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-rw-r--r--fs/proc/array.c140
1 files changed, 88 insertions, 52 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 5efaf3708ec6..49283b8103c7 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>
@@ -68,7 +69,6 @@
#include <linux/sched/cputime.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
-#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
@@ -87,38 +87,33 @@
#include <linux/pid_namespace.h>
#include <linux/prctl.h>
#include <linux/ptrace.h>
-#include <linux/tracehook.h>
#include <linux/string_helpers.h>
#include <linux/user_namespace.h>
#include <linux/fs_struct.h>
+#include <linux/kthread.h>
-#include <asm/pgtable.h>
#include <asm/processor.h>
#include "internal.h"
void proc_task_name(struct seq_file *m, struct task_struct *p, bool escape)
{
- char *buf;
- size_t size;
char tcomm[64];
- int ret;
+ /*
+ * Test before PF_KTHREAD because all workqueue worker threads are
+ * kernel threads.
+ */
if (p->flags & PF_WQ_WORKER)
wq_worker_comm(tcomm, sizeof(tcomm), p);
+ else if (p->flags & PF_KTHREAD)
+ get_kthread_comm(tcomm, sizeof(tcomm), p);
else
__get_task_comm(tcomm, sizeof(tcomm), p);
- size = seq_get_buf(m, &buf);
- if (escape) {
- ret = string_escape_str(tcomm, buf, size,
- ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
- if (ret >= size)
- ret = -1;
- } else {
- ret = strscpy(buf, tcomm, size);
- }
-
- seq_commit(m, ret);
+ if (escape)
+ seq_escape_str(m, tcomm, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+ else
+ seq_printf(m, "%.64s", tcomm);
}
/*
@@ -248,8 +243,8 @@ void render_sigset_t(struct seq_file *m, const char *header,
seq_putc(m, '\n');
}
-static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
- sigset_t *catch)
+static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *sigign,
+ sigset_t *sigcatch)
{
struct k_sigaction *k;
int i;
@@ -257,9 +252,9 @@ static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
k = p->sighand->action;
for (i = 1; i <= _NSIG; ++i, ++k) {
if (k->sa.sa_handler == SIG_IGN)
- sigaddset(ign, i);
+ sigaddset(sigign, i);
else if (k->sa.sa_handler != SIG_DFL)
- sigaddset(catch, i);
+ sigaddset(sigcatch, i);
}
}
@@ -284,7 +279,7 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
collect_sigign_sigcatch(p, &ignored, &caught);
num_threads = get_nr_threads(p);
rcu_read_lock(); /* FIXME: is this correct? */
- qsize = atomic_read(&__task_cred(p)->user->sigpending);
+ qsize = get_rlimit_value(task_ucounts(p), UCOUNT_RLIMIT_SIGPENDING);
rcu_read_unlock();
qlim = task_rlimit(p, RLIMIT_SIGPENDING);
unlock_task_sighand(p, &flags);
@@ -342,6 +337,10 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
seq_put_decimal_ull(m, "NoNewPrivs:\t", task_no_new_privs(p));
#ifdef CONFIG_SECCOMP
seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode);
+#ifdef CONFIG_SECCOMP_FILTER
+ seq_put_decimal_ull(m, "\nSeccomp_filters:\t",
+ atomic_read(&p->seccomp.filter_count));
+#endif
#endif
seq_puts(m, "\nSpeculation_Store_Bypass:\t");
switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_STORE_BYPASS)) {
@@ -367,6 +366,34 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
seq_puts(m, "vulnerable");
break;
}
+
+ seq_puts(m, "\nSpeculationIndirectBranch:\t");
+ switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_INDIRECT_BRANCH)) {
+ case -EINVAL:
+ seq_puts(m, "unsupported");
+ break;
+ case PR_SPEC_NOT_AFFECTED:
+ seq_puts(m, "not affected");
+ break;
+ case PR_SPEC_PRCTL | PR_SPEC_FORCE_DISABLE:
+ seq_puts(m, "conditional force disabled");
+ break;
+ case PR_SPEC_PRCTL | PR_SPEC_DISABLE:
+ seq_puts(m, "conditional disabled");
+ break;
+ case PR_SPEC_PRCTL | PR_SPEC_ENABLE:
+ seq_puts(m, "conditional enabled");
+ break;
+ case PR_SPEC_ENABLE:
+ seq_puts(m, "always enabled");
+ break;
+ case PR_SPEC_DISABLE:
+ seq_puts(m, "always disabled");
+ break;
+ default:
+ seq_puts(m, "unknown");
+ break;
+ }
seq_putc(m, '\n');
}
@@ -381,14 +408,14 @@ 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)
+static inline void task_core_dumping(struct seq_file *m, struct task_struct *task)
{
- seq_put_decimal_ull(m, "CoreDumping:\t", !!mm->core_state);
+ seq_put_decimal_ull(m, "CoreDumping:\t", !!task->signal->core_state);
seq_putc(m, '\n');
}
@@ -414,7 +441,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
if (mm) {
task_mem(m, mm);
- task_core_dumping(m, mm);
+ task_core_dumping(m, task);
task_thp_status(m, mm);
mmput(mm);
}
@@ -446,6 +473,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
u64 cgtime, gtime;
unsigned long rsslim = 0;
unsigned long flags;
+ int exit_code = task->exit_code;
state = *get_task_state(task);
vsize = eip = esp = 0;
@@ -509,6 +537,9 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
maj_flt += sig->maj_flt;
thread_group_cputime_adjusted(task, &utime, &stime);
gtime += sig->gtime;
+
+ if (sig->flags & (SIGNAL_GROUP_EXIT | SIGNAL_STOP_STOPPED))
+ exit_code = sig->group_exit_code;
}
sid = task_session_nr_ns(task, ns);
@@ -519,7 +550,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
}
if (permitted && (!whole || num_threads < 2))
- wchan = get_wchan(task);
+ wchan = !task_is_running(task);
if (!whole) {
min_flt = task->min_flt;
maj_flt = task->maj_flt;
@@ -532,8 +563,9 @@ 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, " (");
@@ -583,10 +615,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
*
* This works with older implementations of procps as well.
*/
- if (wchan)
- seq_puts(m, " 1");
- else
- seq_puts(m, " 0");
+ seq_put_decimal_ull(m, " ", wchan);
seq_put_decimal_ull(m, " ", 0);
seq_put_decimal_ull(m, " ", 0);
@@ -610,7 +639,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
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, " ", exit_code);
else
seq_puts(m, " 0");
@@ -635,28 +664,35 @@ int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
- unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0;
struct mm_struct *mm = get_task_mm(task);
if (mm) {
+ unsigned long size;
+ unsigned long resident = 0;
+ unsigned long shared = 0;
+ unsigned long text = 0;
+ unsigned long data = 0;
+
size = task_statm(mm, &shared, &text, &data, &resident);
mmput(mm);
- }
- /*
- * For quick read, open code by putting numbers directly
- * expected format is
- * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
- * size, resident, shared, text, data);
- */
- 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');
+ /*
+ * For quick read, open code by putting numbers directly
+ * expected format is
+ * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
+ * size, resident, shared, text, data);
+ */
+ 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');
+ } else {
+ seq_write(m, "0 0 0 0 0 0 0\n", 14);
+ }
return 0;
}
@@ -721,7 +757,7 @@ static int children_seq_show(struct seq_file *seq, void *v)
{
struct inode *inode = file_inode(seq->file);
- seq_printf(seq, "%d ", pid_nr_ns(v, proc_pid_ns(inode)));
+ seq_printf(seq, "%d ", pid_nr_ns(v, proc_pid_ns(inode->i_sb)));
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.