syzkaller login: [ 100.810200][ T2048] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.819597][ T2048] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.849747][ T2048] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:51797' (ECDSA) to the list of known hosts. [ 126.256026][ T9] ------------[ cut here ]------------ [ 126.258715][ T9] WARNING: CPU: 1 PID: 9 at include/linux/cpumask.h:110 __blk_mq_delay_run_hw_queue+0x490/0x664 [ 126.267556][ T9] Modules linked in: [ 126.269491][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Tainted: G W 6.0.0-syzkaller-11546-g1440f5760228 #0 [ 126.270688][ T9] Hardware name: linux,dummy-virt (DT) [ 126.271849][ T9] Workqueue: writeback wb_workfn (flush-253:0) [ 126.273554][ T9] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 126.274295][ T9] pc : __blk_mq_delay_run_hw_queue+0x490/0x664 [ 126.275437][ T9] lr : blk_mq_run_hw_queue+0x1f0/0x2d4 [ 126.278066][ T9] sp : ffff800010b862a0 [ 126.278534][ T9] x29: ffff800010b862a0 x28: ffff00001173a134 x27: ffff80000de5c000 [ 126.279396][ T9] x26: ffff00001173a130 x25: 0000000000000000 x24: 1fffe000022e7426 [ 126.280093][ T9] x23: fffffbffefff6100 x22: 0000000000000000 x21: 0000000000000002 [ 126.280906][ T9] x20: 0000000000000000 x19: ffff00001173a000 x18: ffff00006a9eab88 [ 126.287713][ T9] x17: 0000000000000000 x16: 00000000f1f1f1f1 x15: ffff800008935178 [ 126.288428][ T9] x14: 1ffff00002170c32 x13: 0000000000000000 x12: ffff6000022e7409 [ 126.289911][ T9] x11: 1fffe000022e7408 x10: ffff6000022e7408 x9 : dfff800000000000 [ 126.292185][ T9] x8 : ffff00001173a047 x7 : ffff80000de5cb68 x6 : ffff80000de5cd50 [ 126.293116][ T9] x5 : 1fffe000022e7426 x4 : 0000000000000004 x3 : 1fffe000021e56cd [ 126.293818][ T9] x2 : 0000000000000002 x1 : 0000000000000000 x0 : 0000000000000003 [ 126.294276][ T9] Call trace: [ 126.294519][ T9] __blk_mq_delay_run_hw_queue+0x490/0x664 [ 126.294920][ T9] blk_mq_run_hw_queue+0x1f0/0x2d4 [ 126.295240][ T9] blk_mq_sched_insert_requests+0x200/0x870 [ 126.295536][ T9] blk_mq_flush_plug_list+0x2a8/0xd00 [ 126.295855][ T9] __blk_flush_plug+0x74/0x160 [ 126.296195][ T9] io_schedule+0xa8/0x114 [ 126.296538][ T9] bit_wait_io+0x18/0xbc [ 126.296814][ T9] __wait_on_bit_lock+0x134/0x240 [ 126.297098][ T9] out_of_line_wait_on_bit_lock+0xd0/0x110 [ 126.297446][ T9] __lock_buffer+0x5c/0x90 [ 126.297775][ T9] do_get_write_access+0x3b4/0x10a4 [ 126.298142][ T9] jbd2_journal_get_write_access+0xec/0x15c [ 126.298451][ T9] __ext4_journal_get_write_access+0x150/0x3f0 [ 126.298818][ T9] ext4_mb_mark_diskspace_used+0x198/0xfbc [ 126.299126][ T9] ext4_mb_new_blocks+0xcb0/0x47c0 [ 126.299568][ T9] ext4_ext_map_blocks+0x1ac4/0x5610 [ 126.299955][ T9] ext4_map_blocks+0x4fc/0x1250 [ 126.300419][ T9] ext4_writepages+0x1440/0x2b20 [ 126.300726][ T9] do_writepages+0x140/0x4c0 [ 126.301224][ T9] __writeback_single_inode+0x140/0x18e4 [ 126.301723][ T9] writeback_sb_inodes+0x3d0/0xd10 [ 126.302017][ T9] __writeback_inodes_wb+0xb8/0x1f0 [ 126.302419][ T9] wb_writeback+0x9d4/0xef4 [ 126.302892][ T9] wb_workfn+0x7ac/0x1514 [ 126.303165][ T9] process_one_work+0x780/0x184c [ 126.303442][ T9] worker_thread+0x3cc/0xc40 [ 126.303742][ T9] kthread+0x23c/0x2a0 [ 126.304078][ T9] ret_from_fork+0x10/0x20 [ 126.304386][ T9] irq event stamp: 169154 [ 126.304634][ T9] hardirqs last enabled at (169153): [] _raw_spin_unlock_irqrestore+0x90/0xc0 [ 126.305007][ T9] hardirqs last disabled at (169154): [] el1_dbg+0x24/0x80 [ 126.305444][ T9] softirqs last enabled at (169120): [] _stext+0x9d4/0x107c [ 126.305765][ T9] softirqs last disabled at (169109): [] ____do_softirq+0x10/0x20 [ 126.306183][ T9] ---[ end trace 0000000000000000 ]--- 1970/01/01 00:02:09 fuzzer started 1970/01/01 00:02:13 connecting to host at localhost:35311 1970/01/01 00:02:14 checking machine... 1970/01/01 00:02:14 checking revisions... 1970/01/01 00:02:16 testing simple program... [ 137.329838][ T2208] cgroup: Unknown subsys name 'net' executing program [ 137.839189][ T2208] cgroup: Unknown subsys name 'rlimit' executing program executing program [ 144.786413][ T2211] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 144.859865][ T2211] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 147.637466][ T2211] device hsr_slave_0 entered promiscuous mode [ 147.739139][ T2211] device hsr_slave_1 entered promiscuous mode executing program [ 149.762904][ T2211] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 149.857127][ T2211] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 149.948404][ T2211] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 150.058250][ T2211] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 152.180068][ T2211] 8021q: adding VLAN 0 to HW filter on device bond0 [ 152.270580][ T13] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 152.298330][ T13] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 153.517923][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 153.533765][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 153.597957][ T13] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 153.620292][ T13] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 153.720818][ T13] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 153.840374][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 154.068849][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 154.083704][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 154.151051][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 154.171318][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 154.218837][ T2211] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 155.388682][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 155.390736][ T90] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program VM DIAGNOSIS: 19:45:46 Registers: info registers vcpu 0 PC=ffff8000082a3000 X00=0000000000000080 X01=0000000000000060 X02=0000000000000000 X03=1fffe0000266c369 X04=00000000f204f1f1 X05=0000000000000000 X06=ffff8000088fcd80 X07=ffff000013361b40 X08=ffff80000de5cd50 X09=ffff80000de5c000 X10=dfff800000000000 X11=0000000000000004 X12=1fffe0000266c4a1 X13=1fffe0000266c4a9 X14=1ffff0000311ceb4 X15=0000000007000000 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=1ffff0000311cf60 X20=0000000000000002 X21=ffff80000e03ca80 X22=0000000000000028 X23=ffff000010382000 X24=ffff80000de06c48 X25=0000000000000020 X26=ffff00000eb0c7c8 X27=0000000000000000 X28=ffff000013361b40 X29=ffff8000188e7a60 X30=ffff80000c8f08b4 SP=ffff8000188e7a30 PSTATE=700000c5 -ZCV EL1h FPCR=00000000 FPSR=00000000 Q00=2f2f2f2f2f2f2f2f:2f2f2f2f2f2f2f2f Q01=2e6f732e6362696c:0036317465675f73 Q02=6f6972705f746567:5f64656863730036 Q03=0000000000000000:8000000000000000 Q04=0000000000000000:0000000000000800 Q05=0000000000000000:0000000000000000 Q06=0000000000000000:0000000000000000 Q07=8020080280200802:8020080280200802 Q08=0000000000000000:0000000000000000 Q09=0000000000000000:0000000000000000 Q10=0000000000000000:0000000000000000 Q11=0000000000000000:0000000000000000 Q12=0000000000000000:0000000000000000 Q13=0000000000000000:0000000000000000 Q14=0000000000000000:0000000000000000 Q15=0000000000000000:0000000000000000 Q16=4010040140100401:4010040140100401 Q17=0000000000000008:0000000800008000 Q18=0000000000000000:0000000000000800 Q19=0000000000000000:0000000000000000 Q20=0000000000000000:0000000000000000 Q21=0000000000000000:0000000000000000 Q22=0000000000000000:0000000000000000 Q23=0000000000000000:0000000000000000 Q24=0000000000000000:0000000000000000 Q25=0000000000000000:0000000000000000 Q26=0000000000000000:0000000000000000 Q27=0000000000000000:0000000000000000 Q28=0000000000000000:0000000000000000 Q29=0000000000000000:0000000000000000 Q30=0000000000000000:0000000000000000 Q31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000082a38f4 X00=00000000000003c0 X01=00000000000003c0 X02=0000000000000000 X03=1fffe0000d53d589 X04=0000000005b5c8ae X05=0000000000000000 X06=00000000f3f3f3f3 X07=1fffe00001245164 X08=ffff000009228b20 X09=0000000000000118 X10=ffff0000092289cc X11=0000000000000007 X12=1fffe00001245139 X13=0000000000000000 X14=1ffff00002170b18 X15=2e6b73616d757063 X16=5f5f203031313a68 X17=645f716d5f6b6c62 X18=ffff00006a9eab88 X19=1ffff00002170b36 X20=ffff80000de06c48 X21=ffff80000de06c48 X22=ffff80005cbe4000 X23=0000000000000001 X24=ffff80000df4f158 X25=0000000000000000 X26=0000000000000000 X27=ffff8000082c44f0 X28=ffff80000c991f40 X29=ffff800010b85930 X30=ffff8000082a38a4 SP=ffff800010b85920 PSTATE=100003c5 ---V EL1h FPCR=00000000 FPSR=00000000 Q00=0000000000000000:0000000000000000 Q01=7325407325206d6f:7266207325204143 Q02=6275702073252064:6574706563634100 Q03=0000000000000000:0000000000000000 Q04=0000000000000000:00000000000000ff Q05=0010000040000000:0000000040000000 Q06=0000000000100000:0000000000000001 Q07=4010040140100401:4010040140100401 Q08=0000000000000000:0000000000000000 Q09=0000000000000000:0000000000000000 Q10=0000000000000000:0000000000000000 Q11=0000000000000000:0000000000000000 Q12=0000000000000000:0000000000000000 Q13=0000000000000000:0000000000000000 Q14=0000000000000000:0000000000000000 Q15=0000000000000000:0000000000000000 Q16=0010000110400040:0010000110400040 Q17=bda0c4af927061cd:01f19697591371a7 Q18=2f4460efec7fd20b:bbc528febc713b88 Q19=66e429d03bc9f277:843074ae3e4bfd77 Q20=1041bd44f7b20a0f:f751945b6b1d5ea3 Q21=67c0a97e410a6b85:c10c0908e24ec056 Q22=97ce64583bb26a29:20a175d852bff2a9 Q23=95cb0346ed81ff70:a50c96ea3a51626c Q24=6b20657479622d32:3320646e61707865 Q25=aebb983cf437671c:966f9a24122091c7 Q26=4cc012d3eb74957c:958935e9724ab571 Q27=0800000000000000:0000000000000002 Q28=0800000000000000:0000000000000003 Q29=0800000000000000:0000000000000004 Q30=0000000000000000:0000000000000000 Q31=0000000000000000:0000000000000004