INFO: task syz-executor.3:13365 blocked for more than 143 seconds. Not tainted 6.4.0-rc1-syzkaller-00012-g16a8829130ca #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:25704 pid:13365 ppid:5025 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 io_schedule+0x8c/0x100 kernel/sched/core.c:8979 bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbd/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:70 [inline] lock_buffer include/linux/buffer_head.h:406 [inline] __sync_dirty_buffer+0x120/0x380 fs/buffer.c:2807 __ext4_handle_dirty_metadata+0x2a6/0x820 fs/ext4/ext4_jbd2.c:387 ext4_handle_dirty_dirblock+0x362/0x6f0 fs/ext4/namei.c:438 ext4_finish_convert_inline_dir+0x57b/0x6f0 fs/ext4/inline.c:1178 ext4_convert_inline_data_nolock+0xa01/0xd80 fs/ext4/inline.c:1255 ext4_try_add_inline_entry+0x809/0xb70 fs/ext4/inline.c:1328 ext4_add_entry+0x535/0x1010 fs/ext4/namei.c:2384 ext4_mkdir+0x553/0xce0 fs/ext4/namei.c:3006 vfs_mkdir+0x29d/0x450 fs/namei.c:4115 do_mkdirat+0x264/0x520 fs/namei.c:4138 __do_sys_mkdirat fs/namei.c:4153 [inline] __se_sys_mkdirat fs/namei.c:4151 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4151 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1a1a68c169 RSP: 002b:00007f1a10edd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f1a1a7ac050 RCX: 00007f1a1a68c169 RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000009 RBP: 00007f1a1a6e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe11d996ef R14: 00007f1a10edd300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cf27670 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cf27a30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/28: #0: ffffffff8cf274a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by udevd/4446: #0: ffff8880254b7398 (&type->i_mutex_dir_key#5){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline] #0: ffff8880254b7398 (&type->i_mutex_dir_key#5){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706 2 locks held by getty/4749: #0: ffff88802d3a2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176 2 locks held by kworker/1:3/4771: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000379fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 3 locks held by kworker/0:6/5138: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000532fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 #2: ffffffff8cf2cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #2: ffffffff8cf2cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 3 locks held by kworker/1:11/5394: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc90006da7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 #2: ffffffff8cf2cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #2: ffffffff8cf2cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992 3 locks held by syz-executor.3/13365: #0: ffff888079ba8460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394 #1: ffff888074285400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #1: ffff888074285400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3884 #2: ffff8880742850c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8880742850c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xf6/0xb70 fs/ext4/inline.c:1286 3 locks held by syz-executor.0/14325: #0: ffff888089a28460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394 #1: ffff888074299800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #1: ffff888074299800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3884 #2: ffff8880742994c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8880742994c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xf6/0xb70 fs/ext4/inline.c:1286 2 locks held by kworker/0:0/14565: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc90016e4fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 1 lock held by syz-executor.4/14615: 2 locks held by syz-executor.2/14635: 1 lock held by syz-executor.2/14655: #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:142 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1391 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1534 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x6a8/0x910 arch/x86/mm/fault.c:1590 1 lock held by syz-executor.2/14656: #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:142 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1391 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1534 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x6a8/0x910 arch/x86/mm/fault.c:1590 1 lock held by syz-executor.2/14657: #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:142 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1391 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1534 [inline] #0: ffff88801246f668 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x6a8/0x910 arch/x86/mm/fault.c:1590 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc1-syzkaller-00012-g16a8829130ca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:379 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: 14408 Comm: udevd Not tainted 6.4.0-rc1-syzkaller-00012-g16a8829130ca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:do_mpage_readpage+0x1b3/0x1fa0 fs/mpage.c:179 Code: 10 49 d3 e6 ba 40 00 00 00 48 8d bc 24 20 01 00 00 31 f6 e8 ef 05 df ff 48 b8 00 00 00 00 00 fc ff df 48 8b 8c 24 b8 00 00 00 <80> 3c 01 00 74 08 4c 89 ff e8 cf 03 df ff bb f0 00 00 00 4c 89 bc RSP: 0018:ffffc90016467180 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000009 RCX: 1ffffd400016bf4b RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900164672e0 RBP: ffffc90016467350 R08: dffffc0000000000 R09: 0000000000000000 R10: ffffc900164672a0 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc900164673e0 R14: 0000000000000200 R15: ffffea0000b5fa58 FS: 00007f270dcb6c80(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe9a1fa8000 CR3: 0000000078ca5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mpage_readahead+0x454/0x930 fs/mpage.c:382 read_pages+0x183/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:242 do_page_cache_ra mm/readahead.c:300 [inline] force_page_cache_ra mm/readahead.c:331 [inline] page_cache_sync_ra+0x3c9/0x480 mm/readahead.c:705 page_cache_sync_readahead include/linux/pagemap.h:1211 [inline] filemap_get_pages+0x49c/0x20c0 mm/filemap.c:2595 filemap_read+0x45a/0x1170 mm/filemap.c:2690 blkdev_read_iter+0x3e5/0x530 block/fops.c:606 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x788/0xb00 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f270d916b6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffec4717128 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f270d916b6a RDX: 0000000000040000 RSI: 000055b859b4b388 RDI: 0000000000000009 RBP: 0000000000040000 R08: 000055b859b4b360 R09: 00007f270dd63840 R10: 0000000000004011 R11: 0000000000000246 R12: 000055b859b4b360 R13: 000055b859b4b378 R14: 000055b859ab6148 R15: 000055b859ab60f0