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-rw-r--r--fs/proc/array.c44
-rw-r--r--fs/proc/generic.c27
-rw-r--r--fs/proc/inode.c2
-rw-r--r--fs/proc/task_mmu.c16
-rw-r--r--fs/proc/vmcore.c8
5 files changed, 41 insertions, 56 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index bd117d065b8..1295a00ca31 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -81,6 +81,7 @@
#include <linux/pid_namespace.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
+#include <linux/string_helpers.h>
#include <linux/user_namespace.h>
#include <asm/pgtable.h>
@@ -89,39 +90,18 @@
static inline void task_name(struct seq_file *m, struct task_struct *p)
{
- int i;
- char *buf, *end;
- char *name;
+ char *buf;
char tcomm[sizeof(p->comm)];
get_task_comm(tcomm, p);
seq_puts(m, "Name:\t");
- end = m->buf + m->size;
buf = m->buf + m->count;
- name = tcomm;
- i = sizeof(tcomm);
- while (i && (buf < end)) {
- unsigned char c = *name;
- name++;
- i--;
- *buf = c;
- if (!c)
- break;
- if (c == '\\') {
- buf++;
- if (buf < end)
- *buf++ = c;
- continue;
- }
- if (c == '\n') {
- *buf++ = '\\';
- if (buf < end)
- *buf++ = 'n';
- continue;
- }
- buf++;
- }
+
+ /* Ignore error for now */
+ string_escape_str(tcomm, &buf, m->size - m->count,
+ ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+
m->count = buf - m->buf;
seq_putc(m, '\n');
}
@@ -336,12 +316,10 @@ static inline void task_context_switch_counts(struct seq_file *m,
static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
{
- seq_puts(m, "Cpus_allowed:\t");
- seq_cpumask(m, &task->cpus_allowed);
- seq_putc(m, '\n');
- seq_puts(m, "Cpus_allowed_list:\t");
- seq_cpumask_list(m, &task->cpus_allowed);
- seq_putc(m, '\n');
+ seq_printf(m, "Cpus_allowed:\t%*pb\n",
+ cpumask_pr_args(&task->cpus_allowed));
+ seq_printf(m, "Cpus_allowed_list:\t%*pbl\n",
+ cpumask_pr_args(&task->cpus_allowed));
}
int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 7fea13229f3..3309f59d421 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -122,7 +122,7 @@ static int proc_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
struct inode *inode = dentry->d_inode;
- struct proc_dir_entry *de = PROC_I(inode)->pde;
+ struct proc_dir_entry *de = PDE(inode);
if (de && de->nlink)
set_nlink(inode, de->nlink);
@@ -350,29 +350,12 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
if (ret)
return ret;
- if (S_ISDIR(dp->mode)) {
- dp->proc_fops = &proc_dir_operations;
- dp->proc_iops = &proc_dir_inode_operations;
- dir->nlink++;
- } else if (S_ISLNK(dp->mode)) {
- dp->proc_iops = &proc_link_inode_operations;
- } else if (S_ISREG(dp->mode)) {
- BUG_ON(dp->proc_fops == NULL);
- dp->proc_iops = &proc_file_inode_operations;
- } else {
- WARN_ON(1);
- proc_free_inum(dp->low_ino);
- return -EINVAL;
- }
-
spin_lock(&proc_subdir_lock);
dp->parent = dir;
if (pde_subdir_insert(dir, dp) == false) {
WARN(1, "proc_dir_entry '%s/%s' already registered\n",
dir->name, dp->name);
spin_unlock(&proc_subdir_lock);
- if (S_ISDIR(dp->mode))
- dir->nlink--;
proc_free_inum(dp->low_ino);
return -EEXIST;
}
@@ -431,6 +414,7 @@ struct proc_dir_entry *proc_symlink(const char *name,
ent->data = kmalloc((ent->size=strlen(dest))+1, GFP_KERNEL);
if (ent->data) {
strcpy((char*)ent->data,dest);
+ ent->proc_iops = &proc_link_inode_operations;
if (proc_register(parent, ent) < 0) {
kfree(ent->data);
kfree(ent);
@@ -456,8 +440,12 @@ struct proc_dir_entry *proc_mkdir_data(const char *name, umode_t mode,
ent = __proc_create(&parent, name, S_IFDIR | mode, 2);
if (ent) {
ent->data = data;
+ ent->proc_fops = &proc_dir_operations;
+ ent->proc_iops = &proc_dir_inode_operations;
+ parent->nlink++;
if (proc_register(parent, ent) < 0) {
kfree(ent);
+ parent->nlink--;
ent = NULL;
}
}
@@ -493,6 +481,8 @@ struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
return NULL;
}
+ BUG_ON(proc_fops == NULL);
+
if ((mode & S_IALLUGO) == 0)
mode |= S_IRUGO;
pde = __proc_create(&parent, name, mode, 1);
@@ -500,6 +490,7 @@ struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
goto out;
pde->proc_fops = proc_fops;
pde->data = data;
+ pde->proc_iops = &proc_file_inode_operations;
if (proc_register(parent, pde) < 0)
goto out_free;
return pde;
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 8420a2f8081..13a50a32652 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -40,7 +40,7 @@ static void proc_evict_inode(struct inode *inode)
put_pid(PROC_I(inode)->pid);
/* Let go of any associated proc directory entry */
- de = PROC_I(inode)->pde;
+ de = PDE(inode);
if (de)
pde_put(de);
head = PROC_I(inode)->sysctl;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 0e36c1e49fe..956b75d6180 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -732,6 +732,7 @@ enum clear_refs_types {
CLEAR_REFS_ANON,
CLEAR_REFS_MAPPED,
CLEAR_REFS_SOFT_DIRTY,
+ CLEAR_REFS_MM_HIWATER_RSS,
CLEAR_REFS_LAST,
};
@@ -907,6 +908,18 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
.mm = mm,
.private = &cp,
};
+
+ if (type == CLEAR_REFS_MM_HIWATER_RSS) {
+ /*
+ * Writing 5 to /proc/pid/clear_refs resets the peak
+ * resident set size to this mm's current rss value.
+ */
+ down_write(&mm->mmap_sem);
+ reset_mm_hiwater_rss(mm);
+ up_write(&mm->mmap_sem);
+ goto out_mm;
+ }
+
down_read(&mm->mmap_sem);
if (type == CLEAR_REFS_SOFT_DIRTY) {
for (vma = mm->mmap; vma; vma = vma->vm_next) {
@@ -928,6 +941,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
mmu_notifier_invalidate_range_end(mm, 0, -1);
flush_tlb_mm(mm);
up_read(&mm->mmap_sem);
+out_mm:
mmput(mm);
}
put_task_struct(task);
@@ -1543,6 +1557,8 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
for_each_node_state(nid, N_MEMORY)
if (md->node[nid])
seq_printf(m, " N%d=%lu", nid, md->node[nid]);
+
+ seq_printf(m, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma) >> 10);
out:
seq_putc(m, '\n');
m_cache_vma(m, vma);
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index a90d6d35419..4e61388ec03 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -546,8 +546,8 @@ static int __init update_note_header_size_elf64(const Elf64_Ehdr *ehdr_ptr)
nhdr_ptr = notes_section;
while (nhdr_ptr->n_namesz != 0) {
sz = sizeof(Elf64_Nhdr) +
- ((nhdr_ptr->n_namesz + 3) & ~3) +
- ((nhdr_ptr->n_descsz + 3) & ~3);
+ (((u64)nhdr_ptr->n_namesz + 3) & ~3) +
+ (((u64)nhdr_ptr->n_descsz + 3) & ~3);
if ((real_sz + sz) > max_sz) {
pr_warn("Warning: Exceeded p_memsz, dropping PT_NOTE entry n_namesz=0x%x, n_descsz=0x%x\n",
nhdr_ptr->n_namesz, nhdr_ptr->n_descsz);
@@ -732,8 +732,8 @@ static int __init update_note_header_size_elf32(const Elf32_Ehdr *ehdr_ptr)
nhdr_ptr = notes_section;
while (nhdr_ptr->n_namesz != 0) {
sz = sizeof(Elf32_Nhdr) +
- ((nhdr_ptr->n_namesz + 3) & ~3) +
- ((nhdr_ptr->n_descsz + 3) & ~3);
+ (((u64)nhdr_ptr->n_namesz + 3) & ~3) +
+ (((u64)nhdr_ptr->n_descsz + 3) & ~3);
if ((real_sz + sz) > max_sz) {
pr_warn("Warning: Exceeded p_memsz, dropping PT_NOTE entry n_namesz=0x%x, n_descsz=0x%x\n",
nhdr_ptr->n_namesz, nhdr_ptr->n_descsz);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-14 12:18:10 +0000