870 [ 74.936780][ T8725] softirqs last enabled at (30150): [] __irq_exit_rcu+0x16e/0x1c0 [ 74.946367][ T8725] softirqs last disabled at (30117): [] __irq_exit_rcu+0x16e/0x1c0 [ 74.955821][ T8725] CPU: 1 PID: 8725 Comm: syz-fuzzer Not tainted 5.14.0-rc1-syzkaller #0 [ 74.964248][ T8725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.974722][ T8725] Call Trace: [ 74.977995][ T8725] dump_stack_lvl+0xcd/0x134 [ 74.982592][ T8725] ___might_sleep.cold+0x1f1/0x237 [ 74.987892][ T8725] prepare_alloc_pages+0x3da/0x580 [ 74.993333][ T8725] ? __fput+0x288/0x920 [ 74.997594][ T8725] __alloc_pages+0x12f/0x500 [ 75.002501][ T8725] ? __alloc_pages_slowpath.constprop.0+0x21b0/0x21b0 [ 75.009269][ T8725] ? __unwind_start+0x51b/0x800 [ 75.014246][ T8725] ? __kernel_text_address+0x9/0x30 [ 75.019478][ T8725] alloc_pages+0x18c/0x2a0 [ 75.023908][ T8725] stack_depot_save+0x39d/0x4e0 [ 75.028892][ T8725] save_stack+0x15e/0x1e0 [ 75.033219][ T8725] ? register_early_stack+0xb0/0xb0 [ 75.038411][ T8725] ? __alloc_pages_bulk+0x8b9/0x1870 [ 75.043703][ T8725] ? __vmalloc_node_range+0x39d/0x960 [ 75.049171][ T8725] ? __vmalloc+0x69/0x80 [ 75.053397][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 75.058664][ T8725] ? __snd_dma_alloc_pages+0xc1/0x130 [ 75.064020][ T8725] ? snd_dma_alloc_pages+0x13b/0x230 [ 75.069290][ T8725] ? do_alloc_pages+0x9b/0x160 [ 75.074051][ T8725] ? snd_pcm_lib_malloc_pages+0x3f6/0x880 [ 75.079881][ T8725] ? snd_pcm_hw_params+0x1408/0x1990 [ 75.085278][ T8725] ? snd_pcm_kernel_ioctl+0xd1/0x240 [ 75.090650][ T8725] ? snd_pcm_oss_change_params_locked+0x1958/0x3990 [ 75.097252][ T8725] ? snd_pcm_oss_make_ready+0xe7/0x1b0 [ 75.102698][ T8725] ? snd_pcm_oss_sync+0x1de/0x800 [ 75.107792][ T8725] ? snd_pcm_oss_release+0x276/0x300 [ 75.113059][ T8725] ? __fput+0x288/0x920 [ 75.117199][ T8725] ? task_work_run+0xdd/0x1a0 [ 75.121859][ T8725] ? preempt_count_add+0x74/0x140 [ 75.126964][ T8725] __set_page_owner+0x50/0x290 [ 75.131712][ T8725] ? post_alloc_hook+0x145/0x1e0 [ 75.136649][ T8725] __alloc_pages_bulk+0x8b9/0x1870 [ 75.141764][ T8725] ? __alloc_pages+0x500/0x500 [ 75.146883][ T8725] ? rcu_read_lock_sched_held+0x3a/0x70 [ 75.152426][ T8725] ? trace_kmalloc_node+0x32/0x100 [ 75.157533][ T8725] __vmalloc_node_range+0x39d/0x960 [ 75.162732][ T8725] ? vfree_atomic+0xe0/0xe0 [ 75.167442][ T8725] ? find_held_lock+0x2d/0x110 [ 75.172202][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 75.177473][ T8725] __vmalloc+0x69/0x80 [ 75.181538][ T8725] ? snd_dma_vmalloc_alloc+0x57/0xa0 [ 75.187080][ T8725] snd_dma_vmalloc_alloc+0x57/0xa0 [ 75.192371][ T8725] ? snd_dma_vmalloc_free+0x40/0x40 [ 75.197559][ T8725] __snd_dma_alloc_pages+0xc1/0x130 [ 75.202744][ T8725] snd_dma_alloc_pages+0x13b/0x230 [ 75.207847][ T8725] do_alloc_pages+0x9b/0x160 [ 75.212437][ T8725] snd_pcm_lib_malloc_pages+0x3f6/0x880 [ 75.217968][ T8725] ? snd_pcm_hw_params+0x828/0x1990 [ 75.223326][ T8725] snd_pcm_hw_params+0x1408/0x1990 [ 75.228442][ T8725] ? snd_pcm_playback_open+0x130/0x130 [ 75.233931][ T8725] ? snd_pcm_hw_param_near.constprop.0+0x6ca/0x8f0 [ 75.240623][ T8725] ? snd_pcm_oss_disconnect_minor+0x370/0x370 [ 75.246681][ T8725] snd_pcm_kernel_ioctl+0xd1/0x240 [ 75.251798][ T8725] snd_pcm_oss_change_params_locked+0x1958/0x3990 [ 75.258247][ T8725] ? snd_pcm_plugin_append+0x190/0x190 [ 75.263813][ T8725] ? snd_pcm_oss_make_ready+0xc7/0x1b0 [ 75.269356][ T8725] ? locks_remove_posix+0x33b/0x5e0 [ 75.274563][ T8725] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 75.280524][ T8725] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 75.286748][ T8725] ? __fsnotify_parent+0x488/0x9d0 [ 75.291850][ T8725] snd_pcm_oss_make_ready+0xe7/0x1b0 [ 75.297119][ T8725] snd_pcm_oss_sync+0x1de/0x800 [ 75.301953][ T8725] snd_pcm_oss_release+0x276/0x300 [ 75.307056][ T8725] __fput+0x288/0x920 [ 75.311023][ T8725] ? snd_pcm_oss_sync+0x800/0x800 [ 75.316048][ T8725] task_work_run+0xdd/0x1a0 [ 75.320533][ T8725] exit_to_user_mode_prepare+0x27e/0x290 [ 75.326239][ T8725] syscall_exit_to_user_mode+0x19/0x60 [ 75.331696][ T8725] do_syscall_64+0x42/0xb0 [ 75.336111][ T8725] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 75.342531][ T8725] RIP: 0033:0x4af19b [ 75.346407][ T8725] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 75.366219][ T8725] RSP: 002b:000000c0003c9430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 75.374624][ T8725] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 75.382600][ T8725] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 75.390802][ T8725] RBP: 000000c0003c9470 R08: 0000000000000001 R09: 0000000000000000 [ 75.398780][ T8725] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000013e [ 75.406737][ T8725] R13: 000000000000013d R14: 0000000000000200 R15: 000000c00060e280 [ 75.535800][ T8725] can: request_module (can-proto-0) failed. [ 75.546965][ T8725] can: request_module (can-proto-0) failed. [ 75.558152][ T8725] can: request_module (can-proto-0) failed. [ 75.727992][ T8725] base_sock_release(ffff888039abca80) sk=ffff88802fb0b000