Files
rockchip-kernel/include/linux
Pasha Tatashin dabba87229 fs/kernel_read_file: allow to read files up-to ssize_t
Patch series "Allow to kexec with initramfs larger than 2G", v2.

Currently, the largest initramfs that is supported by kexec_file_load()
syscall is 2G.

This is because kernel_read_file() returns int, and is limited to INT_MAX
or 2G.

On the other hand, there are kexec based boot loaders (i.e.  u-root), that
may need to boot netboot images that might be larger than 2G.

The first patch changes the return type from int to ssize_t in
kernel_read_file* functions.

The second patch increases the maximum initramfs file size to 4G.

Tested: verified that can kexec_file_load() works with 4G initramfs
on x86_64.


This patch (of 2):

Currently, the maximum file size that is supported is 2G.  This may be too
small in some cases.  For example, kexec_file_load() system call loads
initramfs.  In some netboot cases initramfs can be rather large.

Allow to use up-to ssize_t bytes.  The callers still can limit the maximum
file size via buf_size.

Link: https://lkml.kernel.org/r/20220527025535.3953665-1-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20220527025535.3953665-2-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Baoquan He <bhe@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-06-16 19:58:21 -07:00
..
2022-05-10 16:03:52 +08:00
2022-04-20 12:59:50 +05:30
2022-05-22 20:44:29 +01:00
2022-03-23 19:58:38 +01:00
2022-06-08 14:04:14 -04:00
2022-05-20 15:29:00 -07:00
2022-03-11 19:15:03 -08:00
2022-04-22 12:32:03 +02:00
2022-03-15 10:32:44 +01:00
2022-05-16 13:37:59 -07:00
2022-03-16 15:13:36 -07:00
2022-06-03 06:52:57 -07:00
2022-05-13 07:20:18 -07:00
2022-03-02 22:44:49 -08:00
2022-02-28 23:26:27 -08:00
2022-02-19 19:23:53 -08:00
2022-02-14 15:43:15 +01:00
2022-03-18 09:47:04 +01:00
2022-05-02 14:06:20 -06:00
2022-06-06 09:52:17 +09:00
2022-05-03 16:09:03 -04:00
2022-04-21 07:36:56 -04:00
2022-05-19 14:08:53 -07:00
2022-03-21 12:57:38 -04:00
2022-05-13 07:20:17 -07:00
2022-04-28 23:16:14 -07:00
2022-05-12 10:29:41 -07:00
2022-04-28 16:31:10 +02:00
2022-04-01 14:40:44 -04:00
2022-05-17 13:32:46 -04:00
2022-04-05 10:24:38 +02:00
2022-04-19 10:19:02 -07:00
2022-06-10 11:29:48 +02:00
2022-03-08 14:33:36 -06:00
2022-03-17 20:16:29 -07:00
2022-03-23 19:58:41 +01:00
2022-05-22 21:03:01 +01:00
2022-04-07 12:53:54 +02:00
2022-02-24 15:04:51 +00:00
2022-06-02 10:15:05 -07:00
2022-05-08 01:33:08 -07:00
2022-02-25 09:36:06 +01:00
2022-04-11 19:18:27 -06:00
2022-03-22 15:57:11 -07:00
2022-05-24 08:41:18 -06:00
2022-05-31 12:45:10 -04:00