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Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/array.c207
-rw-r--r--fs/proc/base.c32
-rw-r--r--fs/proc/inode.c2
-rw-r--r--fs/proc/kcore.c18
-rw-r--r--fs/proc/meminfo.c38
-rw-r--r--fs/proc/namespaces.c3
-rw-r--r--fs/proc/self.c9
-rw-r--r--fs/proc/stat.c49
-rw-r--r--fs/proc/thread_self.c2
-rw-r--r--fs/proc/vmcore.c15
10 files changed, 187 insertions, 188 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 015cdc615dfb..c4478abd1bef 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -169,51 +169,45 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
task_unlock(p);
rcu_read_unlock();
- seq_printf(m,
- "State:\t%s\n"
- "Tgid:\t%d\n"
- "Pid:\t%d\n"
- "PPid:\t%d\n"
- "TracerPid:\t%d\n"
- "Uid:\t%d\t%d\t%d\t%d\n"
- "Gid:\t%d\t%d\t%d\t%d\n"
- "Ngid:\t%d\n"
- "FDSize:\t%d\nGroups:\t",
- get_task_state(p),
- tgid, pid_nr_ns(pid, ns), ppid, tpid,
- from_kuid_munged(user_ns, cred->uid),
- from_kuid_munged(user_ns, cred->euid),
- from_kuid_munged(user_ns, cred->suid),
- from_kuid_munged(user_ns, cred->fsuid),
- from_kgid_munged(user_ns, cred->gid),
- from_kgid_munged(user_ns, cred->egid),
- from_kgid_munged(user_ns, cred->sgid),
- from_kgid_munged(user_ns, cred->fsgid),
- ngid, max_fds);
-
+ seq_printf(m, "State:\t%s", get_task_state(p));
+
+ seq_put_decimal_ull(m, "\nTgid:\t", tgid);
+ seq_put_decimal_ull(m, "\nPid:\t", pid_nr_ns(pid, ns));
+ seq_put_decimal_ull(m, "\nPPid:\t", ppid);
+ seq_put_decimal_ull(m, "\nTracerPid:\t", tpid);
+ seq_put_decimal_ull(m, "\nUid:\t", from_kuid_munged(user_ns, cred->uid));
+ seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->euid));
+ seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->suid));
+ seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->fsuid));
+ seq_put_decimal_ull(m, "\nGid:\t", from_kgid_munged(user_ns, cred->gid));
+ seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->egid));
+ seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->sgid));
+ seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->fsgid));
+ seq_put_decimal_ull(m, "\nNgid:\t", ngid);
+ seq_put_decimal_ull(m, "\nFDSize:\t", max_fds);
+
+ seq_puts(m, "\nGroups:\t");
group_info = cred->group_info;
for (g = 0; g < group_info->ngroups; g++)
- seq_printf(m, "%d ",
- from_kgid_munged(user_ns, GROUP_AT(group_info, g)));
+ seq_put_decimal_ull(m, g ? " " : "",
+ from_kgid_munged(user_ns, GROUP_AT(group_info, g)));
put_cred(cred);
+ /* Trailing space shouldn't have been added in the first place. */
+ seq_putc(m, ' ');
#ifdef CONFIG_PID_NS
seq_puts(m, "\nNStgid:");
for (g = ns->level; g <= pid->level; g++)
- seq_printf(m, "\t%d",
- task_tgid_nr_ns(p, pid->numbers[g].ns));
+ seq_put_decimal_ull(m, "\t", task_tgid_nr_ns(p, pid->numbers[g].ns));
seq_puts(m, "\nNSpid:");
for (g = ns->level; g <= pid->level; g++)
- seq_printf(m, "\t%d",
- task_pid_nr_ns(p, pid->numbers[g].ns));
+ seq_put_decimal_ull(m, "\t", task_pid_nr_ns(p, pid->numbers[g].ns));
seq_puts(m, "\nNSpgid:");
for (g = ns->level; g <= pid->level; g++)
- seq_printf(m, "\t%d",
- task_pgrp_nr_ns(p, pid->numbers[g].ns));
+ seq_put_decimal_ull(m, "\t", task_pgrp_nr_ns(p, pid->numbers[g].ns));
seq_puts(m, "\nNSsid:");
for (g = ns->level; g <= pid->level; g++)
- seq_printf(m, "\t%d",
- task_session_nr_ns(p, pid->numbers[g].ns));
+ seq_put_decimal_ull(m, "\t", task_session_nr_ns(p, pid->numbers[g].ns));
#endif
seq_putc(m, '\n');
}
@@ -282,11 +276,12 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
unlock_task_sighand(p, &flags);
}
- seq_printf(m, "Threads:\t%d\n", num_threads);
- seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
+ seq_put_decimal_ull(m, "Threads:\t", num_threads);
+ seq_put_decimal_ull(m, "\nSigQ:\t", qsize);
+ seq_put_decimal_ull(m, "/", qlim);
/* render them all */
- render_sigset_t(m, "SigPnd:\t", &pending);
+ render_sigset_t(m, "\nSigPnd:\t", &pending);
render_sigset_t(m, "ShdPnd:\t", &shpending);
render_sigset_t(m, "SigBlk:\t", &blocked);
render_sigset_t(m, "SigIgn:\t", &ignored);
@@ -331,7 +326,8 @@ static inline void task_cap(struct seq_file *m, struct task_struct *p)
static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
{
#ifdef CONFIG_SECCOMP
- seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode);
+ seq_put_decimal_ull(m, "Seccomp:\t", p->seccomp.mode);
+ seq_putc(m, '\n');
#endif
seq_printf(m, "Speculation_Store_Bypass:\t");
switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_STORE_BYPASS)) {
@@ -363,10 +359,9 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
static inline void task_context_switch_counts(struct seq_file *m,
struct task_struct *p)
{
- seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
- "nonvoluntary_ctxt_switches:\t%lu\n",
- p->nvcsw,
- p->nivcsw);
+ seq_put_decimal_ull(m, "voluntary_ctxt_switches:\t", p->nvcsw);
+ seq_put_decimal_ull(m, "\nnonvoluntary_ctxt_switches:\t", p->nivcsw);
+ seq_putc(m, '\n');
}
static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
@@ -425,9 +420,21 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
mm = get_task_mm(task);
if (mm) {
vsize = task_vsize(mm);
- if (permitted) {
- eip = KSTK_EIP(task);
- esp = KSTK_ESP(task);
+ /*
+ * esp and eip are intentionally zeroed out. There is no
+ * non-racy way to read them without freezing the task.
+ * Programs that need reliable values can use ptrace(2).
+ *
+ * The only exception is if the task is core dumping because
+ * a program is not able to use ptrace(2) in that case. It is
+ * safe because the task has stopped executing permanently.
+ */
+ if (permitted && (task->flags & (PF_EXITING|PF_DUMPCORE))) {
+ if (try_get_task_stack(task)) {
+ eip = KSTK_EIP(task);
+ esp = KSTK_ESP(task);
+ put_task_stack(task);
+ }
}
}
@@ -498,41 +505,41 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
start_time = nsec_to_clock_t(task->real_start_time);
seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state);
- seq_put_decimal_ll(m, ' ', ppid);
- seq_put_decimal_ll(m, ' ', pgid);
- seq_put_decimal_ll(m, ' ', sid);
- seq_put_decimal_ll(m, ' ', tty_nr);
- seq_put_decimal_ll(m, ' ', tty_pgrp);
- seq_put_decimal_ull(m, ' ', task->flags);
- seq_put_decimal_ull(m, ' ', min_flt);
- seq_put_decimal_ull(m, ' ', cmin_flt);
- seq_put_decimal_ull(m, ' ', maj_flt);
- seq_put_decimal_ull(m, ' ', cmaj_flt);
- seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime));
- seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime));
- seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime));
- seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime));
- seq_put_decimal_ll(m, ' ', priority);
- seq_put_decimal_ll(m, ' ', nice);
- seq_put_decimal_ll(m, ' ', num_threads);
- seq_put_decimal_ull(m, ' ', 0);
- seq_put_decimal_ull(m, ' ', start_time);
- seq_put_decimal_ull(m, ' ', vsize);
- seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0);
- seq_put_decimal_ull(m, ' ', rsslim);
- seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0);
- seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0);
- seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0);
- seq_put_decimal_ull(m, ' ', esp);
- seq_put_decimal_ull(m, ' ', eip);
+ seq_put_decimal_ll(m, " ", ppid);
+ seq_put_decimal_ll(m, " ", pgid);
+ seq_put_decimal_ll(m, " ", sid);
+ seq_put_decimal_ll(m, " ", tty_nr);
+ seq_put_decimal_ll(m, " ", tty_pgrp);
+ seq_put_decimal_ull(m, " ", task->flags);
+ seq_put_decimal_ull(m, " ", min_flt);
+ seq_put_decimal_ull(m, " ", cmin_flt);
+ seq_put_decimal_ull(m, " ", maj_flt);
+ seq_put_decimal_ull(m, " ", cmaj_flt);
+ seq_put_decimal_ull(m, " ", cputime_to_clock_t(utime));
+ seq_put_decimal_ull(m, " ", cputime_to_clock_t(stime));
+ seq_put_decimal_ll(m, " ", cputime_to_clock_t(cutime));
+ seq_put_decimal_ll(m, " ", cputime_to_clock_t(cstime));
+ seq_put_decimal_ll(m, " ", priority);
+ seq_put_decimal_ll(m, " ", nice);
+ seq_put_decimal_ll(m, " ", num_threads);
+ seq_put_decimal_ull(m, " ", 0);
+ seq_put_decimal_ull(m, " ", start_time);
+ seq_put_decimal_ull(m, " ", vsize);
+ seq_put_decimal_ull(m, " ", mm ? get_mm_rss(mm) : 0);
+ seq_put_decimal_ull(m, " ", rsslim);
+ seq_put_decimal_ull(m, " ", mm ? (permitted ? mm->start_code : 1) : 0);
+ seq_put_decimal_ull(m, " ", mm ? (permitted ? mm->end_code : 1) : 0);
+ seq_put_decimal_ull(m, " ", (permitted && mm) ? mm->start_stack : 0);
+ seq_put_decimal_ull(m, " ", esp);
+ seq_put_decimal_ull(m, " ", eip);
/* The signal information here is obsolete.
* It must be decimal for Linux 2.0 compatibility.
* Use /proc/#/status for real-time signals.
*/
- seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL);
- seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL);
- seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL);
- seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, " ", task->pending.signal.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, " ", task->blocked.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, " ", sigign.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, " ", sigcatch.sig[0] & 0x7fffffffUL);
/*
* We used to output the absolute kernel address, but that's an
@@ -546,31 +553,31 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
else
seq_puts(m, " 0");
- seq_put_decimal_ull(m, ' ', 0);
- seq_put_decimal_ull(m, ' ', 0);
- seq_put_decimal_ll(m, ' ', task->exit_signal);
- seq_put_decimal_ll(m, ' ', task_cpu(task));
- seq_put_decimal_ull(m, ' ', task->rt_priority);
- seq_put_decimal_ull(m, ' ', task->policy);
- seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task));
- seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime));
- seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime));
+ seq_put_decimal_ull(m, " ", 0);
+ seq_put_decimal_ull(m, " ", 0);
+ seq_put_decimal_ll(m, " ", task->exit_signal);
+ seq_put_decimal_ll(m, " ", task_cpu(task));
+ seq_put_decimal_ull(m, " ", task->rt_priority);
+ seq_put_decimal_ull(m, " ", task->policy);
+ seq_put_decimal_ull(m, " ", delayacct_blkio_ticks(task));
+ seq_put_decimal_ull(m, " ", cputime_to_clock_t(gtime));
+ seq_put_decimal_ll(m, " ", cputime_to_clock_t(cgtime));
if (mm && permitted) {
- seq_put_decimal_ull(m, ' ', mm->start_data);
- seq_put_decimal_ull(m, ' ', mm->end_data);
- seq_put_decimal_ull(m, ' ', mm->start_brk);
- seq_put_decimal_ull(m, ' ', mm->arg_start);
- seq_put_decimal_ull(m, ' ', mm->arg_end);
- seq_put_decimal_ull(m, ' ', mm->env_start);
- seq_put_decimal_ull(m, ' ', mm->env_end);
+ seq_put_decimal_ull(m, " ", mm->start_data);
+ seq_put_decimal_ull(m, " ", mm->end_data);
+ seq_put_decimal_ull(m, " ", mm->start_brk);
+ seq_put_decimal_ull(m, " ", mm->arg_start);
+ seq_put_decimal_ull(m, " ", mm->arg_end);
+ seq_put_decimal_ull(m, " ", mm->env_start);
+ seq_put_decimal_ull(m, " ", mm->env_end);
} else
- seq_printf(m, " 0 0 0 0 0 0 0");
+ seq_puts(m, " 0 0 0 0 0 0 0");
if (permitted)
- seq_put_decimal_ll(m, ' ', task->exit_code);
+ seq_put_decimal_ll(m, " ", task->exit_code);
else
- seq_put_decimal_ll(m, ' ', 0);
+ seq_puts(m, " 0");
seq_putc(m, '\n');
if (mm)
@@ -606,13 +613,13 @@ int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
* seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
* size, resident, shared, text, data);
*/
- seq_put_decimal_ull(m, 0, size);
- seq_put_decimal_ull(m, ' ', resident);
- seq_put_decimal_ull(m, ' ', shared);
- seq_put_decimal_ull(m, ' ', text);
- seq_put_decimal_ull(m, ' ', 0);
- seq_put_decimal_ull(m, ' ', data);
- seq_put_decimal_ull(m, ' ', 0);
+ seq_put_decimal_ull(m, "", size);
+ seq_put_decimal_ull(m, " ", resident);
+ seq_put_decimal_ull(m, " ", shared);
+ seq_put_decimal_ull(m, " ", text);
+ seq_put_decimal_ull(m, " ", 0);
+ seq_put_decimal_ull(m, " ", data);
+ seq_put_decimal_ull(m, " ", 0);
seq_putc(m, '\n');
return 0;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index ae5350d61b0a..c7402cb76f11 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -233,12 +233,12 @@ static ssize_t proc_pid_cmdline_read(struct file *file, char __user *buf,
goto out_mmput;
}
- down_read(&mm->mmap_sem);
+ spin_lock(&mm->arg_lock);
arg_start = mm->arg_start;
arg_end = mm->arg_end;
env_start = mm->env_start;
env_end = mm->env_end;
- up_read(&mm->mmap_sem);
+ spin_unlock(&mm->arg_lock);
BUG_ON(arg_start > arg_end);
BUG_ON(env_start > env_end);
@@ -888,7 +888,7 @@ static ssize_t mem_rw(struct file *file, char __user *buf,
flags |= FOLL_WRITE;
while (count > 0) {
- int this_len = min_t(int, count, PAGE_SIZE);
+ size_t this_len = min_t(size_t, count, PAGE_SIZE);
if (write && copy_from_user(page, buf, this_len)) {
copied = -EFAULT;
@@ -990,10 +990,10 @@ static ssize_t environ_read(struct file *file, char __user *buf,
if (!atomic_inc_not_zero(&mm->mm_users))
goto free;
- down_read(&mm->mmap_sem);
+ spin_lock(&mm->arg_lock);
env_start = mm->env_start;
env_end = mm->env_end;
- up_read(&mm->mmap_sem);
+ spin_unlock(&mm->arg_lock);
while (count > 0) {
size_t this_len, max_len;
@@ -2674,6 +2674,13 @@ out:
}
#ifdef CONFIG_SECURITY
+static int proc_pid_attr_open(struct inode *inode, struct file *file)
+{
+ file->private_data = NULL;
+ __mem_open(inode, file, PTRACE_MODE_READ_FSCREDS);
+ return 0;
+}
+
static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
@@ -2703,6 +2710,10 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
ssize_t length;
struct task_struct *task = get_proc_task(inode);
+ /* A task may only write when it was the opener. */
+ if (file->private_data != current->mm)
+ return -EPERM;
+
length = -ESRCH;
if (!task)
goto out_no_task;
@@ -2741,9 +2752,11 @@ out_no_task:
}
static const struct file_operations proc_pid_attr_operations = {
+ .open = proc_pid_attr_open,
.read = proc_pid_attr_read,
.write = proc_pid_attr_write,
.llseek = generic_file_llseek,
+ .release = mem_release,
};
static const struct pid_entry attr_dir_stuff[] = {
@@ -3189,6 +3202,15 @@ static const struct file_operations proc_tgid_base_operations = {
.llseek = default_llseek,
};
+struct pid *tgid_pidfd_to_pid(const struct file *file)
+{
+ if (!d_is_dir(file->f_path.dentry) ||
+ (file->f_op != &proc_tgid_base_operations))
+ return ERR_PTR(-EBADF);
+
+ return proc_pid(file_inode(file));
+}
+
static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
return proc_pident_lookup(dir, dentry,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index bd95b9fdebb0..82140dbc03b7 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -415,7 +415,7 @@ const struct inode_operations proc_link_inode_operations = {
struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
{
- struct inode *inode = new_inode_pseudo(sb);
+ struct inode *inode = new_inode(sb);
if (inode) {
inode->i_ino = de->low_ino;
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 21f198aa0961..107db4f559e0 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -507,23 +507,15 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
return -EFAULT;
} else {
if (kern_addr_valid(start)) {
- unsigned long n;
-
/*
* Using bounce buffer to bypass the
* hardened user copy kernel text checks.
*/
- memcpy(buf, (char *) start, tsz);
- n = copy_to_user(buffer, buf, tsz);
- /*
- * We cannot distinguish between fault on source
- * and fault on destination. When this happens
- * we clear too and hope it will trigger the
- * EFAULT again.
- */
- if (n) {
- if (clear_user(buffer + tsz - n,
- n))
+ if (probe_kernel_read(buf, (void *) start, tsz)) {
+ if (clear_user(buffer, tsz))
+ return -EFAULT;
+ } else {
+ if (copy_to_user(buffer, buf, tsz))
return -EFAULT;
}
} else {
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 5e5c443591ea..83720460c5bc 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -29,10 +29,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
unsigned long committed;
long cached;
long available;
- unsigned long pagecache;
- unsigned long wmark_low = 0;
unsigned long pages[NR_LRU_LISTS];
- struct zone *zone;
int lru;
/*
@@ -51,40 +48,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
pages[lru] = global_page_state(NR_LRU_BASE + lru);
- for_each_zone(zone)
- wmark_low += zone->watermark[WMARK_LOW];
-
- /*
- * Estimate the amount of memory available for userspace allocations,
- * without causing swapping.
- */
- available = i.freeram - totalreserve_pages;
-
- /*
- * Not all the page cache can be freed, otherwise the system will
- * start swapping. Assume at least half of the page cache, or the
- * low watermark worth of cache, needs to stay.
- */
- pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE];
- pagecache -= min(pagecache / 2, wmark_low);
- available += pagecache;
-
- /*
- * Part of the reclaimable slab consists of items that are in use,
- * and cannot be freed. Cap this estimate at the low watermark.
- */
- available += global_page_state(NR_SLAB_RECLAIMABLE) -
- min(global_page_state(NR_SLAB_RECLAIMABLE) / 2, wmark_low);
-
- /*
- * Part of the kernel memory, which can be released under memory
- * pressure.
- */
- available += global_page_state(NR_INDIRECTLY_RECLAIMABLE_BYTES) >>
- PAGE_SHIFT;
-
- if (available < 0)
- available = 0;
+ available = si_mem_available();
/*
* Tagged format, for easy grepping and expansion.
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 1b0ea4a5d89e..b46274600f37 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -28,6 +28,9 @@ static const struct proc_ns_operations *ns_entries[] = {
&userns_operations,
#endif
&mntns_operations,
+#ifdef CONFIG_CGROUPS
+ &cgroupns_operations,
+#endif
};
static const char *proc_ns_follow_link(struct dentry *dentry, void **cookie)
diff --git a/fs/proc/self.c b/fs/proc/self.c
index 113b8d061fc0..dffbe533d53f 100644
--- a/fs/proc/self.c
+++ b/fs/proc/self.c
@@ -24,6 +24,13 @@ static const char *proc_self_follow_link(struct dentry *dentry, void **cookie)
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);
/* 11 for max length of signed int in decimal + NULL term */
@@ -51,7 +58,7 @@ int proc_setup_self(struct super_block *s)
mutex_lock(&root_inode->i_mutex);
self = d_alloc_name(s->s_root, "self");
if (self) {
- struct inode *inode = new_inode_pseudo(s);
+ struct inode *inode = new_inode(s);
if (inode) {
inode->i_ino = self_inum;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 510413eb25b8..0fd3f81fe51f 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -117,17 +117,16 @@ static int show_stat(struct seq_file *p, void *v)
}
sum += arch_irq_stat();
- seq_puts(p, "cpu ");
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
+ seq_put_decimal_ull(p, "cpu ", cputime64_to_clock_t(user));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(nice));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(system));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(idle));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(iowait));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(irq));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(softirq));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(steal));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest_nice));
seq_putc(p, '\n');
for_each_online_cpu(i) {
@@ -143,23 +142,23 @@ static int show_stat(struct seq_file *p, void *v)
guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
seq_printf(p, "cpu%d", i);
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
- seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(user));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(nice));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(system));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(idle));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(iowait));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(irq));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(softirq));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(steal));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest));
+ seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest_nice));
seq_putc(p, '\n');
}
- seq_printf(p, "intr %llu", (unsigned long long)sum);
+ seq_put_decimal_ull(p, "intr ", (unsigned long long)sum);
/* sum again ? it could be updated? */
for_each_irq_nr(j)
- seq_put_decimal_ull(p, ' ', kstat_irqs_usr(j));
+ seq_put_decimal_ull(p, " ", kstat_irqs_usr(j));
seq_printf(p,
"\nctxt %llu\n"
@@ -173,10 +172,10 @@ static int show_stat(struct seq_file *p, void *v)
nr_running(),
nr_iowait());
- seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
+ seq_put_decimal_ull(p, "softirq ", (unsigned long long)sum_softirq);
for (i = 0; i < NR_SOFTIRQS; i++)
- seq_put_decimal_ull(p, ' ', per_softirq_sums[i]);
+ seq_put_decimal_ull(p, " ", per_softirq_sums[i]);
seq_putc(p, '\n');
return 0;
diff --git a/fs/proc/thread_self.c b/fs/proc/thread_self.c
index 947b0f4fd0a1..4b186aac3011 100644
--- a/fs/proc/thread_self.c
+++ b/fs/proc/thread_self.c
@@ -52,7 +52,7 @@ int proc_setup_thread_self(struct super_block *s)
mutex_lock(&root_inode->i_mutex);
thread_self = d_alloc_name(s->s_root, "thread-self");
if (thread_self) {
- struct inode *inode = new_inode_pseudo(s);
+ struct inode *inode = new_inode(s);
if (inode) {
inode->i_ino = thread_self_inum;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 08143139b65a..785d05e3358c 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -105,14 +105,19 @@ static ssize_t read_from_oldmem(char *buf, size_t count,
nr_bytes = count;
/* If pfn is not ram, return zeros for sparse dump files */
- if (pfn_is_ram(pfn) == 0)
- memset(buf, 0, nr_bytes);
- else {
+ if (pfn_is_ram(pfn) == 0) {
+ tmp = 0;
+ if (!userbuf)
+ memset(buf, 0, nr_bytes);
+ else if (clear_user(buf, nr_bytes))
+ tmp = -EFAULT;
+ } else {
tmp = copy_oldmem_page(pfn, buf, nr_bytes,
offset, userbuf);
- if (tmp < 0)
- return tmp;
}
+ if (tmp < 0)
+ return tmp;
+
*ppos += nr_bytes;
count -= nr_bytes;
buf += nr_bytes;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-22 15:40:36 +0000