INFO: task syz.0.94:6717 blocked for more than 143 seconds. Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.94 state:D stack:16312 pid:6717 tgid:6716 ppid:5822 task_flags:0x400140 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 io_schedule+0x81/0xe0 kernel/sched/core.c:7723 folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317 folio_lock include/linux/pagemap.h:1114 [inline] invalidate_inode_pages2_range+0x557/0xa80 mm/truncate.c:690 bch2_write_invalidate_inode_pages_range+0xc5/0x110 fs/bcachefs/fs-io-pagecache.c:68 bch2_direct_write+0x2a62/0x2ce0 fs/bcachefs/fs-io-direct.c:662 bch2_write_iter+0x18f/0x2b90 fs/bcachefs/fs-io-buffered.c:1064 iter_file_splice_write+0x937/0x1000 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0xfe/0x160 fs/splice.c:1158 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1227 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb291f8e929 RSP: 002b:00007fb292dac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb2921b5fa0 RCX: 00007fb291f8e929 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 RBP: 00007fb292010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb2921b5fa0 R15: 00007fffdd298798 INFO: task syz.0.94:6756 blocked for more than 144 seconds. Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.94 state:D stack:23976 pid:6756 tgid:6716 ppid:5822 task_flags:0x440040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 __bch2_two_state_lock+0x1ea/0x370 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline] bch2_readahead+0x94f/0x1100 fs/bcachefs/fs-io-buffered.c:296 read_pages+0x177/0x580 mm/readahead.c:160 page_cache_ra_unbounded+0x346/0x7b0 mm/readahead.c:264 filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2602 filemap_splice_read+0x4fc/0xbc0 mm/filemap.c:2990 do_splice_read fs/splice.c:979 [inline] splice_direct_to_actor+0x4a9/0xcc0 fs/splice.c:1083 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1227 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb291f8e929 RSP: 002b:00007fb292d8b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb2921b6080 RCX: 00007fb291f8e929 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006 RBP: 00007fb292010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 000000007a680000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb2921b6080 R15: 00007fffdd298798 INFO: task syz.0.94:6759 blocked for more than 145 seconds. Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.94 state:D stack:24040 pid:6759 tgid:6716 ppid:5822 task_flags:0x400140 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 __bch2_two_state_lock+0x1ea/0x370 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline] bch2_read_iter+0x20a/0x1440 fs/bcachefs/fs-io-direct.c:221 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4cd/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb291f8e929 RSP: 002b:00007fb292d6a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fb2921b6160 RCX: 00007fb291f8e929 RDX: 0000000000002020 RSI: 0000200000006b40 RDI: 0000000000000004 RBP: 00007fb292010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb2921b6160 R15: 00007fffdd298798 INFO: task syz.0.94:6765 blocked for more than 145 seconds. Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.94 state:D stack:28904 pid:6765 tgid:6716 ppid:5822 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 fdget_pos+0x247/0x320 fs/file.c:1217 class_fd_pos_constructor include/linux/file.h:85 [inline] ksys_write+0x79/0x250 fs/read_write.c:729 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb291f8e929 RSP: 002b:00007fb292d49038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb2921b6240 RCX: 00007fb291f8e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fb292010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fb2921b6240 R15: 00007fffdd298798 INFO: task syz.0.94:6766 blocked for more than 145 seconds. Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.94 state:D stack:28904 pid:6766 tgid:6716 ppid:5822 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 inode_dio_wait+0x149/0x240 fs/inode.c:2622 bch2_fallocate_dispatch+0x116/0x410 fs/bcachefs/fs-io.c:828 vfs_fallocate+0x6a0/0x830 fs/open.c:341 ksys_fallocate fs/open.c:365 [inline] __do_sys_fallocate fs/open.c:370 [inline] __se_sys_fallocate fs/open.c:368 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:368 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb291f8e929 RSP: 002b:00007fb292d28038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fb2921b6320 RCX: 00007fb291f8e929 RDX: 0000000000000007 RSI: 0000000000000010 RDI: 0000000000000004 RBP: 00007fb292010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010001 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fb2921b6320 R15: 00007fffdd298798 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 6 locks held by kworker/u8:6/3543: 2 locks held by getty/5583: #0: ffff8880358420a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 1 lock held by syz.0.94/6717: #0: ffff88805629c428 (sb_writers#26){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1157 1 lock held by syz.0.94/6756: #0: ffff88807156a148 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff88807156a148 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228 1 lock held by syz.0.94/6759: #0: ffff88803132b278 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1217 1 lock held by syz.0.94/6765: #0: ffff88803132b278 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1217 2 locks held by syz.0.94/6766: #0: ffff88805629c428 (sb_writers#26){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3096 [inline] #0: ffff88805629c428 (sb_writers#26){.+.+}-{0:0}, at: vfs_fallocate+0x62a/0x830 fs/open.c:340 #1: ffff888071569fa8 (&sb->s_type->i_mutex_key#31){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff888071569fa8 (&sb->s_type->i_mutex_key#31){++++}-{4:4}, at: bch2_fallocate_dispatch+0x10e/0x410 fs/bcachefs/fs-io.c:827 2 locks held by syz-executor/7196: #0: ffff88805476c0e0 (&type->s_umount_key#66){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff88805476c0e0 (&type->s_umount_key#66){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff88805476c0e0 (&type->s_umount_key#66){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506 #1: ffffffff8e144780 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3782 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:470 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 44 Comm: kworker/u8:3 Not tainted 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:match_held_lock+0x3/0xc0 kernel/locking/lockdep.c:5308 Code: 5f e9 81 ca 02 00 cc e8 fb f8 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 56 53 01 00 00 00 48 39 77 10 74 6a 81 7f 20 00 00 20 00 72 5f 48 8b RSP: 0018:ffffc90000b47a20 EFLAGS: 00000097 RAX: 0000000000000001 RBX: ffff888140aae4f0 RCX: 17728653e6427700 RDX: ffff888140aada00 RSI: ffff88801a4a0018 RDI: ffff888140aae4f0 RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000168f2c R12: 0000000000000046 R13: ffff888140aada00 R14: ffff88801a4a0018 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125d83000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555587574608 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_is_held kernel/locking/lockdep.c:5604 [inline] lock_is_held_type+0xa8/0x190 kernel/locking/lockdep.c:5943 lock_is_held include/linux/lockdep.h:249 [inline] worker_clr_flags kernel/workqueue.c:999 [inline] process_one_work kernel/workqueue.c:3282 [inline] process_scheduled_works+0xe09/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245