syzbot

INFO: task syz.4.2271:15000 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2271      state:D stack:22896 pid:15000 tgid:14994 ppid:5836   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
 udf_table_free_blocks fs/udf/balloc.c:375 [inline]
 udf_free_blocks+0x9ff/0x2270 fs/udf/balloc.c:677
 udf_delete_aext+0x70a/0xed0 fs/udf/inode.c:2372
 udf_table_new_block fs/udf/balloc.c:645 [inline]
 udf_new_block+0x18ba/0x21c0 fs/udf/balloc.c:725
 inode_getblk fs/udf/inode.c:894 [inline]
 udf_map_block+0x1c9a/0x5340 fs/udf/inode.c:447
 __udf_get_block+0x126/0x410 fs/udf/inode.c:461
 __block_write_begin_int+0x694/0x19a0 fs/buffer.c:2116
 block_write_begin+0x8f/0x120 fs/buffer.c:2226
 udf_write_begin+0xfc/0x250 fs/udf/inode.c:256
 generic_perform_write+0x348/0x990 mm/filemap.c:4055
 udf_file_write_iter+0x2fc/0x660 fs/udf/file.c:111
 iter_file_splice_write+0xbfc/0x1510 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x11d/0x220 fs/splice.c:1164
 splice_direct_to_actor+0x588/0xc80 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x289/0x3e0 fs/splice.c:1233
 do_sendfile+0x564/0x8a0 fs/read_write.c:1363
 __do_sys_sendfile64 fs/read_write.c:1424 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1410
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9c3185d29
RSP: 002b:00007fd9c3faf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fd9c3376080 RCX: 00007fd9c3185d29
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007fd9c3201aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd9c3376080 R15: 00007ffe76c11a98
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xff6/0x1040 kernel/hung_task.c:397
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 62 Comm: kworker/u8:5 Not tainted 6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:load_new_mm_cr3+0x15b/0x200 arch/x86/mm/tlb.c:298
Code: 3d ff 07 00 00 73 51 41 f7 c4 00 08 00 00 75 55 41 ff c4 41 0f b7 c4 48 09 c1 48 b8 00 00 00 00 00 00 00 80 48 09 c8 0f 22 d8 <5b> 41 5c 41 5d 41 5e 41 5f e9 62 ea a2 0a 90 0f 0b 90 eb aa 90 0f
RSP: 0018:ffffc9000214f630 EFLAGS: 00000046
RAX: 000000000e736000 RBX: ffffffff8ea39b78 RCX: ffff88801cb63c00
RDX: 0000000000000000 RSI: 000000000e736000 RDI: 000000001fffffff
RBP: ffffc9000214f730 R08: ffffffff814d4095 R09: 1ffffffff1d47424
R10: dffffc0000000000 R11: fffffbfff1d47425 R12: 0000000000000000
R13: ffffffff8ea39ac0 R14: ffffffff8e736000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c5bc329680 CR3: 000000000e736000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 switch_mm_irqs_off+0x769/0xa70 arch/x86/mm/tlb.c:636
 unuse_temporary_mm arch/x86/kernel/alternative.c:1860 [inline]
 __text_poke+0x8f0/0xd30 arch/x86/kernel/alternative.c:1970
 text_poke arch/x86/kernel/alternative.c:2013 [inline]
 text_poke_bp_batch+0x59c/0xb30 arch/x86/kernel/alternative.c:2346
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xd2/0x1c0 kernel/jump_label.c:240
 static_key_disable+0x1a/0x20 kernel/jump_label.c:248
 toggle_allocation_gate+0x1bf/0x260 mm/kfence/core.c:854
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>