From 5913ea1ba2fa7f5fc055c8ade361e06ddb666120 Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Sat, 6 May 2023 08:18:11 +0200 Subject: generic: 5.15: add pending patch fixing binfmt compilation warning Add pending patch fixing binfmt compilation warning on some arch. This fix 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 Signed-off-by: Christian Marangi --- ...dynamically-allocate-note.data-in-parse_e.patch | 94 ++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 target/linux/generic/pending-5.15/130-binfmt_elf-dynamically-allocate-note.data-in-parse_e.patch (limited to 'target/linux/generic') 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 new file mode 100644 index 0000000000..f04007e982 --- /dev/null +++ b/target/linux/generic/pending-5.15/130-binfmt_elf-dynamically-allocate-note.data-in-parse_e.patch @@ -0,0 +1,94 @@ +From ca71e00839fcdd26f122fb6d9e97903c9fe198f7 Mon Sep 17 00:00:00 2001 +From: Christian Marangi +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 +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, ¬e, 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; + } + -- cgit v1.2.3