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-rw-r--r--fs/proc/array.c9
-rw-r--r--fs/proc/base.c4
-rw-r--r--fs/proc/proc_net.c19
-rw-r--r--fs/proc/proc_sysctl.c9
-rw-r--r--fs/proc/task_mmu.c13
-rw-r--r--fs/proc/vmcore.c30
6 files changed, 56 insertions, 28 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index ff869a66b34e..fd8b0c12b2cb 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -92,6 +92,7 @@
#include <linux/string_helpers.h>
#include <linux/user_namespace.h>
#include <linux/fs_struct.h>
+#include <linux/kthread.h>
#include <asm/processor.h>
#include "internal.h"
@@ -102,6 +103,8 @@ void proc_task_name(struct seq_file *m, struct task_struct *p, bool escape)
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);
@@ -468,6 +471,7 @@ 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;
@@ -531,6 +535,9 @@ 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);
@@ -630,7 +637,7 @@ 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");
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 13eda8de2998..d654ce7150fd 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -670,10 +670,10 @@ static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
/************************************************************************/
/* permission checks */
-static int proc_fd_access_allowed(struct inode *inode)
+static bool proc_fd_access_allowed(struct inode *inode)
{
struct task_struct *task;
- int allowed = 0;
+ bool allowed = false;
/* Allow access to a task's file descriptors if it is us or we
* may use ptrace attach to the process and find out that
* information.
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 15c2e55d2ed2..39b823ab2564 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -61,15 +61,27 @@ static int seq_open_net(struct inode *inode, struct file *file)
}
#ifdef CONFIG_NET_NS
p->net = net;
+ netns_tracker_alloc(net, &p->ns_tracker, GFP_KERNEL);
#endif
return 0;
}
+static void seq_file_net_put_net(struct seq_file *seq)
+{
+#ifdef CONFIG_NET_NS
+ struct seq_net_private *priv = seq->private;
+
+ put_net_track(priv->net, &priv->ns_tracker);
+#else
+ put_net(&init_net);
+#endif
+}
+
static int seq_release_net(struct inode *ino, struct file *f)
{
struct seq_file *seq = f->private_data;
- put_net(seq_file_net(seq));
+ seq_file_net_put_net(seq);
seq_release_private(ino, f);
return 0;
}
@@ -87,7 +99,8 @@ int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux)
#ifdef CONFIG_NET_NS
struct seq_net_private *p = priv_data;
- p->net = get_net(current->nsproxy->net_ns);
+ p->net = get_net_track(current->nsproxy->net_ns, &p->ns_tracker,
+ GFP_KERNEL);
#endif
return 0;
}
@@ -97,7 +110,7 @@ void bpf_iter_fini_seq_net(void *priv_data)
#ifdef CONFIG_NET_NS
struct seq_net_private *p = priv_data;
- put_net(p->net);
+ put_net_track(p->net, &p->ns_tracker);
#endif
}
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 5d66faecd4ef..389e1e42e7d9 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -163,7 +163,7 @@ static int insert_entry(struct ctl_table_header *head, struct ctl_table *entry)
else {
pr_err("sysctl duplicate entry: ");
sysctl_print_dir(head->parent);
- pr_cont("/%s\n", entry->procname);
+ pr_cont("%s\n", entry->procname);
return -EEXIST;
}
}
@@ -1020,8 +1020,8 @@ failed:
if (IS_ERR(subdir)) {
pr_err("sysctl could not get directory: ");
sysctl_print_dir(dir);
- pr_cont("/%*.*s %ld\n",
- namelen, namelen, name, PTR_ERR(subdir));
+ pr_cont("%*.*s %ld\n", namelen, namelen, name,
+ PTR_ERR(subdir));
}
drop_sysctl_table(&dir->header);
if (new)
@@ -1053,7 +1053,6 @@ static int sysctl_follow_link(struct ctl_table_header **phead,
struct ctl_dir *dir;
int ret;
- ret = 0;
spin_lock(&sysctl_lock);
root = (*pentry)->data;
set = lookup_header_set(root);
@@ -1626,7 +1625,7 @@ static void put_links(struct ctl_table_header *header)
else {
pr_err("sysctl link missing during unregister: ");
sysctl_print_dir(parent);
- pr_cont("/%s\n", name);
+ pr_cont("%s\n", name);
}
}
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index ad667dbc96f5..18f8c3acbb85 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/pagewalk.h>
#include <linux/vmacache.h>
+#include <linux/mm_inline.h>
#include <linux/hugetlb.h>
#include <linux/huge_mm.h>
#include <linux/mount.h>
@@ -308,6 +309,8 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
name = arch_vma_name(vma);
if (!name) {
+ const char *anon_name;
+
if (!mm) {
name = "[vdso]";
goto done;
@@ -319,8 +322,16 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
goto done;
}
- if (is_stack(vma))
+ if (is_stack(vma)) {
name = "[stack]";
+ goto done;
+ }
+
+ anon_name = vma_anon_name(vma);
+ if (anon_name) {
+ seq_pad(m, ' ');
+ seq_printf(m, "[anon:%s]", anon_name);
+ }
}
done:
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 30a3b66f475a..702754dd1daf 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -65,8 +65,6 @@ static size_t vmcoredd_orig_sz;
static DECLARE_RWSEM(vmcore_cb_rwsem);
/* List of registered vmcore callbacks. */
static LIST_HEAD(vmcore_cb_list);
-/* Whether we had a surprise unregistration of a callback. */
-static bool vmcore_cb_unstable;
/* Whether the vmcore has been opened once. */
static bool vmcore_opened;
@@ -94,10 +92,8 @@ void unregister_vmcore_cb(struct vmcore_cb *cb)
* very unusual (e.g., forced driver removal), but we cannot stop
* unregistering.
*/
- if (vmcore_opened) {
+ if (vmcore_opened)
pr_warn_once("Unexpected vmcore callback unregistration\n");
- vmcore_cb_unstable = true;
- }
up_write(&vmcore_cb_rwsem);
}
EXPORT_SYMBOL_GPL(unregister_vmcore_cb);
@@ -108,8 +104,6 @@ static bool pfn_is_ram(unsigned long pfn)
bool ret = true;
lockdep_assert_held_read(&vmcore_cb_rwsem);
- if (unlikely(vmcore_cb_unstable))
- return false;
list_for_each_entry(cb, &vmcore_cb_list, next) {
if (unlikely(!cb->pfn_is_ram))
@@ -154,9 +148,13 @@ 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))
- memset(buf, 0, nr_bytes);
- else {
+ if (!pfn_is_ram(pfn)) {
+ tmp = 0;
+ if (!userbuf)
+ memset(buf, 0, nr_bytes);
+ else if (clear_user(buf, nr_bytes))
+ tmp = -EFAULT;
+ } else {
if (encrypted)
tmp = copy_oldmem_page_encrypted(pfn, buf,
nr_bytes,
@@ -165,12 +163,12 @@ ssize_t read_from_oldmem(char *buf, size_t count,
else
tmp = copy_oldmem_page(pfn, buf, nr_bytes,
offset, userbuf);
-
- if (tmp < 0) {
- up_read(&vmcore_cb_rwsem);
- return tmp;
- }
}
+ if (tmp < 0) {
+ up_read(&vmcore_cb_rwsem);
+ return tmp;
+ }
+
*ppos += nr_bytes;
count -= nr_bytes;
buf += nr_bytes;
@@ -577,7 +575,7 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma,
* looping over all pages without a reason.
*/
down_read(&vmcore_cb_rwsem);
- if (!list_empty(&vmcore_cb_list) || vmcore_cb_unstable)
+ if (!list_empty(&vmcore_cb_list))
ret = remap_oldmem_pfn_checked(vma, from, pfn, size, prot);
else
ret = remap_oldmem_pfn_range(vma, from, pfn, size, prot);
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