aboutsummaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/Makefile1
-rw-r--r--kernel/acct.c4
-rw-r--r--kernel/bpf/offload.c12
-rw-r--r--kernel/configs.c9
-rw-r--r--kernel/debug/kdb/kdb_bp.c1
-rw-r--r--kernel/debug/kdb/kdb_bt.c8
-rw-r--r--kernel/debug/kdb/kdb_io.c9
-rw-r--r--kernel/debug/kdb/kdb_main.c31
-rw-r--r--kernel/debug/kdb/kdb_private.h2
-rw-r--r--kernel/events/core.c2
-rw-r--r--kernel/fork.c4
-rw-r--r--kernel/irq/proc.c42
-rw-r--r--kernel/kallsyms.c12
-rw-r--r--kernel/latencytop.c14
-rw-r--r--kernel/locking/lockdep_proc.c15
-rw-r--r--kernel/module.c34
-rw-r--r--kernel/pid.c90
-rw-r--r--kernel/printk/printk.c4
-rw-r--r--kernel/profile.c24
-rw-r--r--kernel/rcu/tree_exp.h1
-rw-r--r--kernel/sched/psi.c48
-rw-r--r--kernel/signal.c2
-rw-r--r--kernel/sys.c25
-rw-r--r--kernel/sysctl-test.c4
-rw-r--r--kernel/time/itimer.c18
-rw-r--r--kernel/time/time.c58
-rw-r--r--kernel/tsacct.c9
27 files changed, 273 insertions, 210 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index f2cc0d118a0b..4cb4130ced32 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -27,6 +27,7 @@ KCOV_INSTRUMENT_softirq.o := n
# and produce insane amounts of uninteresting coverage.
KCOV_INSTRUMENT_module.o := n
KCOV_INSTRUMENT_extable.o := n
+KCOV_INSTRUMENT_stacktrace.o := n
# Don't self-instrument.
KCOV_INSTRUMENT_kcov.o := n
KASAN_SANITIZE_kcov.o := n
diff --git a/kernel/acct.c b/kernel/acct.c
index 81f9831a7859..11ff4a596d6b 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -416,6 +416,7 @@ static void fill_ac(acct_t *ac)
{
struct pacct_struct *pacct = &current->signal->pacct;
u64 elapsed, run_time;
+ time64_t btime;
struct tty_struct *tty;
/*
@@ -448,7 +449,8 @@ static void fill_ac(acct_t *ac)
}
#endif
do_div(elapsed, AHZ);
- ac->ac_btime = get_seconds() - elapsed;
+ btime = ktime_get_real_seconds() - elapsed;
+ ac->ac_btime = clamp_t(time64_t, btime, 0, U32_MAX);
#if ACCT_VERSION==2
ac->ac_ahz = AHZ;
#endif
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 5b9da0954a27..2c5dc6541ece 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -302,14 +302,14 @@ int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
struct inode *ns_inode;
struct path ns_path;
char __user *uinsns;
- void *res;
+ int res;
u32 ulen;
res = ns_get_path_cb(&ns_path, bpf_prog_offload_info_fill_ns, &args);
- if (IS_ERR(res)) {
+ if (res) {
if (!info->ifindex)
return -ENODEV;
- return PTR_ERR(res);
+ return res;
}
down_read(&bpf_devs_lock);
@@ -526,13 +526,13 @@ int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map)
};
struct inode *ns_inode;
struct path ns_path;
- void *res;
+ int res;
res = ns_get_path_cb(&ns_path, bpf_map_offload_info_fill_ns, &args);
- if (IS_ERR(res)) {
+ if (res) {
if (!info->ifindex)
return -ENODEV;
- return PTR_ERR(res);
+ return res;
}
ns_inode = ns_path.dentry->d_inode;
diff --git a/kernel/configs.c b/kernel/configs.c
index c09ea4c995e1..a28c79c5f713 100644
--- a/kernel/configs.c
+++ b/kernel/configs.c
@@ -47,10 +47,9 @@ ikconfig_read_current(struct file *file, char __user *buf,
&kernel_config_data);
}
-static const struct file_operations ikconfig_file_ops = {
- .owner = THIS_MODULE,
- .read = ikconfig_read_current,
- .llseek = default_llseek,
+static const struct proc_ops config_gz_proc_ops = {
+ .proc_read = ikconfig_read_current,
+ .proc_lseek = default_llseek,
};
static int __init ikconfig_init(void)
@@ -59,7 +58,7 @@ static int __init ikconfig_init(void)
/* create the current config file */
entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
- &ikconfig_file_ops);
+ &config_gz_proc_ops);
if (!entry)
return -ENOMEM;
diff --git a/kernel/debug/kdb/kdb_bp.c b/kernel/debug/kdb/kdb_bp.c
index 62c301ad0773..d7ebb2c79cb8 100644
--- a/kernel/debug/kdb/kdb_bp.c
+++ b/kernel/debug/kdb/kdb_bp.c
@@ -412,7 +412,6 @@ static int kdb_bc(int argc, const char **argv)
* assume that the breakpoint number is desired.
*/
if (addr < KDB_MAXBPT) {
- bp = &kdb_breakpoints[addr];
lowbp = highbp = addr;
highbp++;
} else {
diff --git a/kernel/debug/kdb/kdb_bt.c b/kernel/debug/kdb/kdb_bt.c
index 4af48ac53625..3de0cc780c16 100644
--- a/kernel/debug/kdb/kdb_bt.c
+++ b/kernel/debug/kdb/kdb_bt.c
@@ -119,7 +119,6 @@ kdb_bt_cpu(unsigned long cpu)
return;
}
- kdb_set_current_task(kdb_tsk);
kdb_bt1(kdb_tsk, ~0UL, false);
}
@@ -166,10 +165,8 @@ kdb_bt(int argc, const char **argv)
if (diag)
return diag;
p = find_task_by_pid_ns(pid, &init_pid_ns);
- if (p) {
- kdb_set_current_task(p);
+ if (p)
return kdb_bt1(p, ~0UL, false);
- }
kdb_printf("No process with pid == %ld found\n", pid);
return 0;
} else if (strcmp(argv[0], "btt") == 0) {
@@ -178,11 +175,9 @@ kdb_bt(int argc, const char **argv)
diag = kdbgetularg((char *)argv[1], &addr);
if (diag)
return diag;
- kdb_set_current_task((struct task_struct *)addr);
return kdb_bt1((struct task_struct *)addr, ~0UL, false);
} else if (strcmp(argv[0], "btc") == 0) {
unsigned long cpu = ~0;
- struct task_struct *save_current_task = kdb_current_task;
if (argc > 1)
return KDB_ARGCOUNT;
if (argc == 1) {
@@ -204,7 +199,6 @@ kdb_bt(int argc, const char **argv)
kdb_bt_cpu(cpu);
touch_nmi_watchdog();
}
- kdb_set_current_task(save_current_task);
}
return 0;
} else {
diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 8bcdded5d61f..924bc9298a42 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -553,7 +553,7 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap)
int this_cpu, old_cpu;
char *cp, *cp2, *cphold = NULL, replaced_byte = ' ';
char *moreprompt = "more> ";
- struct console *c = console_drivers;
+ struct console *c;
unsigned long uninitialized_var(flags);
/* Serialize kdb_printf if multiple cpus try to write at once.
@@ -698,10 +698,9 @@ kdb_printit:
cp2++;
}
}
- while (c) {
+ for_each_console(c) {
c->write(c, cp, retlen - (cp - kdb_buffer));
touch_nmi_watchdog();
- c = c->next;
}
}
if (logging) {
@@ -752,7 +751,6 @@ kdb_printit:
moreprompt = "more> ";
kdb_input_flush();
- c = console_drivers;
if (dbg_io_ops && !dbg_io_ops->is_console) {
len = strlen(moreprompt);
@@ -762,10 +760,9 @@ kdb_printit:
cp++;
}
}
- while (c) {
+ for_each_console(c) {
c->write(c, moreprompt, strlen(moreprompt));
touch_nmi_watchdog();
- c = c->next;
}
if (logging)
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 4567fe998c30..b22292b649c4 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -73,7 +73,6 @@ int kdb_nextline = 1;
int kdb_state; /* General KDB state */
struct task_struct *kdb_current_task;
-EXPORT_SYMBOL(kdb_current_task);
struct pt_regs *kdb_current_regs;
const char *kdb_diemsg;
@@ -544,9 +543,8 @@ int kdbgetaddrarg(int argc, const char **argv, int *nextarg,
if (diag)
return diag;
} else if (symname[0] == '%') {
- diag = kdb_check_regs();
- if (diag)
- return diag;
+ if (kdb_check_regs())
+ return 0;
/* Implement register values with % at a later time as it is
* arch optional.
*/
@@ -1139,7 +1137,7 @@ static void kdb_dumpregs(struct pt_regs *regs)
console_loglevel = old_lvl;
}
-void kdb_set_current_task(struct task_struct *p)
+static void kdb_set_current_task(struct task_struct *p)
{
kdb_current_task = p;
@@ -1837,8 +1835,7 @@ static int kdb_go(int argc, const char **argv)
*/
static int kdb_rd(int argc, const char **argv)
{
- int len = kdb_check_regs();
-#if DBG_MAX_REG_NUM > 0
+ int len = 0;
int i;
char *rname;
int rsize;
@@ -1847,8 +1844,14 @@ static int kdb_rd(int argc, const char **argv)
u16 reg16;
u8 reg8;
- if (len)
- return len;
+ if (kdb_check_regs())
+ return 0;
+
+ /* Fallback to Linux showregs() if we don't have DBG_MAX_REG_NUM */
+ if (DBG_MAX_REG_NUM <= 0) {
+ kdb_dumpregs(kdb_current_regs);
+ return 0;
+ }
for (i = 0; i < DBG_MAX_REG_NUM; i++) {
rsize = dbg_reg_def[i].size * 2;
@@ -1890,12 +1893,7 @@ static int kdb_rd(int argc, const char **argv)
}
}
kdb_printf("\n");
-#else
- if (len)
- return len;
- kdb_dumpregs(kdb_current_regs);
-#endif
return 0;
}
@@ -1929,9 +1927,8 @@ static int kdb_rm(int argc, const char **argv)
if (diag)
return diag;
- diag = kdb_check_regs();
- if (diag)
- return diag;
+ if (kdb_check_regs())
+ return 0;
diag = KDB_BADREG;
for (i = 0; i < DBG_MAX_REG_NUM; i++) {
diff --git a/kernel/debug/kdb/kdb_private.h b/kernel/debug/kdb/kdb_private.h
index 55d052061ef9..2e296e4a234c 100644
--- a/kernel/debug/kdb/kdb_private.h
+++ b/kernel/debug/kdb/kdb_private.h
@@ -240,8 +240,8 @@ extern void *debug_kmalloc(size_t size, gfp_t flags);
extern void debug_kfree(void *);
extern void debug_kusage(void);
-extern void kdb_set_current_task(struct task_struct *);
extern struct task_struct *kdb_current_task;
+extern struct pt_regs *kdb_current_regs;
#ifdef CONFIG_KDB_KEYBOARD
extern void kdb_kbd_cleanup_state(void);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2173c23c25b4..dc9c643bce94 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7495,7 +7495,7 @@ static void perf_fill_ns_link_info(struct perf_ns_link_info *ns_link_info,
{
struct path ns_path;
struct inode *ns_inode;
- void *error;
+ int error;
error = ns_get_path(&ns_path, task, ns_ops);
if (!error) {
diff --git a/kernel/fork.c b/kernel/fork.c
index ef82feb4bddc..60a1295f4384 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -692,7 +692,7 @@ void __mmdrop(struct mm_struct *mm)
WARN_ON_ONCE(mm == current->active_mm);
mm_free_pgd(mm);
destroy_context(mm);
- mmu_notifier_mm_destroy(mm);
+ mmu_notifier_subscriptions_destroy(mm);
check_mm(mm);
put_user_ns(mm->user_ns);
free_mm(mm);
@@ -1025,7 +1025,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
mm_init_aio(mm);
mm_init_owner(mm, p);
RCU_INIT_POINTER(mm->exe_file, NULL);
- mmu_notifier_mm_init(mm);
+ mmu_notifier_subscriptions_init(mm);
init_tlb_flush_pending(mm);
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
mm->pmd_huge_pte = NULL;
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index cfc4f088a0e7..9e5783d98033 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -176,20 +176,20 @@ static int irq_affinity_list_proc_open(struct inode *inode, struct file *file)
return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode));
}
-static const struct file_operations irq_affinity_proc_fops = {
- .open = irq_affinity_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = irq_affinity_proc_write,
+static const struct proc_ops irq_affinity_proc_ops = {
+ .proc_open = irq_affinity_proc_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = single_release,
+ .proc_write = irq_affinity_proc_write,
};
-static const struct file_operations irq_affinity_list_proc_fops = {
- .open = irq_affinity_list_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = irq_affinity_list_proc_write,
+static const struct proc_ops irq_affinity_list_proc_ops = {
+ .proc_open = irq_affinity_list_proc_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = single_release,
+ .proc_write = irq_affinity_list_proc_write,
};
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
@@ -246,12 +246,12 @@ static int default_affinity_open(struct inode *inode, struct file *file)
return single_open(file, default_affinity_show, PDE_DATA(inode));
}
-static const struct file_operations default_affinity_proc_fops = {
- .open = default_affinity_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = default_affinity_write,
+static const struct proc_ops default_affinity_proc_ops = {
+ .proc_open = default_affinity_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = single_release,
+ .proc_write = default_affinity_write,
};
static int irq_node_proc_show(struct seq_file *m, void *v)
@@ -342,7 +342,7 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
#ifdef CONFIG_SMP
/* create /proc/irq/<irq>/smp_affinity */
proc_create_data("smp_affinity", 0644, desc->dir,
- &irq_affinity_proc_fops, irqp);
+ &irq_affinity_proc_ops, irqp);
/* create /proc/irq/<irq>/affinity_hint */
proc_create_single_data("affinity_hint", 0444, desc->dir,
@@ -350,7 +350,7 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
/* create /proc/irq/<irq>/smp_affinity_list */
proc_create_data("smp_affinity_list", 0644, desc->dir,
- &irq_affinity_list_proc_fops, irqp);
+ &irq_affinity_list_proc_ops, irqp);
proc_create_single_data("node", 0444, desc->dir, irq_node_proc_show,
irqp);
@@ -401,7 +401,7 @@ static void register_default_affinity_proc(void)
{
#ifdef CONFIG_SMP
proc_create("irq/default_smp_affinity", 0644, NULL,
- &default_affinity_proc_fops);
+ &default_affinity_proc_ops);
#endif
}
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 136ce049c4ad..d812b90f4c86 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -698,16 +698,16 @@ const char *kdb_walk_kallsyms(loff_t *pos)
}
#endif /* CONFIG_KGDB_KDB */
-static const struct file_operations kallsyms_operations = {
- .open = kallsyms_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
+static const struct proc_ops kallsyms_proc_ops = {
+ .proc_open = kallsyms_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = seq_release_private,
};
static int __init kallsyms_init(void)
{
- proc_create("kallsyms", 0444, NULL, &kallsyms_operations);
+ proc_create("kallsyms", 0444, NULL, &kallsyms_proc_ops);
return 0;
}
device_initcall(kallsyms_init);
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index e3acead004e6..8d1c15832e55 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -255,17 +255,17 @@ static int lstats_open(struct inode *inode, struct file *filp)
return single_open(filp, lstats_show, NULL);
}
-static const struct file_operations lstats_fops = {
- .open = lstats_open,
- .read = seq_read,
- .write = lstats_write,
- .llseek = seq_lseek,
- .release = single_release,
+static const struct proc_ops lstats_proc_ops = {
+ .proc_open = lstats_open,
+ .proc_read = seq_read,
+ .proc_write = lstats_write,
+ .proc_lseek = seq_lseek,
+ .proc_release = single_release,
};
static int __init init_lstats_procfs(void)
{
- proc_create("latency_stats", 0644, NULL, &lstats_fops);
+ proc_create("latency_stats", 0644, NULL, &lstats_proc_ops);
return 0;
}
diff --git a/kernel/locking/lockdep_proc.c b/kernel/locking/lockdep_proc.c
index 9bb6d2497b04..231684cfc5ae 100644
--- a/kernel/locking/lockdep_proc.c
+++ b/kernel/locking/lockdep_proc.c
@@ -643,12 +643,12 @@ static int lock_stat_release(struct inode *inode, struct file *file)
return seq_release(inode, file);
}
-static const struct file_operations proc_lock_stat_operations = {
- .open = lock_stat_open,
- .write = lock_stat_write,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = lock_stat_release,
+static const struct proc_ops lock_stat_proc_ops = {
+ .proc_open = lock_stat_open,
+ .proc_write = lock_stat_write,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = lock_stat_release,
};
#endif /* CONFIG_LOCK_STAT */
@@ -660,8 +660,7 @@ static int __init lockdep_proc_init(void)
#endif
proc_create_single("lockdep_stats", S_IRUSR, NULL, lockdep_stats_show);
#ifdef CONFIG_LOCK_STAT
- proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL,
- &proc_lock_stat_operations);
+ proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL, &lock_stat_proc_ops);
#endif
return 0;
diff --git a/kernel/module.c b/kernel/module.c
index ac058a5ad1d1..33569a01d6e1 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -214,7 +214,8 @@ static struct module *mod_find(unsigned long addr)
{
struct module *mod;
- list_for_each_entry_rcu(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list,
+ lockdep_is_held(&module_mutex)) {
if (within_module(addr, mod))
return mod;
}
@@ -448,7 +449,8 @@ bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data))
return true;
- list_for_each_entry_rcu(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list,
+ lockdep_is_held(&module_mutex)) {
struct symsearch arr[] = {
{ mod->syms, mod->syms + mod->num_syms, mod->crcs,
NOT_GPL_ONLY, false },
@@ -616,7 +618,8 @@ static struct module *find_module_all(const char *name, size_t len,
module_assert_mutex_or_preempt();
- list_for_each_entry_rcu(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list,
+ lockdep_is_held(&module_mutex)) {
if (!even_unformed && mod->state == MODULE_STATE_UNFORMED)
continue;
if (strlen(mod->name) == len && !memcmp(mod->name, name, len))
@@ -1781,6 +1784,8 @@ static int module_add_modinfo_attrs(struct module *mod)
error_out:
if (i > 0)
module_remove_modinfo_attrs(mod, --i);
+ else
+ kfree(mod->modinfo_attrs);
return error;
}
@@ -2834,7 +2839,7 @@ static int module_sig_check(struct load_info *info, int flags)
reason = "Loading of module with unavailable key";
decide:
if (is_module_sig_enforced()) {
- pr_notice("%s is rejected\n", reason);
+ pr_notice("%s: %s is rejected\n", info->name, reason);
return -EKEYREJECTED;
}
@@ -3011,9 +3016,7 @@ static int setup_load_info(struct load_info *info, int flags)
/* Try to find a name early so we can log errors with a module name */
info->index.info = find_sec(info, ".modinfo");
- if (!info->index.info)
- info->name = "(missing .modinfo section)";
- else
+ if (info->index.info)
info->name = get_modinfo(info, "name");
/* Find internal symbols and strings. */
@@ -3028,14 +3031,15 @@ static int setup_load_info(struct load_info *info, int flags)
}
if (info->index.sym == 0) {
- pr_warn("%s: module has no symbols (stripped?)\n", info->name);
+ pr_warn("%s: module has no symbols (stripped?)\n",
+ info->name ?: "(missing .modinfo section or name field)");
return -ENOEXEC;
}
info->index.mod = find_sec(info, ".gnu.linkonce.this_module");
if (!info->index.mod) {
pr_warn("%s: No module found in object\n",
- info->name ?: "(missing .modinfo name field)");
+ info->name ?: "(missing .modinfo section or name field)");
return -ENOEXEC;
}
/* This is temporary: point mod into copy of data. */
@@ -4350,16 +4354,16 @@ static int modules_open(struct inode *inode, struct file *file)
return err;
}
-static const struct file_operations proc_modules_operations = {
- .open = modules_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
+static const struct proc_ops modules_proc_ops = {
+ .proc_open = modules_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = seq_release,
};
static int __init proc_modules_init(void)
{
- proc_create("modules", 0, NULL, &proc_modules_operations);
+ proc_create("modules", 0, NULL, &modules_proc_ops);
return 0;
}
module_init(proc_modules_init);
diff --git a/kernel/pid.c b/kernel/pid.c
index 2278e249141d..0f4ecb57214c 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -578,3 +578,93 @@ void __init pid_idr_init(void)
init_pid_ns.pid_cachep = KMEM_CACHE(pid,
SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
}
+
+static struct file *__pidfd_fget(struct task_struct *task, int fd)
+{
+ struct file *file;
+ int ret;
+
+ ret = mutex_lock_killable(&task->signal->cred_guard_mutex);
+ if (ret)
+ return ERR_PTR(ret);
+
+ if (ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS))
+ file = fget_task(task, fd);
+ else
+ file = ERR_PTR(-EPERM);
+
+ mutex_unlock(&task->signal->cred_guard_mutex);
+
+ return file ?: ERR_PTR(-EBADF);
+}
+
+static int pidfd_getfd(struct pid *pid, int fd)
+{
+ struct task_struct *task;
+ struct file *file;
+ int ret;
+
+ task = get_pid_task(pid, PIDTYPE_PID);
+ if (!task)
+ return -ESRCH;
+
+ file = __pidfd_fget(task, fd);
+ put_task_struct(task);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ret = security_file_receive(file);
+ if (ret) {
+ fput(file);
+ return ret;
+ }
+
+ ret = get_unused_fd_flags(O_CLOEXEC);
+ if (ret < 0)
+ fput(file);
+ else
+ fd_install(ret, file);
+
+ return ret;
+}
+
+/**
+ * sys_pidfd_getfd() - Get a file descriptor from another process
+ *
+ * @pidfd: the pidfd file descriptor of the process
+ * @fd: the file descriptor number to get
+ * @flags: flags on how to get the fd (reserved)
+ *
+ * This syscall gets a copy of a file descriptor from another process
+ * based on the pidfd, and file descriptor number. It requires that
+ * the calling process has the ability to ptrace the process represented
+ * by the pidfd. The process which is having its file descriptor copied
+ * is otherwise unaffected.
+ *
+ * Return: On success, a cloexec file descriptor is returned.
+ * On error, a negative errno number will be returned.
+ */
+SYSCALL_DEFINE3(pidfd_getfd, int, pidfd, int, fd,
+ unsigned int, flags)
+{
+ struct pid *pid;
+ struct fd f;
+ int ret;
+
+ /* flags is currently unused - make sure it's unset */
+ if (flags)
+ return -EINVAL;
+
+ f = fdget(pidfd);
+ if (!f.file)
+ return -EBADF;
+
+ pid = pidfd_pid(f.file);
+ if (IS_ERR(pid))
+ ret = PTR_ERR(pid);
+ else
+ ret = pidfd_getfd(pid, fd);
+
+ fdput(f);
+ return ret;
+}
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1ef6f75d92f1..fada22dc4ab6 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2770,8 +2770,6 @@ void register_console(struct console *newcon)
* for us.
*/
logbuf_lock_irqsave(flags);
- console_seq = syslog_seq;
- console_idx = syslog_idx;
/*
* We're about to replay the log buffer. Only do this to the
* just-registered console to avoid excessive message spam to
@@ -2783,6 +2781,8 @@ void register_console(struct console *newcon)
*/
exclusive_console = newcon;
exclusive_console_stop_seq = console_seq;
+ console_seq = syslog_seq;
+ console_idx = syslog_idx;
logbuf_unlock_irqrestore(flags);
}
console_unlock();
diff --git a/kernel/profile.c b/kernel/profile.c
index 4b144b02ca5d..6f69a4195d56 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -442,18 +442,18 @@ static ssize_t prof_cpu_mask_proc_write(struct file *file,
return err;
}
-static const struct file_operations prof_cpu_mask_proc_fops = {
- .open = prof_cpu_mask_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = prof_cpu_mask_proc_write,
+static const struct proc_ops prof_cpu_mask_proc_ops = {
+ .proc_open = prof_cpu_mask_proc_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_release = single_release,
+ .proc_write = prof_cpu_mask_proc_write,
};
void create_prof_cpu_mask(void)
{
/* create /proc/irq/prof_cpu_mask */
- proc_create("irq/prof_cpu_mask", 0600, NULL, &prof_cpu_mask_proc_fops);
+ proc_create("irq/prof_cpu_mask", 0600, NULL, &prof_cpu_mask_proc_ops);
}
/*
@@ -517,10 +517,10 @@ static ssize_t write_profile(struct file *file, const char __user *buf,
return count;
}
-static const struct file_operations proc_profile_operations = {
- .read = read_profile,
- .write = write_profile,
- .llseek = default_llseek,
+static const struct proc_ops profile_proc_ops = {
+ .proc_read = read_profile,
+ .proc_write = write_profile,
+ .proc_lseek = default_llseek,
};
int __ref create_proc_profile(void)
@@ -548,7 +548,7 @@ int __ref create_proc_profile(void)
err = 0;
#endif
entry = proc_create("profile", S_IWUSR | S_IRUGO,
- NULL, &proc_profile_operations);
+ NULL, &profile_proc_ops);
if (!entry)
goto err_state_onl;
proc_set_size(entry, (1 + prof_len) * sizeof(atomic_t));
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 6935a9e2b094..dcbd75791f39 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -508,7 +508,6 @@ static void synchronize_rcu_expedited_wait(void)
tick_dep_set_cpu(cpu, TICK_DEP_BIT_RCU_EXP);
}
}
- WARN_ON_ONCE(1);
}
for (;;) {
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index db7b50bba3f1..ac4bd0ca11cc 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1251,40 +1251,40 @@ static int psi_fop_release(struct inode *inode, struct file *file)
return single_release(inode, file);
}
-static const struct file_operations psi_io_fops = {
- .open = psi_io_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .write = psi_io_write,
- .poll = psi_fop_poll,
- .release = psi_fop_release,
+static const struct proc_ops psi_io_proc_ops = {
+ .proc_open = psi_io_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_write = psi_io_write,
+ .proc_poll = psi_fop_poll,
+ .proc_release = psi_fop_release,
};
-static const struct file_operations psi_memory_fops = {
- .open = psi_memory_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .write = psi_memory_write,
- .poll = psi_fop_poll,
- .release = psi_fop_release,
+static const struct proc_ops psi_memory_proc_ops = {
+ .proc_open = psi_memory_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_write = psi_memory_write,
+ .proc_poll = psi_fop_poll,
+ .proc_release = psi_fop_release,
};
-static const struct file_operations psi_cpu_fops = {
- .open = psi_cpu_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .write = psi_cpu_write,
- .poll = psi_fop_poll,
- .release = psi_fop_release,
+static const struct proc_ops psi_cpu_proc_ops = {
+ .proc_open = psi_cpu_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_write = psi_cpu_write,
+ .proc_poll = psi_fop_poll,
+ .proc_release = psi_fop_release,
};
static int __init psi_proc_init(void)
{
if (psi_enable) {
proc_mkdir("pressure", NULL);
- proc_create("pressure/io", 0, NULL, &psi_io_fops);
- proc_create("pressure/memory", 0, NULL, &psi_memory_fops);
- proc_create("pressure/cpu", 0, NULL, &psi_cpu_fops);
+ proc_create("pressure/io", 0, NULL, &psi_io_proc_ops);
+ proc_create("pressure/memory", 0, NULL, &psi_memory_proc_ops);
+ proc_create("pressure/cpu", 0, NULL, &psi_cpu_proc_ops);
}
return 0;
}
diff --git a/kernel/signal.c b/kernel/signal.c
index bcd46f547db3..9ad8dea93dbb 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1383,7 +1383,7 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
* must see ->sighand == NULL.
*/
spin_lock_irqsave(&sighand->siglock, *flags);
- if (likely(sighand == tsk->sighand))
+ if (likely(sighand == rcu_access_pointer(tsk->sighand)))
break;
spin_unlock_irqrestore(&sighand->siglock, *flags);
}
diff --git a/kernel/sys.c b/kernel/sys.c
index a9331f101883..f9bc5c303e3f 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2261,6 +2261,8 @@ int __weak arch_prctl_spec_ctrl_set(struct task_struct *t, unsigned long which,
return -EINVAL;
}
+#define PR_IO_FLUSHER (PF_MEMALLOC_NOIO | PF_LESS_THROTTLE)
+
SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
unsigned long, arg4, unsigned long, arg5)
{
@@ -2488,6 +2490,29 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
return -EINVAL;
error = GET_TAGGED_ADDR_CTRL();
break;
+ case PR_SET_IO_FLUSHER:
+ if (!capable(CAP_SYS_RESOURCE))
+ return -EPERM;
+
+ if (arg3 || arg4 || arg5)
+ return -EINVAL;
+
+ if (arg2 == 1)
+ current->flags |= PR_IO_FLUSHER;
+ else if (!arg2)
+ current->flags &= ~PR_IO_FLUSHER;
+ else
+ return -EINVAL;
+ break;
+ case PR_GET_IO_FLUSHER:
+ if (!capable(CAP_SYS_RESOURCE))
+ return -EPERM;
+
+ if (arg2 || arg3 || arg4 || arg5)
+ return -EINVAL;
+
+ error = (current->flags & PR_IO_FLUSHER) == PR_IO_FLUSHER;
+ break;
default:
error = -EINVAL;
break;
diff --git a/kernel/sysctl-test.c b/kernel/sysctl-test.c
index 2a63241a8453..ccb78509f1a8 100644
--- a/kernel/sysctl-test.c
+++ b/kernel/sysctl-test.c
@@ -389,4 +389,6 @@ static struct kunit_suite sysctl_test_suite = {
.test_cases = sysctl_test_cases,
};
-kunit_test_suite(sysctl_test_suite);
+kunit_test_suites(&sysctl_test_suite);
+
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c
index 9e59c9ea92aa..ca4e6d57d68b 100644
--- a/kernel/time/itimer.c
+++ b/kernel/time/itimer.c
@@ -97,20 +97,20 @@ static int do_getitimer(int which, struct itimerspec64 *value)
return 0;
}
-static int put_itimerval(struct itimerval __user *o,
+static int put_itimerval(struct __kernel_old_itimerval __user *o,
const struct itimerspec64 *i)
{
- struct itimerval v;
+ struct __kernel_old_itimerval v;
v.it_interval.tv_sec = i->it_interval.tv_sec;
v.it_interval.tv_usec = i->it_interval.tv_nsec / NSEC_PER_USEC;
v.it_value.tv_sec = i->it_value.tv_sec;
v.it_value.tv_usec = i->it_value.tv_nsec / NSEC_PER_USEC;
- return copy_to_user(o, &v, sizeof(struct itimerval)) ? -EFAULT : 0;
+ return copy_to_user(o, &v, sizeof(struct __kernel_old_itimerval)) ? -EFAULT : 0;
}
-SYSCALL_DEFINE2(getitimer, int, which, struct itimerval __user *, value)
+SYSCALL_DEFINE2(getitimer, int, which, struct __kernel_old_itimerval __user *, value)
{
struct itimerspec64 get_buffer;
int error = do_getitimer(which, &get_buffer);
@@ -314,11 +314,11 @@ SYSCALL_DEFINE1(alarm, unsigned int, seconds)
#endif
-static int get_itimerval(struct itimerspec64 *o, const struct itimerval __user *i)
+static int get_itimerval(struct itimerspec64 *o, const struct __kernel_old_itimerval __user *i)
{
- struct itimerval v;
+ struct __kernel_old_itimerval v;
- if (copy_from_user(&v, i, sizeof(struct itimerval)))
+ if (copy_from_user(&v, i, sizeof(struct __kernel_old_itimerval)))
return -EFAULT;
/* Validate the timevals in value. */
@@ -333,8 +333,8 @@ static int get_itimerval(struct itimerspec64 *o, const struct itimerval __user *
return 0;
}
-SYSCALL_DEFINE3(setitimer, int, which, struct itimerval __user *, value,
- struct itimerval __user *, ovalue)
+SYSCALL_DEFINE3(setitimer, int, which, struct __kernel_old_itimerval __user *, value,
+ struct __kernel_old_itimerval __user *, ovalue)
{
struct itimerspec64 set_buffer, get_buffer;
int error;
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 704ccd9451b0..cdd7386115ff 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -626,10 +626,12 @@ EXPORT_SYMBOL(__usecs_to_jiffies);
* The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec
* value to a scaled second value.
*/
-static unsigned long
-__timespec64_to_jiffies(u64 sec, long nsec)
+
+unsigned long
+timespec64_to_jiffies(const struct timespec64 *value)
{
- nsec = nsec + TICK_NSEC - 1;
+ u64 sec = value->tv_sec;
+ long nsec = value->tv_nsec + TICK_NSEC - 1;
if (sec >= MAX_SEC_IN_JIFFIES){
sec = MAX_SEC_IN_JIFFIES;
@@ -640,18 +642,6 @@ __timespec64_to_jiffies(u64 sec, long nsec)
(NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC;
}
-
-static unsigned long
-__timespec_to_jiffies(unsigned long sec, long nsec)
-{
- return __timespec64_to_jiffies((u64)sec, nsec);
-}
-
-unsigned long
-timespec64_to_jiffies(const struct timespec64 *value)
-{
- return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec);
-}
EXPORT_SYMBOL(timespec64_to_jiffies);
void
@@ -669,44 +659,6 @@ jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value)
EXPORT_SYMBOL(jiffies_to_timespec64);
/*
- * We could use a similar algorithm to timespec_to_jiffies (with a
- * different multiplier for usec instead of nsec). But this has a
- * problem with rounding: we can't exactly add TICK_NSEC - 1 to the
- * usec value, since it's not necessarily integral.
- *
- * We could instead round in the intermediate scaled representation
- * (i.e. in units of 1/2^(large scale) jiffies) but that's also
- * perilous: the scaling introduces a small positive error, which
- * combined with a division-rounding-upward (i.e. adding 2^(scale) - 1
- * units to the intermediate before shifting) leads to accidental
- * overflow and overestimates.
- *
- * At the cost of one additional multiplication by a constant, just
- * use the timespec implementation.
- */
-unsigned long
-timeval_to_jiffies(const struct timeval *value)
-{
- return __timespec_to_jiffies(value->tv_sec,
- value->tv_usec * NSEC_PER_USEC);
-}
-EXPORT_SYMBOL(timeval_to_jiffies);
-
-void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value)
-{
- /*
- * Convert jiffies to nanoseconds and separate with
- * one divide.
- */
- u32 rem;
-
- value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC,
- NSEC_PER_SEC, &rem);
- value->tv_usec = rem / NSEC_PER_USEC;
-}
-EXPORT_SYMBOL(jiffies_to_timeval);
-
-/*
* Convert jiffies/jiffies_64 to clock_t and back.
*/
clock_t jiffies_to_clock_t(unsigned long x)
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 7be3e7530841..257ffb993ea2 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -24,6 +24,7 @@ void bacct_add_tsk(struct user_namespace *user_ns,
const struct cred *tcred;
u64 utime, stime, utimescaled, stimescaled;
u64 delta;
+ time64_t btime;
BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
@@ -32,9 +33,11 @@ void bacct_add_tsk(struct user_namespace *user_ns,
/* Convert to micro seconds */
do_div(delta, NSEC_PER_USEC);
stats->ac_etime = delta;
- /* Convert to seconds for btime */
- do_div(delta, USEC_PER_SEC);
- stats->ac_btime = get_seconds() - delta;
+ /* Convert to seconds for btime (note y2106 limit) */
+ btime = ktime_get_real_seconds() - div_u64(delta, USEC_PER_SEC);
+ stats->ac_btime = clamp_t(time64_t, btime, 0, U32_MAX);
+ stats->ac_btime64 = btime;
+
if (thread_group_leader(tsk)) {
stats->ac_exitcode = tsk->exit_code;
if (tsk->flags & PF_FORKNOEXEC)
Copyright © 1990 – 2022 jet tsang zeon-git.
All Rights Reverse Engineered.