INFO: task syz.5.282:5620 blocked for more than 143 seconds. Not tainted 5.15.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.5.282 state:D stack: 0 pid: 5620 ppid: 4198 flags:0x00000009 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xe00/0x1c0c kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 wait_on_state fs/btrfs/extent_io.c:868 [inline] wait_extent_bit+0x370/0x4b4 fs/btrfs/extent_io.c:906 lock_extent_bits+0x8c/0x130 fs/btrfs/extent_io.c:1469 btrfs_page_mkwrite+0x608/0xcf0 fs/btrfs/inode.c:8961 do_page_mkwrite+0x13c/0x358 mm/memory.c:2922 wp_page_shared+0x14c/0x398 mm/memory.c:3259 do_wp_page+0x7c0/0x994 mm/memory.c:3360 handle_pte_fault mm/memory.c:4668 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1770/0x2950 mm/memory.c:4883 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x694/0xad4 arch/arm64/mm/fault.c:605 do_mem_abort+0x6c/0x1ac arch/arm64/mm/fault.c:819 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:418 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:522 __arch_copy_to_user+0x88/0x218 arch/arm64/lib/copy_template.S:90 emit_fiemap_extent fs/btrfs/extent_io.c:5460 [inline] extent_fiemap+0xce0/0xf0c fs/btrfs/extent_io.c:5686 btrfs_fiemap+0xd0/0x124 fs/btrfs/inode.c:8584 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18d8/0x2370 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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: ffff8000143211e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 4 locks held by kworker/u4:5/1614: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff8000239b7c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff80001626c890 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa98 net/core/net_namespace.c:589 #3: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 2 locks held by getty/3790: #0: ffff0000d42a8098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bb7e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 3 locks held by kworker/0:6/4077: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f7c7c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff0000da8db240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1c8/0x2704 drivers/net/netdevsim/fib.c:1480 2 locks held by kworker/u4:7/4353: 3 locks held by kworker/1:8/4501: #0: ffff0000d2ce9938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff800022577c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/0:18/4568: #0: ffff0000d2ce9938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff800022a87c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/1:15/5299: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff8000213f7c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff0000f6ebd240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1c8/0x2704 drivers/net/netdevsim/fib.c:1480 3 locks held by syz.5.282/5620: #0: ffff0000d90dc058 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000d90dc058 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x364/0xad4 arch/arm64/mm/fault.c:586 #1: ffff0000f0126558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x13c/0x358 mm/memory.c:2922 #2: ffff0000e915c948 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4cc/0xcf0 fs/btrfs/inode.c:8950 1 lock held by syz-executor/18290: #0: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by syz-executor/18732: #0: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x98c/0xd04 net/core/rtnetlink.c:5647 =============================================