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-rw-r--r--init/Kconfig37
-rw-r--r--init/do_mounts_initrd.c22
-rw-r--r--init/initramfs.c76
-rw-r--r--init/main.c13
4 files changed, 105 insertions, 43 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 0cff02738290..583675727b85 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -77,6 +77,11 @@ config CC_HAS_ASM_GOTO_OUTPUT
depends on CC_HAS_ASM_GOTO
def_bool $(success,echo 'int foo(int x) { asm goto ("": "=r"(x) ::: bar); return x; bar: return 0; }' | $(CC) -x c - -c -o /dev/null)
+config CC_HAS_ASM_GOTO_TIED_OUTPUT
+ depends on CC_HAS_ASM_GOTO_OUTPUT
+ # Detect buggy gcc and clang, fixed in gcc-11 clang-14.
+ def_bool $(success,echo 'int foo(int *x) { asm goto (".long (%l[bar]) - .\n": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $CC -x c - -c -o /dev/null)
+
config TOOLS_SUPPORT_RELR
def_bool $(success,env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh)
@@ -418,8 +423,8 @@ config CROSS_MEMORY_ATTACH
See the man page for more details.
config USELIB
- bool "uselib syscall"
- def_bool ALPHA || M68K || SPARC || X86_32 || IA32_EMULATION
+ bool "uselib syscall (for libc5 and earlier)"
+ default ALPHA || M68K || SPARC
help
This option enables the uselib syscall, a system call used in the
dynamic linker from libc5 and earlier. glibc does not use this
@@ -698,8 +703,7 @@ config IKHEADERS
config LOG_BUF_SHIFT
int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
- range 12 25 if !H8300
- range 12 19 if H8300
+ range 12 25
default 17
depends on PRINTK
help
@@ -1344,6 +1348,16 @@ config BOOT_CONFIG
If unsure, say Y.
+config INITRAMFS_PRESERVE_MTIME
+ bool "Preserve cpio archive mtimes in initramfs"
+ default y
+ help
+ Each entry in an initramfs cpio archive carries an mtime value. When
+ enabled, extracted cpio items take this mtime, with directory mtime
+ setting deferred until after creation of any child entries.
+
+ If unsure, say Y.
+
choice
prompt "Compiler optimization level"
default CC_OPTIMIZE_FOR_PERFORMANCE
@@ -1925,6 +1939,17 @@ config MODULE_FORCE_UNLOAD
rmmod). This is mainly for kernel developers and desperate users.
If unsure, say N.
+config MODULE_UNLOAD_TAINT_TRACKING
+ bool "Tainted module unload tracking"
+ depends on MODULE_UNLOAD
+ default n
+ help
+ This option allows you to maintain a record of each unloaded
+ module that tainted the kernel. In addition to displaying a
+ list of linked (or loaded) modules e.g. on detection of a bad
+ page (see bad_page()), the aforementioned details are also
+ shown. If unsure, say N.
+
config MODVERSIONS
bool "Module versioning support"
help
@@ -1943,10 +1968,6 @@ config ASM_MODVERSIONS
assembly. This can be enabled only when the target architecture
supports it.
-config MODULE_REL_CRCS
- bool
- depends on MODVERSIONS
-
config MODULE_SRCVERSION_ALL
bool "Source checksum for all modules"
help
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 533d81ed74d4..327962ea354c 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -14,12 +14,32 @@
unsigned long initrd_start, initrd_end;
int initrd_below_start_ok;
-unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
+static unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
static int __initdata mount_initrd = 1;
phys_addr_t phys_initrd_start __initdata;
unsigned long phys_initrd_size __initdata;
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kern_do_mounts_initrd_table[] = {
+ {
+ .procname = "real-root-dev",
+ .data = &real_root_dev,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ { }
+};
+
+static __init int kernel_do_mounts_initrd_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_do_mounts_initrd_table);
+ return 0;
+}
+late_initcall(kernel_do_mounts_initrd_sysctls_init);
+#endif /* CONFIG_SYSCTL */
+
static int __init no_initrd(char *str)
{
mount_initrd = 0;
diff --git a/init/initramfs.c b/init/initramfs.c
index 2f3d96dc3db6..dc84cf756cea 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -17,8 +17,11 @@
#include <linux/init_syscalls.h>
#include <linux/umh.h>
-static ssize_t __init xwrite(struct file *file, const char *p, size_t count,
- loff_t *pos)
+static __initdata bool csum_present;
+static __initdata u32 io_csum;
+
+static ssize_t __init xwrite(struct file *file, const unsigned char *p,
+ size_t count, loff_t *pos)
{
ssize_t out = 0;
@@ -33,6 +36,13 @@ static ssize_t __init xwrite(struct file *file, const char *p, size_t count,
} else if (rv == 0)
break;
+ if (csum_present) {
+ ssize_t i;
+
+ for (i = 0; i < rv; i++)
+ io_csum += p[i];
+ }
+
p += rv;
out += rv;
count -= rv;
@@ -116,31 +126,36 @@ static void __init free_hash(void)
}
}
-static long __init do_utime(char *filename, time64_t mtime)
+#ifdef CONFIG_INITRAMFS_PRESERVE_MTIME
+static void __init do_utime(char *filename, time64_t mtime)
{
- struct timespec64 t[2];
+ struct timespec64 t[2] = { { .tv_sec = mtime }, { .tv_sec = mtime } };
+ init_utimes(filename, t);
+}
- t[0].tv_sec = mtime;
- t[0].tv_nsec = 0;
- t[1].tv_sec = mtime;
- t[1].tv_nsec = 0;
- return init_utimes(filename, t);
+static void __init do_utime_path(const struct path *path, time64_t mtime)
+{
+ struct timespec64 t[2] = { { .tv_sec = mtime }, { .tv_sec = mtime } };
+ vfs_utimes(path, t);
}
static __initdata LIST_HEAD(dir_list);
struct dir_entry {
struct list_head list;
- char *name;
time64_t mtime;
+ char name[];
};
static void __init dir_add(const char *name, time64_t mtime)
{
- struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL);
+ size_t nlen = strlen(name) + 1;
+ struct dir_entry *de;
+
+ de = kmalloc(sizeof(struct dir_entry) + nlen, GFP_KERNEL);
if (!de)
panic_show_mem("can't allocate dir_entry buffer");
INIT_LIST_HEAD(&de->list);
- de->name = kstrdup(name, GFP_KERNEL);
+ strscpy(de->name, name, nlen);
de->mtime = mtime;
list_add(&de->list, &dir_list);
}
@@ -151,10 +166,15 @@ static void __init dir_utime(void)
list_for_each_entry_safe(de, tmp, &dir_list, list) {
list_del(&de->list);
do_utime(de->name, de->mtime);
- kfree(de->name);
kfree(de);
}
}
+#else
+static void __init do_utime(char *filename, time64_t mtime) {}
+static void __init do_utime_path(const struct path *path, time64_t mtime) {}
+static void __init dir_add(const char *name, time64_t mtime) {}
+static void __init dir_utime(void) {}
+#endif
static __initdata time64_t mtime;
@@ -166,15 +186,16 @@ static __initdata unsigned long body_len, name_len;
static __initdata uid_t uid;
static __initdata gid_t gid;
static __initdata unsigned rdev;
+static __initdata u32 hdr_csum;
static void __init parse_header(char *s)
{
- unsigned long parsed[12];
+ unsigned long parsed[13];
char buf[9];
int i;
buf[8] = '\0';
- for (i = 0, s += 6; i < 12; i++, s += 8) {
+ for (i = 0, s += 6; i < 13; i++, s += 8) {
memcpy(buf, s, 8);
parsed[i] = simple_strtoul(buf, NULL, 16);
}
@@ -189,6 +210,7 @@ static void __init parse_header(char *s)
minor = parsed[8];
rdev = new_encode_dev(MKDEV(parsed[9], parsed[10]));
name_len = parsed[11];
+ hdr_csum = parsed[12];
}
/* FSM */
@@ -257,12 +279,15 @@ static int __init do_collect(void)
static int __init do_header(void)
{
- if (memcmp(collected, "070707", 6)==0) {
- error("incorrect cpio method used: use -H newc option");
- return 1;
- }
- if (memcmp(collected, "070701", 6)) {
- error("no cpio magic");
+ if (!memcmp(collected, "070701", 6)) {
+ csum_present = false;
+ } else if (!memcmp(collected, "070702", 6)) {
+ csum_present = true;
+ } else {
+ if (memcmp(collected, "070707", 6) == 0)
+ error("incorrect cpio method used: use -H newc option");
+ else
+ error("no cpio magic");
return 1;
}
parse_header(collected);
@@ -353,6 +378,7 @@ static int __init do_name(void)
if (IS_ERR(wfile))
return 0;
wfile_pos = 0;
+ io_csum = 0;
vfs_fchown(wfile, uid, gid);
vfs_fchmod(wfile, mode);
@@ -380,15 +406,13 @@ static int __init do_name(void)
static int __init do_copy(void)
{
if (byte_count >= body_len) {
- struct timespec64 t[2] = { };
if (xwrite(wfile, victim, body_len, &wfile_pos) != body_len)
error("write error");
- t[0].tv_sec = mtime;
- t[1].tv_sec = mtime;
- vfs_utimes(&wfile->f_path, t);
-
+ do_utime_path(&wfile->f_path, mtime);
fput(wfile);
+ if (csum_present && io_csum != hdr_csum)
+ error("bad data checksum");
eat(body_len);
state = SkipIt;
return 0;
diff --git a/init/main.c b/init/main.c
index 98182c3c2c4b..f057c49f1d9d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1035,21 +1035,18 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
softirq_init();
timekeeping_init();
kfence_init();
+ time_init();
/*
* For best initial stack canary entropy, prepare it after:
* - setup_arch() for any UEFI RNG entropy and boot cmdline access
- * - timekeeping_init() for ktime entropy used in rand_initialize()
- * - rand_initialize() to get any arch-specific entropy like RDRAND
- * - add_latent_entropy() to get any latent entropy
- * - adding command line entropy
+ * - timekeeping_init() for ktime entropy used in random_init()
+ * - time_init() for making random_get_entropy() work on some platforms
+ * - random_init() to initialize the RNG from from early entropy sources
*/
- rand_initialize();
- add_latent_entropy();
- add_device_randomness(command_line, strlen(command_line));
+ random_init(command_line);
boot_init_stack_canary();
- time_init();
perf_event_init();
profile_init();
call_function_init();