INFO: task syz-executor.1:10645 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:28408 pid:10645 ppid:3639   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5194 [inline]
 __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506
 schedule+0xda/0x1b0 kernel/sched/core.c:6582
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:891 [inline]
 p9_fd_close+0x328/0x580 net/9p/trans_fd.c:921
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1040
 p9_client_create+0x728/0xf20 net/9p/client.c:1027
 v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408
 v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1530
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x1326/0x1e20 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa7bfe8b5a9
RSP: 002b:00007fa7c1050168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa7bffac050 RCX: 00007fa7bfe8b5a9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007fa7bfee6580 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc4343c4ef R14: 00007fa7c1050300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc6b/0xfc0 kernel/hung_task.c:369
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10308 Comm: kworker/u4:8 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:207
Code: 34 00 5d be 03 00 00 00 e9 86 2f 9e 07 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 39 db 85 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9
RSP: 0018:ffffc9000376f998 EFLAGS: 00000293
RAX: 0000000080000000 RBX: 00000001400f9007 RCX: ffffffff81b5df15
RDX: ffff888020dd1d40 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000558 R08: 0000000000000007 R09: 0000000000000000
R10: 00000001400f9067 R11: 0000000000000001 R12: 00000001400f9067
R13: ffffc9000376fa40 R14: ffff88813fe38aa8 R15: ffff888140158000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c013a2d000 CR3: 000000000bc8e000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline]
 protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline]
 pmd_pfn arch/x86/include/asm/pgtable.h:196 [inline]
 pte_lockptr include/linux/mm.h:2324 [inline]
 __get_locked_pte+0x8a/0x270 mm/memory.c:1847
 get_locked_pte include/linux/mm.h:2165 [inline]
 __text_poke+0x1b3/0x8e0 arch/x86/kernel/alternative.c:1132
 text_poke arch/x86/kernel/alternative.c:1217 [inline]
 text_poke_bp_batch+0x44a/0x6c0 arch/x86/kernel/alternative.c:1563
 text_poke_flush arch/x86/kernel/alternative.c:1669 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:1666 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1676
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x32f/0x410 kernel/jump_label.c:801
 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate mm/kfence/core.c:800 [inline]
 toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:792
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>