Warning: Permanently added '10.128.0.40' (ECDSA) to the list of known hosts. 2020/07/14 00:20:03 parsed 1 programs 2020/07/14 00:20:04 executed programs: 0 syzkaller login: [ 1049.853553][ T6833] IPVS: ftp: loaded support on port[0] = 21 [ 1049.941373][ T6833] chnl_net:caif_netlink_parms(): no params data found [ 1049.988706][ T6833] bridge0: port 1(bridge_slave_0) entered blocking state [ 1049.996014][ T6833] bridge0: port 1(bridge_slave_0) entered disabled state [ 1050.004269][ T6833] device bridge_slave_0 entered promiscuous mode [ 1050.013182][ T6833] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.020592][ T6833] bridge0: port 2(bridge_slave_1) entered disabled state [ 1050.028582][ T6833] device bridge_slave_1 entered promiscuous mode [ 1050.047618][ T6833] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1050.059037][ T6833] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1050.078546][ T6833] team0: Port device team_slave_0 added [ 1050.085668][ T6833] team0: Port device team_slave_1 added [ 1050.101350][ T6833] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1050.108356][ T6833] 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. [ 1050.134356][ T6833] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1050.147063][ T6833] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1050.154099][ T6833] 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. [ 1050.180020][ T6833] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1050.250440][ T6833] device hsr_slave_0 entered promiscuous mode [ 1050.297599][ T6833] device hsr_slave_1 entered promiscuous mode [ 1050.424208][ T6833] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1050.460079][ T6833] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1050.499667][ T6833] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1050.569787][ T6833] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1050.633472][ T6833] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.640644][ T6833] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1050.648515][ T6833] bridge0: port 1(bridge_slave_0) entered blocking state [ 1050.655716][ T6833] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1050.699049][ T6833] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1050.712238][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1050.722602][ T2479] bridge0: port 1(bridge_slave_0) entered disabled state [ 1050.731032][ T2479] bridge0: port 2(bridge_slave_1) entered disabled state [ 1050.739330][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1050.752658][ T6833] 8021q: adding VLAN 0 to HW filter on device team0 [ 1050.763797][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1050.773506][ T6803] bridge0: port 1(bridge_slave_0) entered blocking state [ 1050.780644][ T6803] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1050.792317][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1050.801111][ T2479] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.808205][ T2479] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1050.828652][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1050.838358][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1050.847428][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1050.859885][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1050.872738][ T6833] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1050.885291][ T6833] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1050.894185][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1050.915926][ T6833] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1050.923124][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1050.932073][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1050.957313][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 1050.965880][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1050.982815][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1050.991951][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1051.002973][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1051.011674][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1051.020624][ T6833] device veth0_vlan entered promiscuous mode [ 1051.036915][ T6833] device veth1_vlan entered promiscuous mode [ 1051.063037][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1051.071174][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1051.079768][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1051.088738][ T6803] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1051.101075][ T6833] device veth0_macvtap entered promiscuous mode [ 1051.110319][ T6833] device veth1_macvtap entered promiscuous mode [ 1051.126491][ T6833] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1051.134015][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1051.143618][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1051.152235][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1051.161140][ T2479] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1051.173580][ T6833] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1051.181723][ T2489] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1051.191119][ T2489] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2020/07/14 00:20:09 executed programs: 155 2020/07/14 00:20:14 executed programs: 377 2020/07/14 00:20:19 executed programs: 612 2020/07/14 00:20:24 executed programs: 838 2020/07/14 00:20:29 executed programs: 1063 2020/07/14 00:20:34 executed programs: 1286 2020/07/14 00:20:39 executed programs: 1512 2020/07/14 00:20:44 executed programs: 1746 [ 1091.924677][ T1157] [ 1091.927157][ T1157] ====================================================== [ 1091.934166][ T1157] WARNING: possible circular locking dependency detected [ 1091.941299][ T1157] 5.8.0-rc5-syzkaller #0 Not tainted [ 1091.946573][ T1157] ------------------------------------------------------ [ 1091.953592][ T1157] khugepaged/1157 is trying to acquire lock: [ 1091.959563][ T1157] ffff88809272e910 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: shmem_fallocate+0x153/0xd90 [ 1091.969946][ T1157] [ 1091.969946][ T1157] but task is already holding lock: [ 1091.977292][ T1157] ffffffff89c6c260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x1554/0x2780 [ 1091.988041][ T1157] [ 1091.988041][ T1157] which lock already depends on the new lock. [ 1091.988041][ T1157] [ 1091.998419][ T1157] [ 1091.998419][ T1157] the existing dependency chain (in reverse order) is: [ 1092.007417][ T1157] [ 1092.007417][ T1157] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 1092.014706][ T1157] __alloc_pages_nodemask+0x3d1/0x930 [ 1092.020615][ T1157] alloc_pages_vma+0xdd/0x720 [ 1092.025795][ T1157] shmem_alloc_page+0x11f/0x1f0 [ 1092.031148][ T1157] shmem_alloc_and_acct_page+0x161/0x8a0 [ 1092.037282][ T1157] shmem_getpage_gfp+0x511/0x2450 [ 1092.042808][ T1157] shmem_write_begin+0xf9/0x1d0 [ 1092.048206][ T1157] generic_perform_write+0x20a/0x4f0 [ 1092.054005][ T1157] __generic_file_write_iter+0x24b/0x610 [ 1092.060137][ T1157] generic_file_write_iter+0x3a6/0x5c0 [ 1092.066151][ T1157] new_sync_write+0x422/0x650 [ 1092.071332][ T1157] vfs_write+0x59d/0x6b0 [ 1092.076118][ T1157] ksys_write+0x12d/0x250 [ 1092.081010][ T1157] do_syscall_64+0x60/0xe0 [ 1092.086060][ T1157] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1092.092447][ T1157] [ 1092.092447][ T1157] -> #0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}: [ 1092.101171][ T1157] __lock_acquire+0x2acb/0x56e0 [ 1092.106689][ T1157] lock_acquire+0x1f1/0xad0 [ 1092.111699][ T1157] down_write+0x8d/0x150 [ 1092.116442][ T1157] shmem_fallocate+0x153/0xd90 [ 1092.121969][ T1157] ashmem_shrink_scan.part.0+0x2e9/0x490 [ 1092.128101][ T1157] ashmem_shrink_scan+0x6c/0xa0 [ 1092.133453][ T1157] do_shrink_slab+0x3c6/0xab0 [ 1092.138632][ T1157] shrink_slab+0x16f/0x5c0 [ 1092.143566][ T1157] shrink_node+0x519/0x1b60 [ 1092.148687][ T1157] do_try_to_free_pages+0x38b/0x1340 [ 1092.154474][ T1157] try_to_free_pages+0x29a/0x8b0 [ 1092.159913][ T1157] __alloc_pages_slowpath.constprop.0+0x949/0x2780 [ 1092.166910][ T1157] __alloc_pages_nodemask+0x68f/0x930 [ 1092.172807][ T1157] khugepaged_alloc_page+0xa0/0x170 [ 1092.178521][ T1157] khugepaged+0x3093/0x5a10 [ 1092.183709][ T1157] kthread+0x3b5/0x4a0 [ 1092.188308][ T1157] ret_from_fork+0x1f/0x30 [ 1092.193340][ T1157] [ 1092.193340][ T1157] other info that might help us debug this: [ 1092.193340][ T1157] [ 1092.203680][ T1157] Possible unsafe locking scenario: [ 1092.203680][ T1157] [ 1092.211121][ T1157] CPU0 CPU1 [ 1092.216600][ T1157] ---- ---- [ 1092.222072][ T1157] lock(fs_reclaim); [ 1092.226030][ T1157] lock(&sb->s_type->i_mutex_key#15); [ 1092.234131][ T1157] lock(fs_reclaim); [ 1092.240606][ T1157] lock(&sb->s_type->i_mutex_key#15); [ 1092.246039][ T1157] [ 1092.246039][ T1157] *** DEADLOCK *** [ 1092.246039][ T1157] [ 1092.254164][ T1157] 2 locks held by khugepaged/1157: [ 1092.259251][ T1157] #0: ffffffff89c6c260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x1554/0x2780 [ 1092.270261][ T1157] #1: ffffffff89c46a90 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0xc7/0x5c0 [ 1092.279453][ T1157] [ 1092.279453][ T1157] stack backtrace: [ 1092.285336][ T1157] CPU: 0 PID: 1157 Comm: khugepaged Not tainted 5.8.0-rc5-syzkaller #0 [ 1092.293674][ T1157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1092.303740][ T1157] Call Trace: [ 1092.307059][ T1157] dump_stack+0x18f/0x20d [ 1092.311369][ T1157] check_noncircular+0x324/0x3e0 [ 1092.316289][ T1157] ? print_circular_bug+0x3a0/0x3a0 [ 1092.321473][ T1157] ? __bfs+0x75/0x530 [ 1092.325481][ T1157] ? find_first_zero_bit+0x94/0xb0 [ 1092.330715][ T1157] ? add_lock_to_list.constprop.0+0x148/0x480 [ 1092.336771][ T1157] __lock_acquire+0x2acb/0x56e0 [ 1092.341604][ T1157] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 1092.347568][ T1157] ? ret_from_fork+0x1f/0x30 [ 1092.352144][ T1157] lock_acquire+0x1f1/0xad0 [ 1092.356742][ T1157] ? shmem_fallocate+0x153/0xd90 [ 1092.361668][ T1157] ? lock_release+0x8d0/0x8d0 [ 1092.366323][ T1157] ? check_usage_forwards+0x4d0/0x4d0 [ 1092.371813][ T1157] ? arch_stack_walk+0x81/0xf0 [ 1092.376584][ T1157] ? __bfs+0x75/0x530 [ 1092.380554][ T1157] ? lock_is_held_type+0xb0/0xe0 [ 1092.385486][ T1157] down_write+0x8d/0x150 [ 1092.389709][ T1157] ? shmem_fallocate+0x153/0xd90 [ 1092.394625][ T1157] ? down_write_killable+0x170/0x170 [ 1092.399924][ T1157] shmem_fallocate+0x153/0xd90 [ 1092.404672][ T1157] ? __lock_acquire+0xc1e/0x56e0 [ 1092.409591][ T1157] ? shmem_evict_inode+0xbc0/0xbc0 [ 1092.414685][ T1157] ? find_held_lock+0x2d/0x110 [ 1092.419446][ T1157] ? ashmem_shrink_scan.part.0+0x29e/0x490 [ 1092.425323][ T1157] ? lock_downgrade+0x820/0x820 [ 1092.430431][ T1157] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 1092.436407][ T1157] ? __mutex_unlock_slowpath+0xe2/0x610 [ 1092.441942][ T1157] ? wait_for_completion+0x260/0x260 [ 1092.447201][ T1157] ? lock_downgrade+0x820/0x820 [ 1092.452059][ T1157] ashmem_shrink_scan.part.0+0x2e9/0x490 [ 1092.457675][ T1157] ? ashmem_shrink_scan+0x50/0xa0 [ 1092.462687][ T1157] ashmem_shrink_scan+0x6c/0xa0 [ 1092.467525][ T1157] do_shrink_slab+0x3c6/0xab0 [ 1092.472321][ T1157] shrink_slab+0x16f/0x5c0 [ 1092.476861][ T1157] ? do_shrink_slab+0xab0/0xab0 [ 1092.481709][ T1157] ? mem_cgroup_iter+0x34f/0x740 [ 1092.486715][ T1157] shrink_node+0x519/0x1b60 [ 1092.491219][ T1157] do_try_to_free_pages+0x38b/0x1340 [ 1092.496613][ T1157] ? shrink_node+0x1b60/0x1b60 [ 1092.501590][ T1157] ? sched_clock_cpu+0x18/0x1b0 [ 1092.506423][ T1157] ? lock_is_held_type+0xb0/0xe0 [ 1092.511346][ T1157] try_to_free_pages+0x29a/0x8b0 [ 1092.516267][ T1157] ? reclaim_pages+0xcd0/0xcd0 [ 1092.521148][ T1157] ? _raw_spin_unlock_irq+0x1f/0x80 [ 1092.526521][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 1092.532619][ T1157] __alloc_pages_slowpath.constprop.0+0x949/0x2780 [ 1092.539198][ T1157] ? lock_acquire+0x1f1/0xad0 [ 1092.543857][ T1157] ? warn_alloc+0x120/0x120 [ 1092.548494][ T1157] ? lock_downgrade+0x820/0x820 [ 1092.553332][ T1157] ? __zone_watermark_ok+0x370/0x370 [ 1092.558602][ T1157] ? lock_is_held_type+0xb0/0xe0 [ 1092.563527][ T1157] __alloc_pages_nodemask+0x68f/0x930 [ 1092.568979][ T1157] ? khugepaged+0xd20/0x5a10 [ 1092.573557][ T1157] ? find_held_lock+0x2d/0x110 [ 1092.578305][ T1157] ? __alloc_pages_slowpath.constprop.0+0x2780/0x2780 [ 1092.585097][ T1157] ? __up_read+0x1a1/0x7b0 [ 1092.589502][ T1157] ? _down_write_nest_lock+0x150/0x150 [ 1092.594986][ T1157] ? total_mapcount+0x1c3/0x570 [ 1092.599828][ T1157] khugepaged_alloc_page+0xa0/0x170 [ 1092.605167][ T1157] khugepaged+0x3093/0x5a10 [ 1092.609658][ T1157] ? collapse_pte_mapped_thp+0xb90/0xb90 [ 1092.615397][ T1157] ? __kthread_parkme+0xad/0x1e0 [ 1092.620320][ T1157] ? lock_downgrade+0x820/0x820 [ 1092.625242][ T1157] ? finish_wait+0x260/0x260 [ 1092.629933][ T1157] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 1092.635720][ T1157] ? __kthread_parkme+0x4c/0x1e0 [ 1092.640638][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 1092.646600][ T1157] ? __kthread_parkme+0x13f/0x1e0 [ 1092.651601][ T1157] ? collapse_pte_mapped_thp+0xb90/0xb90 [ 1092.657226][ T1157] kthread+0x3b5/0x4a0 [ 1092.661277][ T1157] ? __kthread_bind_mask+0xc0/0xc0 [ 1092.666370][ T1157] ? __kthread_bind_mask+0xc0/0xc0 [ 1092.671464][ T1157] ret_from_fork+0x1f/0x30 2020/07/14 00:20:49 executed programs: 1956 2020/07/14 00:20:54 executed programs: 2217