Hello, syzbot found the following issue on: HEAD commit: ca688bff68bc Add linux-next specific files for 20220808 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16ebfe8e080000 kernel config: https://syzkaller.appspot.com/x/.config?x=4c20e006003cdecb dashboard link: https://syzkaller.appspot.com/bug?extid=0e9dc403e57033a74b1d compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0e9dc403e57033a74b1d@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task syz-executor.1:19798 blocked for more than 147 seconds. Not tainted 5.19.0-next-20220808-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26208 pid:19798 ppid:3629 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 io_schedule+0xba/0x130 kernel/sched/core.c:8714 folio_wait_bit_common+0x3dd/0xa90 mm/filemap.c:1298 __folio_lock mm/filemap.c:1664 [inline] folio_lock include/linux/pagemap.h:939 [inline] folio_lock include/linux/pagemap.h:935 [inline] __filemap_get_folio+0xc6d/0xed0 mm/filemap.c:1936 truncate_inode_pages_range+0x37c/0x1510 mm/truncate.c:378 ntfs_evict_inode+0x16/0xa0 fs/ntfs3/inode.c:1741 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 ntfs_fill_super+0x2e89/0x37f0 fs/ntfs3/super.c:1190 get_tree_bdev+0x440/0x760 fs/super.c:1323 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f50d0c8a7aa RSP: 002b:00007f50d1d0bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f50d0c8a7aa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f50d1d0bfe0 RBP: 00007f50d1d0c020 R08: 00007f50d1d0c020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f50d1d0bfe0 R15: 000000002007aa80 </TASK> Showing all threads with locks held in the system: task:rcu_tasks_kthre state:I stack:29000 pid:12 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514 rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8bf889b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 task:rcu_tasks_trace state:I stack:29120 pid:13 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514 rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> 1 lock held by rcu_tasks_trace/13: #0: ffffffff8bf886b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 task:getty state:S stack:23392 pid:3288 ppid:1 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 wait_woken+0x18b/0x1f0 kernel/sched/wait.c:459 n_tty_read+0x1051/0x13e0 drivers/tty/n_tty.c:2243 iterate_tty_read drivers/tty/tty_io.c:858 [inline] tty_read+0x33a/0x5d0 drivers/tty/tty_io.c:933 call_read_iter include/linux/fs.h:2186 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x67d/0x930 fs/read_write.c:470 ksys_read+0x127/0x250 fs/read_write.c:607 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7efd62c0e8fe RSP: 002b:00007fff0e6822e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000055bbf57e9910 RCX: 00007efd62c0e8fe RDX: 0000000000000001 RSI: 00007fff0e682300 RDI: 0000000000000000 RBP: 000055bbf57e9970 R08: 0000000000000007 R09: 000055bbf57eacd0 R10: 0000000000000063 R11: 0000000000000246 R12: 000055bbf57e99ac R13: 00007fff0e682300 R14: 0000000000000000 R15: 000055bbf57e99ac </TASK> 2 locks held by getty/3288: #0: ffff88814a08b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177 task:kworker/0:17 state:D stack:24880 pid:12659 ppid:2 flags:0x00004000 Workqueue: events key_garbage_collector Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 synchronize_rcu_expedited+0x39a/0x670 kernel/rcu/tree_exp.h:955 synchronize_rcu+0x2c3/0x370 kernel/rcu/tree.c:3519 key_garbage_collector+0x3bd/0x910 security/keys/gc.c:292 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> 3 locks held by kworker/0:17/12659: #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000309fda8 (key_gc_work){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #2: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940 task:kworker/u4:2 state:R running task stack:27208 pid:16592 ppid:2 flags:0x00004000 Workqueue: events_unbound flush_to_ldisc Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 pty_write_room drivers/tty/pty.c:133 [inline] pty_write_room+0xb3/0xe0 drivers/tty/pty.c:129 </TASK> no locks held by kworker/u4:2/16592. task:kworker/0:9 state:D stack:25896 pid:19133 ppid:2 flags:0x00004000 Workqueue: rcu_gp wait_rcu_exp_gp Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:571 [inline] synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:622 [inline] rcu_exp_wait_wake+0x28f/0xf80 kernel/rcu/tree_exp.h:688 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> 2 locks held by kworker/0:9/19133: #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90014d07da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 task:syz-executor.1 state:D stack:26208 pid:19798 ppid:3629 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 io_schedule+0xba/0x130 kernel/sched/core.c:8714 folio_wait_bit_common+0x3dd/0xa90 mm/filemap.c:1298 __folio_lock mm/filemap.c:1664 [inline] folio_lock include/linux/pagemap.h:939 [inline] folio_lock include/linux/pagemap.h:935 [inline] __filemap_get_folio+0xc6d/0xed0 mm/filemap.c:1936 truncate_inode_pages_range+0x37c/0x1510 mm/truncate.c:378 ntfs_evict_inode+0x16/0xa0 fs/ntfs3/inode.c:1741 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 ntfs_fill_super+0x2e89/0x37f0 fs/ntfs3/super.c:1190 get_tree_bdev+0x440/0x760 fs/super.c:1323 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f50d0c8a7aa RSP: 002b:00007f50d1d0bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f50d0c8a7aa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f50d1d0bfe0 RBP: 00007f50d1d0c020 R08: 00007f50d1d0c020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f50d1d0bfe0 R15: 000000002007aa80 </TASK> 1 lock held by syz-executor.1/19798: #0: ffff8880520700e0 (&type->s_umount_key#47/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 task:syz-executor.4 state:D stack:29248 pid:21701 ppid:3630 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747 exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] synchronize_rcu_expedited+0x24a/0x670 kernel/rcu/tree_exp.h:940 synchronize_rcu+0x2c3/0x370 kernel/rcu/tree.c:3519 __sched_core_enable kernel/sched/core.c:387 [inline] sched_core_get+0x87/0xa0 kernel/sched/core.c:406 sched_core_alloc_cookie kernel/sched/core_sched.c:18 [inline] sched_core_share_pid+0x3d7/0x9a0 kernel/sched/core_sched.c:185 __do_sys_prctl+0x7de/0x1380 kernel/sys.c:2620 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0781a89279 RSP: 002b:00007f0782c50168 EFLAGS: 00000246 ORIG_RAX: 000000000000009d RAX: ffffffffffffffda RBX: 00007f0781b9bf80 RCX: 00007f0781a89279 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000003e RBP: 00007f0781ae3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf62129ef R14: 00007f0782c50300 R15: 0000000000022000 </TASK> 2 locks held by syz-executor.4/21701: #0: ffffffff8be5e2c8 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x37/0xa0 kernel/sched/core.c:404 #1: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24a/0x670 kernel/rcu/tree_exp.h:940 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-next-20220808-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline] watchdog+0xcf7/0xfd0 kernel/hung_task.c:384 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 18028 Comm: kworker/0:1 Not tainted 5.19.0-next-20220808-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events bpf_prog_free_deferred RIP: 0010:stack_access_ok+0xe3/0x1d0 arch/x86/kernel/unwind_orc.c:347 Code: 03 80 3c 02 00 0f 85 e1 00 00 00 48 8b 73 28 48 89 da 48 89 ef e8 6d af f5 ff 85 c0 74 0f 31 c0 48 83 c4 08 5b 5d 41 5c 41 5d <41> 5e c3 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc9000b827858 EFLAGS: 00000282 RAX: ffffc9000b828001 RBX: 0000000000000001 RCX: 0000000000000001 RDX: ffffc9000b827c01 RSI: ffffc9000b827ce8 RDI: ffffc9000b8278e8 RBP: ffffc9000b827920 R08: ffffffff8e6497f8 R09: ffffc9000b82790c R10: fffff52001704f26 R11: ffffc9000b827d10 R12: ffffc9000b82790d R13: ffffc9000b8278d8 R14: ffffc9000b827ce8 R15: ffffffff8e6497fc FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c004477000 CR3: 000000000bc8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> deref_stack_reg arch/x86/kernel/unwind_orc.c:352 [inline] unwind_next_frame+0x12b4/0x1cc0 arch/x86/kernel/unwind_orc.c:600 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 save_stack+0x151/0x1e0 mm/page_owner.c:127 __reset_page_owner+0x59/0x170 mm/page_owner.c:148 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __vunmap+0x85d/0xd30 mm/vmalloc.c:2696 __vfree+0x3c/0xd0 mm/vmalloc.c:2744 vfree+0x5a/0x90 mm/vmalloc.c:2775 bpf_prog_free_deferred+0x614/0x7f0 kernel/bpf/core.c:2562 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
