INFO: task syz-executor:6541 blocked for more than 143 seconds. Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6541 tgid:6541 ppid:6526 task_flags:0x400140 flags:0x00000010 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 wb_wait_for_completion+0x150/0x280 fs/fs-writeback.c:216 __writeback_inodes_sb_nr+0x1b0/0x218 fs/fs-writeback.c:2747 writeback_inodes_sb_nr fs/fs-writeback.c:2764 [inline] writeback_inodes_sb+0x78/0x8c fs/fs-writeback.c:2779 sync_filesystem+0xa0/0x218 fs/sync.c:54 generic_shutdown_super+0x70/0x2b8 fs/super.c:622 kill_block_super+0x44/0x90 fs/super.c:1755 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1417 __cleanup_mnt+0x20/0x30 fs/namespace.c:1424 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 2 locks held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 4 locks held by kworker/1:1/26: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff800097b77bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928b54e8 (rtnl_mutex ){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000dae18768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000dae18768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 1 lock held by khungtaskd/32: #0: ffff80008f859a00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by kworker/R-write/34: 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 2 locks held by kworker/0:1H/111: #0: ffff0000c1f40d48 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009b847bc0 ((work_completion)(&q->timeout_work)){+.+.}-{0:0} , at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 3 locks held by kworker/u8:4/184: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009baf7bc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928b54e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:5/512: 2 locks held by kworker/u8:6/541: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009cc47bc0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 3 locks held by kworker/u8:7/641: 3 locks held by kworker/u8:8/769: 3 locks held by kworker/u8:9/2086: 3 locks held by kworker/u8:10/2106: 3 locks held by kworker/u8:11/2180: 3 locks held by kworker/R-ipv6_/4174: #0: ffff0000d1e17948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a1897ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928b54e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/R-bat_e/4255: 5 locks held by kworker/u8:12/4490: 1 lock held by klogd/6133: 2 locks held by udevd/6144: 1 lock held by dhcpcd/6199: #0: ffff8000928b54e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/6290: #0: ffff0000d2ff50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba2e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 2 locks held by syz-executor/6516: #0: ffff0000c781ce48 (vm_lock){++++}-{0:0}, at: do_page_fault+0x3c4/0x1554 arch/arm64/mm/fault.c:613 #1: ffff0000d7c0a520 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff0000d7c0a520 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1795 [inline] #1: ffff0000d7c0a520 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1960 [inline] #1: ffff0000d7c0a520 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x184/0xdd8 fs/ext4/inode.c:6576 4 locks held by syz-executor/6531: 1 lock held by syz-executor/6541: #0: ffff0000ce3ee0e0 (&type->s_umount_key#82){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000ce3ee0e0 (&type->s_umount_key#82){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000ce3ee0e0 (&type->s_umount_key#82){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 2 locks held by udevd/6649: #0: ffff0000c1547ab0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff0000c1547ab0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:832 #1: ffff0000c1547c50 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #1: ffff0000c1547c50 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_update_page mm/filemap.c:2462 [inline] #1: ffff0000c1547c50 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0x594/0x19c8 mm/filemap.c:2624 2 locks held by syz-executor/7095: #0: ffff0000cbff40e0 (&type->s_umount_key#78){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000cbff40e0 (&type->s_umount_key#78){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000cbff40e0 (&type->s_umount_key#78){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff0000f7ac9628 (&oi->ip_io_mutex){+.+.}-{4:4}, at: ocfs2_inode_cache_io_lock+0x24/0x34 fs/ocfs2/inode.c:1667 1 lock held by syz.1.164/7707: 1 lock held by modprobe/7900: #0: ffff0000d7c0a428 (sb_writers#3){.+.+}-{0:0}, at: pick_link+0x84c/0xba0 fs/namei.c:1923 4 locks held by kworker/u8:13/7903: 1 lock held by kworker/u8:14/7905: =============================================