INFO: task syz.4.5:4134 blocked for more than 146 seconds. Not tainted 5.15.168-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.5 state:D stack: 0 pid: 4134 ppid: 4037 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 io_schedule+0x8c/0x194 kernel/sched/core.c:8481 wait_on_page_bit_common+0x6fc/0xc14 mm/filemap.c:1356 __lock_page+0x8c/0xa8 mm/filemap.c:1648 lock_page include/linux/pagemap.h:625 [inline] pickup_page_for_submission fs/erofs/zdata.c:1135 [inline] z_erofs_submit_queue fs/erofs/zdata.c:1306 [inline] z_erofs_runqueue+0x610/0x1474 fs/erofs/zdata.c:1367 z_erofs_readahead+0x864/0xc98 fs/erofs/zdata.c:1459 read_pages+0x13c/0x420 mm/readahead.c:130 page_cache_ra_unbounded+0x534/0x654 mm/readahead.c:239 do_page_cache_ra mm/readahead.c:269 [inline] force_page_cache_ra+0x320/0x388 mm/readahead.c:301 force_page_cache_readahead mm/internal.h:59 [inline] generic_fadvise+0x490/0x750 mm/fadvise.c:107 vfs_fadvise mm/fadvise.c:186 [inline] ksys_fadvise64_64 mm/fadvise.c:200 [inline] __do_sys_fadvise64_64 mm/fadvise.c:208 [inline] __se_sys_fadvise64_64 mm/fadvise.c:206 [inline] __arm64_sys_fadvise64_64+0x12c/0x174 mm/fadvise.c:206 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014c822e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 3 locks held by kworker/u4:3/293: 2 locks held by getty/3789: #0: ffff0000d379e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bff02e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158 1 lock held by syz.4.5/4134: #0: ffff0000e69f8320 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:844 [inline] #0: ffff0000e69f8320 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x158/0x654 mm/readahead.c:195 2 locks held by kworker/1:7/4200: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff800021517c00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 2 locks held by kworker/u4:13/4398: 3 locks held by kworker/u4:16/4851: 2 locks held by syz-executor/5732: #0: ffff0000cbd98d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xe0/0x6b0 block/bdev.c:912 #1: ffff0000cbdf4468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa8/0x9b8 drivers/block/loop.c:1365 1 lock held by syz.2.590/6347: #0: ffff0000e69f8da0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:844 [inline] #0: ffff0000e69f8da0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x158/0x654 mm/readahead.c:195 1 lock held by syz-executor/6511: #0: ffff800016be3aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff800016be3aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac net/core/rtnetlink.c:5644 1 lock held by syz.0.648/6548: #0: ffff800014c868e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #0: ffff800014c868e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2f0/0x660 kernel/rcu/tree_exp.h:845 1 lock held by syz-executor/6551: #0: ffff800014c868e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #0: ffff800014c868e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2f0/0x660 kernel/rcu/tree_exp.h:845 =============================================