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-rw-r--r--fs/proc/array.c10
-rw-r--r--fs/proc/fd.c48
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/proc/meminfo.c2
-rw-r--r--fs/proc/stat.c3
-rw-r--r--fs/proc/task_mmu.c8
6 files changed, 31 insertions, 42 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 65ec2029fa80..a23c3e220a5f 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -56,6 +56,7 @@
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/time.h>
+#include <linux/time_namespace.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/tty.h>
@@ -382,9 +383,9 @@ 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_printf(m, "Cpus_allowed:\t%*pb\n",
- cpumask_pr_args(task->cpus_ptr));
+ cpumask_pr_args(&task->cpus_mask));
seq_printf(m, "Cpus_allowed_list:\t%*pbl\n",
- cpumask_pr_args(task->cpus_ptr));
+ cpumask_pr_args(&task->cpus_mask));
}
static inline void task_core_dumping(struct seq_file *m, struct mm_struct *mm)
@@ -533,8 +534,9 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
priority = task_prio(task);
nice = task_nice(task);
- /* convert nsec -> ticks */
- start_time = nsec_to_clock_t(task->start_boottime);
+ /* apply timens offset for boottime and convert nsec -> ticks */
+ start_time =
+ nsec_to_clock_t(timens_add_boottime_ns(task->start_boottime));
seq_put_decimal_ull(m, "", pid_nr_ns(pid, ns));
seq_puts(m, " (");
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 81882a13212d..cb51763ed554 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -28,14 +28,13 @@ static int seq_show(struct seq_file *m, void *v)
if (!task)
return -ENOENT;
- files = get_files_struct(task);
- put_task_struct(task);
-
+ task_lock(task);
+ files = task->files;
if (files) {
unsigned int fd = proc_fd(m->private);
spin_lock(&files->file_lock);
- file = fcheck_files(files, fd);
+ file = files_lookup_fd_locked(files, fd);
if (file) {
struct fdtable *fdt = files_fdtable(files);
@@ -47,8 +46,9 @@ static int seq_show(struct seq_file *m, void *v)
ret = 0;
}
spin_unlock(&files->file_lock);
- put_files_struct(files);
}
+ task_unlock(task);
+ put_task_struct(task);
if (ret)
return ret;
@@ -57,6 +57,7 @@ static int seq_show(struct seq_file *m, void *v)
(long long)file->f_pos, f_flags,
real_mount(file->f_path.mnt)->mnt_id);
+ /* show_fd_locks() never deferences files so a stale value is safe */
show_fd_locks(m, file, files);
if (seq_has_overflowed(m))
goto out;
@@ -83,18 +84,13 @@ static const struct file_operations proc_fdinfo_file_operations = {
static bool tid_fd_mode(struct task_struct *task, unsigned fd, fmode_t *mode)
{
- struct files_struct *files = get_files_struct(task);
struct file *file;
- if (!files)
- return false;
-
rcu_read_lock();
- file = fcheck_files(files, fd);
+ file = task_lookup_fd_rcu(task, fd);
if (file)
*mode = file->f_mode;
rcu_read_unlock();
- put_files_struct(files);
return !!file;
}
@@ -146,29 +142,22 @@ static const struct dentry_operations tid_fd_dentry_operations = {
static int proc_fd_link(struct dentry *dentry, struct path *path)
{
- struct files_struct *files = NULL;
struct task_struct *task;
int ret = -ENOENT;
task = get_proc_task(d_inode(dentry));
if (task) {
- files = get_files_struct(task);
- put_task_struct(task);
- }
-
- if (files) {
unsigned int fd = proc_fd(d_inode(dentry));
struct file *fd_file;
- spin_lock(&files->file_lock);
- fd_file = fcheck_files(files, fd);
+ fd_file = fget_task(task, fd);
if (fd_file) {
*path = fd_file->f_path;
path_get(&fd_file->f_path);
ret = 0;
+ fput(fd_file);
}
- spin_unlock(&files->file_lock);
- put_files_struct(files);
+ put_task_struct(task);
}
return ret;
@@ -229,7 +218,6 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
instantiate_t instantiate)
{
struct task_struct *p = get_proc_task(file_inode(file));
- struct files_struct *files;
unsigned int fd;
if (!p)
@@ -237,22 +225,18 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
if (!dir_emit_dots(file, ctx))
goto out;
- files = get_files_struct(p);
- if (!files)
- goto out;
rcu_read_lock();
- for (fd = ctx->pos - 2;
- fd < files_fdtable(files)->max_fds;
- fd++, ctx->pos++) {
+ for (fd = ctx->pos - 2;; fd++) {
struct file *f;
struct fd_data data;
char name[10 + 1];
unsigned int len;
- f = fcheck_files(files, fd);
+ f = task_lookup_next_fd_rcu(p, &fd);
+ ctx->pos = fd + 2LL;
if (!f)
- continue;
+ break;
data.mode = f->f_mode;
rcu_read_unlock();
data.fd = fd;
@@ -261,13 +245,11 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
if (!proc_fill_cache(file, ctx,
name, len, instantiate, p,
&data))
- goto out_fd_loop;
+ goto out;
cond_resched();
rcu_read_lock();
}
rcu_read_unlock();
-out_fd_loop:
- put_files_struct(files);
out:
put_task_struct(p);
return 0;
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index e502414b3556..4d2e64e9016c 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -193,8 +193,6 @@ kclist_add_private(unsigned long pfn, unsigned long nr_pages, void *arg)
return 1;
p = pfn_to_page(pfn);
- if (!memmap_valid_within(pfn, p, page_zone(p)))
- return 1;
ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 887a5532e449..d6fc74619625 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -107,7 +107,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
global_node_page_state(NR_KERNEL_SCS_KB));
#endif
show_val_kb(m, "PageTables: ",
- global_zone_page_state(NR_PAGETABLE));
+ global_node_page_state(NR_PAGETABLE));
show_val_kb(m, "NFS_Unstable: ", 0);
show_val_kb(m, "Bounce: ",
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 4695b6de3151..f25e8531fd27 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -10,6 +10,7 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/time_namespace.h>
#include <linux/irqnr.h>
#include <linux/sched/cputime.h>
#include <linux/tick.h>
@@ -118,6 +119,8 @@ static int show_stat(struct seq_file *p, void *v)
irq = softirq = steal = 0;
guest = guest_nice = 0;
getboottime64(&boottime);
+ /* shift boot timestamp according to the timens offset */
+ timens_sub_boottime(&boottime);
for_each_possible_cpu(i) {
struct kernel_cpustat kcpustat;
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;
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 01:50:06 +0000