[PATCH 2/4] fs/anon_inodes.c, fs/attr.c, fs/bad_inode.c, fs/binfmt_aout.c, fs/binfmt_elf.c: Cosmetic

From: Alejandro Colomar
Date: Sat Nov 21 2020 - 08:58:15 EST

This patch contains only trivial changes:
Some of them found with checkpatch.pl in strict mode.

- Remove trailing whitespace.
- Remove spaces coming before tabs.
- Fix typos in comments.
- Convert spaces into tabs.
- Add a space around operators that should have them,
and remove them when they shouldn't have them sround,
according to coding_style.rst.
- Use braces accordint to coding_style.rst.
- Align multi-line function prototypes, and other similar cases.
- Remove or add blank lines:
* Add blank lines after declarations, and before code.
* Remove blank lines after function definitions and before
EXPORT_SYMBOL().
- Remove redundant parentheses, when the don't improve readability.
- Fix comments' style according to coding_style.rst.
- Simplify comparisons against NULL, using '!' (or nothing at all).
- Use C89 comments (/* */), instead of C99 (//).

Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx>
---
fs/anon_inodes.c | 1 +
fs/attr.c | 7 +--
fs/bad_inode.c | 50 +++++++++---------
fs/binfmt_aout.c | 94 +++++++++++++++++-----------------
fs/binfmt_elf.c | 129 ++++++++++++++++++++++++-----------------------
5 files changed, 143 insertions(+), 138 deletions(-)

diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 7609d208bb53..bef68dbcbb88 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -43,6 +43,7 @@ static const struct dentry_operations anon_inodefs_dentry_operations = {
static int anon_inodefs_init_fs_context(struct fs_context *fc)
{
struct pseudo_fs_context *ctx = init_pseudo(fc, ANON_INODE_FS_MAGIC);
+
if (!ctx)
return -ENOMEM;
ctx->dops = &anon_inodefs_dentry_operations;
diff --git a/fs/attr.c b/fs/attr.c
index b4bbdbd4c8ca..b32ad8c678a5 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -64,7 +64,7 @@ int setattr_prepare(struct dentry *dentry, struct iattr *attr)
unsigned int ia_valid = attr->ia_valid;

/*
- * First check size constraints. These can't be overriden using
+ * First check size constraints. These can't be overridden using
* ATTR_FORCE.
*/
if (ia_valid & ATTR_SIZE) {
@@ -220,7 +220,8 @@ EXPORT_SYMBOL(setattr_copy);
* the file open for write, as there can be no conflicting delegation in
* that case.
*/
-int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **delegated_inode)
+int notify_change(struct dentry *dentry, struct iattr *attr,
+ struct inode **delegated_inode)
{
struct inode *inode = dentry->d_inode;
umode_t mode = inode->i_mode;
@@ -284,7 +285,7 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de
* no function will ever call notify_change with both ATTR_MODE and
* ATTR_KILL_S*ID set.
*/
- if ((ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) &&
+ if ((ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) &&
(ia_valid & ATTR_MODE))
BUG();

diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 54f0ce444272..f0457b6c17dc 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -22,25 +22,25 @@ static int bad_file_open(struct inode *inode, struct file *filp)
return -EIO;
}

-static const struct file_operations bad_file_ops =
-{
+static const struct file_operations bad_file_ops = {
.open = bad_file_open,
};

-static int bad_inode_create (struct inode *dir, struct dentry *dentry,
- umode_t mode, bool excl)
+static int bad_inode_create(struct inode *dir, struct dentry *dentry,
+ umode_t mode, bool excl)
{
return -EIO;
}

static struct dentry *bad_inode_lookup(struct inode *dir,
- struct dentry *dentry, unsigned int flags)
+ struct dentry *dentry,
+ unsigned int flags)
{
return ERR_PTR(-EIO);
}

-static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
+static int bad_inode_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
{
return -EIO;
}
@@ -50,25 +50,25 @@ static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
return -EIO;
}

-static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
- const char *symname)
+static int bad_inode_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
{
return -EIO;
}

static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
- umode_t mode)
+ umode_t mode)
{
return -EIO;
}

-static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
+static int bad_inode_rmdir(struct inode *dir, struct dentry *dentry)
{
return -EIO;
}

-static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
- umode_t mode, dev_t rdev)
+static int bad_inode_mknod(struct inode *dir, struct dentry *dentry,
+ umode_t mode, dev_t rdev)
{
return -EIO;
}
@@ -81,7 +81,7 @@ static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
}

static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
+ int buflen)
{
return -EIO;
}
@@ -103,7 +103,7 @@ static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
}

static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
- size_t buffer_size)
+ size_t buffer_size)
{
return -EIO;
}
@@ -152,8 +152,7 @@ static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
return -EIO;
}

-static const struct inode_operations bad_inode_ops =
-{
+static const struct inode_operations bad_inode_ops = {
.create = bad_inode_create,
.lookup = bad_inode_lookup,
.link = bad_inode_link,
@@ -181,12 +180,12 @@ static const struct inode_operations bad_inode_ops =
/*
* When a filesystem is unable to read an inode due to an I/O error in
* its read_inode() function, it can call make_bad_inode() to return a
- * set of stubs which will return EIO errors as required.
+ * set of stubs which will return EIO errors as required.
*
* We only need to do limited initialisation: all other fields are
* preinitialised to zero automatically.
*/
-
+
/**
* make_bad_inode - mark an inode bad due to an I/O error
* @inode: Inode to mark bad
@@ -195,7 +194,7 @@ static const struct inode_operations bad_inode_ops =
* failure this function makes the inode "bad" and causes I/O operations
* on it to fail from this point on.
*/
-
+
void make_bad_inode(struct inode *inode)
{
remove_inode_hash(inode);
@@ -203,9 +202,9 @@ void make_bad_inode(struct inode *inode)
inode->i_mode = S_IFREG;
inode->i_atime = inode->i_mtime = inode->i_ctime =
current_time(inode);
- inode->i_op = &bad_inode_ops;
+ inode->i_op = &bad_inode_ops;
inode->i_opflags &= ~IOP_XATTR;
- inode->i_fop = &bad_file_ops;
+ inode->i_fop = &bad_file_ops;
}
EXPORT_SYMBOL(make_bad_inode);

@@ -214,19 +213,18 @@ EXPORT_SYMBOL(make_bad_inode);
* &bad_inode_ops to cover the case of invalidated inodes as well as
* those created by make_bad_inode() above.
*/
-
+
/**
* is_bad_inode - is an inode errored
* @inode: inode to test
*
* Returns true if the inode in question has been marked as bad.
*/
-
+
bool is_bad_inode(struct inode *inode)
{
- return (inode->i_op == &bad_inode_ops);
+ return (inode->i_op == &bad_inode_ops);
}
-
EXPORT_SYMBOL(is_bad_inode);

/**
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 3e84e9bb9084..92d6b70ddab0 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -32,7 +32,7 @@
#include <asm/cacheflush.h>

static int load_aout_binary(struct linux_binprm *);
-static int load_aout_library(struct file*);
+static int load_aout_library(struct file *);

static struct linux_binfmt aout_format = {
.module = THIS_MODULE,
@@ -56,7 +56,7 @@ static int set_brk(unsigned long start, unsigned long end)
* memory and creates the pointer tables from them, and puts their
* addresses on the "stack", returning the new stack pointer value.
*/
-static unsigned long __user *create_aout_tables(char __user *p, struct linux_binprm * bprm)
+static unsigned long __user *create_aout_tables(char __user *p, struct linux_binprm *bprm)
{
char __user * __user *argv;
char __user * __user *envp;
@@ -64,7 +64,7 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin
int argc = bprm->argc;
int envc = bprm->envc;

- sp = (void __user *)((-(unsigned long)sizeof(char *)) & (unsigned long) p);
+ sp = (void __user *)((-(unsigned long)sizeof(char *)) & (unsigned long)p);
#ifdef __alpha__
/* whee.. test-programs are so much fun. */
put_user(0, --sp);
@@ -78,34 +78,36 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin
put_user(bprm->exec, --sp);
put_user(1001, --sp);
#endif
- sp -= envc+1;
+ sp -= envc + 1;
envp = (char __user * __user *) sp;
- sp -= argc+1;
+ sp -= argc + 1;
argv = (char __user * __user *) sp;
#ifndef __alpha__
- put_user((unsigned long) envp,--sp);
- put_user((unsigned long) argv,--sp);
+ put_user((unsigned long)envp, --sp);
+ put_user((unsigned long)argv, --sp);
#endif
- put_user(argc,--sp);
- current->mm->arg_start = (unsigned long) p;
- while (argc-->0) {
+ put_user(argc, --sp);
+ current->mm->arg_start = (unsigned long)p;
+ while (argc-- > 0) {
char c;
- put_user(p,argv++);
+
+ put_user(p, argv++);
do {
- get_user(c,p++);
+ get_user(c, p++);
} while (c);
}
- put_user(NULL,argv);
- current->mm->arg_end = current->mm->env_start = (unsigned long) p;
- while (envc-->0) {
+ put_user(NULL, argv);
+ current->mm->arg_end = current->mm->env_start = (unsigned long)p;
+ while (envc-- > 0) {
char c;
- put_user(p,envp++);
+
+ put_user(p, envp++);
do {
- get_user(c,p++);
+ get_user(c, p++);
} while (c);
}
- put_user(NULL,envp);
- current->mm->env_end = (unsigned long) p;
+ put_user(NULL, envp);
+ current->mm->env_end = (unsigned long)p;
return sp;
}

@@ -114,7 +116,7 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin
* libraries. There is no binary dependent code anywhere else.
*/

-static int load_aout_binary(struct linux_binprm * bprm)
+static int load_aout_binary(struct linux_binprm *bprm)
{
struct pt_regs *regs = current_pt_regs();
struct exec ex;
@@ -123,11 +125,14 @@ static int load_aout_binary(struct linux_binprm * bprm)
unsigned long rlim;
int retval;

- ex = *((struct exec *) bprm->buf); /* exec-header */
+ ex = *(struct exec *)bprm->buf; /* exec-header */
if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
N_TRSIZE(ex) || N_DRSIZE(ex) ||
- i_size_read(file_inode(bprm->file)) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
+ i_size_read(file_inode(bprm->file)) < ex.a_text +
+ ex.a_data +
+ N_SYMSIZE(ex) +
+ N_TXTOFF(ex)) {
return -ENOEXEC;
}

@@ -174,7 +179,6 @@ static int load_aout_binary(struct linux_binprm * bprm)
if (retval < 0)
return retval;

-
if (N_MAGIC(ex) == OMAGIC) {
unsigned long text_addr, map_size;
loff_t pos;
@@ -183,35 +187,34 @@ static int load_aout_binary(struct linux_binprm * bprm)

#ifdef __alpha__
pos = fd_offset;
- map_size = ex.a_text+ex.a_data + PAGE_SIZE - 1;
+ map_size = ex.a_text + ex.a_data + PAGE_SIZE - 1;
#else
pos = 32;
- map_size = ex.a_text+ex.a_data;
+ map_size = ex.a_text + ex.a_data;
#endif
error = vm_brk(text_addr & PAGE_MASK, map_size);
if (error)
return error;

error = read_code(bprm->file, text_addr, pos,
- ex.a_text+ex.a_data);
+ ex.a_text + ex.a_data);
if ((signed long)error < 0)
return error;
} else {
if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
- (N_MAGIC(ex) != NMAGIC) && printk_ratelimit())
- {
+ (N_MAGIC(ex) != NMAGIC) &&
+ printk_ratelimit()) {
printk(KERN_NOTICE "executable not page aligned\n");
}

- if ((fd_offset & ~PAGE_MASK) != 0 && printk_ratelimit())
- {
- printk(KERN_WARNING
+ if ((fd_offset & ~PAGE_MASK) != 0 && printk_ratelimit()) {
+ printk(KERN_WARNING
"fd_offset is not page aligned. Please convert program: %pD\n",
bprm->file);
}

- if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
- error = vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+ if (!bprm->file->f_op->mmap || ((fd_offset & ~PAGE_MASK) != 0)) {
+ error = vm_brk(N_TXTADDR(ex), ex.a_text + ex.a_data);
if (error)
return error;

@@ -221,9 +224,9 @@ static int load_aout_binary(struct linux_binprm * bprm)
}

error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
- PROT_READ | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
- fd_offset);
+ PROT_READ | PROT_EXEC,
+ MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
+ fd_offset);

if (error != N_TXTADDR(ex))
return error;
@@ -243,7 +246,7 @@ static int load_aout_binary(struct linux_binprm * bprm)
return retval;

current->mm->start_stack =
- (unsigned long) create_aout_tables((char __user *) bprm->p, bprm);
+ (unsigned long)create_aout_tables((char __user *)bprm->p, bprm);
#ifdef __alpha__
regs->gp = ex.a_gpvalue;
#endif
@@ -254,7 +257,7 @@ static int load_aout_binary(struct linux_binprm * bprm)

static int load_aout_library(struct file *file)
{
- struct inode * inode;
+ struct inode *inode;
unsigned long bss, start_addr, len;
unsigned long error;
int retval;
@@ -271,7 +274,8 @@ static int load_aout_library(struct file *file)
/* We come in here for the regular a.out style of shared libraries */
if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
- i_size_read(inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
+ i_size_read(inode) < ex.a_text + ex.a_data + N_SYMSIZE(ex) +
+ N_TXTOFF(ex)) {
goto out;
}

@@ -285,15 +289,15 @@ static int load_aout_library(struct file *file)
if (N_FLAGS(ex))
goto out;

- /* For QMAGIC, the starting address is 0x20 into the page. We mask
- this off to get the starting address for the page */
-
+ /*
+ * For QMAGIC, the starting address is 0x20 into the page.
+ * We mask this off to get the starting address for the page
+ */
start_addr = ex.a_entry & 0xfffff000;

if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
- if (printk_ratelimit())
- {
- printk(KERN_WARNING
+ if (printk_ratelimit()) {
+ printk(KERN_WARNING
"N_TXTOFF is not page aligned. Please convert library: %pD\n",
file);
}
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index fa50e8936f5f..955927ac2b80 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1025,10 +1025,12 @@ static int load_elf_binary(struct linux_binprm *bprm)
start_data = 0;
end_data = 0;

- /* Now we do a little grungy work by mmapping the ELF image into
- the correct location in memory. */
- for(i = 0, elf_ppnt = elf_phdata;
- i < elf_ex->e_phnum; i++, elf_ppnt++) {
+ /*
+ * Now we do a little grungy work by mmapping the ELF image into
+ * the correct location in memory.
+ */
+ for (i = 0, elf_ppnt = elf_phdata; i < elf_ex->e_phnum;
+ i++, elf_ppnt++) {
int elf_prot, elf_flags;
unsigned long k, vaddr;
unsigned long total_size = 0;
@@ -1037,12 +1039,14 @@ static int load_elf_binary(struct linux_binprm *bprm)
if (elf_ppnt->p_type != PT_LOAD)
continue;

- if (unlikely (elf_brk > elf_bss)) {
+ if (unlikely(elf_brk > elf_bss)) {
unsigned long nbyte;
-
- /* There was a PT_LOAD segment with p_memsz > p_filesz
- before this one. Map anonymous pages, if needed,
- and clear the area. */
+
+ /*
+ * There was a PT_LOAD segment with p_memsz > p_filesz
+ * before this one. Map anonymous pages, if needed,
+ * and clear the area.
+ */
retval = set_brk(elf_bss + load_bias,
elf_brk + load_bias,
bss_prot);
@@ -1139,7 +1143,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
elf_prot, elf_flags, total_size);
if (BAD_ADDR(error)) {
retval = IS_ERR((void *)error) ?
- PTR_ERR((void*)error) : -EINVAL;
+ PTR_ERR((void *)error) : -EINVAL;
goto out_free_dentry;
}

@@ -1252,7 +1256,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
#endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */

retval = create_elf_tables(bprm, elf_ex,
- load_addr, interp_load_addr, e_entry);
+ load_addr, interp_load_addr, e_entry);
if (retval < 0)
goto out;

@@ -1283,10 +1287,12 @@ static int load_elf_binary(struct linux_binprm *bprm)
}

if (current->personality & MMAP_PAGE_ZERO) {
- /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
- and some applications "depend" upon this behavior.
- Since we do not have the power to recompile these, we
- emulate the SVr4 behavior. Sigh. */
+ /*
+ * Why this, you ask??? Well SVr4 maps page 0 as read-only,
+ * and some applications "depend" upon this behavior.
+ * Since we do not have the power to recompile these, we
+ * emulate the SVr4 behavior. Sigh.
+ */
error = vm_mmap(NULL, 0, PAGE_SIZE, PROT_READ | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE, 0);
}
@@ -1325,8 +1331,10 @@ static int load_elf_binary(struct linux_binprm *bprm)
}

#ifdef CONFIG_USELIB
-/* This is really simpleminded and specialized - we are loading an
- a.out library that is given an ELF header. */
+/*
+ * This is really simpleminded and specialized - we are loading an
+ * a.out library that is given an ELF header.
+ */
static int load_elf_library(struct file *file)
{
struct elf_phdr *elf_phdata;
@@ -1366,7 +1374,7 @@ static int load_elf_library(struct file *file)
if (retval < 0)
goto out_free_ph;

- for (j = 0, i = 0; i<elf_ex.e_phnum; i++)
+ for (j = 0, i = 0; i < elf_ex.e_phnum; i++)
if ((eppnt + i)->p_type == PT_LOAD)
j++;
if (j != 1)
@@ -1418,8 +1426,7 @@ static int load_elf_library(struct file *file)
*/

/* An ELF note in memory */
-struct memelfnote
-{
+struct memelfnote {
const char *name;
int type;
unsigned int datasz;
@@ -1440,6 +1447,7 @@ static int notesize(struct memelfnote *en)
static int writenote(struct memelfnote *men, struct coredump_params *cprm)
{
struct elf_note en;
+
en.n_namesz = strlen(men->name) + 1;
en.n_descsz = men->datasz;
en.n_type = men->type;
@@ -1482,8 +1490,8 @@ static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
phdr->p_align = 0;
}

-static void fill_note(struct memelfnote *note, const char *name, int type,
- unsigned int sz, void *data)
+static void fill_note(struct memelfnote *note, const char *name, int type,
+ unsigned int sz, void *data)
{
note->name = name;
note->type = type;
@@ -1496,7 +1504,7 @@ static void fill_note(struct memelfnote *note, const char *name, int type,
* registers which need to be filled up separately.
*/
static void fill_prstatus(struct elf_prstatus *prstatus,
- struct task_struct *p, long signr)
+ struct task_struct *p, long signr)
{
prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
prstatus->pr_sigpend = p->pending.signal.sig[0];
@@ -1534,17 +1542,17 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
{
const struct cred *cred;
unsigned int i, len;
-
+
/* first copy the parameters from user space */
memset(psinfo, 0, sizeof(struct elf_prpsinfo));

len = mm->arg_end - mm->arg_start;
if (len >= ELF_PRARGSZ)
- len = ELF_PRARGSZ-1;
+ len = ELF_PRARGSZ - 1;
if (copy_from_user(&psinfo->pr_psargs,
- (const char __user *)mm->arg_start, len))
+ (const char __user *)mm->arg_start, len))
return -EFAULT;
- for(i = 0; i < len; i++)
+ for (i = 0; i < len; i++)
if (psinfo->pr_psargs[i] == 0)
psinfo->pr_psargs[i] = ' ';
psinfo->pr_psargs[len] = 0;
@@ -1568,14 +1576,15 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
SET_GID(psinfo->pr_gid, from_kgid_munged(cred->user_ns, cred->gid));
rcu_read_unlock();
strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
-
+
return 0;
}

static void fill_auxv_note(struct memelfnote *note, struct mm_struct *mm)
{
- elf_addr_t *auxv = (elf_addr_t *) mm->saved_auxv;
+ elf_addr_t *auxv = (elf_addr_t *)mm->saved_auxv;
int i = 0;
+
do
i += 2;
while (auxv[i - 2] != AT_NULL);
@@ -1583,13 +1592,13 @@ static void fill_auxv_note(struct memelfnote *note, struct mm_struct *mm)
}

static void fill_siginfo_note(struct memelfnote *note, user_siginfo_t *csigdata,
- const kernel_siginfo_t *siginfo)
+ const kernel_siginfo_t *siginfo)
{
copy_siginfo_to_external(csigdata, siginfo);
fill_note(note, "CORE", NT_SIGINFO, sizeof(*csigdata), csigdata);
}

-#define MAX_FILE_NOTE_SIZE (4*1024*1024)
+#define MAX_FILE_NOTE_SIZE (4 * 1024 * 1024)
/*
* Format of NT_FILE note:
*
@@ -1605,7 +1614,7 @@ static int fill_files_note(struct memelfnote *note)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- unsigned count, size, names_ofs, remaining, n;
+ unsigned int count, size, names_ofs, remaining, n;
user_long_t *data;
user_long_t *start_end_ofs;
char *name_base, *name_curpos;
@@ -1633,7 +1642,7 @@ static int fill_files_note(struct memelfnote *note)
name_base = name_curpos = ((char *)data) + names_ofs;
remaining = size - names_ofs;
count = 0;
- for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
struct file *file;
const char *filename;

@@ -1739,7 +1748,8 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
*/
fill_prstatus(&t->prstatus, t->task, signr);
regset0_size = regset_get(t->task, &view->regsets[0],
- sizeof(t->prstatus.pr_reg), &t->prstatus.pr_reg);
+ sizeof(t->prstatus.pr_reg),
+ &t->prstatus.pr_reg);
if (regset0_size < 0)
return 0;

@@ -1762,7 +1772,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
int ret;

do_thread_regset_writeback(t->task, regset);
- if (!note_type) // not for coredumps
+ if (!note_type) /* not for coredumps */
continue;
if (regset->active && regset->active(t->task, regset) <= 0)
continue;
@@ -1798,16 +1808,14 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
info->thread = NULL;

psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
- if (psinfo == NULL) {
+ if (!psinfo) {
info->psinfo.data = NULL; /* So we don't free this wrongly */
return 0;
}

fill_note(&info->psinfo, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);

- /*
- * Figure out how many notes we're going to need for each thread.
- */
+ /* Figure out how many notes we're going to need for each thread. */
info->thread_notes = 0;
for (i = 0; i < view->n; ++i)
if (view->regsets[i].core_note_type != 0)
@@ -1823,15 +1831,11 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
return 0;
}

- /*
- * Initialize the ELF file header.
- */
+ /* Initialize the ELF file header. */
fill_elf_header(elf, phdrs,
view->e_machine, view->e_flags);

- /*
- * Allocate a structure for each thread.
- */
+ /* Allocate a structure for each thread. */
for (ct = &dump_task->mm->core_state->dumper; ct; ct = ct->next) {
t = kzalloc(offsetof(struct elf_thread_core_info,
notes[info->thread_notes]),
@@ -1853,16 +1857,12 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
}
}

- /*
- * Now fill in each thread's information.
- */
- for (t = info->thread; t != NULL; t = t->next)
+ /* Now fill in each thread's information. */
+ for (t = info->thread; t; t = t->next)
if (!fill_thread_core_info(t, view, siginfo->si_signo, &info->size))
return 0;

- /*
- * Fill in the two process-wide notes.
- */
+ /* Fill in the two process-wide notes. */
fill_psinfo(psinfo, dump_task->group_leader, dump_task->mm);
info->size += notesize(&info->psinfo);

@@ -1905,8 +1905,7 @@ static int write_note_info(struct elf_note_info *info,
return 0;
if (first && !writenote(&info->auxv, cprm))
return 0;
- if (first && info->files.data &&
- !writenote(&info->files, cprm))
+ if (first && info->files.data && !writenote(&info->files, cprm))
return 0;

for (i = 1; i < info->thread_notes; ++i)
@@ -1924,6 +1923,7 @@ static int write_note_info(struct elf_note_info *info,
static void free_note_info(struct elf_note_info *info)
{
struct elf_thread_core_info *threads = info->thread;
+
while (threads) {
unsigned int i;
struct elf_thread_core_info *t = threads;
@@ -1940,8 +1940,7 @@ static void free_note_info(struct elf_note_info *info)
#else

/* Here is the structure in which status of each thread is captured. */
-struct elf_thread_status
-{
+struct elf_thread_status {
struct list_head list;
struct elf_prstatus prstatus; /* NT_PRSTATUS */
elf_fpregset_t fpu; /* NT_PRFPREG */
@@ -1959,20 +1958,21 @@ static int elf_dump_thread_status(long signr, struct elf_thread_status *t)
{
int sz = 0;
struct task_struct *p = t->thread;
+
t->num_notes = 0;

fill_prstatus(&t->prstatus, p, signr);
- elf_core_copy_task_regs(p, &t->prstatus.pr_reg);
-
+ elf_core_copy_task_regs(p, &t->prstatus.pr_reg);
+
fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus),
- &(t->prstatus));
+ &t->prstatus);
t->num_notes++;
sz += notesize(&t->notes[0]);

- if ((t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL,
- &t->fpu))) {
+ t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu);
+ if (t->prstatus.pr_fpvalid) {
fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu),
- &(t->fpu));
+ &t->fpu);
t->num_notes++;
sz += notesize(&t->notes[1]);
}
@@ -2179,7 +2179,8 @@ static int elf_core_dump(struct coredump_params *cprm)

/* If segs > PN_XNUM(0xffff), then e_phnum overflows. To avoid
* this, kernel supports extended numbering. Have a look at
- * include/linux/elf.h for further information. */
+ * include/linux/elf.h for further information.
+ */
e_phnum = segs > PN_XNUM ? PN_XNUM : segs;

/*
@@ -2257,7 +2258,7 @@ static int elf_core_dump(struct coredump_params *cprm)
if (!elf_core_write_extra_phdrs(cprm, offset))
goto end_coredump;

- /* write out the notes section */
+ /* write out the notes section */
if (!write_note_info(&info, cprm))
goto end_coredump;

--
2.28.0