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-rw-r--r--fs/9p/cache.h1
-rw-r--r--fs/binfmt_elf.c12
-rw-r--r--fs/buffer.c24
-rw-r--r--fs/cachefiles/namei.c2
-rw-r--r--fs/cachefiles/rdwr.c73
-rw-r--r--fs/debugfs/inode.c6
-rw-r--r--fs/ext4/inode.c4
-rw-r--r--fs/fscache/netfs.c38
-rw-r--r--fs/fscache/page.c2
-rw-r--r--fs/nilfs2/file.c2
-rw-r--r--fs/pipe.c18
-rw-r--r--fs/xfs/xfs_file.c2
12 files changed, 86 insertions, 98 deletions
diff --git a/fs/9p/cache.h b/fs/9p/cache.h
index 2f9675491095..247e47e54bcc 100644
--- a/fs/9p/cache.h
+++ b/fs/9p/cache.h
@@ -21,6 +21,7 @@
*/
#ifndef _9P_CACHE_H
+#define _9P_CACHE_H
#ifdef CONFIG_9P_FSCACHE
#include <linux/fscache.h>
#include <linux/spinlock.h>
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 5f399ea1d20a..3a93755e880f 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -488,7 +488,7 @@ static inline int arch_elf_pt_proc(struct elfhdr *ehdr,
}
/**
- * arch_check_elf() - check a PT_LOPROC..PT_HIPROC ELF program header
+ * arch_check_elf() - check an ELF executable
* @ehdr: The main ELF header
* @has_interp: True if the ELF has an interpreter, else false.
* @state: Architecture-specific state preserved throughout the process
@@ -760,16 +760,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
*/
would_dump(bprm, interpreter);
- retval = kernel_read(interpreter, 0, bprm->buf,
- BINPRM_BUF_SIZE);
- if (retval != BINPRM_BUF_SIZE) {
+ /* Get the exec headers */
+ retval = kernel_read(interpreter, 0,
+ (void *)&loc->interp_elf_ex,
+ sizeof(loc->interp_elf_ex));
+ if (retval != sizeof(loc->interp_elf_ex)) {
if (retval >= 0)
retval = -EIO;
goto out_free_dentry;
}
- /* Get the exec headers */
- loc->interp_elf_ex = *((struct elfhdr *)bprm->buf);
break;
}
elf_ppnt++;
diff --git a/fs/buffer.c b/fs/buffer.c
index 51aff0296ce2..4f4cd959da7c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2420,9 +2420,9 @@ EXPORT_SYMBOL(block_commit_write);
* unlock the page.
*
* Direct callers of this function should protect against filesystem freezing
- * using sb_start_write() - sb_end_write() functions.
+ * using sb_start_pagefault() - sb_end_pagefault() functions.
*/
-int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
+int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
get_block_t get_block)
{
struct page *page = vmf->page;
@@ -2459,26 +2459,6 @@ out_unlock:
unlock_page(page);
return ret;
}
-EXPORT_SYMBOL(__block_page_mkwrite);
-
-int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
- get_block_t get_block)
-{
- int ret;
- struct super_block *sb = file_inode(vma->vm_file)->i_sb;
-
- sb_start_pagefault(sb);
-
- /*
- * Update file times before taking page lock. We may end up failing the
- * fault so this update may be superfluous but who really cares...
- */
- file_update_time(vma->vm_file);
-
- ret = __block_page_mkwrite(vma, vmf, get_block);
- sb_end_pagefault(sb);
- return block_page_mkwrite_return(ret);
-}
EXPORT_SYMBOL(block_page_mkwrite);
/*
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index fc1056f5c96a..c4b893453e0e 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -655,6 +655,8 @@ lookup_again:
aops = d_backing_inode(object->dentry)->i_mapping->a_ops;
if (!aops->bmap)
goto check_error;
+ if (object->dentry->d_sb->s_blocksize > PAGE_SIZE)
+ goto check_error;
object->backer = object->dentry;
} else {
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 3cbb0e834694..7a6b02f72787 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -414,9 +414,6 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
ASSERT(inode->i_mapping->a_ops->readpages);
/* calculate the shift required to use bmap */
- if (inode->i_sb->s_blocksize > PAGE_SIZE)
- goto enobufs;
-
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
op->op.flags &= FSCACHE_OP_KEEP_FLAGS;
@@ -711,9 +708,6 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
ASSERT(inode->i_mapping->a_ops->readpages);
/* calculate the shift required to use bmap */
- if (inode->i_sb->s_blocksize > PAGE_SIZE)
- goto all_enobufs;
-
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
pagevec_init(&pagevec, 0);
@@ -905,6 +899,15 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
cache = container_of(object->fscache.cache,
struct cachefiles_cache, cache);
+ pos = (loff_t)page->index << PAGE_SHIFT;
+
+ /* We mustn't write more data than we have, so we have to beware of a
+ * partial page at EOF.
+ */
+ eof = object->fscache.store_limit_l;
+ if (pos >= eof)
+ goto error;
+
/* write the page to the backing filesystem and let it store it in its
* own time */
path.mnt = cache->mnt;
@@ -912,40 +915,38 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
file = dentry_open(&path, O_RDWR | O_LARGEFILE, cache->cache_cred);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
- } else {
- pos = (loff_t) page->index << PAGE_SHIFT;
-
- /* we mustn't write more data than we have, so we have
- * to beware of a partial page at EOF */
- eof = object->fscache.store_limit_l;
- len = PAGE_SIZE;
- if (eof & ~PAGE_MASK) {
- ASSERTCMP(pos, <, eof);
- if (eof - pos < PAGE_SIZE) {
- _debug("cut short %llx to %llx",
- pos, eof);
- len = eof - pos;
- ASSERTCMP(pos + len, ==, eof);
- }
- }
-
- data = kmap(page);
- ret = __kernel_write(file, data, len, &pos);
- kunmap(page);
- if (ret != len)
- ret = -EIO;
- fput(file);
+ goto error_2;
}
- if (ret < 0) {
- if (ret == -EIO)
- cachefiles_io_error_obj(
- object, "Write page to backing file failed");
- ret = -ENOBUFS;
+ len = PAGE_SIZE;
+ if (eof & ~PAGE_MASK) {
+ if (eof - pos < PAGE_SIZE) {
+ _debug("cut short %llx to %llx",
+ pos, eof);
+ len = eof - pos;
+ ASSERTCMP(pos + len, ==, eof);
+ }
}
- _leave(" = %d", ret);
- return ret;
+ data = kmap(page);
+ ret = __kernel_write(file, data, len, &pos);
+ kunmap(page);
+ fput(file);
+ if (ret != len)
+ goto error_eio;
+
+ _leave(" = 0");
+ return 0;
+
+error_eio:
+ ret = -EIO;
+error_2:
+ if (ret == -EIO)
+ cachefiles_io_error_obj(object,
+ "Write page to backing file failed");
+error:
+ _leave(" = -ENOBUFS [%d]", ret);
+ return -ENOBUFS;
}
/*
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 5d8f35f1382a..b7fcc0de0b2f 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -271,8 +271,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
dput(dentry);
dentry = ERR_PTR(-EEXIST);
}
- if (IS_ERR(dentry))
+
+ if (IS_ERR(dentry)) {
mutex_unlock(&d_inode(parent)->i_mutex);
+ simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+ }
+
return dentry;
}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 7d1aad1d9313..ea433a7f4bca 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5283,7 +5283,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
!ext4_should_journal_data(inode) &&
!ext4_nonda_switch(inode->i_sb)) {
do {
- ret = __block_page_mkwrite(vma, vmf,
+ ret = block_page_mkwrite(vma, vmf,
ext4_da_get_block_prep);
} while (ret == -ENOSPC &&
ext4_should_retry_alloc(inode->i_sb, &retries));
@@ -5330,7 +5330,7 @@ retry_alloc:
ret = VM_FAULT_SIGBUS;
goto out;
}
- ret = __block_page_mkwrite(vma, vmf, get_block);
+ ret = block_page_mkwrite(vma, vmf, get_block);
if (!ret && ext4_should_journal_data(inode)) {
if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index 6d941f56faf4..9b28649df3a1 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -22,6 +22,7 @@ static LIST_HEAD(fscache_netfs_list);
int __fscache_register_netfs(struct fscache_netfs *netfs)
{
struct fscache_netfs *ptr;
+ struct fscache_cookie *cookie;
int ret;
_enter("{%s}", netfs->name);
@@ -29,29 +30,25 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
INIT_LIST_HEAD(&netfs->link);
/* allocate a cookie for the primary index */
- netfs->primary_index =
- kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL);
+ cookie = kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL);
- if (!netfs->primary_index) {
+ if (!cookie) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
/* initialise the primary index cookie */
- atomic_set(&netfs->primary_index->usage, 1);
- atomic_set(&netfs->primary_index->n_children, 0);
- atomic_set(&netfs->primary_index->n_active, 1);
+ atomic_set(&cookie->usage, 1);
+ atomic_set(&cookie->n_children, 0);
+ atomic_set(&cookie->n_active, 1);
- netfs->primary_index->def = &fscache_fsdef_netfs_def;
- netfs->primary_index->parent = &fscache_fsdef_index;
- netfs->primary_index->netfs_data = netfs;
- netfs->primary_index->flags = 1 << FSCACHE_COOKIE_ENABLED;
+ cookie->def = &fscache_fsdef_netfs_def;
+ cookie->parent = &fscache_fsdef_index;
+ cookie->netfs_data = netfs;
+ cookie->flags = 1 << FSCACHE_COOKIE_ENABLED;
- atomic_inc(&netfs->primary_index->parent->usage);
- atomic_inc(&netfs->primary_index->parent->n_children);
-
- spin_lock_init(&netfs->primary_index->lock);
- INIT_HLIST_HEAD(&netfs->primary_index->backing_objects);
+ spin_lock_init(&cookie->lock);
+ INIT_HLIST_HEAD(&cookie->backing_objects);
/* check the netfs type is not already present */
down_write(&fscache_addremove_sem);
@@ -62,6 +59,10 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
goto already_registered;
}
+ atomic_inc(&cookie->parent->usage);
+ atomic_inc(&cookie->parent->n_children);
+
+ netfs->primary_index = cookie;
list_add(&netfs->link, &fscache_netfs_list);
ret = 0;
@@ -70,11 +71,8 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
already_registered:
up_write(&fscache_addremove_sem);
- if (ret < 0) {
- netfs->primary_index->parent = NULL;
- __fscache_cookie_put(netfs->primary_index);
- netfs->primary_index = NULL;
- }
+ if (ret < 0)
+ kmem_cache_free(fscache_cookie_jar, cookie);
_leave(" = %d", ret);
return ret;
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 79483b3d8c6f..6b35fc4860a0 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -816,7 +816,7 @@ static void fscache_write_op(struct fscache_operation *_op)
goto superseded;
page = results[0];
_debug("gang %d [%lx]", n, page->index);
- if (page->index > op->store_limit) {
+ if (page->index >= op->store_limit) {
fscache_stat(&fscache_n_store_pages_over_limit);
goto superseded;
}
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 54575e3cc1a2..088ba001c6ef 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -109,7 +109,7 @@ static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
goto out;
file_update_time(vma->vm_file);
- ret = __block_page_mkwrite(vma, vmf, nilfs_get_block);
+ ret = block_page_mkwrite(vma, vmf, nilfs_get_block);
if (ret) {
nilfs_transaction_abort(inode->i_sb);
goto out;
diff --git a/fs/pipe.c b/fs/pipe.c
index 8865f7963700..42cf8ddf0e55 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -366,18 +366,17 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
int offset = buf->offset + buf->len;
if (ops->can_merge && offset + chars <= PAGE_SIZE) {
- int error = ops->confirm(pipe, buf);
- if (error)
+ ret = ops->confirm(pipe, buf);
+ if (ret)
goto out;
ret = copy_page_from_iter(buf->page, offset, chars, from);
if (unlikely(ret < chars)) {
- error = -EFAULT;
+ ret = -EFAULT;
goto out;
}
do_wakeup = 1;
- buf->len += chars;
- ret = chars;
+ buf->len += ret;
if (!iov_iter_count(from))
goto out;
}
@@ -693,17 +692,20 @@ int create_pipe_files(struct file **res, int flags)
d_instantiate(path.dentry, inode);
- err = -ENFILE;
f = alloc_file(&path, FMODE_WRITE, &pipefifo_fops);
- if (IS_ERR(f))
+ if (IS_ERR(f)) {
+ err = PTR_ERR(f);
goto err_dentry;
+ }
f->f_flags = O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT));
f->private_data = inode->i_pipe;
res[0] = alloc_file(&path, FMODE_READ, &pipefifo_fops);
- if (IS_ERR(res[0]))
+ if (IS_ERR(res[0])) {
+ err = PTR_ERR(res[0]);
goto err_file;
+ }
path_get(&path);
res[0]->private_data = inode->i_pipe;
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index e78feb400e22..f80e90f95ad8 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1506,7 +1506,7 @@ xfs_filemap_page_mkwrite(
ret = __dax_mkwrite(vma, vmf, xfs_get_blocks_direct,
xfs_end_io_dax_write);
} else {
- ret = __block_page_mkwrite(vma, vmf, xfs_get_blocks);
+ ret = block_page_mkwrite(vma, vmf, xfs_get_blocks);
ret = block_page_mkwrite_return(ret);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.