INFO: task segctord:5401 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. segctord D30376 5401 2 0x80000000 Call Trace: netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. 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 nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2479 [inline] nilfs_segctor_thread+0x3c0/0xf50 fs/nilfs2/segment.c:2563 IPVS: ftp: loaded support on port[0] = 21 kthread+0x33f/0x460 kernel/kthread.c:259 audit: type=1804 audit(1674847296.045:478): pid=8121 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1298349726/syzkaller.F1XCxs/1305/bus" dev="sda1" ino=14591 res=1 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 3 locks held by kworker/u4:1/23: audit: type=1804 audit(1674847296.085:479): pid=8190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir1298349726/syzkaller.F1XCxs/1305/bus" dev="sda1" ino=14591 res=1 1 lock held by khungtaskd/1569: #0: 000000007e8530b2 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 3 locks held by systemd-udevd/4696: 1 lock held by in:imklog/7811: #0: 000000003ab90c80 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by syz-executor.3/8174: 6 locks held by kworker/u4:11/16364: #0: 0000000002ca6a46 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000000e6afb5d (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000f920413c (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 #3: 0000000007a28ee9 (rtnl_mutex){+.+.}, at: caif_exit_net+0x38/0x450 net/caif/caif_dev.c:522 #4: 00000000de03322d (&caifn->caifdevs.lock){+.+.}, at: caif_exit_net+0x4f/0x450 net/caif/caif_dev.c:523 #5: 000000004a123273 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #5: 000000004a123273 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 4 locks held by syz-executor.4/5373: 1 lock held by segctord/5401: #0: 0000000062940c4f (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 5 locks held by syz-executor.2/5642: 1 lock held by segctord/5670: #0: 00000000d7c7e427 (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 audit: type=1800 audit(1674847296.895:480): pid=8131 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14052 res=0 2 locks held by syz-executor.2/8131: #0: 00000000da2668b1 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000da2668b1 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 #1: 000000003ec56656 (&sb->s_type->i_mutex_key#10){++++}, at: inode_trylock include/linux/fs.h:768 [inline] #1: 000000003ec56656 (&sb->s_type->i_mutex_key#10){++++}, at: ext4_file_write_iter+0x21f/0xf20 fs/ext4/file.c:238 audit: type=1800 audit(1674847297.005:481): pid=8238 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14052 res=0 2 locks held by syz-executor.2/8238: #0: 00000000a362d485 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000a362d485 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 0000000058fdcfa2 (&cfs_rq->removed.lock){-.-.}, at: update_cfs_rq_load_avg kernel/sched/fair.c:3490 [inline] #1: 0000000058fdcfa2 (&cfs_rq->removed.lock){-.-.}, at: update_load_avg kernel/sched/fair.c:3612 [inline] #1: 0000000058fdcfa2 (&cfs_rq->removed.lock){-.-.}, at: dequeue_entity+0x52d/0x2800 kernel/sched/fair.c:4058 3 locks held by syz-executor.1/8215: #0: 000000000310be63 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 000000000310be63 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598 #1: 00000000b55d70e5 (sk_lock-AF_PPPOX){+.+.}, at: lock_sock include/net/sock.h:1512 [inline] #1: 00000000b55d70e5 (sk_lock-AF_PPPOX){+.+.}, at: pptp_release+0x49/0x200 drivers/net/ppp/pptp.c:510 #2: 000000004a123273 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #2: 000000004a123273 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.5/8216: #0: 0000000007a28ee9 (rtnl_mutex){+.+.}, at: tun_detach drivers/net/tun.c:759 [inline] #0: 0000000007a28ee9 (rtnl_mutex){+.+.}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3323 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9906 Comm: kworker/u4:8 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy10 ieee80211_iface_work RIP: 0010:debug_object_activate+0x385/0x450 lib/debugobjects.c:513 Code: 85 da fe ff ff 41 bd ea ff ff ff e9 3f fd ff ff 8b 05 67 c8 af 07 85 c0 74 0d 31 d2 4c 89 fe 4c 89 e7 e8 fe e8 ff ff 4c 89 fe <4c> 89 e7 45 31 ed e8 70 fc ff ff e9 15 fd ff ff 4c 89 4c 24 08 4c RSP: 0018:ffff88803dc97250 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff89f85e80 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b28b3c88 R13: ffffffff8d396580 R14: 1ffff11007b92e4c R15: ffffffff89f85e80 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff747624000 CR3: 00000000a1ba1000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_rcu_head_queue kernel/rcu/rcu.h:193 [inline] __call_rcu.constprop.0+0x31/0x7f0 kernel/rcu/tree.c:2977 cfg80211_bss_update+0x47a/0x2590 net/wireless/scan.c:967 cfg80211_inform_bss_frame_data+0x69c/0xeb0 net/wireless/scan.c:1283 ieee80211_bss_info_update+0x42d/0x1800 net/mac80211/scan.c:105 ieee80211_rx_bss_info net/mac80211/ibss.c:1125 [inline] ieee80211_rx_mgmt_probe_beacon+0xb4f/0x15c0 net/mac80211/ibss.c:1607 ieee80211_ibss_rx_queued_mgmt+0xe27/0x18b0 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 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