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initramfs: use time64_t timestamps

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The cpio format uses a 32-bit number to encode file timestamps, which
breaks initramfs support in 2038.  This reinterprets the timestamp as
unsigned, to give us another 68 years and avoids breaking until 2106.

Link: http://lkml.kernel.org/r/20171019095536.801199-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Stafford Horne <shorne@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2017-11-17 15:31:04 -08:00 committed by Linus Torvalds
parent 44ea39420f
commit e35c4c64fe
1 changed files with 5 additions and 5 deletions
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10
init/initramfs.c
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@ -109,7 +109,7 @@ static void __init free_hash(void)
}
}
static long __init do_utime(char *filename, time_t mtime)
static long __init do_utime(char *filename, time64_t mtime)
{
struct timespec64 t[2];
@ -125,10 +125,10 @@ static __initdata LIST_HEAD(dir_list);
struct dir_entry {
struct list_head list;
char *name;
time_t mtime;
time64_t mtime;
};
static void __init dir_add(const char *name, time_t mtime)
static void __init dir_add(const char *name, time64_t mtime)
{
struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL);
if (!de)
@ -150,7 +150,7 @@ static void __init dir_utime(void)
}
}
static __initdata time_t mtime;
static __initdata time64_t mtime;
/* cpio header parsing */
@ -177,7 +177,7 @@ static void __init parse_header(char *s)
uid = parsed[2];
gid = parsed[3];
nlink = parsed[4];
mtime = parsed[5];
mtime = parsed[5]; /* breaks in y2106 */
body_len = parsed[6];
major = parsed[7];
minor = parsed[8];