From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 101954] WARNING: suspicious RCU usage in amdgpu_bo_list_get
Date: Thu, 27 Jul 2017 15:23:13 +0000
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--===============0996453795==
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--15011689930.BDFe7Ab.18361
Date: Thu, 27 Jul 2017 15:23:13 +0000
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://bugs.freedesktop.org/
Auto-Submitted: auto-generated

https://bugs.freedesktop.org/show_bug.cgi?id=3D101954

            Bug ID: 101954
           Summary: WARNING: suspicious RCU usage in amdgpu_bo_list_get
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: yaneti@declera.com

Fedora rawhide with debug config as=20
http://pkgs.fedoraproject.org/cgit/rpms/kernel.git/tree/kernel-x86_64-debug=
.config

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Baffin [Radeon RX 460] (rev cf)
1 DP 4k monitor

This is something that seems to've started appearing after the rcu changes =
in
this merge window
....

[   12.958667] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D
[   12.958678] WARNING: suspicious RCU usage
[   12.958691] 4.13.0-0.rc2.git1.1.fc27.x86_64 #1 Not tainted
[   12.958701] -----------------------------
[   12.958714] ./include/linux/rcupdate.h:297 Illegal context switch in RCU
read-side critical section!
[   12.958724]=20
               other info that might help us debug this:

[   12.958737]=20
               rcu_scheduler_active =3D 2, debug_locks =3D 1
[   12.958749] 1 lock held by amdgpu_cs:0/1226:
[   12.958758]  #0:  (rcu_read_lock){......}, at: [<ffffffffc04ff9b5>]
amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.958874]=20
               stack backtrace:
[   12.958890] CPU: 3 PID: 1226 Comm: amdgpu_cs:0 Not tainted
4.13.0-0.rc2.git1.1.fc27.x86_64 #1
[   12.958901] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./990FXA-UD3 R5, BIOS F2 04/01/2015
[   12.958911] Call Trace:
[   12.958931]  dump_stack+0x8e/0xd6
[   12.958953]  lockdep_rcu_suspicious+0xc5/0x100
[   12.959033]  ? amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.959051]  ___might_sleep+0x1ad/0x250
[   12.959073]  __might_sleep+0x4a/0x80
[   12.959095]  __mutex_lock+0x59/0xa00
[   12.959110]  ? trace_hardirqs_on+0xd/0x10
[   12.959141]  ? lock_acquire+0xa3/0x1f0
[   12.959217]  ? amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.959243]  mutex_lock_nested+0x1b/0x20
[   12.959253]  ? mutex_lock_nested+0x1b/0x20
[   12.959321]  amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.959389]  amdgpu_cs_ioctl+0xcb/0x1c50 [amdgpu]
[   12.959413]  ? debug_check_no_obj_freed+0x15f/0x24a
[   12.959562]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.959607]  drm_ioctl_kernel+0x5d/0xb0 [drm]
[   12.959657]  drm_ioctl+0x31b/0x3d0 [drm]
[   12.959726]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.959767]  ? trace_hardirqs_on_caller+0xf4/0x190
[   12.959787]  ? trace_hardirqs_on+0xd/0x10
[   12.959870]  amdgpu_drm_ioctl+0x4f/0x90 [amdgpu]
[   12.959895]  do_vfs_ioctl+0xa6/0x6c0
[   12.959940]  SyS_ioctl+0x79/0x90
[   12.959968]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   12.959981] RIP: 0033:0x7fc88df4a267
[   12.959991] RSP: 002b:00007fc86a0b98b8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   12.960008] RAX: ffffffffffffffda RBX: 00007fc85c000000 RCX:
00007fc88df4a267
[   12.960031] RDX: 00007fc86a0b9a10 RSI: 00000000c0186444 RDI:
000000000000000c
[   12.960040] RBP: 0000000000021000 R08: 00007fc86a0b9900 R09:
00007fc86a0b9950
[   12.960050] R10: 0000000000000002 R11: 0000000000000246 R12:
00007fc860000000
[   12.960061] R13: 0000000002ef5000 R14: 0000000000000000 R15:
0000000000000000
[   12.960287] BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
[   12.960301] in_atomic(): 1, irqs_disabled(): 0, pid: 1226, name: amdgpu_=
cs:0
[   12.960313] 1 lock held by amdgpu_cs:0/1226:
[   12.960323]  #0:  (rcu_read_lock){......}, at: [<ffffffffc04ff9b5>]
amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.960422] CPU: 3 PID: 1226 Comm: amdgpu_cs:0 Not tainted
4.13.0-0.rc2.git1.1.fc27.x86_64 #1
[   12.960431] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./990FXA-UD3 R5, BIOS F2 04/01/2015
[   12.960439] Call Trace:
[   12.960453]  dump_stack+0x8e/0xd6
[   12.960470]  ___might_sleep+0x164/0x250
[   12.960492]  __might_sleep+0x4a/0x80
[   12.960515]  __mutex_lock+0x59/0xa00
[   12.960530]  ? trace_hardirqs_on+0xd/0x10
[   12.960561]  ? lock_acquire+0xa3/0x1f0
[   12.960638]  ? amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.960673]  mutex_lock_nested+0x1b/0x20
[   12.960686]  ? mutex_lock_nested+0x1b/0x20
[   12.960758]  amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.960832]  amdgpu_cs_ioctl+0xcb/0x1c50 [amdgpu]
[   12.960861]  ? debug_check_no_obj_freed+0x15f/0x24a
[   12.961043]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.961083]  drm_ioctl_kernel+0x5d/0xb0 [drm]
[   12.961134]  drm_ioctl+0x31b/0x3d0 [drm]
[   12.961204]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.961241]  ? trace_hardirqs_on_caller+0xf4/0x190
[   12.961262]  ? trace_hardirqs_on+0xd/0x10
[   12.961346]  amdgpu_drm_ioctl+0x4f/0x90 [amdgpu]
[   12.961371]  do_vfs_ioctl+0xa6/0x6c0
[   12.961415]  SyS_ioctl+0x79/0x90
[   12.961443]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   12.961455] RIP: 0033:0x7fc88df4a267
[   12.961466] RSP: 002b:00007fc86a0b98b8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   12.961481] RAX: ffffffffffffffda RBX: 00007fc85c000000 RCX:
00007fc88df4a267
[   12.961488] RDX: 00007fc86a0b9a10 RSI: 00000000c0186444 RDI:
000000000000000c
[   12.961496] RBP: 0000000000021000 R08: 00007fc86a0b9900 R09:
00007fc86a0b9950
[   12.961504] R10: 0000000000000002 R11: 0000000000000246 R12:
00007fc860000000
[   12.961511] R13: 0000000002ef5000 R14: 0000000000000000 R15:
0000000000000000

--=20
You are receiving this mail because:
You are the assignee for the bug.=

--15011689930.BDFe7Ab.18361
Date: Thu, 27 Jul 2017 15:23:13 +0000
MIME-Version: 1.0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://bugs.freedesktop.org/
Auto-Submitted: auto-generated

<html>
    <head>
      <base href=3D"https://bugs.freedesktop.org/">
    </head>
    <body><table border=3D"1" cellspacing=3D"0" cellpadding=3D"8">
        <tr>
          <th>Bug ID</th>
          <td><a class=3D"bz_bug_link=20
          bz_status_NEW "
   title=3D"NEW - WARNING: suspicious RCU usage in amdgpu_bo_list_get"
   href=3D"https://bugs.freedesktop.org/show_bug.cgi?id=3D101954">101954</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>WARNING: suspicious RCU usage in amdgpu_bo_list_get
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/AMDgpu
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel&#64;lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>yaneti&#64;declera.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Fedora rawhide with debug config as=20
<a href=3D"http://pkgs.fedoraproject.org/cgit/rpms/kernel.git/tree/kernel-x=
86_64-debug.config">http://pkgs.fedoraproject.org/cgit/rpms/kernel.git/tree=
/kernel-x86_64-debug.config</a>

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Baffin [Radeon RX 460] (rev cf)
1 DP 4k monitor

This is something that seems to've started appearing after the rcu changes =
in
this merge window
....

[   12.958667] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D
[   12.958678] WARNING: suspicious RCU usage
[   12.958691] 4.13.0-0.rc2.git1.1.fc27.x86_64 #1 Not tainted
[   12.958701] -----------------------------
[   12.958714] ./include/linux/rcupdate.h:297 Illegal context switch in RCU
read-side critical section!
[   12.958724]=20
               other info that might help us debug this:

[   12.958737]=20
               rcu_scheduler_active =3D 2, debug_locks =3D 1
[   12.958749] 1 lock held by amdgpu_cs:0/1226:
[   12.958758]  #0:  (rcu_read_lock){......}, at: [&lt;ffffffffc04ff9b5&gt;]
amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.958874]=20
               stack backtrace:
[   12.958890] CPU: 3 PID: 1226 Comm: amdgpu_cs:0 Not tainted
4.13.0-0.rc2.git1.1.fc27.x86_64 #1
[   12.958901] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./990FXA-UD3 R5, BIOS F2 04/01/2015
[   12.958911] Call Trace:
[   12.958931]  dump_stack+0x8e/0xd6
[   12.958953]  lockdep_rcu_suspicious+0xc5/0x100
[   12.959033]  ? amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.959051]  ___might_sleep+0x1ad/0x250
[   12.959073]  __might_sleep+0x4a/0x80
[   12.959095]  __mutex_lock+0x59/0xa00
[   12.959110]  ? trace_hardirqs_on+0xd/0x10
[   12.959141]  ? lock_acquire+0xa3/0x1f0
[   12.959217]  ? amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.959243]  mutex_lock_nested+0x1b/0x20
[   12.959253]  ? mutex_lock_nested+0x1b/0x20
[   12.959321]  amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.959389]  amdgpu_cs_ioctl+0xcb/0x1c50 [amdgpu]
[   12.959413]  ? debug_check_no_obj_freed+0x15f/0x24a
[   12.959562]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.959607]  drm_ioctl_kernel+0x5d/0xb0 [drm]
[   12.959657]  drm_ioctl+0x31b/0x3d0 [drm]
[   12.959726]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.959767]  ? trace_hardirqs_on_caller+0xf4/0x190
[   12.959787]  ? trace_hardirqs_on+0xd/0x10
[   12.959870]  amdgpu_drm_ioctl+0x4f/0x90 [amdgpu]
[   12.959895]  do_vfs_ioctl+0xa6/0x6c0
[   12.959940]  SyS_ioctl+0x79/0x90
[   12.959968]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   12.959981] RIP: 0033:0x7fc88df4a267
[   12.959991] RSP: 002b:00007fc86a0b98b8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   12.960008] RAX: ffffffffffffffda RBX: 00007fc85c000000 RCX:
00007fc88df4a267
[   12.960031] RDX: 00007fc86a0b9a10 RSI: 00000000c0186444 RDI:
000000000000000c
[   12.960040] RBP: 0000000000021000 R08: 00007fc86a0b9900 R09:
00007fc86a0b9950
[   12.960050] R10: 0000000000000002 R11: 0000000000000246 R12:
00007fc860000000
[   12.960061] R13: 0000000002ef5000 R14: 0000000000000000 R15:
0000000000000000
[   12.960287] BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
[   12.960301] in_atomic(): 1, irqs_disabled(): 0, pid: 1226, name: amdgpu_=
cs:0
[   12.960313] 1 lock held by amdgpu_cs:0/1226:
[   12.960323]  #0:  (rcu_read_lock){......}, at: [&lt;ffffffffc04ff9b5&gt;]
amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.960422] CPU: 3 PID: 1226 Comm: amdgpu_cs:0 Not tainted
4.13.0-0.rc2.git1.1.fc27.x86_64 #1
[   12.960431] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./990FXA-UD3 R5, BIOS F2 04/01/2015
[   12.960439] Call Trace:
[   12.960453]  dump_stack+0x8e/0xd6
[   12.960470]  ___might_sleep+0x164/0x250
[   12.960492]  __might_sleep+0x4a/0x80
[   12.960515]  __mutex_lock+0x59/0xa00
[   12.960530]  ? trace_hardirqs_on+0xd/0x10
[   12.960561]  ? lock_acquire+0xa3/0x1f0
[   12.960638]  ? amdgpu_bo_list_get+0x5/0x130 [amdgpu]
[   12.960673]  mutex_lock_nested+0x1b/0x20
[   12.960686]  ? mutex_lock_nested+0x1b/0x20
[   12.960758]  amdgpu_bo_list_get+0x81/0x130 [amdgpu]
[   12.960832]  amdgpu_cs_ioctl+0xcb/0x1c50 [amdgpu]
[   12.960861]  ? debug_check_no_obj_freed+0x15f/0x24a
[   12.961043]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.961083]  drm_ioctl_kernel+0x5d/0xb0 [drm]
[   12.961134]  drm_ioctl+0x31b/0x3d0 [drm]
[   12.961204]  ? amdgpu_cs_find_mapping+0xa0/0xa0 [amdgpu]
[   12.961241]  ? trace_hardirqs_on_caller+0xf4/0x190
[   12.961262]  ? trace_hardirqs_on+0xd/0x10
[   12.961346]  amdgpu_drm_ioctl+0x4f/0x90 [amdgpu]
[   12.961371]  do_vfs_ioctl+0xa6/0x6c0
[   12.961415]  SyS_ioctl+0x79/0x90
[   12.961443]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   12.961455] RIP: 0033:0x7fc88df4a267
[   12.961466] RSP: 002b:00007fc86a0b98b8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   12.961481] RAX: ffffffffffffffda RBX: 00007fc85c000000 RCX:
00007fc88df4a267
[   12.961488] RDX: 00007fc86a0b9a10 RSI: 00000000c0186444 RDI:
000000000000000c
[   12.961496] RBP: 0000000000021000 R08: 00007fc86a0b9900 R09:
00007fc86a0b9950
[   12.961504] R10: 0000000000000002 R11: 0000000000000246 R12:
00007fc860000000
[   12.961511] R13: 0000000002ef5000 R14: 0000000000000000 R15:
0000000000000000</pre>
        </div>
      </p>


      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>=

--15011689930.BDFe7Ab.18361--

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