INFO: task syz.6.612:7289 blocked for more than 144 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.612 state:D stack:0 pid:7289 tgid:7281 ppid:6623 task_flags:0x400040 flags:0x00800001 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1bec/0x2dcc kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x140/0x218 kernel/sched/core.c:7283 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340 rwsem_down_write_slowpath+0x6b8/0x113c kernel/locking/rwsem.c:1215 __down_write_common kernel/locking/rwsem.c:1347 [inline] __down_write kernel/locking/rwsem.c:1356 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1626 filemap_invalidate_lock include/linux/fs.h:1084 [inline] blkdev_fallocate+0x22c/0x354 block/fops.c:908 vfs_fallocate+0x514/0x650 fs/open.c:338 madvise_remove mm/madvise.c:1039 [inline] madvise_vma_behavior+0x2778/0x3440 mm/madvise.c:1352 madvise_walk_vmas+0x4b4/0x9a4 mm/madvise.c:1713 madvise_do_behavior+0x5f4/0x7c4 mm/madvise.c:1929 do_madvise+0x1ac/0x278 mm/madvise.c:2022 __do_sys_madvise mm/madvise.c:2031 [inline] __se_sys_madvise mm/madvise.c:2029 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:2029 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 3 locks held by kworker/0:0/9: #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80008ea87c40 (rx_mode_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80008ea87c40 (rx_mode_work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by khungtaskd/31: #0: ffff800088b67320 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088b67320 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088b67320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by kworker/0:2/867: 1 lock held by dhcpcd/4393: #0: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/4486: #0: ffff0000d42d30a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009232e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211 2 locks held by kworker/0:5/4914: 3 locks held by kworker/u8:12/5652: #0: ffff0000ceefe940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000ceefe940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff8000985f7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000985f7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 6 locks held by kworker/u8:47/5697: #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800099407c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800099407c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c30388 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x100/0x6b8 net/core/net_namespace.c:673 #3: ffff0000da107128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #3: ffff0000da107128 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline] #3: ffff0000da107128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0xfc/0x30c net/devlink/core.c:557 #4: ffff0000d10a3258 (&devlink->lock_key#9){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:292 [inline] #4: ffff0000d10a3258 (&devlink->lock_key#9){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline] #4: ffff0000d10a3258 (&devlink->lock_key#9){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x110/0x30c net/devlink/core.c:557 #5: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/u8:49/5699: 3 locks held by kworker/u8:50/5701: 2 locks held by kworker/u8:51/5702: #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800098377c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800098377c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 3 locks held by kworker/u8:52/5704: #0: ffff0000c004c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800098347c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800098347c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.6.612/7285: 2 locks held by syz.6.612/7288: 2 locks held by syz.6.612/7289: #0: ffff0000c1556f78 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #0: ffff0000c1556f78 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x208/0x354 block/fops.c:907 #1: ffff0000c1557110 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1084 [inline] #1: ffff0000c1557110 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x22c/0x354 block/fops.c:908 2 locks held by syz-executor/7793: 1 lock held by syz-executor/7796: #0: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x38/0x10c net/core/rtnetlink.c:341 3 locks held by syz-executor/7964: 2 locks held by syz.0.732/8029: 2 locks held by syz.2.736/8043: #0: ffff0000f206a4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #0: ffff0000f206a4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x7c/0x1d4 net/socket.c:721 #1: ffff800088b6c928 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #1: ffff800088b6c928 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x34c/0x67c kernel/rcu/tree_exp.h:961 1 lock held by syz.2.736/8047: #0: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.2.736/8048: #0: ffff800089c3d880 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by modprobe/8046: =============================================