INFO: task syz-executor.4:13348 blocked for more than 143 seconds. Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:13348 ppid:5991 flags:0x00000001 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5307 [inline] __schedule+0x103c/0x1e2c kernel/sched/core.c:6625 schedule+0xc4/0x170 kernel/sched/core.c:6701 io_schedule+0x8c/0x120 kernel/sched/core.c:8887 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1301 __folio_lock+0x2c/0x3c mm/filemap.c:1664 lock_page include/linux/pagemap.h:973 [inline] btrfs_page_mkwrite+0x57c/0xc84 fs/btrfs/inode.c:8153 do_page_mkwrite+0x144/0x37c mm/memory.c:2925 wp_page_shared mm/memory.c:3274 [inline] do_wp_page+0x364/0x28d8 mm/memory.c:3356 handle_pte_fault mm/memory.c:4941 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0x1b28/0x3e3c mm/memory.c:5211 __do_page_fault arch/arm64/mm/fault.c:512 [inline] do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831 el0_da+0x64/0x178 arch/arm64/kernel/entry-common.c:515 el0t_64_sync_handler+0xcc/0xf0 arch/arm64/kernel/entry-common.c:658 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: task syz-executor.4:13350 blocked for more than 143 seconds. Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:13350 ppid:5991 flags:0x00000009 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5307 [inline] __schedule+0x103c/0x1e2c kernel/sched/core.c:6625 schedule+0xc4/0x170 kernel/sched/core.c:6701 wait_on_state fs/btrfs/extent-io-tree.c:707 [inline] wait_extent_bit+0x4cc/0x620 fs/btrfs/extent-io-tree.c:751 lock_extent+0x19c/0x248 fs/btrfs/extent-io-tree.c:1742 btrfs_page_mkwrite+0x5fc/0xc84 fs/btrfs/inode.c:8163 do_page_mkwrite+0x144/0x37c mm/memory.c:2925 wp_page_shared mm/memory.c:3274 [inline] do_wp_page+0x364/0x28d8 mm/memory.c:3356 handle_pte_fault mm/memory.c:4941 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0x1b28/0x3e3c mm/memory.c:5211 __do_page_fault arch/arm64/mm/fault.c:512 [inline] do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:586 __arch_copy_to_user+0x88/0x234 arch/arm64/lib/copy_template.S:90 emit_last_fiemap_cache fs/btrfs/extent_io.c:3036 [inline] extent_fiemap+0x16c8/0x1a44 fs/btrfs/extent_io.c:3563 btrfs_fiemap+0x154/0x1c0 fs/btrfs/inode.c:7835 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x194c/0x26f8 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015f3f4d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015f3fcd0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 3 locks held by kworker/1:1/24: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff80001a757c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 #2: ffff0000c1f91240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489 1 lock held by khungtaskd/28: #0: ffff800015f3f300 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 2 locks held by getty/5684: #0: ffff0000d4755098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001aca32f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.2/5974: 1 lock held by syz-executor.3/5975: 2 locks held by kworker/u4:26/7504: 3 locks held by syz-executor.4/13348: #0: ffff0000c6b8a088 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000c6b8a088 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593 #1: ffff0001334e8558 (sb_pagefaults#4){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2925 #2: ffff000134958d78 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4a4/0xc84 fs/btrfs/inode.c:8152 4 locks held by syz-executor.4/13350: #0: ffff000134958ef0 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff000134958ef0 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: btrfs_inode_lock+0x68/0xe0 fs/btrfs/inode.c:169 #1: ffff0000c6b8a088 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff0000c6b8a088 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593 #2: ffff0001334e8558 (sb_pagefaults#4){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2925 #3: ffff000134958d78 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4a4/0xc84 fs/btrfs/inode.c:8152 3 locks held by syz-executor.5/14636: #0: ffff0000c6b8f5c8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000c6b8f5c8 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593 #1: ffff000149322558 (sb_pagefaults#4){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2925 #2: ffff00013495f440 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4a4/0xc84 fs/btrfs/inode.c:8152 4 locks held by syz-executor.5/14696: #0: ffff00013495f5b8 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00013495f5b8 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: btrfs_inode_lock+0x68/0xe0 fs/btrfs/inode.c:169 #1: ffff0000c6b8f5c8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff0000c6b8f5c8 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593 #2: ffff000149322558 (sb_pagefaults#4){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2925 #3: ffff00013495f440 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4a4/0xc84 fs/btrfs/inode.c:8152 1 lock held by syz-executor.0/14967: 1 lock held by syz-executor.4/14948: #0: ffff800015f44640 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:3956 2 locks held by syz-executor.3/14972: =============================================