generic: drop useless binfmt patch fixing compilation warning

The compilation warning was triggered by wrongly set FRAME_WARN to 1024
even for 64bit. This was recently fix by correctly setting the
FRAME_WARN to 2048 for 64bit systems.

The compilation warning would still be triggered on 32bit system but the
actual code is never reached as ARCH_USE_GNU_PROPERTY is only set on
arm64 arch.

Drop the patch as kmalloc cause perf regression as suggested by upstream
maintainers.

Fixes: fa79baf4a6e2 ("generic: copy backport, hack, pending patch and config from 5.15 to 6.1")
Fixes: 5913ea1ba2fa ("generic: 5.15: add pending patch fixing binfmt compilation warning")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
(cherry picked from commit 62338f41625074640a4de9e26e5e67b010fe0ebe)

diff --git a/target/linux/generic/pending-5.15/130-binfmt_elf-dynamically-allocate-note.data-in-parse_e.patch b/target/linux/generic/pending-5.15/130-binfmt_elf-dynamically-allocate-note.data-in-parse_e.patch
deleted file mode 100644 (file)
index f04007e..0000000
--- a/target/linux/generic/pending-5.15/130-binfmt_elf-dynamically-allocate-note.data-in-parse_e.patch
+++ /dev/null
@@ -1,94 +0,0 @@
-From ca71e00839fcdd26f122fb6d9e97903c9fe198f7 Mon Sep 17 00:00:00 2001
-From: Christian Marangi <ansuelsmth@gmail.com>
-Date: Sat, 6 May 2023 08:08:35 +0200
-Subject: [PATCH] binfmt_elf: dynamically allocate note.data in
- parse_elf_properties
-
-Dynamically allocate note.data in parse_elf_properties to fix
-compilation warning on some arch.
-
-On some arch note.data exceet the stack limit for a single function and
-this cause the following compilation warning:
-fs/binfmt_elf.c: In function 'parse_elf_properties.isra':
-fs/binfmt_elf.c:821:1: error: the frame size of 1040 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
-  821 | }
-      | ^
-cc1: all warnings being treated as errors
-
-Fix this by dynamically allocating the array.
-
-Fixes: 00e19ceec80b ("ELF: Add ELF program property parsing support")
-Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
-Cc: stable@vger.kernel.org # v5.8+
----
- fs/binfmt_elf.c | 32 +++++++++++++++++++++++---------
- 1 file changed, 23 insertions(+), 9 deletions(-)
-
---- a/fs/binfmt_elf.c
-+++ b/fs/binfmt_elf.c
-@@ -768,7 +768,7 @@ static int parse_elf_properties(struct f
- {
-       union {
-               struct elf_note nhdr;
--              char data[NOTE_DATA_SZ];
-+              char *data;
-       } note;
-       loff_t pos;
-       ssize_t n;
-@@ -788,26 +788,38 @@ static int parse_elf_properties(struct f
-       if (phdr->p_filesz > sizeof(note))
-               return -ENOEXEC;
- 
-+      note.data = kcalloc(NOTE_DATA_SZ, sizeof(*note.data), GFP_KERNEL);
-+      if (!note.data)
-+              return -ENOMEM;
-+
-       pos = phdr->p_offset;
-       n = kernel_read(f, &note, phdr->p_filesz, &pos);
- 
-       BUILD_BUG_ON(sizeof(note) < sizeof(note.nhdr) + NOTE_NAME_SZ);
--      if (n < 0 || n < sizeof(note.nhdr) + NOTE_NAME_SZ)
--              return -EIO;
-+      if (n < 0 || n < sizeof(note.nhdr) + NOTE_NAME_SZ) {
-+              ret = -EIO;
-+              goto exit;
-+      }
- 
-       if (note.nhdr.n_type != NT_GNU_PROPERTY_TYPE_0 ||
-           note.nhdr.n_namesz != NOTE_NAME_SZ ||
-           strncmp(note.data + sizeof(note.nhdr),
--                  GNU_PROPERTY_TYPE_0_NAME, n - sizeof(note.nhdr)))
--              return -ENOEXEC;
-+                  GNU_PROPERTY_TYPE_0_NAME, n - sizeof(note.nhdr))) {
-+              ret = -ENOEXEC;
-+              goto exit;
-+      }
- 
-       off = round_up(sizeof(note.nhdr) + NOTE_NAME_SZ,
-                      ELF_GNU_PROPERTY_ALIGN);
--      if (off > n)
--              return -ENOEXEC;
--
--      if (note.nhdr.n_descsz > n - off)
--              return -ENOEXEC;
-+      if (off > n) {
-+              ret = -ENOEXEC;
-+              goto exit;
-+      }
-+
-+      if (note.nhdr.n_descsz > n - off) {
-+              ret = -ENOEXEC;
-+              goto exit;
-+      }
-       datasz = off + note.nhdr.n_descsz;
- 
-       have_prev_type = false;
-@@ -817,6 +829,8 @@ static int parse_elf_properties(struct f
-               have_prev_type = true;
-       } while (!ret);
- 
-+exit:
-+      kfree(note.data);
-       return ret == -ENOENT ? 0 : ret;
- }
-