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[GFS2] possible null pointer dereference fixup

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gfs2_alloc_get may fail so we have to check it to prevent
NULL pointer dereference.

Signed-off-by: Cyrill Gorcunov <gorcunov@gamil.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Cyrill Gorcunov 2008-03-03 21:54:21 +03:00 committed by Steven Whitehouse
parent 105284970b
commit 182fe5abd8
7 changed files with 44 additions and 8 deletions
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5
fs/gfs2/bmap.c
View File

@ -900,6 +900,8 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
int error;
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -1081,7 +1083,8 @@ static int trunc_dealloc(struct gfs2_inode *ip, u64 size)
lblock = (size - 1) >> sdp->sd_sb.sb_bsize_shift;
find_metapath(sdp, lblock, &mp, ip->i_height);
gfs2_alloc_get(ip);
if (!gfs2_alloc_get(ip))
return -ENOMEM;
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)

10
fs/gfs2/dir.c
View File

@ -1868,11 +1868,14 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
if (!ht)
return -ENOMEM;
gfs2_alloc_get(dip);
if (!gfs2_alloc_get(dip)) {
error = -ENOMEM;
goto out;
}
error = gfs2_quota_hold(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
goto out;
goto out_put;
error = gfs2_rindex_hold(sdp, &dip->i_alloc->al_ri_gh);
if (error)
@ -1946,8 +1949,9 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
gfs2_glock_dq_uninit(&dip->i_alloc->al_ri_gh);
out_qs:
gfs2_quota_unhold(dip);
out:
out_put:
gfs2_alloc_put(dip);
out:
kfree(ht);
return error;
}

6
fs/gfs2/eattr.c
View File

@ -318,6 +318,8 @@ static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
int error;
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -681,6 +683,8 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
int error;
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -1464,6 +1468,8 @@ int gfs2_ea_dealloc(struct gfs2_inode *ip)
int error;
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)

7
fs/gfs2/inode.c
View File

@ -351,6 +351,8 @@ int gfs2_dinode_dealloc(struct gfs2_inode *ip)
}
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -825,7 +827,8 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
int error;
munge_mode_uid_gid(dip, &mode, &uid, &gid);
gfs2_alloc_get(dip);
if (!gfs2_alloc_get(dip))
return -ENOMEM;
error = gfs2_quota_lock(dip, uid, gid);
if (error)
@ -860,6 +863,8 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
int error;
al = gfs2_alloc_get(dip);
if (!al)
return -ENOMEM;
error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)

4
fs/gfs2/ops_address.c
View File

@ -649,6 +649,10 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
if (alloc_required) {
al = gfs2_alloc_get(ip);
if (!al) {
error = -ENOMEM;
goto out_unlock;
}
error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)

11
fs/gfs2/ops_inode.c
View File

@ -200,6 +200,10 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
if (alloc_required) {
struct gfs2_alloc *al = gfs2_alloc_get(dip);
if (!al) {
error = -ENOMEM;
goto out_gunlock;
}
error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -716,6 +720,10 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
if (alloc_required) {
struct gfs2_alloc *al = gfs2_alloc_get(ndip);
if (!al) {
error = -ENOMEM;
goto out_gunlock;
}
error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
@ -953,7 +961,8 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
ogid = ngid = NO_QUOTA_CHANGE;
gfs2_alloc_get(ip);
if (!gfs2_alloc_get(ip))
return -ENOMEM;
error = gfs2_quota_lock(ip, nuid, ngid);
if (error)

9
fs/gfs2/quota.c
View File

@ -617,8 +617,9 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
int err = -EIO;
if (gfs2_is_stuffed(ip)) {
struct gfs2_alloc *al = NULL;
al = gfs2_alloc_get(ip);
struct gfs2_alloc *al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
/* just request 1 blk */
al->al_requested = 1;
gfs2_inplace_reserve(ip);
@ -729,6 +730,10 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
if (nalloc) {
al = gfs2_alloc_get(ip);
if (!al) {
error = -ENOMEM;
goto out_gunlock;
}
al->al_requested = nalloc * (data_blocks + ind_blocks);