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initramfs: Always do fput() and load modules after rootfs populate 

In OpenRISC we do not have a bootloader passed initrd, but the built in
initramfs does contain the /init and other binaries, including modules.
The previous commit 0886551480 ("initramfs: finish fput() before
accessing any binary from initramfs") made a change to only call fput()
if the bootloader initrd was available, this caused intermittent crashes
for OpenRISC.

This patch changes the fput() to happen unconditionally if any rootfs is
loaded. Also, I added some comments to make it a bit more clear why we
call unpack_to_rootfs() multiple times.

Fixes: 0886551480 ("initramfs: finish fput() before accessing any binary from initramfs")
Cc: stable@vger.kernel.org
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Stafford Horne <shorne@gmail.com>
zero-colors
Stafford Horne 2017-05-04 21:15:56 +09:00
parent a351e9b9fc
commit 17a9be3174
1 changed files with 9 additions and 6 deletions
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15
init/initramfs.c
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@ -608,9 +608,11 @@ static void __init clean_rootfs(void)
static int __init populate_rootfs(void)
{
/* Load the built in initramfs */
char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
if (err)
panic("%s", err); /* Failed to decompress INTERNAL initramfs */
/* If available load the bootloader supplied initrd */
if (initrd_start) {
#ifdef CONFIG_BLK_DEV_RAM
int fd;
@ -648,13 +650,14 @@ static int __init populate_rootfs(void)
printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err);
free_initrd();
#endif
flush_delayed_fput();
/*
* Try loading default modules from initramfs. This gives
* us a chance to load before device_initcalls.
*/
load_default_modules();
}
flush_delayed_fput();
/*
* Try loading default modules from initramfs. This gives
* us a chance to load before device_initcalls.
*/
load_default_modules();
return 0;
}
rootfs_initcall(populate_rootfs);