INFO: task syz.0.1182:10081 blocked for more than 143 seconds.
      Not tainted 6.17.0-rc1-next-20250814-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1182      state:D stack:25448 pid:10081 tgid:10081 ppid:5857   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 request_wait_answer fs/fuse/dev.c:566 [inline]
 __fuse_request_send fs/fuse/dev.c:580 [inline]
 __fuse_simple_request+0xf15/0x18d0 fs/fuse/dev.c:674
 fuse_simple_request fs/fuse/fuse_i.h:1230 [inline]
 fuse_flush+0x5d4/0x800 fs/fuse/file.c:476
 filp_flush+0xba/0x190 fs/open.c:1547
 filp_close+0x1d/0x40 fs/open.c:1560
 __range_close fs/file.c:767 [inline]
 __do_sys_close_range fs/file.c:826 [inline]
 __se_sys_close_range+0x359/0x650 fs/file.c:790
 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: 0033:0x7f50b8f8ebe9
RSP: 002b:00007ffde829b5a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 000000000002f081 RCX: 00007f50b8f8ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f50b91b7da0 R08: 0000000000000001 R09: 00000012e829b89f
R10: 0000001b31d20000 R11: 0000000000000246 R12: 00007f50b91b5fac
R13: 00007f50b91b5fa0 R14: ffffffffffffffff R15: 00007ffde829b6c0
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full) 
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:332 [inline]
 watchdog+0xf60/0xfa0 kernel/hung_task.c:495
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 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:
IPVS: sed: UDP 224.0.0.2:0 - no destination available
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14851 Comm: syz.8.2397 Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
RIP: 0010:__phys_addr+0x81/0x180 arch/x86/mm/physaddr.c:28
Code: 25 9e ae 00 48 2b 1d 86 ae 76 0c 48 89 df 4c 89 f6 e8 83 22 4b 00 4c 39 f3 0f 87 ef 00 00 00 48 c7 c0 41 c5 e4 8f 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 98 00 00 00 44 0f b6 35 2b ef 6f 0e bf
RSP: 0018:ffffc900038c68b0 EFLAGS: 00000a02
RAX: 1ffffffff1fc98a8 RBX: 000000004317f580 RCX: ffff8880279d1e00
RDX: 0000000000000000 RSI: ffff8880c317f580 RDI: 000000004317f580
RBP: ffffc900038c6a28 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fc9b67 R12: dffffc0000000000
R13: 1ffff92000718d30 R14: ffff8880c317f580 R15: dffffc0000000000
FS:  00007f5ba1edb6c0(0000) GS:ffff8881258d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001140 CR3: 0000000056ce6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 virt_to_folio include/linux/mm.h:1197 [inline]
 virt_to_slab mm/slab.h:187 [inline]
 kasan_addr_to_slab+0x22/0x90 mm/kasan/common.c:47
 kasan_record_aux_stack+0xf/0xd0 mm/kasan/generic.c:544
 __call_rcu_common kernel/rcu/tree.c:3123 [inline]
 call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4680 [inline]
 kmem_cache_free+0x309/0x400 mm/slub.c:4782
 blk_update_request+0x57e/0xe60 block/blk-mq.c:989
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1151
 <kernel::block::mq::request::Request<rnull::NullBlkDevice>>::end_ok rust/kernel/block/mq/request.rs:129 [inline]
 <rnull::NullBlkDevice as kernel::block::mq::operations::Operations>::queue_rq drivers/block/rnull.rs:69 [inline]
 <kernel::block::mq::operations::OperationsVTable<rnull::NullBlkDevice>>::queue_rq_callback+0x1b6/0x2a0 rust/kernel/block/mq/operations.rs:94
 blk_mq_dispatch_rq_list+0x4bd/0x1900 block/blk-mq.c:2120
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
 blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
 __blk_mq_sched_dispatch_requests+0xda4/0x1570 block/blk-mq-sched.c:307
 blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
 blk_mq_run_hw_queue+0x404/0x4f0 block/blk-mq.c:2358
 blk_mq_dispatch_list+0xd0c/0xe00 include/linux/spinlock.h:-1
 blk_mq_flush_plug_list+0x469/0x550 block/blk-mq.c:2967
 __blk_flush_plug+0x3d3/0x4b0 block/blk-core.c:1220
 blk_finish_plug+0x5e/0x90 block/blk-core.c:1247
 blkdev_writepages+0x10e/0x170 block/fops.c:484
 do_writepages+0x32b/0x550 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 file_write_and_wait_range+0x23e/0x340 mm/filemap.c:794
 blkdev_fsync+0x74/0xd0 block/fops.c:615
 generic_write_sync+0x1b3/0x290 include/linux/fs.h:3036
 blkdev_write_iter+0x5fa/0x710 block/fops.c:800
 iter_file_splice_write+0x9c6/0x10b0 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1158
 splice_direct_to_actor+0x5a5/0xcc0 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: 0033:0x7f5ba0f8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ba1edb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5ba11b5fa0 RCX: 00007f5ba0f8ebe9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f5ba1011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ba11b6038 R14: 00007f5ba11b5fa0 R15: 00007fff809ecd28
 </TASK>