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for-linus-20190802

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Merge tag 'for-linus-20190802' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Here's a small collection of fixes that should go into this series.
  This contains:

   - io_uring potential use-after-free fix (Jackie)

   - loop regression fix (Jan)

   - O_DIRECT fragmented bio regression fix (Damien)

   - Mark Denis as the new floppy maintainer (Denis)

   - ataflop switch fall-through annotation (Gustavo)

   - libata zpodd overflow fix (Kees)

   - libata ahci deferred probe fix (Miquel)

   - nbd invalidation BUG_ON() fix (Munehisa)

   - dasd endless loop fix (Stefan)"

* tag 'for-linus-20190802' of git://git.kernel.dk/linux-block:
  s390/dasd: fix endless loop after read unit address configuration
  block: Fix __blkdev_direct_IO() for bio fragments
  MAINTAINERS: floppy: take over maintainership
  nbd: replace kill_bdev() with __invalidate_device() again
  ata: libahci: do not complain in case of deferred probe
  io_uring: fix KASAN use after free in io_sq_wq_submit_work
  loop: Fix mount(2) failure due to race with LOOP_SET_FD
  libata: zpodd: Fix small read overflow in zpodd_get_mech_type()
  ataflop: Mark expected switch fall-through
This commit is contained in:
Linus Torvalds 2019-08-02 14:31:26 -07:00
commit 10e5ddd71f
10 changed files with 101 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
MAINTAINERS
View File

@ -6322,7 +6322,8 @@ F: Documentation/devicetree/bindings/counter/ftm-quaddec.txt
F: drivers/counter/ftm-quaddec.c
FLOPPY DRIVER
S: Orphan
M: Denis Efremov <efremov@linux.com>
S: Odd Fixes
L: linux-block@vger.kernel.org
F: drivers/block/floppy.c

3
drivers/ata/libahci_platform.c
View File

@ -338,6 +338,9 @@ static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
hpriv->phys[port] = NULL;
rc = 0;
break;
case -EPROBE_DEFER:
/* Do not complain yet */
break;
default:
dev_err(dev,

2
drivers/ata/libata-zpodd.c
View File

@ -56,7 +56,7 @@ static enum odd_mech_type zpodd_get_mech_type(struct ata_device *dev)
unsigned int ret;
struct rm_feature_desc *desc;
struct ata_taskfile tf;
static const char cdb[] = { GPCMD_GET_CONFIGURATION,
static const char cdb[ATAPI_CDB_LEN] = { GPCMD_GET_CONFIGURATION,
2, /* only 1 feature descriptor requested */
0, 3, /* 3, removable medium feature */
0, 0, 0,/* reserved */

1
drivers/block/ataflop.c
View File

@ -1726,6 +1726,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
/* MSch: invalidate default_params */
default_params[drive].blocks = 0;
set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
/* Fall through */
case FDFMTEND:
case FDFLUSH:
/* invalidate the buffer track to force a reread */

16
drivers/block/loop.c
View File

@ -924,6 +924,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
struct file *file;
struct inode *inode;
struct address_space *mapping;
struct block_device *claimed_bdev = NULL;
int lo_flags = 0;
int error;
loff_t size;
@ -942,10 +943,11 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
* here to avoid changing device under exclusive owner.
*/
if (!(mode & FMODE_EXCL)) {
bdgrab(bdev);
error = blkdev_get(bdev, mode | FMODE_EXCL, loop_set_fd);
if (error)
claimed_bdev = bd_start_claiming(bdev, loop_set_fd);
if (IS_ERR(claimed_bdev)) {
error = PTR_ERR(claimed_bdev);
goto out_putf;
}
}
error = mutex_lock_killable(&loop_ctl_mutex);
@ -1015,15 +1017,15 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
mutex_unlock(&loop_ctl_mutex);
if (partscan)
loop_reread_partitions(lo, bdev);
if (!(mode & FMODE_EXCL))
blkdev_put(bdev, mode | FMODE_EXCL);
if (claimed_bdev)
bd_abort_claiming(bdev, claimed_bdev, loop_set_fd);
return 0;
out_unlock:
mutex_unlock(&loop_ctl_mutex);
out_bdev:
if (!(mode & FMODE_EXCL))
blkdev_put(bdev, mode | FMODE_EXCL);
if (claimed_bdev)
bd_abort_claiming(bdev, claimed_bdev, loop_set_fd);
out_putf:
fput(file);
out:

2
drivers/block/nbd.c
View File

@ -1231,7 +1231,7 @@ static void nbd_clear_sock_ioctl(struct nbd_device *nbd,
struct block_device *bdev)
{
sock_shutdown(nbd);
kill_bdev(bdev);
__invalidate_device(bdev, true);
nbd_bdev_reset(bdev);
if (test_and_clear_bit(NBD_HAS_CONFIG_REF,
&nbd->config->runtime_flags))

22
drivers/s390/block/dasd_alias.c
View File

@ -383,6 +383,20 @@ suborder_not_supported(struct dasd_ccw_req *cqr)
char msg_format;
char msg_no;
/*
* intrc values ENODEV, ENOLINK and EPERM
* will be optained from sleep_on to indicate that no
* IO operation can be started
*/
if (cqr->intrc == -ENODEV)
return 1;
if (cqr->intrc == -ENOLINK)
return 1;
if (cqr->intrc == -EPERM)
return 1;
sense = dasd_get_sense(&cqr->irb);
if (!sense)
return 0;
@ -447,12 +461,8 @@ static int read_unit_address_configuration(struct dasd_device *device,
lcu->flags &= ~NEED_UAC_UPDATE;
spin_unlock_irqrestore(&lcu->lock, flags);
do {
rc = dasd_sleep_on(cqr);
if (rc && suborder_not_supported(cqr))
return -EOPNOTSUPP;
} while (rc && (cqr->retries > 0));
if (rc) {
rc = dasd_sleep_on(cqr);
if (rc && !suborder_not_supported(cqr)) {
spin_lock_irqsave(&lcu->lock, flags);
lcu->flags |= NEED_UAC_UPDATE;
spin_unlock_irqrestore(&lcu->lock, flags);

86
fs/block_dev.c
View File

@ -439,6 +439,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
ret = -EAGAIN;
goto error;
}
ret = dio->size;
if (polled)
WRITE_ONCE(iocb->ki_cookie, qc);
@ -465,7 +466,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
ret = -EAGAIN;
goto error;
}
ret += bio->bi_iter.bi_size;
ret = dio->size;
bio = bio_alloc(gfp, nr_pages);
if (!bio) {
@ -1181,8 +1182,7 @@ static struct gendisk *bdev_get_gendisk(struct block_device *bdev, int *partno)
* Pointer to the block device containing @bdev on success, ERR_PTR()
* value on failure.
*/
static struct block_device *bd_start_claiming(struct block_device *bdev,
void *holder)
struct block_device *bd_start_claiming(struct block_device *bdev, void *holder)
{
struct gendisk *disk;
struct block_device *whole;
@ -1229,6 +1229,62 @@ static struct block_device *bd_start_claiming(struct block_device *bdev,
return ERR_PTR(err);
}
}
EXPORT_SYMBOL(bd_start_claiming);
static void bd_clear_claiming(struct block_device *whole, void *holder)
{
lockdep_assert_held(&bdev_lock);
/* tell others that we're done */
BUG_ON(whole->bd_claiming != holder);
whole->bd_claiming = NULL;
wake_up_bit(&whole->bd_claiming, 0);
}
/**
* bd_finish_claiming - finish claiming of a block device
* @bdev: block device of interest
* @whole: whole block device (returned from bd_start_claiming())
* @holder: holder that has claimed @bdev
*
* Finish exclusive open of a block device. Mark the device as exlusively
* open by the holder and wake up all waiters for exclusive open to finish.
*/
void bd_finish_claiming(struct block_device *bdev, struct block_device *whole,
void *holder)
{
spin_lock(&bdev_lock);
BUG_ON(!bd_may_claim(bdev, whole, holder));
/*
* Note that for a whole device bd_holders will be incremented twice,
* and bd_holder will be set to bd_may_claim before being set to holder
*/
whole->bd_holders++;
whole->bd_holder = bd_may_claim;
bdev->bd_holders++;
bdev->bd_holder = holder;
bd_clear_claiming(whole, holder);
spin_unlock(&bdev_lock);
}
EXPORT_SYMBOL(bd_finish_claiming);
/**
* bd_abort_claiming - abort claiming of a block device
* @bdev: block device of interest
* @whole: whole block device (returned from bd_start_claiming())
* @holder: holder that has claimed @bdev
*
* Abort claiming of a block device when the exclusive open failed. This can be
* also used when exclusive open is not actually desired and we just needed
* to block other exclusive openers for a while.
*/
void bd_abort_claiming(struct block_device *bdev, struct block_device *whole,
void *holder)
{
spin_lock(&bdev_lock);
bd_clear_claiming(whole, holder);
spin_unlock(&bdev_lock);
}
EXPORT_SYMBOL(bd_abort_claiming);
#ifdef CONFIG_SYSFS
struct bd_holder_disk {
@ -1698,29 +1754,7 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)
/* finish claiming */
mutex_lock(&bdev->bd_mutex);
spin_lock(&bdev_lock);
if (!res) {
BUG_ON(!bd_may_claim(bdev, whole, holder));
/*
* Note that for a whole device bd_holders
* will be incremented twice, and bd_holder
* will be set to bd_may_claim before being
* set to holder
*/
whole->bd_holders++;
whole->bd_holder = bd_may_claim;
bdev->bd_holders++;
bdev->bd_holder = holder;
}
/* tell others that we're done */
BUG_ON(whole->bd_claiming != holder);
whole->bd_claiming = NULL;
wake_up_bit(&whole->bd_claiming, 0);
spin_unlock(&bdev_lock);
bd_finish_claiming(bdev, whole, holder);
/*
* Block event polling for write claims if requested. Any
* write holder makes the write_holder state stick until

3
fs/io_uring.c
View File

@ -1838,6 +1838,7 @@ static void io_sq_wq_submit_work(struct work_struct *work)
do {
struct sqe_submit *s = &req->submit;
const struct io_uring_sqe *sqe = s->sqe;
unsigned int flags = req->flags;
/* Ensure we clear previously set non-block flag */
req->rw.ki_flags &= ~IOCB_NOWAIT;
@ -1883,7 +1884,7 @@ static void io_sq_wq_submit_work(struct work_struct *work)
kfree(sqe);
/* req from defer and link list needn't decrease async cnt */
if (req->flags & (REQ_F_IO_DRAINED | REQ_F_LINK_DONE))
if (flags & (REQ_F_IO_DRAINED | REQ_F_LINK_DONE))
goto out;
if (!async_list)

6
include/linux/fs.h
View File

@ -2598,6 +2598,12 @@ extern struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
void *holder);
extern struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode,
void *holder);
extern struct block_device *bd_start_claiming(struct block_device *bdev,
void *holder);
extern void bd_finish_claiming(struct block_device *bdev,
struct block_device *whole, void *holder);
extern void bd_abort_claiming(struct block_device *bdev,
struct block_device *whole, void *holder);
extern void blkdev_put(struct block_device *bdev, fmode_t mode);
extern int __blkdev_reread_part(struct block_device *bdev);
extern int blkdev_reread_part(struct block_device *bdev);