INFO: task syz-executor:5215 blocked for more than 143 seconds. Not tainted 6.11.0-next-20240927-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:19952 pid:5215 tgid:5215 ppid:5213 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384 jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505 __ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0x92/0x110 fs/ext4/inode.c:5981 __mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2493 generic_update_time fs/inode.c:2126 [inline] inode_update_time fs/inode.c:2139 [inline] __file_update_time fs/inode.c:2381 [inline] file_update_time+0x3d2/0x450 fs/inode.c:2411 ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6102 do_page_mkwrite+0x198/0x480 mm/memory.c:3163 wp_page_shared mm/memory.c:3564 [inline] do_wp_page+0x23d3/0x52d0 mm/memory.c:3714 handle_pte_fault+0x10e3/0x6800 mm/memory.c:5789 __handle_mm_fault mm/memory.c:5916 [inline] handle_mm_fault+0x11c6/0x1d00 mm/memory.c:6084 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f699bb45bc7 RSP: 002b:00007ffd6fd140a8 EFLAGS: 00010207 RAX: 00007f6998400000 RBX: 000055556d16f370 RCX: 00007f6998400000 RDX: 00007f6998400112 RSI: 000055556d17a4a0 RDI: 00007f6998400020 RBP: 000055556d171b20 R08: 0000000000000000 R09: 000055556d16a730 R10: 9cc2cf680a05b90d R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 00007ffd6fd140c0 R15: 0000000000000000 INFO: task syz.2.562:7020 blocked for more than 144 seconds. Not tainted 6.11.0-next-20240927-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.562 state:D stack:27392 pid:7020 tgid:7018 ppid:5242 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384 jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505 __ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_xattr_set+0x209/0x3d0 fs/ext4/xattr.c:2554 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:629 [inline] __do_sys_fsetxattr fs/xattr.c:710 [inline] __se_sys_fsetxattr+0x383/0x480 fs/xattr.c:686 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2b8df7dff9 RSP: 002b:00007f2b8edbc038 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007f2b8e136058 RCX: 00007f2b8df7dff9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000006 RBP: 00007f2b8dff0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f2b8e136058 R15: 00007ffc688cc518 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 4 locks held by kworker/1:2/938: 2 locks held by syslogd/4665: 2 locks held by klogd/4672: 2 locks held by getty/4983: #0: ffff888031b590a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/5215: #0: ffff88807795e730 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff88807795e730 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6250 #1: ffff88814d9c0518 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs.h:1721 [inline] #1: ffff88814d9c0518 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1886 [inline] #1: ffff88814d9c0518 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6101 2 locks held by syz.2.562/7019: #0: ffff88814d9c4160 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x2b4/0x380 fs/jbd2/transaction.c:889 #1: ffff88814d9c43e8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x262/0xc10 fs/jbd2/journal.c:2465 2 locks held by syz.2.562/7020: #0: ffff88814d9c0420 (sb_writers#4){++++}-{0:0}, at: mnt_want_write_file+0x5e/0x200 fs/namespace.c:559 #1: ffff8880774ebf68 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff8880774ebf68 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-next-20240927-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 938 Comm: kworker/1:2 Not tainted 6.11.0-next-20240927-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline] RIP: 0010:lock_release+0x191/0xa30 kernel/locking/lockdep.c:5842 Code: 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 d1 31 8e 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 00 00 00 00 00 9c <8f> 84 24 b0 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 b9 30 8e 00 RSP: 0018:ffffc90000a18898 EFLAGS: 00000046 RAX: ffffffff93e3b6d0 RBX: 1ffff9200014312a RCX: ffffffff817065a0 RDX: 0000000000000000 RSI: ffffffff8c610240 RDI: ffffffff8c610200 RBP: ffffc90000a189d0 R08: ffffffff901d062f R09: 1ffffffff203a0c5 R10: dffffc0000000000 R11: fffffbfff203a0c6 R12: 1ffff92000143120 R13: ffffffff84c2aeb1 R14: ffffc90000a18950 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb511dbbf98 CR3: 00000000217e4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline] _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:998 [inline] debug_check_no_obj_freed+0x561/0x580 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2274 [inline] slab_free mm/slub.c:4580 [inline] kmem_cache_free+0x11f/0x420 mm/slub.c:4682 dst_destroy+0x2ac/0x460 net/core/dst.c:124 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 neigh_periodic_work+0xb35/0xd50 net/core/neighbour.c:1019 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244