INFO: task syz-executor.5:2591 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. syz-executor.5 D27184 2591 8123 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 usb_start_wait_urb+0x14b/0x4c0 drivers/usb/core/message.c:62 IPVS: ftp: loaded support on port[0] = 21 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253 proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1211 usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2435 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4efb1345a9 Code: Bad RIP value. RSP: 002b:00007f4ef9aa7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f4efb254f80 RCX: 00007f4efb1345a9 RDX: 0000000020000180 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007f4efb18f580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5b7a770f R14: 00007f4ef9aa7300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000ae3ceb14 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 3 locks held by kworker/1:2/4705: #0: 00000000368c9cf7 ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000072b9a3d1 ((work_completion)(&map->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000037126052 (rcu_preempt_state.barrier_mutex){+.+.}, at: _rcu_barrier+0x59/0x3e0 kernel/rcu/tree.c:3430 1 lock held by in:imklog/7815: #0: 00000000ff51ec96 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by rs:main Q:Reg/7816: 2 locks held by agetty/8033: #0: 000000007385fd22 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000009e3b8993 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 3 locks held by syz-executor.3/8124: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000d16244e6 (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 00000000d16244e6 (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x15a/0x490 fs/namei.c:3638 #2: 00000000ae3ceb14 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #2: 00000000ae3ceb14 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 4 locks held by syz-executor.1/8126: #0: 000000000c72b45c (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000000c72b45c (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 0000000074026604 (pool_lock){-.-.}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 0000000074026604 (pool_lock){-.-.}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 00000000ea5d6773 (rcu_read_lock_sched){....}, at: scsi_end_request+0x443/0xb60 drivers/scsi/scsi_lib.c:710 #3: 000000004bf15d17 (&p->pi_lock){-.-.}, at: try_to_wake_up+0x7b/0x1050 kernel/sched/core.c:1961 2 locks held by syz-executor.0/26729: 1 lock held by syz-executor.4/7790: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 2 locks held by syz-executor.2/7832: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 #1: 000000000c72b45c (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #1: 000000000c72b45c (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 2 locks held by syz-executor.0/7895: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 #1: 0000000015d06c44 (&sbi->s_writepages_rwsem){++++}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/7898: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 2 locks held by syz-executor.2/7945: 3 locks held by syz-executor.5/7970: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 #1: 000000000c72b45c (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #1: 000000000c72b45c (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #2: 000000000c72b45c (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #2: 000000000c72b45c (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 1 lock held by syz-executor.2/8067: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 1 lock held by syz-executor.5/8189: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: do_coredump+0x2083/0x2d60 fs/coredump.c:764 3 locks held by syz-executor.3/8221: #0: 000000007cc0099b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000007cc0099b (sb_writers#3){.+.+}, at: vfs_fallocate+0x7c0/0x9a0 fs/open.c:307 #1: 00000000f59062aa (&sb->s_type->i_mutex_key#10){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000f59062aa (&sb->s_type->i_mutex_key#10){++++}, at: ext4_fallocate+0x25b/0x2150 fs/ext4/extents.c:4983 #2: 00000000a3a80fca (&ei->i_data_sem){++++}, at: ext4_map_blocks+0x740/0x1a50 fs/ext4/inode.c:650 3 locks held by syz-executor.5/8223: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 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: 9375 Comm: kworker/u4:7 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:188 Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 ec fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 ce fe ff ff 66 66 2e 0f 1f 84 00 00 RSP: 0018:ffff888050ab7bb8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff87d516c6 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8880afcf36c0 R14: 00000000000000ac R15: ffff8880afcf3760 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ebd848 CR3: 000000009d0f6000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:677 [inline] batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:954 [inline] batadv_iv_ogm_schedule_buff+0x766/0x1340 net/batman-adv/bat_iv_ogm.c:1008 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1052 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1045 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x68c/0x7a0 net/batman-adv/bat_iv_ogm.c:1871 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