INFO: task kworker/u4:2:38 blocked for more than 143 seconds. Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:2 state:D stack:16448 pid:38 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:3) Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 queue_log_writer+0x215/0x300 fs/reiserfs/journal.c:2980 check_journal_end fs/reiserfs/journal.c:3676 [inline] do_journal_end+0xa38/0x4a30 fs/reiserfs/journal.c:4042 reiserfs_write_inode+0x1f8/0x2a0 fs/reiserfs/inode.c:1779 write_inode fs/fs-writeback.c:1451 [inline] __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1663 writeback_sb_inodes+0x812/0x1050 fs/fs-writeback.c:1889 wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2063 wb_do_writeback fs/fs-writeback.c:2206 [inline] wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2246 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.3:27774 blocked for more than 143 seconds. Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:19672 pid:27774 ppid:5109 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 bit_wait+0xe/0xc0 kernel/sched/wait_bit.c:199 __wait_on_bit+0xb5/0x170 kernel/sched/wait_bit.c:49 __inode_wait_for_writeback fs/fs-writeback.c:1472 [inline] inode_wait_for_writeback+0x211/0x2c0 fs/fs-writeback.c:1484 evict+0x277/0x620 fs/inode.c:661 xattr_unlink fs/reiserfs/xattr.c:96 [inline] lookup_and_delete_xattr fs/reiserfs/xattr.c:494 [inline] reiserfs_xattr_set_handle+0xae5/0xec0 fs/reiserfs/xattr.c:529 reiserfs_xattr_set+0x417/0x530 fs/reiserfs/xattr.c:633 __vfs_removexattr+0x44a/0x480 fs/xattr.c:497 __vfs_removexattr_locked+0x1fe/0x400 fs/xattr.c:532 vfs_removexattr+0x104/0x2b0 fs/xattr.c:554 ovl_do_removexattr fs/overlayfs/overlayfs.h:272 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:280 [inline] ovl_make_workdir+0x5b9/0xdf0 fs/overlayfs/super.c:1361 ovl_get_workdir+0x2e4/0x410 fs/overlayfs/super.c:1444 ovl_fill_super+0x19d7/0x2790 fs/overlayfs/super.c:2000 mount_nodev+0x52/0xe0 fs/super.c:1405 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5e1dc8c0c9 RSP: 002b:00007f5e1ea9b168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5e1ddabf80 RCX: 00007f5e1dc8c0c9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f5e1dce7ae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffebb6ceff R14: 00007f5e1ea9b300 R15: 0000000000022000 INFO: task syz-executor.3:27788 blocked for more than 144 seconds. Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:22440 pid:27788 ppid:5109 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 wb_wait_for_completion+0x155/0x280 fs/fs-writeback.c:192 sync_inodes_sb+0x283/0xaa0 fs/fs-writeback.c:2725 sync_filesystem+0x16b/0x220 fs/sync.c:64 reiserfs_remount+0x1a9/0x19d0 fs/reiserfs/super.c:1445 reconfigure_super+0x3bc/0x7b0 fs/super.c:935 do_remount fs/namespace.c:2807 [inline] path_mount+0xd20/0x10c0 fs/namespace.c:3467 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5e1dc8d5fa RSP: 002b:00007f5e1ea58f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5e1dc8d5fa RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007f5e1ea59020 R08: 00007f5e1ea59020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000202 R12: 00000000200001c0 R13: 0000000020000100 R14: 00007f5e1ea58fe0 R15: 00000000200004c0 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d327010 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d327810 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d326e40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/u4:2/38: #0: ffff888145144938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0 #1: ffffc90000af7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264 2 locks held by getty/4751: #0: ffff88802c26b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 4 locks held by syz-executor.3/27774: #0: ffff88807adbc0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920 fs/super.c:228 #1: ffff88807e05e460 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508 #2: ffff8880360d16c0 (&type->i_mutex_dir_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #2: ffff8880360d16c0 (&type->i_mutex_dir_key#20){++++}-{3:3}, at: vfs_removexattr+0xed/0x2b0 fs/xattr.c:553 #3: ffff8880360b16c0 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #3: ffff8880360b16c0 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:486 [inline] #3: ffff8880360b16c0 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x521/0xec0 fs/reiserfs/xattr.c:529 2 locks held by syz-executor.3/27788: #0: ffff88807e05e0e0 (&type->s_umount_key#102){++++}-{3:3}, at: do_remount fs/namespace.c:2804 [inline] #0: ffff88807e05e0e0 (&type->s_umount_key#102){++++}-{3:3}, at: path_mount+0xcd8/0x10c0 fs/namespace.c:3467 #1: ffff8881469527d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff8881469527d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x264/0xaa0 fs/fs-writeback.c:2723 1 lock held by syz-executor.2/28008: #0: ffff88807e05e0e0 (&type->s_umount_key#102){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 1 lock held by syz-executor.2/28196: #0: ffff88807e05e0e0 (&type->s_umount_key#102){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9856 Comm: kworker/u4:8 Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy16 ieee80211_iface_work RIP: 0010:check_preemption_disabled+0x4f/0x110 lib/smp_processor_id.c:55 Code: 52 75 a9 ff ff ff 7f 74 22 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 c4 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f 9c 8f 04 24 f7 04 24 00 02 00 00 74 d1 49 89 f6 49 89 ff 65 4c RSP: 0018:ffffc9000b277a18 EFLAGS: 00000082 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8aedc8c0 RDI: ffffffff8b4bbf60 RBP: ffffc9000b277b48 R08: dffffc0000000000 R09: fffffbfff1d2d2ce R10: fffffbfff1d2d2ce R11: 1ffffffff1d2d2cd R12: dffffc0000000000 R13: 1ffff9200164ef48 R14: ffffc9000b277a60 R15: 0000000000000046 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056176a8670c0 CR3: 000000001c6b6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline] lock_acquire+0x149/0x3c0 kernel/locking/lockdep.c:5667 local_lock_acquire+0x1d/0x70 include/linux/local_lock_internal.h:29 kcov_remote_stop+0x65/0x450 kernel/kcov.c:994 ieee80211_iface_work+0x26f/0xcf0 net/mac80211/iface.c:1640 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308