summaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-11 02:58:42 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-11 02:58:42 +0300
commit9967468c0a109644e4a1f5b39b39bf86fe7507a7 (patch)
tree72b7764c6dd6d74ede25688545a2e0c29dde3a2b /kernel
parent548aa0e3c516d906dae5edb1fc9a1ad2e490120a (diff)
parentdd83c161fbcc5d8be637ab159c0de015cbff5ba4 (diff)
downloadlinux-9967468c0a109644e4a1f5b39b39bf86fe7507a7.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: - most of the rest of MM - KASAN updates - lib/ updates - checkpatch updates - some binfmt_elf changes - various misc bits * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (115 commits) kernel/exit.c: avoid undefined behaviour when calling wait4() kernel/signal.c: avoid undefined behaviour in kill_something_info binfmt_elf: safely increment argv pointers s390: reduce ELF_ET_DYN_BASE powerpc: move ELF_ET_DYN_BASE to 4GB / 4MB arm64: move ELF_ET_DYN_BASE to 4GB / 4MB arm: move ELF_ET_DYN_BASE to 4MB binfmt_elf: use ELF_ET_DYN_BASE only for PIE fs, epoll: short circuit fetching events if thread has been killed checkpatch: improve multi-line alignment test checkpatch: improve macro reuse test checkpatch: change format of --color argument to --color[=WHEN] checkpatch: silence perl 5.26.0 unescaped left brace warnings checkpatch: improve tests for multiple line function definitions checkpatch: remove false warning for commit reference checkpatch: fix stepping through statements with $stat and ctx_statement_block checkpatch: [HLP]LIST_HEAD is also declaration checkpatch: warn when a MAINTAINERS entry isn't [A-Z]:\t checkpatch: improve the unnecessary OOM message test lib/bsearch.c: micro-optimize pivot position calculation ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c4
-rw-r--r--kernel/extable.c3
-rw-r--r--kernel/groups.c35
-rw-r--r--kernel/kallsyms.c10
-rw-r--r--kernel/ksysfs.c2
-rw-r--r--kernel/module.c2
-rw-r--r--kernel/signal.c4
-rw-r--r--kernel/sys.c6
8 files changed, 28 insertions, 38 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 608c9775a37b..c5548faa9f37 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1639,6 +1639,10 @@ long kernel_wait4(pid_t upid, int __user *stat_addr, int options,
__WNOTHREAD|__WCLONE|__WALL))
return -EINVAL;
+ /* -INT_MIN is not defined */
+ if (upid == INT_MIN)
+ return -ESRCH;
+
if (upid == -1)
type = PIDTYPE_MAX;
else if (upid < 0) {
diff --git a/kernel/extable.c b/kernel/extable.c
index 223df4a328a4..38c2412401a1 100644
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -55,7 +55,8 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr)
{
const struct exception_table_entry *e;
- e = search_extable(__start___ex_table, __stop___ex_table-1, addr);
+ e = search_extable(__start___ex_table,
+ __stop___ex_table - __start___ex_table, addr);
if (!e)
e = search_module_extables(addr);
return e;
diff --git a/kernel/groups.c b/kernel/groups.c
index d09727692a2a..434f6665f187 100644
--- a/kernel/groups.c
+++ b/kernel/groups.c
@@ -5,6 +5,7 @@
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/security.h>
+#include <linux/sort.h>
#include <linux/syscalls.h>
#include <linux/user_namespace.h>
#include <linux/vmalloc.h>
@@ -76,32 +77,18 @@ static int groups_from_user(struct group_info *group_info,
return 0;
}
-/* a simple Shell sort */
+static int gid_cmp(const void *_a, const void *_b)
+{
+ kgid_t a = *(kgid_t *)_a;
+ kgid_t b = *(kgid_t *)_b;
+
+ return gid_gt(a, b) - gid_lt(a, b);
+}
+
static void groups_sort(struct group_info *group_info)
{
- int base, max, stride;
- int gidsetsize = group_info->ngroups;
-
- for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1)
- ; /* nothing */
- stride /= 3;
-
- while (stride) {
- max = gidsetsize - stride;
- for (base = 0; base < max; base++) {
- int left = base;
- int right = left + stride;
- kgid_t tmp = group_info->gid[right];
-
- while (left >= 0 && gid_gt(group_info->gid[left], tmp)) {
- group_info->gid[right] = group_info->gid[left];
- right = left;
- left -= stride;
- }
- group_info->gid[right] = tmp;
- }
- stride /= 3;
- }
+ sort(group_info->gid, group_info->ngroups, sizeof(*group_info->gid),
+ gid_cmp, NULL);
}
/* a simple bsearch */
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 6a3b249a2ae1..127e7cfafa55 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -28,12 +28,6 @@
#include <asm/sections.h>
-#ifdef CONFIG_KALLSYMS_ALL
-#define all_var 1
-#else
-#define all_var 0
-#endif
-
/*
* These will be re-linked against their real values
* during the second link stage.
@@ -82,7 +76,7 @@ static inline int is_kernel(unsigned long addr)
static int is_ksym_addr(unsigned long addr)
{
- if (all_var)
+ if (IS_ENABLED(CONFIG_KALLSYMS_ALL))
return is_kernel(addr);
return is_kernel_text(addr) || is_kernel_inittext(addr);
@@ -280,7 +274,7 @@ static unsigned long get_symbol_pos(unsigned long addr,
if (!symbol_end) {
if (is_kernel_inittext(addr))
symbol_end = (unsigned long)_einittext;
- else if (all_var)
+ else if (IS_ENABLED(CONFIG_KALLSYMS_ALL))
symbol_end = (unsigned long)_end;
else
symbol_end = (unsigned long)_etext;
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 23cd70651238..df1a9aa602a0 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -234,7 +234,7 @@ static struct attribute * kernel_attrs[] = {
NULL
};
-static struct attribute_group kernel_attr_group = {
+static const struct attribute_group kernel_attr_group = {
.attrs = kernel_attrs,
};
diff --git a/kernel/module.c b/kernel/module.c
index b3dbdde82e80..b0f92a365140 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -4196,7 +4196,7 @@ const struct exception_table_entry *search_module_extables(unsigned long addr)
goto out;
e = search_extable(mod->extable,
- mod->extable + mod->num_exentries - 1,
+ mod->num_exentries,
addr);
out:
preempt_enable();
diff --git a/kernel/signal.c b/kernel/signal.c
index 48a59eefd8ad..caed9133ae52 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1402,6 +1402,10 @@ static int kill_something_info(int sig, struct siginfo *info, pid_t pid)
return ret;
}
+ /* -INT_MIN is undefined. Exclude this case to avoid a UBSAN warning */
+ if (pid == INT_MIN)
+ return -ESRCH;
+
read_lock(&tasklist_lock);
if (pid != -1) {
ret = __kill_pgrp_info(sig, info,
diff --git a/kernel/sys.c b/kernel/sys.c
index 47d901586b4e..73fc0af147d0 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2360,7 +2360,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
case PR_GET_THP_DISABLE:
if (arg2 || arg3 || arg4 || arg5)
return -EINVAL;
- error = !!(me->mm->def_flags & VM_NOHUGEPAGE);
+ error = !!test_bit(MMF_DISABLE_THP, &me->mm->flags);
break;
case PR_SET_THP_DISABLE:
if (arg3 || arg4 || arg5)
@@ -2368,9 +2368,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
if (down_write_killable(&me->mm->mmap_sem))
return -EINTR;
if (arg2)
- me->mm->def_flags |= VM_NOHUGEPAGE;
+ set_bit(MMF_DISABLE_THP, &me->mm->flags);
else
- me->mm->def_flags &= ~VM_NOHUGEPAGE;
+ clear_bit(MMF_DISABLE_THP, &me->mm->flags);
up_write(&me->mm->mmap_sem);
break;
case PR_MPX_ENABLE_MANAGEMENT: