BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 9364 Comm: kworker/u4:7 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 add_chain_cache kernel/locking/lockdep.c:2259 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2371 [inline] validate_chain kernel/locking/lockdep.c:2391 [inline] __lock_acquire.cold+0x420/0x57e kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 update_cfs_rq_load_avg kernel/sched/fair.c:3490 [inline] update_load_avg kernel/sched/fair.c:3612 [inline] dequeue_entity+0x52d/0x2800 kernel/sched/fair.c:4058 dequeue_task_fair+0x68/0x1b60 kernel/sched/fair.c:5241 __schedule+0x2d6/0x2040 kernel/sched/core.c:3467 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 mpage_map_and_submit_extent fs/ext4/inode.c:2584 [inline] ext4_writepages+0x2766/0x37f0 fs/ext4/inode.c:2882 do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __writeback_single_inode+0x10c/0x11d0 fs/fs-writeback.c:1385 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 wb_writeback+0x28d/0xcc0 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1965 [inline] wb_workfn+0x29b/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 overlayfs: unrecognized mount option "index=ogf" or missing value overlayfs: filesystem on './bus' not supported as upperdir audit: type=1804 audit(1678136925.401:1134): pid=4610 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3701051260/syzkaller.Kxq4pN/324/bus" dev="sda1" ino=14340 res=1 audit: type=1804 audit(1678136925.441:1135): pid=4610 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3701051260/syzkaller.Kxq4pN/324/bus" dev="sda1" ino=14340 res=1 overlayfs: unrecognized mount option "index=ogf" or missing value audit: type=1804 audit(1678136926.421:1136): pid=4688 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3701051260/syzkaller.Kxq4pN/325/bus" dev="sda1" ino=14148 res=1 audit: type=1804 audit(1678136926.461:1137): pid=4675 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3701051260/syzkaller.Kxq4pN/325/bus" dev="sda1" ino=14148 res=1 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready audit: type=1800 audit(1678136927.512:1138): pid=4736 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name=".log" dev="sda1" ino=13988 res=0 audit: type=1800 audit(1678136927.732:1139): pid=4764 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name=".log" dev="sda1" ino=14213 res=0 IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1678136928.122:1140): pid=4789 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name=".log" dev="sda1" ino=14372 res=0 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 device lo entered promiscuous mode ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 Y4`Ҙ: renamed from lo netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. capability: warning: `syz-executor.3' uses deprecated v2 capabilities in a way that may be insecure IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 1 IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1678136935.002:1141): pid=5440 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/574/bus" dev="sda1" ino=14072 res=1 chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected audit: type=1804 audit(1678136935.032:1142): pid=5440 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/574/bus" dev="sda1" ino=14072 res=1 A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. audit: type=1804 audit(1678136935.392:1143): pid=5462 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir1073901352/syzkaller.g8IGw9/549/file0" dev="sda1" ino=14867 res=1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. audit: type=1804 audit(1678136935.652:1144): pid=5477 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir1073901352/syzkaller.g8IGw9/550/file0" dev="sda1" ino=15123 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1678136935.832:1145): pid=5494 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir1073901352/syzkaller.g8IGw9/551/file0" dev="sda1" ino=15123 res=1 audit: type=1804 audit(1678136935.892:1146): pid=5498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/575/bus" dev="sda1" ino=14817 res=1 audit: type=1804 audit(1678136935.892:1147): pid=5498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/575/bus" dev="sda1" ino=14817 res=1 audit: type=1804 audit(1678136935.892:1148): pid=5498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/575/bus" dev="sda1" ino=14817 res=1 audit: type=1804 audit(1678136935.902:1149): pid=5498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/575/bus" dev="sda1" ino=14817 res=1 audit: type=1804 audit(1678136935.902:1150): pid=5498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir696481677/syzkaller.83retw/575/bus" dev="sda1" ino=14817 res=1 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. overlayfs: unrecognized mount option "" or missing value IPVS: ftp: loaded support on port[0] = 21 overlayfs: unrecognized mount option "" or missing value IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 105 callbacks suppressed audit: type=1804 audit(1678136941.502:1256): pid=5975 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1598480696/syzkaller.UJbflT/524/file1" dev="sda1" ino=14039 res=1 overlayfs: unrecognized mount option "up0erdir=./bus" or missing value audit: type=1804 audit(1678136941.682:1257): pid=6009 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1598480696/syzkaller.UJbflT/525/file1" dev="sda1" ino=15032 res=1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21