INFO: task syz-executor:6478 blocked for more than 156 seconds. Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6478 tgid:6478 ppid:6467 task_flags:0x400140 flags:0x0000000c Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16a4/0x2c80 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6860 io_schedule+0x8c/0x124 kernel/sched/core.c:7742 folio_wait_bit_common+0x65c/0xbac mm/filemap.c:1317 folio_wait_bit+0x30/0x40 mm/filemap.c:1456 folio_wait_writeback+0x9c/0x100 mm/page-writeback.c:3149 __filemap_fdatawait_range+0x160/0x274 mm/filemap.c:539 filemap_write_and_wait_range+0x244/0x314 mm/filemap.c:700 filemap_write_and_wait include/linux/pagemap.h:68 [inline] sync_blockdev+0x50/0x6c block/bdev.c:222 sync_filesystem+0x1d8/0x218 fs/sync.c:70 generic_shutdown_super+0x70/0x2bc fs/super.c:621 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 4 locks held by kworker/0:0/9: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800098207b80 (reg_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5358768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d5358768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xcc/0x1d0 net/wireless/reg.c:3209 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by khungtaskd/32: #0: ffff800090118020 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 2 locks held by pr/ttyAMA0/46: 3 locks held by kworker/u8:4/62: 3 locks held by kworker/u8:5/468: 3 locks held by kworker/u8:6/1626: 3 locks held by kworker/R-ipv6_/4125: #0: ffff0000d34bd148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000a3f87b20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4206: 2 locks held by syslogd/6071: 2 locks held by udevd/6086: 2 locks held by getty/6229: #0: ffff0000d353d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009c1db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x46c/0x123c drivers/tty/n_tty.c:2222 3 locks held by syz-executor/6458: #0: ffff0000d6c49e48 (vm_lock){++++}-{0:0}, at: do_page_fault+0x3b0/0x11c8 arch/arm64/mm/fault.c:619 #1: ffff0000d943c518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1783 [inline] #1: ffff0000d943c518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1948 [inline] #1: ffff0000d943c518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x19c/0xe30 fs/ext4/inode.c:6220 #2: ffff0000d9442950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xeb8/0x1170 fs/jbd2/transaction.c:442 2 locks held by syz-executor/6468: 1 lock held by syz-executor/6475: #0: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz-executor/6477: 1 lock held by syz-executor/6478: #0: ffff0000f60520e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000f60520e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000f60520e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 3 locks held by kworker/u8:7/7034: 2 locks held by sed/7141: 3 locks held by kworker/u8:8/7142: 3 locks held by kworker/u8:9/7143: 2 locks held by kworker/u8:10/7144: 2 locks held by syz-executor/7145: =============================================