INFO: task syz.4.82:6674 blocked for more than 143 seconds.
      Tainted: G        W           syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.82        state:D stack:15112 pid:6674  tgid:6673  ppid:5843   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7339
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 inode_lock include/linux/fs.h:869 [inline]
 bch2_direct_write+0x19b/0x2cf0 fs/bcachefs/fs-io-direct.c:613
 bch2_write_iter+0x192/0x2ba0 fs/bcachefs/fs-io-buffered.c:1064
 iter_file_splice_write+0x97a/0x10f0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x104/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5b3/0xcd0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x187/0x270 fs/splice.c:1230
 do_sendfile+0x4ec/0x7f0 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: 0033:0x7f1d8b6aebe9
RSP: 002b:00007f1d8990e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f1d8b8d5fa0 RCX: 00007f1d8b6aebe9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f1d8b731e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d8b8d6038 R14: 00007f1d8b8d5fa0 R15: 00007ffd51221b68
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 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:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8587 Comm: syz.3.331 Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x80 kernel/kcov.c:223
Code: 85 f6 75 39 85 d2 74 35 83 b9 d4 15 00 00 00 74 2c 8b 91 b0 15 00 00 83 fa 02 75 21 48 8b 91 b8 15 00 00 48 8b 32 48 8d 7e 01 <8b> 89 b4 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 e9 7f 73
RSP: 0018:ffffc9000591f410 EFLAGS: 00000246
RAX: ffffffff8af44c88 RBX: ffffc9000591f580 RCX: ffff888030b1bb80
RDX: ffffc90010009000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 1ffff92000b23eb2 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100be4961f R12: 1ffff92000b23eb2
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc9000591f580
FS:  00007f636b2966c0(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33023ffc CR3: 0000000078d82000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 xas_clear_mark+0x28/0x530 lib/xarray.c:914
 xas_init_marks lib/xarray.c:955 [inline]
 xas_store+0x5f2/0x1880 lib/xarray.c:817
 page_cache_delete mm/filemap.c:141 [inline]
 __filemap_remove_folio+0x3c7/0x500 mm/filemap.c:224
 filemap_remove_folio+0xe6/0x200 mm/filemap.c:253
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:176
 shmem_undo_range+0x3a9/0x14b0 mm/shmem.c:1153
 shmem_truncate_range mm/shmem.c:1269 [inline]
 shmem_evict_inode+0x272/0xa70 mm/shmem.c:1397
 evict+0x501/0x9c0 fs/inode.c:810
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 dput+0x19f/0x2b0 fs/dcache.c:911
 __fput+0x69d/0xa80 fs/file_table.c:476
 fput_close_sync+0x119/0x200 fs/file_table.c:573
 __do_sys_close fs/open.c:1587 [inline]
 __se_sys_close fs/open.c:1572 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1572
 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: 0033:0x7f636d02d84a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007f636b295e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f636d02d84a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000010 R08: 0000000000000000 R09: 000000000000b8db
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f636b295ef0 R14: 00007f636b295eb0 R15: 00007f6362e76000
 </TASK>