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Geyslan Gregório Bem
hackingbits.com
2013/9/28 Geyslan G. Bem <geys...@gmail.com>:
> Adjustment based on the checkpatch.pl.
>
> Tested.
>
> Signed-off-by: Geyslan G. Bem <geys...@gmail.com>
> ---
> fs/exec.c | 92
> ++++++++++++++++++++++++++++++++++-----------------------------
> 1 file changed, 49 insertions(+), 43 deletions(-)
>
> diff --git a/fs/exec.c b/fs/exec.c
> index 8875dd1..b5c6086 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -19,7 +19,7 @@
> * current->executable is only used by the procfs. This allows a dispatch
> * table to check for several different types of binary formats. We keep
> * trying until we recognize the file or we run out of supported binary
> - * formats.
> + * formats.
> */
>
> #include <linux/slab.h>
> @@ -55,8 +55,8 @@
> #include <linux/pipe_fs_i.h>
> #include <linux/oom.h>
> #include <linux/compat.h>
> +#include <linux/uaccess.h>
>
> -#include <asm/uaccess.h>
> #include <asm/mmu_context.h>
> #include <asm/tlb.h>
>
> @@ -71,7 +71,7 @@ int suid_dumpable = 0;
> static LIST_HEAD(formats);
> static DEFINE_RWLOCK(binfmt_lock);
>
> -void __register_binfmt(struct linux_binfmt * fmt, int insert)
> +void __register_binfmt(struct linux_binfmt *fmt, int insert)
> {
> BUG_ON(!fmt);
> if (WARN_ON(!fmt->load_binary))
> @@ -81,19 +81,17 @@ void __register_binfmt(struct linux_binfmt * fmt, int
> insert)
> list_add_tail(&fmt->lh, &formats);
> write_unlock(&binfmt_lock);
> }
> -
> EXPORT_SYMBOL(__register_binfmt);
>
> -void unregister_binfmt(struct linux_binfmt * fmt)
> +void unregister_binfmt(struct linux_binfmt *fmt)
> {
> write_lock(&binfmt_lock);
> list_del(&fmt->lh);
> write_unlock(&binfmt_lock);
> }
> -
> EXPORT_SYMBOL(unregister_binfmt);
>
> -static inline void put_binfmt(struct linux_binfmt * fmt)
> +static inline void put_binfmt(struct linux_binfmt *fmt)
> {
> module_put(fmt->module);
> }
> @@ -136,8 +134,8 @@ SYSCALL_DEFINE1(uselib, const char __user *, library)
> fsnotify_open(file);
>
> error = -ENOEXEC;
> - if(file->f_op) {
> - struct linux_binfmt * fmt;
> + if (file->f_op) {
> + struct linux_binfmt *fmt;
>
> read_lock(&binfmt_lock);
> list_for_each_entry(fmt, &formats, lh) {
> @@ -154,10 +152,11 @@ SYSCALL_DEFINE1(uselib, const char __user *, library)
> }
> read_unlock(&binfmt_lock);
> }
> +
> exit:
> fput(file);
> out:
> - return error;
> + return error;
> }
>
> #ifdef CONFIG_MMU
> @@ -180,7 +179,7 @@ static void acct_arg_size(struct linux_binprm *bprm,
> unsigned long pages)
> }
>
> static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long
> pos,
> - int write)
> + int write)
> {
> struct page *page;
> int ret;
> @@ -241,7 +240,7 @@ static void free_arg_pages(struct linux_binprm *bprm)
> }
>
> static void flush_arg_page(struct linux_binprm *bprm, unsigned long pos,
> - struct page *page)
> + struct page *page)
> {
> flush_cache_page(bprm->vma, pos, page_to_pfn(page));
> }
> @@ -268,7 +267,9 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
> BUILD_BUG_ON(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP);
> vma->vm_end = STACK_TOP_MAX;
> vma->vm_start = vma->vm_end - PAGE_SIZE;
> - vma->vm_flags = VM_SOFTDIRTY | VM_STACK_FLAGS |
> VM_STACK_INCOMPLETE_SETUP;
> + vma->vm_flags = (VM_SOFTDIRTY |
> + VM_STACK_FLAGS |
> + VM_STACK_INCOMPLETE_SETUP);
> vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
> INIT_LIST_HEAD(&vma->anon_vma_chain);
>
> @@ -299,7 +300,7 @@ static inline void acct_arg_size(struct linux_binprm
> *bprm, unsigned long pages)
> }
>
> static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long
> pos,
> - int write)
> + int write)
> {
> struct page *page;
>
> @@ -335,7 +336,7 @@ static void free_arg_pages(struct linux_binprm *bprm)
> }
>
> static void flush_arg_page(struct linux_binprm *bprm, unsigned long pos,
> - struct page *page)
> + struct page *page)
> {
> }
>
> @@ -616,7 +617,9 @@ static int shift_arg_pages(struct vm_area_struct *vma,
> unsigned long shift)
> * when the old and new regions overlap clear from new_end.
> */
> free_pgd_range(&tlb, new_end, old_end, new_end,
> - vma->vm_next ? vma->vm_next->vm_start :
> USER_PGTABLES_CEILING);
> + vma->vm_next
> + ? vma->vm_next->vm_start
> + : USER_PGTABLES_CEILING);
> } else {
> /*
> * otherwise, clean from old_start; this is done to not touch
> @@ -625,7 +628,9 @@ static int shift_arg_pages(struct vm_area_struct *vma,
> unsigned long shift)
> * for the others its just a little faster.
> */
> free_pgd_range(&tlb, old_start, old_end, new_end,
> - vma->vm_next ? vma->vm_next->vm_start :
> USER_PGTABLES_CEILING);
> + vma->vm_next
> + ? vma->vm_next->vm_start
> + : USER_PGTABLES_CEILING);
> }
> tlb_finish_mmu(&tlb, old_start, old_end);
>
> @@ -803,7 +808,6 @@ int kernel_read(struct file *file, loff_t offset,
> set_fs(old_fs);
> return result;
> }
> -
> EXPORT_SYMBOL(kernel_read);
>
> ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t
> len)
> @@ -818,7 +822,7 @@ EXPORT_SYMBOL(read_code);
> static int exec_mmap(struct mm_struct *mm)
> {
> struct task_struct *tsk;
> - struct mm_struct * old_mm, *active_mm;
> + struct mm_struct *old_mm, *active_mm;
>
> /* Notify parent that we're no longer interested in the old VM */
> tsk = current;
> @@ -1064,7 +1068,7 @@ static void filename_to_taskname(char *tcomm, const
> char *fn, unsigned int len)
> tcomm[i] = '\0';
> }
>
> -int flush_old_exec(struct linux_binprm * bprm)
> +int flush_old_exec(struct linux_binprm *bprm)
> {
> int retval;
>
> @@ -1109,14 +1113,15 @@ void would_dump(struct linux_binprm *bprm, struct
> file *file)
> }
> EXPORT_SYMBOL(would_dump);
>
> -void setup_new_exec(struct linux_binprm * bprm)
> +void setup_new_exec(struct linux_binprm *bprm)
> {
> arch_pick_mmap_layout(current->mm);
>
> /* This is the point of no return */
> current->sas_ss_sp = current->sas_ss_size = 0;
>
> - if (uid_eq(current_euid(), current_uid()) && gid_eq(current_egid(),
> current_gid()))
> + if (uid_eq(current_euid(), current_uid()) &&
> + gid_eq(current_egid(), current_gid()))
> set_dumpable(current->mm, SUID_DUMP_USER);
> else
> set_dumpable(current->mm, suid_dumpable);
> @@ -1143,7 +1148,7 @@ void setup_new_exec(struct linux_binprm * bprm)
> group */
>
> current->self_exec_id++;
> -
> +
> flush_signal_handlers(current, 0);
> do_close_on_exec(current->files);
> }
> @@ -1269,8 +1274,8 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
> return res;
> }
>
> -/*
> - * Fill the binprm structure from the inode.
> +/*
> + * Fill the binprm structure from the inode.
> * Check permissions, then read the first 128 (BINPRM_BUF_SIZE) bytes
> *
> * This may be called multiple times for binary chains (scripts for example).
> @@ -1278,7 +1283,7 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
> int prepare_binprm(struct linux_binprm *bprm)
> {
> umode_t mode;
> - struct inode * inode = file_inode(bprm->file);
> + struct inode *inode = file_inode(bprm->file);
> int retval;
>
> mode = inode->i_mode;
> @@ -1320,7 +1325,6 @@ int prepare_binprm(struct linux_binprm *bprm)
> memset(bprm->buf, 0, BINPRM_BUF_SIZE);
> return kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
> }
> -
> EXPORT_SYMBOL(prepare_binprm);
>
> /*
> @@ -1367,7 +1371,9 @@ out:
> }
> EXPORT_SYMBOL(remove_arg_zero);
>
> -#define printable(c) (((c)=='\t') || ((c)=='\n') || (0x20<=(c) && (c)<=0x7e))
> +#define printable(c) (((c) == '\t') || \
> + ((c) == '\n') || \
> + (0x20 <= (c) && (c) <= 0x7e))
> /*
> * cycle the list of binary formats handler, until one recognizes the image
> */
> @@ -1413,7 +1419,8 @@ int search_binary_handler(struct linux_binprm *bprm)
> if (printable(bprm->buf[0]) && printable(bprm->buf[1]) &&
> printable(bprm->buf[2]) && printable(bprm->buf[3]))
> return retval;
> - if (request_module("binfmt-%04x", *(ushort *)(bprm->buf + 2))
> < 0)
> + if (request_module("binfmt-%04x",
> + *(ushort *)(bprm->buf + 2)) < 0)
> return retval;
> need_retry = false;
> goto retry;
> @@ -1455,8 +1462,8 @@ static int exec_binprm(struct linux_binprm *bprm)
> * sys_execve() executes a new program.
> */
> static int do_execve_common(const char *filename,
> - struct user_arg_ptr argv,
> - struct user_arg_ptr envp)
> + struct user_arg_ptr argv,
> + struct user_arg_ptr envp)
> {
> struct linux_binprm *bprm;
> struct file *file;
> @@ -1514,12 +1521,12 @@ static int do_execve_common(const char *filename,
> if (retval)
> goto out_file;
>
> - bprm->argc = count(argv, MAX_ARG_STRINGS);
> - if ((retval = bprm->argc) < 0)
> + retval = bprm->argc = count(argv, MAX_ARG_STRINGS);
> + if (retval < 0)
> goto out;
>
> - bprm->envc = count(envp, MAX_ARG_STRINGS);
> - if ((retval = bprm->envc) < 0)
> + retval = bprm->envc = count(envp, MAX_ARG_STRINGS);
> + if (retval < 0)
> goto out;
>
> retval = prepare_binprm(bprm);
> @@ -1580,8 +1587,8 @@ out_ret:
> }
>
> int do_execve(const char *filename,
> - const char __user *const __user *__argv,
> - const char __user *const __user *__envp)
> + const char __user *const __user *__argv,
> + const char __user *const __user *__envp)
> {
> struct user_arg_ptr argv = { .ptr.native = __argv };
> struct user_arg_ptr envp = { .ptr.native = __envp };
> @@ -1590,8 +1597,8 @@ int do_execve(const char *filename,
>
> #ifdef CONFIG_COMPAT
> static int compat_do_execve(const char *filename,
> - const compat_uptr_t __user *__argv,
> - const compat_uptr_t __user *__envp)
> + const compat_uptr_t __user *__argv,
> + const compat_uptr_t __user *__envp)
> {
> struct user_arg_ptr argv = {
> .is_compat = true,
> @@ -1616,7 +1623,6 @@ void set_binfmt(struct linux_binfmt *new)
> if (new)
> __module_get(new->module);
> }
> -
> EXPORT_SYMBOL(set_binfmt);
>
> /*
> @@ -1687,9 +1693,9 @@ SYSCALL_DEFINE3(execve,
> return error;
> }
> #ifdef CONFIG_COMPAT
> -asmlinkage long compat_sys_execve(const char __user * filename,
> - const compat_uptr_t __user * argv,
> - const compat_uptr_t __user * envp)
> +asmlinkage long compat_sys_execve(const char __user *filename,
> + const compat_uptr_t __user *argv,
> + const compat_uptr_t __user *envp)
> {
> struct filename *path = getname(filename);
> int error = PTR_ERR(path);
> --
> 1.8.4
>
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