Revision 28f300d23674fa01ae747c66ce861d4ee6aebe8c authored by Pavel Emelyanov on 19 September 2007, 05:46:45 UTC, committed by Linus Torvalds on 19 September 2007, 18:24:18 UTC
It turned out, that the user namespace is released during the do_exit() in exit_task_namespaces(), but the struct user_struct is released only during the put_task_struct(), i.e. MUCH later. On debug kernels with poisoned slabs this will cause the oops in uid_hash_remove() because the head of the chain, which resides inside the struct user_namespace, will be already freed and poisoned. Since the uid hash itself is required only when someone can search it, i.e. when the namespace is alive, we can safely unhash all the user_struct-s from it during the namespace exiting. The subsequent free_uid() will complete the user_struct destruction. For example simple program #include <sched.h> char stack[2 * 1024 * 1024]; int f(void *foo) { return 0; } int main(void) { clone(f, stack + 1 * 1024 * 1024, 0x10000000, 0); return 0; } run on kernel with CONFIG_USER_NS turned on will oops the kernel immediately. This was spotted during OpenVZ kernel testing. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Acked-by: "Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 735de22
usbmixer_maps.c
/*
* Additional mixer mapping
*
* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
struct usbmix_name_map {
int id;
const char *name;
int control;
};
struct usbmix_selector_map {
int id;
int count;
const char **names;
};
struct usbmix_ctl_map {
u32 id;
const struct usbmix_name_map *map;
const struct usbmix_selector_map *selector_map;
int ignore_ctl_error;
};
/*
* USB control mappers for SB Exitigy
*/
/*
* Topology of SB Extigy (see on the wide screen :)
USB_IN[1] --->FU[2]------------------------------+->MU[16]-->PU[17]-+->FU[18]--+->EU[27]--+->EU[21]-->FU[22]--+->FU[23] > Dig_OUT[24]
^ | | | |
USB_IN[3] -+->SU[5]-->FU[6]--+->MU[14] ->PU[15]->+ | | | +->FU[25] > Dig_OUT[26]
^ ^ | | | |
Dig_IN[4] -+ | | | | +->FU[28]---------------------> Spk_OUT[19]
| | | |
Lin-IN[7] -+-->FU[8]---------+ | | +----------------------------------------> Hph_OUT[20]
| | |
Mic-IN[9] --+->FU[10]----------------------------+ |
|| |
|| +----------------------------------------------------+
VV V
++--+->SU[11]-->FU[12] --------------------------------------------------------------------------------------> USB_OUT[13]
*/
static struct usbmix_name_map extigy_map[] = {
/* 1: IT pcm */
{ 2, "PCM Playback" }, /* FU */
/* 3: IT pcm */
/* 4: IT digital in */
{ 5, NULL }, /* DISABLED: this seems to be bogus on some firmware */
{ 6, "Digital In" }, /* FU */
/* 7: IT line */
{ 8, "Line Playback" }, /* FU */
/* 9: IT mic */
{ 10, "Mic Playback" }, /* FU */
{ 11, "Capture Input Source" }, /* SU */
{ 12, "Capture" }, /* FU */
/* 13: OT pcm capture */
/* 14: MU (w/o controls) */
/* 15: PU (3D enh) */
/* 16: MU (w/o controls) */
{ 17, NULL, 1 }, /* DISABLED: PU-switch (any effect?) */
{ 17, "Channel Routing", 2 }, /* PU: mode select */
{ 18, "Tone Control - Bass", USB_FEATURE_BASS }, /* FU */
{ 18, "Tone Control - Treble", USB_FEATURE_TREBLE }, /* FU */
{ 18, "Master Playback" }, /* FU; others */
/* 19: OT speaker */
/* 20: OT headphone */
{ 21, NULL }, /* DISABLED: EU (for what?) */
{ 22, "Digital Out Playback" }, /* FU */
{ 23, "Digital Out1 Playback" }, /* FU */ /* FIXME: corresponds to 24 */
/* 24: OT digital out */
{ 25, "IEC958 Optical Playback" }, /* FU */
{ 26, "IEC958 Optical Playback" }, /* OT */
{ 27, NULL }, /* DISABLED: EU (for what?) */
/* 28: FU speaker (mute) */
{ 29, NULL }, /* Digital Input Playback Source? */
{ 0 } /* terminator */
};
/* Sound Blaster MP3+ controls mapping
* The default mixer channels have totally misleading names,
* e.g. no Master and fake PCM volume
* Pavel Mihaylov <bin@bash.info>
*/
static struct usbmix_name_map mp3plus_map[] = {
/* 1: IT pcm */
/* 2: IT mic */
/* 3: IT line */
/* 4: IT digital in */
/* 5: OT digital out */
/* 6: OT speaker */
/* 7: OT pcm capture */
{ 8, "Capture Input Source" }, /* FU, default PCM Capture Source */
/* (Mic, Input 1 = Line input, Input 2 = Optical input) */
{ 9, "Master Playback" }, /* FU, default Speaker 1 */
/* { 10, "Mic Capture", 1 }, */ /* FU, Mic Capture */
/* { 10, "Mic Capture", 2 }, */ /* FU, Mic Capture */
{ 10, "Mic Boost", 7 }, /* FU, default Auto Gain Input */
{ 11, "Line Capture" }, /* FU, default PCM Capture */
{ 12, "Digital In Playback" }, /* FU, default PCM 1 */
/* { 13, "Mic Playback" }, */ /* FU, default Mic Playback */
{ 14, "Line Playback" }, /* FU, default Speaker */
/* 15: MU */
{ 0 } /* terminator */
};
/* Topology of SB Audigy 2 NX
+----------------------------->EU[27]--+
| v
| +----------------------------------->SU[29]---->FU[22]-->Dig_OUT[24]
| | ^
USB_IN[1]-+------------+ +->EU[17]->+->FU[11]-+
| v | v |
Dig_IN[4]---+->FU[6]-->MU[16]->FU[18]-+->EU[21]->SU[31]----->FU[30]->Hph_OUT[20]
| ^ | |
Lin_IN[7]-+--->FU[8]---+ +->EU[23]->FU[28]------------->Spk_OUT[19]
| | v
+--->FU[12]------------------------------------->SU[14]--->USB_OUT[15]
| ^
+->FU[13]--------------------------------------+
*/
static struct usbmix_name_map audigy2nx_map[] = {
/* 1: IT pcm playback */
/* 4: IT digital in */
{ 6, "Digital In Playback" }, /* FU */
/* 7: IT line in */
{ 8, "Line Playback" }, /* FU */
{ 11, "What-U-Hear Capture" }, /* FU */
{ 12, "Line Capture" }, /* FU */
{ 13, "Digital In Capture" }, /* FU */
{ 14, "Capture Source" }, /* SU */
/* 15: OT pcm capture */
/* 16: MU w/o controls */
{ 17, NULL }, /* DISABLED: EU (for what?) */
{ 18, "Master Playback" }, /* FU */
/* 19: OT speaker */
/* 20: OT headphone */
{ 21, NULL }, /* DISABLED: EU (for what?) */
{ 22, "Digital Out Playback" }, /* FU */
{ 23, NULL }, /* DISABLED: EU (for what?) */
/* 24: OT digital out */
{ 27, NULL }, /* DISABLED: EU (for what?) */
{ 28, "Speaker Playback" }, /* FU */
{ 29, "Digital Out Source" }, /* SU */
{ 30, "Headphone Playback" }, /* FU */
{ 31, "Headphone Source" }, /* SU */
{ 0 } /* terminator */
};
static struct usbmix_selector_map audigy2nx_selectors[] = {
{
.id = 14, /* Capture Source */
.count = 3,
.names = (const char*[]) {"Line", "Digital In", "What-U-Hear"}
},
{
.id = 29, /* Digital Out Source */
.count = 3,
.names = (const char*[]) {"Front", "PCM", "Digital In"}
},
{
.id = 31, /* Headphone Source */
.count = 2,
.names = (const char*[]) {"Front", "Side"}
},
{ 0 } /* terminator */
};
/* LineX FM Transmitter entry - needed to bypass controls bug */
static struct usbmix_name_map linex_map[] = {
/* 1: IT pcm */
/* 2: OT Speaker */
{ 3, "Master" }, /* FU: master volume - left / right / mute */
{ 0 } /* terminator */
};
static struct usbmix_name_map maya44_map[] = {
/* 1: IT line */
{ 2, "Line Playback" }, /* FU */
/* 3: IT line */
{ 4, "Line Playback" }, /* FU */
/* 5: IT pcm playback */
/* 6: MU */
{ 7, "Master Playback" }, /* FU */
/* 8: OT speaker */
/* 9: IT line */
{ 10, "Line Capture" }, /* FU */
/* 11: MU */
/* 12: OT pcm capture */
{ }
};
/* Section "justlink_map" below added by James Courtier-Dutton <James@superbug.demon.co.uk>
* sourced from Maplin Electronics (http://www.maplin.co.uk), part number A56AK
* Part has 2 connectors that act as a single output. (TOSLINK Optical for digital out, and 3.5mm Jack for Analogue out.)
* The USB Mixer publishes a Microphone and extra Volume controls for it, but none exist on the device,
* so this map removes all unwanted sliders from alsamixer
*/
static struct usbmix_name_map justlink_map[] = {
/* 1: IT pcm playback */
/* 2: Not present */
{ 3, NULL}, /* IT mic (No mic input on device) */
/* 4: Not present */
/* 5: OT speacker */
/* 6: OT pcm capture */
{ 7, "Master Playback" }, /* Mute/volume for speaker */
{ 8, NULL }, /* Capture Switch (No capture inputs on device) */
{ 9, NULL }, /* Capture Mute/volume (No capture inputs on device */
/* 0xa: Not present */
/* 0xb: MU (w/o controls) */
{ 0xc, NULL }, /* Mic feedback Mute/volume (No capture inputs on device) */
{ 0 } /* terminator */
};
/* TerraTec Aureon 5.1 MkII USB */
static struct usbmix_name_map aureon_51_2_map[] = {
/* 1: IT USB */
/* 2: IT Mic */
/* 3: IT Line */
/* 4: IT SPDIF */
/* 5: OT SPDIF */
/* 6: OT Speaker */
/* 7: OT USB */
{ 8, "Capture Source" }, /* SU */
{ 9, "Master Playback" }, /* FU */
{ 10, "Mic Capture" }, /* FU */
{ 11, "Line Capture" }, /* FU */
{ 12, "IEC958 In Capture" }, /* FU */
{ 13, "Mic Playback" }, /* FU */
{ 14, "Line Playback" }, /* FU */
/* 15: MU */
{} /* terminator */
};
/*
* Control map entries
*/
static struct usbmix_ctl_map usbmix_ctl_maps[] = {
{
.id = USB_ID(0x041e, 0x3000),
.map = extigy_map,
.ignore_ctl_error = 1,
},
{
.id = USB_ID(0x041e, 0x3010),
.map = mp3plus_map,
},
{
.id = USB_ID(0x041e, 0x3020),
.map = audigy2nx_map,
.selector_map = audigy2nx_selectors,
},
{
/* Hercules DJ Console (Windows Edition) */
.id = USB_ID(0x06f8, 0xb000),
.ignore_ctl_error = 1,
},
{
/* Hercules DJ Console (Macintosh Edition) */
.id = USB_ID(0x06f8, 0xd002),
.ignore_ctl_error = 1,
},
{
.id = USB_ID(0x08bb, 0x2702),
.map = linex_map,
.ignore_ctl_error = 1,
},
{
.id = USB_ID(0x0a92, 0x0091),
.map = maya44_map,
},
{
.id = USB_ID(0x0c45, 0x1158),
.map = justlink_map,
},
{
.id = USB_ID(0x0ccd, 0x0028),
.map = aureon_51_2_map,
},
{ 0 } /* terminator */
};
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