diff options
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 21 | ||||
| -rw-r--r-- | fs/proc/vmcore.c | 4 |
2 files changed, 17 insertions, 8 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index a3a3eecef68..6cc77dc3f3f 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -297,16 +297,20 @@ static int proc_fd_link(struct inode *inode, struct dentry **dentry, struct vfsm files = get_files_struct(task); if (files) { - rcu_read_lock(); + /* + * We are not taking a ref to the file structure, so we must + * hold ->file_lock. + */ + spin_lock(&files->file_lock); file = fcheck_files(files, fd); if (file) { *mnt = mntget(file->f_vfsmnt); *dentry = dget(file->f_dentry); - rcu_read_unlock(); + spin_unlock(&files->file_lock); put_files_struct(files); return 0; } - rcu_read_unlock(); + spin_unlock(&files->file_lock); put_files_struct(files); } return -ENOENT; @@ -1523,7 +1527,12 @@ static struct dentry *proc_lookupfd(struct inode * dir, struct dentry * dentry, if (!files) goto out_unlock; inode->i_mode = S_IFLNK; - rcu_read_lock(); + + /* + * We are not taking a ref to the file structure, so we must + * hold ->file_lock. + */ + spin_lock(&files->file_lock); file = fcheck_files(files, fd); if (!file) goto out_unlock2; @@ -1531,7 +1540,7 @@ static struct dentry *proc_lookupfd(struct inode * dir, struct dentry * dentry, inode->i_mode |= S_IRUSR | S_IXUSR; if (file->f_mode & 2) inode->i_mode |= S_IWUSR | S_IXUSR; - rcu_read_unlock(); + spin_unlock(&files->file_lock); put_files_struct(files); inode->i_op = &proc_pid_link_inode_operations; inode->i_size = 64; @@ -1541,7 +1550,7 @@ static struct dentry *proc_lookupfd(struct inode * dir, struct dentry * dentry, return NULL; out_unlock2: - rcu_read_unlock(); + spin_unlock(&files->file_lock); put_files_struct(files); out_unlock: iput(inode); diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 7efa73d44c9..20d4b2237fc 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -103,8 +103,8 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) { ssize_t acc = 0, tmp; - size_t tsz, nr_bytes; - u64 start; + size_t tsz; + u64 start, nr_bytes; struct vmcore *curr_m = NULL; if (buflen == 0 || *fpos >= vmcore_size) |