diff options
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 2 | ||||
| -rw-r--r-- | fs/proc/cpuinfo.c | 2 | ||||
| -rw-r--r-- | fs/proc/generic.c | 4 | ||||
| -rw-r--r-- | fs/proc/inode.c | 2 | ||||
| -rw-r--r-- | fs/proc/self.c | 7 | ||||
| -rw-r--r-- | fs/proc/stat.c | 2 | ||||
| -rw-r--r-- | fs/proc/task_mmu.c | 8 |
7 files changed, 21 insertions, 6 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 0f707003dda5..b362523a9829 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1049,6 +1049,8 @@ static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count, oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) / OOM_SCORE_ADJ_MAX; put_task_struct(task); + if (oom_adj > OOM_ADJUST_MAX) + oom_adj = OOM_ADJUST_MAX; len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj); return simple_read_from_buffer(buf, count, ppos, buffer, len); } diff --git a/fs/proc/cpuinfo.c b/fs/proc/cpuinfo.c index d0989a443c77..419760fd77bd 100644 --- a/fs/proc/cpuinfo.c +++ b/fs/proc/cpuinfo.c @@ -19,7 +19,7 @@ static int cpuinfo_open(struct inode *inode, struct file *file) static const struct proc_ops cpuinfo_proc_ops = { .proc_flags = PROC_ENTRY_PERMANENT, .proc_open = cpuinfo_open, - .proc_read = seq_read, + .proc_read_iter = seq_read_iter, .proc_lseek = seq_lseek, .proc_release = seq_release, }; diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 2f9fa179194d..b84663252add 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -590,7 +590,7 @@ static int proc_seq_release(struct inode *inode, struct file *file) static const struct proc_ops proc_seq_ops = { /* not permanent -- can call into arbitrary seq_operations */ .proc_open = proc_seq_open, - .proc_read = seq_read, + .proc_read_iter = seq_read_iter, .proc_lseek = seq_lseek, .proc_release = proc_seq_release, }; @@ -621,7 +621,7 @@ static int proc_single_open(struct inode *inode, struct file *file) static const struct proc_ops proc_single_ops = { /* not permanent -- can call into arbitrary ->single_show */ .proc_open = proc_single_open, - .proc_read = seq_read, + .proc_read_iter = seq_read_iter, .proc_lseek = seq_lseek, .proc_release = single_release, }; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 58c075e2a452..bde6b6f69852 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -597,6 +597,7 @@ static const struct file_operations proc_iter_file_ops = { .llseek = proc_reg_llseek, .read_iter = proc_reg_read_iter, .write = proc_reg_write, + .splice_read = generic_file_splice_read, .poll = proc_reg_poll, .unlocked_ioctl = proc_reg_unlocked_ioctl, .mmap = proc_reg_mmap, @@ -622,6 +623,7 @@ static const struct file_operations proc_reg_file_ops_compat = { static const struct file_operations proc_iter_file_ops_compat = { .llseek = proc_reg_llseek, .read_iter = proc_reg_read_iter, + .splice_read = generic_file_splice_read, .write = proc_reg_write, .poll = proc_reg_poll, .unlocked_ioctl = proc_reg_unlocked_ioctl, diff --git a/fs/proc/self.c b/fs/proc/self.c index 72cd69bcaf4a..cc71ce3466dc 100644 --- a/fs/proc/self.c +++ b/fs/proc/self.c @@ -16,6 +16,13 @@ static const char *proc_self_get_link(struct dentry *dentry, pid_t tgid = task_tgid_nr_ns(current, ns); char *name; + /* + * Not currently supported. Once we can inherit all of struct pid, + * we can allow this. + */ + if (current->flags & PF_KTHREAD) + return ERR_PTR(-EOPNOTSUPP); + if (!tgid) return ERR_PTR(-ENOENT); /* max length of unsigned int in decimal + NULL term */ diff --git a/fs/proc/stat.c b/fs/proc/stat.c index 9df128ea9417..f25e8531fd27 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -229,7 +229,7 @@ static int stat_open(struct inode *inode, struct file *file) static const struct proc_ops stat_proc_ops = { .proc_flags = PROC_ENTRY_PERMANENT, .proc_open = stat_open, - .proc_read = seq_read, + .proc_read_iter = seq_read_iter, .proc_lseek = seq_lseek, .proc_release = single_release, }; diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 217aa2705d5d..ee5a235b3056 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1599,11 +1599,15 @@ static ssize_t pagemap_read(struct file *file, char __user *buf, src = *ppos; svpfn = src / PM_ENTRY_BYTES; - start_vaddr = svpfn << PAGE_SHIFT; end_vaddr = mm->task_size; /* watch out for wraparound */ - if (svpfn > mm->task_size >> PAGE_SHIFT) + start_vaddr = end_vaddr; + if (svpfn <= (ULONG_MAX >> PAGE_SHIFT)) + start_vaddr = untagged_addr(svpfn << PAGE_SHIFT); + + /* Ensure the address is inside the task */ + if (start_vaddr > mm->task_size) start_vaddr = end_vaddr; /* |