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BKL: Explicitly add BKL around get_sb/fill_super 

This patch is a preparation necessary to remove the BKL from do_new_mount().
It explicitly adds calls to lock_kernel()/unlock_kernel() around
get_sb/fill_super operations for filesystems that still uses the BKL.

I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.

do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.

Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.

[arnd: do not add the BKL to those file systems that already
       don't use it elsewhere]

Signed-off-by: Jan Blunck <jblunck@infradead.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Christoph Hellwig <hch@infradead.org>
This commit is contained in:
Jan Blunck 2010-08-15 22:51:10 +02:00 committed by Arnd Bergmann
parent 899611ee7d
commit db71922217
28 changed files with 187 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/adfs/super.c
View File

@ -352,11 +352,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
lock_kernel();
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
if (!asb)
if (!asb) {
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = asb;
/* set default options */
@ -474,6 +478,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
unlock_kernel();
return 0;
error_free_bh:
@ -481,6 +486,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
unlock_kernel();
return -EINVAL;
}

9
fs/affs/super.c
View File

@ -291,6 +291,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
lock_kernel();
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@ -300,8 +302,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
spin_lock_init(&sbi->symlink_lock);
@ -312,6 +316,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
printk(KERN_ERR "AFFS: Error parsing options\n");
kfree(sbi->s_prefix);
kfree(sbi);
unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@ -482,6 +487,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
unlock_kernel();
return 0;
/*
@ -496,6 +502,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
unlock_kernel();
return ret;
}

5
fs/afs/super.c
View File

@ -302,12 +302,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
lock_kernel();
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
unlock_kernel();
return -ENOMEM;
}
@ -341,6 +344,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
unlock_kernel();
return 0;
error_inode:
@ -354,6 +358,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
unlock_kernel();
return ret;
}

8
fs/bfs/inode.c
View File

@ -322,9 +322,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
int ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
lock_kernel();
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
if (!info) {
unlock_kernel();
return -ENOMEM;
}
mutex_init(&info->bfs_lock);
s->s_fs_info = info;
@ -439,6 +443,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
brelse(sbh);
dump_imap("read_super", s);
unlock_kernel();
return 0;
out3:
@ -452,6 +457,7 @@ out:
mutex_destroy(&info->bfs_lock);
kfree(info);
s->s_fs_info = NULL;
unlock_kernel();
return ret;
}

12
fs/cifs/cifsfs.c
View File

@ -514,22 +514,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
struct super_block *sb;
lock_kernel();
sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
if (IS_ERR(sb))
if (IS_ERR(sb)) {
unlock_kernel();
return PTR_ERR(sb);
}
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
unlock_kernel();
return 0;
}

8
fs/coda/inode.c
View File

@ -148,6 +148,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
lock_kernel();
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@ -159,11 +161,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
unlock_kernel();
return -EBUSY;
}
@ -202,7 +206,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
return 0;
unlock_kernel();
return 0;
error:
bdi_destroy(&vc->bdi);
@ -212,6 +217,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
unlock_kernel();
return -EINVAL;
}

4
fs/ecryptfs/main.c
View File

@ -36,6 +36,7 @@
#include <linux/parser.h>
#include <linux/fs_stack.h>
#include <linux/slab.h>
#include <linux/smp_lock.h> /* For lock_kernel() */
#include "ecryptfs_kernel.h"
/**
@ -550,6 +551,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
const char *err = "Getting sb failed";
int rc;
lock_kernel();
sbi = kmem_cache_zalloc(ecryptfs_sb_info_cache, GFP_KERNEL);
if (!sbi) {
rc = -ENOMEM;
@ -608,6 +610,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
goto out;
}
simple_set_mnt(mnt, s);
unlock_kernel();
return 0;
out:
@ -616,6 +619,7 @@ out:
kmem_cache_free(ecryptfs_sb_info_cache, sbi);
}
printk(KERN_ERR "%s; rc = [%d]\n", err, rc);
unlock_kernel();
return rc;
}

10
fs/ext2/super.c
View File

@ -747,15 +747,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
lock_kernel();
err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
return -ENOMEM;
goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@ -1083,6 +1086,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY))
sb->s_flags |= MS_RDONLY;
ext2_write_super(sb);
unlock_kernel();
return 0;
cantfind_ext2:
@ -1107,6 +1111,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
failed_unlock:
unlock_kernel();
return ret;
}

9
fs/ext3/super.c
View File

@ -1611,14 +1611,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
lock_kernel();
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@ -2026,6 +2031,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
unlock_kernel();
return 0;
cantfind_ext3:
@ -2056,6 +2062,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
unlock_kernel();
return ret;
}

8
fs/ext4/super.c
View File

@ -2568,6 +2568,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
lock_kernel();
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto out_free_orig;
@ -3166,7 +3168,6 @@ no_journal:
if (es->s_error_count)
mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */
lock_kernel();
kfree(orig_data);
return 0;
@ -3213,8 +3214,11 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
kfree(orig_data);
return ret;
out_free_orig:
unlock_kernel();
kfree(orig_data);
return ret;
}

7
fs/fat/namei_msdos.c
View File

@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/time.h>
#include <linux/buffer_head.h>
#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/* Characters that are undesirable in an MS-DOS file name */
@ -662,12 +663,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
if (res)
if (res) {
unlock_kernel();
return res;
}
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
unlock_kernel();
return 0;
}

7
fs/fat/namei_vfat.c
View File

@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/namei.h>
#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/*
@ -1055,15 +1056,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
if (res)
if (res) {
unlock_kernel();
return res;
}
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
unlock_kernel();
return 0;
}

7
fs/freevxfs/vxfs_super.c
View File

@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
* We are under the bkl and @sbp->s_lock.
* We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
lock_kernel();
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
unlock_kernel();
return -ENOMEM;
}
@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
unlock_kernel();
return 0;
out_free_ilist:
@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
unlock_kernel();
return ret;
}

8
fs/hfs/super.c
View File

@ -382,9 +382,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
lock_kernel();
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@ -435,6 +439,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
unlock_kernel();
return 0;
bail_iput:
@ -443,6 +448,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
unlock_kernel();
return res;
}

8
fs/hpfs/super.c
View File

@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
lock_kernel();
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
unlock_kernel();
return 0;
bail4: brelse(bh2);
@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
unlock_kernel();
return -EINVAL;
}

8
fs/isofs/inode.c
View File

@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
lock_kernel();
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@ -900,6 +904,7 @@ root_found:
kfree(opt.iocharset);
unlock_kernel();
return 0;
/*
@ -939,6 +944,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
unlock_kernel();
return error;
}

11
fs/jffs2/super.c
View File

@ -146,14 +146,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
int ret;
lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c)
if (!c) {
unlock_kernel();
return -ENOMEM;
}
c->mtd = sb->s_mtd;
c->os_priv = sb;
@ -175,7 +180,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
return jffs2_do_fill_super(sb, data, silent);
ret = jffs2_do_fill_super(sb, data, silent);
unlock_kernel();
return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,

12
fs/jfs/super.c
View File

@ -438,14 +438,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
lock_kernel();
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
if (!new_valid_dev(sb->s_bdev->bd_dev))
if (!new_valid_dev(sb->s_bdev->bd_dev)) {
unlock_kernel();
return -EOVERFLOW;
}
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@ -542,6 +548,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
unlock_kernel();
return 0;
out_no_root:
@ -564,6 +571,7 @@ out_unload:
unload_nls(sbi->nls_tab);
out_kfree:
kfree(sbi);
unlock_kernel();
return ret;
}

8
fs/nilfs2/super.c
View File

@ -1113,9 +1113,12 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
lock_kernel();
sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type);
if (IS_ERR(sd.bdev))
if (IS_ERR(sd.bdev)) {
unlock_kernel();
return PTR_ERR(sd.bdev);
}
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@ -1198,6 +1201,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, mode);
simple_set_mnt(mnt, s);
unlock_kernel();
return 0;
failed_unlock:
@ -1206,6 +1210,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, mode);
unlock_kernel();
return err;
cancel_new:
@ -1218,6 +1223,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
unlock_kernel();
return err;
}

5
fs/ntfs/super.c
View File

@ -2732,6 +2732,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
lock_kernel();
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@ -2755,6 +2757,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@ -2942,6 +2945,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@ -3062,6 +3066,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
unlock_kernel();
return -EINVAL;
}

9
fs/ocfs2/dlmfs/dlmfs.c
View File

@ -44,6 +44,7 @@
#include <linux/string.h>
#include <linux/backing-dev.h>
#include <linux/poll.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@ -588,21 +589,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
lock_kernel();
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
if (!inode)
if (!inode) {
unlock_kernel();
return -ENOMEM;
}
root = d_alloc_root(inode);
if (!root) {
iput(inode);
unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
unlock_kernel();
return 0;
}

5
fs/ocfs2/super.c
View File

@ -1002,6 +1002,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
lock_kernel();
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@ -1179,6 +1181,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
unlock_kernel();
return status;
}
}
@ -1193,6 +1196,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
unlock_kernel();
return status;
read_super_error:
@ -1208,6 +1212,7 @@ read_super_error:
}
mlog_exit(status);
unlock_kernel();
return status;
}

8
fs/qnx4/inode.c
View File

@ -234,9 +234,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
lock_kernel();
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
if (!qs)
if (!qs) {
unlock_kernel();
return -ENOMEM;
}
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@ -284,6 +288,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
unlock_kernel();
return 0;
outi:
@ -293,6 +298,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
unlock_kernel();
return ret;
}

5
fs/smbfs/inode.c
View File

@ -501,6 +501,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
lock_kernel();
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@ -621,6 +623,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
unlock_kernel();
return 0;
out_no_root:
@ -643,9 +646,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
unlock_kernel();
return -ENOMEM;
}

6
fs/squashfs/super.c
View File

@ -87,11 +87,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start, xattr_id_table_start;
int err;
lock_kernel();
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@ -301,6 +304,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
unlock_kernel();
return 0;
failed_mount:
@ -315,11 +319,13 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
unlock_kernel();
return err;
failure:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
unlock_kernel();
return -ENOMEM;
}

8
fs/udf/super.c
View File

@ -1880,6 +1880,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
lock_kernel();
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@ -1888,8 +1890,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
if (!sbi)
if (!sbi) {
unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@ -2035,6 +2039,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
unlock_kernel();
return 0;
error_out:
@ -2055,6 +2060,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
unlock_kernel();
return -EINVAL;
}

5
fs/ufs/super.c
View File

@ -696,6 +696,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
lock_kernel();
uspi = NULL;
ubh = NULL;
flags = 0;
@ -1163,6 +1165,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
unlock_kernel();
return 0;
dalloc_failed:
@ -1174,10 +1177,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
unlock_kernel();
return -ENOMEM;
}

4
kernel/cgroup.c
View File

@ -1430,6 +1430,8 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
struct super_block *sb;
struct cgroupfs_root *new_root;
lock_kernel();
/* First find the desired set of subsystems */
mutex_lock(&cgroup_mutex);
ret = parse_cgroupfs_options(data, &opts);
@ -1559,6 +1561,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
simple_set_mnt(mnt, sb);
kfree(opts.release_agent);
kfree(opts.name);
unlock_kernel();
return 0;
drop_new_super:
@ -1568,6 +1571,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
out_err:
kfree(opts.release_agent);
kfree(opts.name);
unlock_kernel();
return ret;
}