Revision bbdc74dc19e09ac4e71bfb219596b3d5bc786720 authored by Grzegorz Sluja on 13 July 2017, 09:17:58 UTC, committed by Ulf Hansson on 13 July 2017, 09:44:01 UTC
The commit 304419d8a7e9 ("mmc: core: Allocate per-request data using the
block layer core"), refactored the mechanism of queue handling, but also
made mmc_init_request() to be called after mmc_cleanup_queue(). This
triggers a null pointer dereference:
[ 683.123791] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 683.123801] IP: mmc_init_request+0x2c/0xf0 [mmc_block]
...
[ 683.123905] Call Trace:
[ 683.123913] alloc_request_size+0x4f/0x70
[ 683.123919] mempool_alloc+0x5f/0x150
[ 683.123925] ? __enqueue_entity+0x6c/0x70
[ 683.123928] get_request+0x3ad/0x720
[ 683.123933] ? prepare_to_wait_event+0x110/0x110
[ 683.123937] blk_queue_bio+0xc1/0x3a0
[ 683.123940] generic_make_request+0xf8/0x2a0
[ 683.123942] submit_bio+0x75/0x150
[ 683.123947] submit_bio_wait+0x51/0x70
[ 683.123951] blkdev_issue_flush+0x5c/0x90
[ 683.123956] ext4_sync_fs+0x171/0x1b0
[ 683.123961] sync_filesystem+0x73/0x90
[ 683.123965] fsync_bdev+0x24/0x50
[ 683.123971] invalidate_partition+0x24/0x50
[ 683.123973] del_gendisk+0xb2/0x2a0
[ 683.123977] mmc_blk_remove_req.part.38+0x71/0xa0 [mmc_block]
[ 683.123980] mmc_blk_remove+0xba/0x190 [mmc_block]
[ 683.123990] mmc_bus_remove+0x1a/0x20 [mmc_core]
[ 683.123995] device_release_driver_internal+0x141/0x200
[ 683.123999] device_release_driver+0x12/0x20
[ 683.124001] bus_remove_device+0xfd/0x170
[ 683.124004] device_del+0x1e8/0x330
[ 683.124012] mmc_remove_card+0x60/0xc0 [mmc_core]
[ 683.124019] mmc_remove+0x19/0x30 [mmc_core]
[ 683.124025] mmc_stop_host+0xfb/0x1a0 [mmc_core]
[ 683.124032] mmc_remove_host+0x1a/0x40 [mmc_core]
[ 683.124037] sdhci_remove_host+0x2e/0x1c0 [mmc_sdhci]
[ 683.124042] sdhci_pci_remove_slot+0x3f/0x80 [sdhci_pci]
[ 683.124045] sdhci_pci_remove+0x39/0x70 [sdhci_pci]
[ 683.124049] pci_device_remove+0x39/0xc0
[ 683.124052] device_release_driver_internal+0x141/0x200
[ 683.124056] driver_detach+0x3f/0x80
[ 683.124059] bus_remove_driver+0x55/0xd0
[ 683.124062] driver_unregister+0x2c/0x50
[ 683.124065] pci_unregister_driver+0x29/0x90
[ 683.124069] sdhci_driver_exit+0x10/0x4f3 [sdhci_pci]
[ 683.124073] SyS_delete_module+0x171/0x250
[ 683.124078] entry_SYSCALL_64_fastpath+0x1e/0xa9
Fix this by setting the queue DYING flag before cleanup the queue, as it
prevents new reqs from entering the queue.
Signed-off-by: Grzegorz Sluja <grzegorzx.sluja@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fixes: 304419d8a7e9 ("mmc: core: Allocate per-request data using the...")
[Ulf: Updated the changelog]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
1 parent aab2ee0
mixer_oss.h
#ifndef __SOUND_MIXER_OSS_H
#define __SOUND_MIXER_OSS_H
/*
* OSS MIXER API
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* 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
*
*/
#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
#define SNDRV_OSS_MAX_MIXERS 32
struct snd_mixer_oss_file;
struct snd_mixer_oss_slot {
int number;
unsigned int stereo: 1;
int (*get_volume)(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *chn,
int *left, int *right);
int (*put_volume)(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *chn,
int left, int right);
int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *chn,
int *active);
int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *chn,
int active);
unsigned long private_value;
void *private_data;
void (*private_free)(struct snd_mixer_oss_slot *slot);
int volume[2];
};
struct snd_mixer_oss {
struct snd_card *card;
char id[16];
char name[32];
struct snd_mixer_oss_slot slots[SNDRV_OSS_MAX_MIXERS]; /* OSS mixer slots */
unsigned int mask_recsrc; /* exclusive recsrc mask */
int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
unsigned int *active_index);
int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
unsigned int active_index);
void *private_data_recsrc;
void (*private_free_recsrc)(struct snd_mixer_oss *mixer);
struct mutex reg_mutex;
struct snd_info_entry *proc_entry;
int oss_dev_alloc;
/* --- */
int oss_recsrc;
};
struct snd_mixer_oss_file {
struct snd_card *card;
struct snd_mixer_oss *mixer;
};
int snd_mixer_oss_ioctl_card(struct snd_card *card,
unsigned int cmd, unsigned long arg);
#endif /* CONFIG_SND_MIXER_OSS */
#endif /* __SOUND_MIXER_OSS_H */
Computing file changes ...
