[PATCH 27/31] exec: only build read_code when needed
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-10 07:57:33
Also in:
linux-alpha, linux-arch, linux-fsdevel, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-sh, linux-um, linuxppc-dev, lkml, sparclinux
Subsystem:
exec & binfmt api, elf, filesystems (vfs and infrastructure), the rest · Maintainers:
Kees Cook, Alexander Viro, Christian Brauner, Linus Torvalds
Only build read_code when binary formats that use it are built into the kernel. Signed-off-by: Christoph Hellwig <hch@lst.de> --- fs/exec.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/exec.c b/fs/exec.c
index 06b4c550af5d9..a4f766f296f8f 100644
--- a/fs/exec.c
+++ b/fs/exec.c@@ -1027,6 +1027,8 @@ int kernel_read_file_from_fd(int fd, void **buf, loff_t *size, loff_t max_size, } EXPORT_SYMBOL_GPL(kernel_read_file_from_fd); +#if defined(CONFIG_HAVE_AOUT) || defined(CONFIG_BINFMT_FLAT) || \ + defined(CONFIG_BINFMT_ELF_FDPIC) ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len) { ssize_t res = vfs_read(file, (void __user *)addr, len, &pos);
@@ -1035,6 +1037,7 @@ ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len) return res; } EXPORT_SYMBOL(read_code); +#endif /* * Maps the mm_struct mm into the current task struct.
--
2.26.2
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