From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 206299] [nouveau/xen] RTX 20XX instant reboot
Date: Sun, 26 Jan 2020 21:45:26 +0000 [thread overview]
Message-ID: <bug-206299-2300-8iz6c1hJuD@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-206299-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=206299
--- Comment #8 from Frédéric Pierret (frederic.epitre@orange.fr) ---
We found more information!
The previous tests was done with those added lines:
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c
@@ -75,13 +75,25 @@ nv50_disp_chan_mthd(struct nv50_disp_chan *chan, int debug)
if (debug > subdev->debug)
return;
+ nvkm_warn(subdev, "mthd: %p", mthd);
+ nvkm_warn(subdev, "mthd->data: %p", mthd->data);
+ nvkm_warn(subdev, "&mthd->data[0]: %p", &mthd->data[0]);
+ nvkm_warn(subdev, "mthd->data[0].mthd: %p", mthd->data[0].mthd);
for (i = 0; (list = mthd->data[i].mthd) != NULL; i++) {
which gaves as crashlog:
[ 45.513617] nouveau 0000:26:00.0: disp: chid 73 stat 00001080 reason 1
[PUSHBUFFER_ERR] mthd 0200 data badf5040 code badf5040
[ 45.513633] nouveau 0000:26:00.0: disp: mthd: 00000000dfa55708
[ 45.513638] nouveau 0000:26:00.0: disp: mthd->data: 00000000858af80f
[ 45.513641] nouveau 0000:26:00.0: disp: &mthd->data[0]: 00000000858af80f
But replacing "%p" by "%lx", it revealed that mthd is NULL:
[ 74.753207] nouveau 0000:26:00.0: disp: chid 73 stat 00001080 reason 1
[PUSHBUFFER_ERR] mthd 0200 data badf5040 code badf5040
[ 74.753223] nouveau 0000:26:00.0: disp: mthd: 0
[ 74.753226] nouveau 0000:26:00.0: disp: mthd->data: 10
[ 74.753231] nouveau 0000:26:00.0: disp: &mthd->data[0]: 10
[ 74.753241] BUG: kernel NULL pointer dereference, address: 0000000000000020
[ 74.753244] #PF: supervisor read access in kernel mode
That gives some hints!
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next prev parent reply other threads:[~2020-01-26 21:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-24 23:24 [Bug 206299] New: [nouveau/xen] RTX 20XX instant reboot bugzilla-daemon
2020-01-25 0:45 ` [Bug 206299] " bugzilla-daemon
2020-01-25 9:51 ` bugzilla-daemon
2020-01-25 9:51 ` bugzilla-daemon
2020-01-26 15:02 ` bugzilla-daemon
2020-01-26 15:07 ` bugzilla-daemon
2020-01-26 15:55 ` bugzilla-daemon
2020-01-26 20:20 ` bugzilla-daemon
2020-01-26 21:45 ` bugzilla-daemon [this message]
2020-01-26 22:02 ` bugzilla-daemon
2020-01-28 8:36 ` bugzilla-daemon
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