INFO: task syz-executor.2:10566 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:25336 pid:10566 ppid: 8426 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xbfd/0x11d0 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 io_wq_exit_workers fs/io-wq.c:1078 [inline] io_wq_put_and_exit+0x76f/0xd20 fs/io-wq.c:1113 io_uring_clean_tctx fs/io_uring.c:9571 [inline] io_uring_cancel_generic+0x9d3/0xbb0 fs/io_uring.c:9651 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x280/0x2570 kernel/exit.c:780 do_group_exit+0x168/0x2d0 kernel/exit.c:922 get_signal+0x16b0/0x2080 kernel/signal.c:2823 arch_do_signal_or_restart+0x8e/0x6d0 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:302 do_syscall_64+0x4c/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007fe4c7267218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88 RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c R13: 00007ffece0794ff R14: 00007fe4c7267300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1645 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1d3/0x29f lib/dump_stack.c:105 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xce4/0xd30 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 55 Comm: kworker/u4:2 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__phys_addr+0x8/0x160 arch/x86/mm/physaddr.c:16 Code: 1f 00 be 0e 00 00 00 48 c7 c7 50 2e 59 8c e8 5f 90 90 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 41 56 53 49 89 fe 33 49 47 00 48 bf ff ff ff 7f ff ff ff ff 4c 89 f6 e8 d1 4d 47 RSP: 0018:ffffc90000fbf6c0 EFLAGS: 00000046 RAX: 1ffff1102802900a RBX: ffff888140148050 RCX: 0000000000fbf701 RDX: dffffc0000000000 RSI: 000000000001c7cc RDI: ffff8880122eb000 RBP: ffffc90000fbf7d0 R08: dffffc0000000000 R09: ffffed1028029085 R10: ffffed1028029085 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8880122eb000 R15: 000000000001c7cc FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000b51ea8 CR3: 000000000c48e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: build_cr3 arch/x86/mm/tlb.c:162 [inline] load_new_mm_cr3 arch/x86/mm/tlb.c:282 [inline] switch_mm_irqs_off+0x857/0x880 arch/x86/mm/tlb.c:627 use_temporary_mm arch/x86/kernel/alternative.c:741 [inline] __text_poke+0x50b/0x8c0 arch/x86/kernel/alternative.c:838 text_poke arch/x86/kernel/alternative.c:900 [inline] text_poke_bp_batch+0x6b0/0x940 arch/x86/kernel/alternative.c:1178 text_poke_flush arch/x86/kernel/alternative.c:1268 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xcc/0x1b0 kernel/jump_label.c:207 static_key_disable+0x16/0x20 kernel/jump_label.c:215 toggle_allocation_gate+0x3a8/0x440 mm/kfence/core.c:637 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 be 0e 00 00 00 add %bh,0xe(%rsi) 6: 48 c7 c7 50 2e 59 8c mov $0xffffffff8c592e50,%rdi d: e8 5f 90 90 00 callq 0x909071 12: c3 retq 13: cc int3 14: cc int3 15: cc int3 16: cc int3 17: cc int3 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: 41 57 push %r15 23: 41 56 push %r14 25: 53 push %rbx 26: 49 89 fe mov %rdi,%r14 * 29: e8 33 49 47 00 callq 0x474961 <-- trapping instruction 2e: 48 bf ff ff ff 7f ff movabs $0xffffffff7fffffff,%rdi 35: ff ff ff 38: 4c 89 f6 mov %r14,%rsi 3b: e8 .byte 0xe8 3c: d1 4d 47 rorl 0x47(%rbp)