lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 16 Jan 2022 12:36:49 -0600
From:   Rob Landley <>
To:     "" <>
Subject: [PATCH] Wire up CONFIG_DEVTMPFS_MOUNT to initramfs.

From: Rob Landley <>

The kernel has had CONFIG_DEVTMPFS_MOUNT for years, but it only applied to
fallback ROOT= not initramfs/initmpfs. As long as the config option exists, it
might as well work.

I use this for board bringup: populating a chdir and calling cpio as a normal
user often leaves /dev empty (because mknod requires root access), meaning no
/dev/console for init/main.c to open, meaning init runs without
stdin/stdout/stderr and has to mount devtmpfs and redirect the filehandles blind
with no error output if something goes wrong.

Signed-off-by: Rob Landley <>

 init/main.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/init/main.c b/init/main.c
index bb984ed79de0..288c73db57f4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1612,7 +1612,6 @@ static noinline void __init kernel_init_freeable(void)

-	console_on_rootfs();

 	 * check if there is an early userspace init.  If yes, let it do all
@@ -1621,7 +1620,11 @@ static noinline void __init kernel_init_freeable(void)
 	if (init_eaccess(ramdisk_execute_command) != 0) {
 		ramdisk_execute_command = NULL;
+		sys_mkdir("/dev", 0755);
+		devtmpfs_mount();
+	console_on_rootfs();

 	 * Ok, we have completed the initial bootup, and

Powered by blists - more mailing lists