INFO: task syz.3.4:6504 blocked for more than 143 seconds. Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4 state:D stack:0 pid:6504 tgid:6503 ppid:6418 flags:0x00000001 Call trace: __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 io_schedule+0x8c/0x124 kernel/sched/core.c:7401 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1307 __folio_lock+0x2c/0x3c mm/filemap.c:1645 folio_lock include/linux/pagemap.h:1050 [inline] z_erofs_fill_bio_vec fs/erofs/zdata.c:1470 [inline] z_erofs_submit_queue fs/erofs/zdata.c:1650 [inline] z_erofs_runqueue+0x838/0x17ec fs/erofs/zdata.c:1732 z_erofs_readahead+0x858/0xc18 fs/erofs/zdata.c:1863 read_pages+0x160/0x694 mm/readahead.c:160 page_cache_ra_unbounded+0x484/0x584 mm/readahead.c:273 do_page_cache_ra mm/readahead.c:303 [inline] force_page_cache_ra+0x22c/0x290 mm/readahead.c:332 force_page_cache_readahead mm/internal.h:338 [inline] generic_fadvise+0x3e8/0x6a0 mm/fadvise.c:106 vfs_fadvise mm/fadvise.c:185 [inline] ksys_fadvise64_64 mm/fadvise.c:199 [inline] __do_sys_fadvise64_64 mm/fadvise.c:207 [inline] __se_sys_fadvise64_64 mm/fadvise.c:205 [inline] __arm64_sys_fadvise64_64+0x12c/0x174 mm/fadvise.c:205 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 4 locks held by kworker/u8:0/11: #0: ffff0000c1869948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000975b7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff80009242b950 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0x9b4 net/core/net_namespace.c:594 #3: ffff80008f7531c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:4486 1 lock held by khungtaskd/31: #0: ffff80008f74dfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325 3 locks held by kworker/u8:4/138: #0: ffff0000d1cfb948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009b5d7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff800092437ee8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/u8:9/4317: 2 locks held by getty/6173: #0: ffff0000d259b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b55b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:5/6463: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000aeaf7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0001b369ad18 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x230 kernel/time/timer.c:1051 1 lock held by syz.3.4/6504: #0: ffff0000df364330 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:855 [inline] #0: ffff0000df364330 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x584 mm/readahead.c:225 1 lock held by syz-executor/8351: 2 locks held by syz-executor/8797: #0: ffff800092437ee8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800092437ee8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6644 #1: ffff80008f7532f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline] #1: ffff80008f7532f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x354/0x674 kernel/rcu/tree_exp.h:958 4 locks held by syz-executor/8801: #0: ffff0000d8280420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000d8280420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x368/0xc80 fs/read_write.c:586 #1: ffff0000d4dfbc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000cbfce5a8 (kn->active#46){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff800091592148 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x170/0x704 drivers/net/netdevsim/bus.c:166 7 locks held by syz-executor/8802: #0: ffff0000d8280420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000d8280420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x368/0xc80 fs/read_write.c:586 #1: ffff0000d480c488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000cbfce698 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff800091592148 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216 #4: ffff0000d36ce0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #4: ffff0000d36ce0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline] #4: ffff0000d36ce0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x698 drivers/base/dd.c:1292 #5: ffff0000d36cf250 (&devlink->lock_key#14){+.+.}-{3:3}, at: devl_lock+0x24/0x34 net/devlink/core.c:276 #6: ffff80008f7531c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:4486 1 lock held by syz.2.412/8958: 1 lock held by sed/8960: =============================================