[Bug runtime/30405] New: Kernel errors with Fedora 36's 6.2.12 debug kernels

["agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30405

            Bug ID: 30405
           Summary: Kernel errors with Fedora 36's 6.2.12 debug kernels
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: agentzh at gmail dot com
  Target Milestone: ---

We noted that when using Fedora 36 x86_64's latest kernel-debug kernel,
6.2.12-100.fc36.x86_64+debug, when using a minimal kprobes stap script, the
kernel always reports the following error in dmesg:

```
[   89.347060] stap_f93d809e35e31d9f81df52024bfed1b5__230 (a.stp): systemtap:
4.9/0.188, base: ffffffffc06ec000, memory:
52data/28text/25ctx/524390net/389alloc kb, probes: 1
[   89.347073] BUG: sleeping function called from invalid context at
kernel/kallsyms.c:305
[   89.347076] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1831,
name: stapio
[   89.347078] preempt_count: 1, expected: 0
[   89.347080] RCU nest depth: 0, expected: 0
[   89.347081] 3 locks held by stapio/1831:
[   89.347083]  #0: ffff88810d1ceef8 (&f->f_pos_lock){+.+.}-{3:3}, at:
__fdget_pos+0x52/0x60
[   89.347094]  #1: ffff88816f73c498 (sb_writers#3){.+.+}-{0:0}, at:
ksys_write+0x74/0xf0
[   89.347104]  #2: ffffffffc06f9330 (cmd_mutex){+.+.}-{3:3}, at:
_stp_ctl_write_cmd+0xe2/0xe10 [stap_f93d809e35e31d9f81df52024bfed1b5__230]
[   89.347116] Preemption disabled at:
[   89.347117] [<ffffffffc06f0de8>] _stp_ctl_write_cmd+0xd48/0xe10
[stap_f93d809e35e31d9f81df52024bfed1b5__230]
[   89.347124] CPU: 20 PID: 1831 Comm: stapio Tainted: G           OE     
6.2.12-100.fc36.x86_64+debug #1
[   89.347127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.15.0-1.fc35 04/01/2014
[   89.347129] Call Trace:
[   89.347131]  <TASK>
[   89.347133]  dump_stack_lvl+0x71/0x90
[   89.347143]  __might_resched+0x1c2/0x2e0
[   89.347148]  ? __pfx_stapkp_symbol_callback+0x10/0x10
[stap_f93d809e35e31d9f81df52024bfed1b5__230]
[   89.347154]  kallsyms_on_each_symbol+0x6a/0xf0
[   89.347184]  _stp_ctl_write_cmd+0xd62/0xe10
[stap_f93d809e35e31d9f81df52024bfed1b5__230]
[   89.347189]  ? lock_acquire+0xe2/0x2c0
[   89.347196]  proc_reg_write+0x53/0xa0
[   89.347200]  vfs_write+0xea/0x530
[   89.347203]  ? __fdget_pos+0x52/0x60
[   89.347211]  ksys_write+0x74/0xf0
[   89.347215]  do_syscall_64+0x58/0x80
[   89.347221]  ? kvm_sched_clock_read+0x14/0x40
[   89.347224]  ? sched_clock_cpu+0xb/0xc0
[   89.347227]  ? lock_release+0x15d/0x400
[   89.347230]  ? _raw_spin_unlock_irq+0x24/0x50
[   89.347237]  ? _raw_spin_unlock_irq+0x24/0x50
[   89.347240]  ? lockdep_hardirqs_on+0x7d/0x100
[   89.347245]  ? _raw_spin_unlock_irq+0x34/0x50
[   89.347248]  ? syscall_exit_to_user_mode+0xe/0x50
[   89.347252]  ? do_syscall_64+0x67/0x80
[   89.347254]  ? lockdep_hardirqs_on+0x7d/0x100
[   89.347256]  ? do_syscall_64+0x67/0x80
[   89.347259]  ? lockdep_hardirqs_on+0x7d/0x100
[   89.347261]  entry_SYSCALL_64_after_hwframe+0x72/0xdc
[   89.347267] RIP: 0033:0x7f0d4ccdbc6f
[   89.347270] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 09 76 f8 ff 48
8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00
f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 5c 76 f8 ff 48
[   89.347272] RSP: 002b:00007ffe6bb215c0 EFLAGS: 00000293 ORIG_RAX:
0000000000000001
[   89.347275] RAX: ffffffffffffffda RBX: 0000000000000008 RCX:
00007f0d4ccdbc6f
[   89.347277] RDX: 000000000000000c RSI: 00007ffe6bb215f0 RDI:
0000000000000004
[   89.347278] RBP: 000000000000000c R08: 0000000000000000 R09:
00007ffe6bb2077f
[   89.347280] R10: 0000000000000008 R11: 0000000000000293 R12:
00007ffe6bb21a50
[   89.347281] R13: 00007ffe6bb23c80 R14: 0000000000000001 R15:
00007ffe6bb21ad4
[   89.347291]  </TASK>
```

The a.stp file is defined as

```
probe kprobe.function("finish_task_switch") ?,
kprobe.function("finish_task_switch.*") ? {
    println("Hit");
    exit();
}
```

I'm using the latest master branch of the upstream systemtap repo as of this
wring (commit 418f0a45ca447).

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