syzbot

INFO: task syz-executor.2:14145 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:24552 pid:14145 ppid:5108   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x173b/0x4630 kernel/sched/core.c:6625
 schedule+0xc3/0x180 kernel/sched/core.c:6701
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline]
 ntfs_read_folio+0x193/0x210 fs/ntfs3/inode.c:702
 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2424
 filemap_create_folio mm/filemap.c:2552 [inline]
 filemap_get_pages+0xdf7/0x20c0 mm/filemap.c:2605
 filemap_read+0x45a/0x1170 mm/filemap.c:2693
 call_read_iter include/linux/fs.h:1845 [inline]
 generic_file_splice_read+0x240/0x640 fs/splice.c:402
 do_splice_to fs/splice.c:885 [inline]
 splice_direct_to_actor+0x40c/0xbd0 fs/splice.c:956
 do_splice_direct+0x283/0x3d0 fs/splice.c:1065
 do_sendfile+0x620/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
 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: 0033:0x7fa3cae8c169
RSP: 002b:00007fa3c99fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa3cafabf80 RCX: 00007fa3cae8c169
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 00007fa3caee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe97f5726f R14: 00007fa3c99fe300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.2:14148 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:24552 pid:14148 ppid:5108   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x173b/0x4630 kernel/sched/core.c:6625
 schedule+0xc3/0x180 kernel/sched/core.c:6701
 io_schedule+0x8c/0x100 kernel/sched/core.c:8887
 folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301
 __filemap_get_folio+0x44e/0xe50 mm/filemap.c:1936
 pagecache_get_page+0x2c/0x240 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:632 [inline]
 ni_readpage_cmpr+0x313/0xa70 fs/ntfs3/frecord.c:2131
 ntfs_read_folio+0x19e/0x210 fs/ntfs3/inode.c:703
 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2424
 filemap_create_folio mm/filemap.c:2552 [inline]
 filemap_get_pages+0xdf7/0x20c0 mm/filemap.c:2605
 filemap_read+0x45a/0x1170 mm/filemap.c:2693
 call_read_iter include/linux/fs.h:1845 [inline]
 generic_file_splice_read+0x240/0x640 fs/splice.c:402
 do_splice_to fs/splice.c:885 [inline]
 splice_direct_to_actor+0x40c/0xbd0 fs/splice.c:956
 do_splice_direct+0x283/0x3d0 fs/splice.c:1065
 do_sendfile+0x620/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
 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: 0033:0x7fa3cae8c169
RSP: 002b:00007fa3c17dd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa3cafac050 RCX: 00007fa3cae8c169
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 00007fa3caee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe97f5726f R14: 00007fa3c17dd300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cf25530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cf25d30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8cf25360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:5/1063:
 #0: ffff8880b993be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539
 #1: ffff8880b9928788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:976
2 locks held by getty/4745:
 #0: ffff888027bc2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by syz-executor.2/14145:
 #0: ffff8880317d8460 (sb_writers#14){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_create_folio mm/filemap.c:2544 [inline]
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_get_pages+0xb1c/0x20c0 mm/filemap.c:2605
 #2: ffff88803b0d5220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline]
 #2: ffff88803b0d5220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_read_folio+0x193/0x210 fs/ntfs3/inode.c:702
3 locks held by syz-executor.2/14148:
 #0: ffff8880317d8460 (sb_writers#14){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_create_folio mm/filemap.c:2544 [inline]
 #1: ffff88803b0d5660 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_get_pages+0xb1c/0x20c0 mm/filemap.c:2605
 #2: ffff88803b0d5220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline]
 #2: ffff88803b0d5220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_read_folio+0x193/0x210 fs/ntfs3/inode.c:702

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
 <TASK>
 __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+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1063 Comm: kworker/u4:5 Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x7c/0x80 kernel/kcov.c:313
Code: c1 e1 05 48 8d 41 28 4c 39 c8 77 1e 49 ff c2 4c 89 12 48 c7 44 11 08 07 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 <c3> 0f 1f 00 f3 0f 1e fa 41 57 41 56 41 54 53 4c 8b 16 48 8b 46 08
RSP: 0018:ffffc90005717990 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffff888020f09d40
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81f683ce R09: fffffbfff198289d
R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000fffffff8
R13: 0000000000000003 R14: 000000000000ac64 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dd8f63d680 CR3: 000000000cd30000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 find_next_bit include/linux/find.h:64 [inline]
 get_nr_inodes_unused fs/inode.c:89 [inline]
 get_nr_dirty_inodes+0x12e/0x210 fs/inode.c:97
 get_nr_dirty_pages fs/fs-writeback.c:1190 [inline]
 wb_check_old_data_flush fs/fs-writeback.c:2156 [inline]
 wb_do_writeback fs/fs-writeback.c:2220 [inline]
 wb_workfn+0xacc/0xff0 fs/fs-writeback.c:2248
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>