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Date: Mon, 15 Nov 2010 21:28:41 -0600
From: Tyler Hicks <tyhicks@...ux.vnet.ibm.com>
To: Joe Perches <joe@...ches.com>
Cc: linux-kernel@...r.kernel.org,
Dustin Kirkland <kirkland@...onical.com>,
ecryptfs-devel@...ts.launchpad.net
Subject: Re: [PATCH 4/6] fs/ecryptfs: Add printf format/argument
verification and fix fallout
On Wed Nov 10, 2010 at 03:46:16PM -0800, Joe Perches <joe@...ches.com> wrote:
> Add __attribute__((format... to __ecryptfs_printk
> Make formats and arguments match.
> Add casts to (unsigned long long) for %llu.
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
Thanks Joe. I changed a couple minor things, which are noted below and
applied the fix to
git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6.git#next
When compiling the eCryptfs module for an x86_64 kernel, this fix
uncovered several missing 'z' length modifiers for size_t variables. I
fixed those, as well:
http://git.kernel.org/?p=linux/kernel/git/ecryptfs/ecryptfs-2.6.git;a=commit;h=d1fbc23049e13980f22897b0e657345a9c7bcd50
Thanks again for the patch.
Tyler
> fs/ecryptfs/crypto.c | 20 ++++++++++++--------
> fs/ecryptfs/ecryptfs_kernel.h | 1 +
> fs/ecryptfs/file.c | 6 +++---
> fs/ecryptfs/keystore.c | 7 ++++---
> fs/ecryptfs/main.c | 7 ++++---
> fs/ecryptfs/mmap.c | 13 +++++++------
> 6 files changed, 31 insertions(+), 23 deletions(-)
>
> diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
> index cbadc1b..523bcb0 100644
> --- a/fs/ecryptfs/crypto.c
> +++ b/fs/ecryptfs/crypto.c
> @@ -414,8 +414,9 @@ static int ecryptfs_encrypt_extent(struct page *enc_extent_page,
> (extent_base + extent_offset));
> if (rc) {
> ecryptfs_printk(KERN_ERR, "Error attempting to "
> - "derive IV for extent [0x%.16x]; "
> - "rc = [%d]\n", (extent_base + extent_offset),
> + "derive IV for extent [0x%.16llx]; "
> + "rc = [%d]\n",
> + (unsigned long long)(extent_base + extent_offset),
> rc);
> goto out;
> }
> @@ -443,8 +444,9 @@ static int ecryptfs_encrypt_extent(struct page *enc_extent_page,
> }
> rc = 0;
> if (unlikely(ecryptfs_verbosity > 0)) {
> - ecryptfs_printk(KERN_DEBUG, "Encrypt extent [0x%.16x]; "
> - "rc = [%d]\n", (extent_base + extent_offset),
> + ecryptfs_printk(KERN_DEBUG, "Encrypt extent [0x%.16llx]; "
> + "rc = [%d]\n",
> + (unsigned long long)(extent_base + extent_offset),
A handful of these lines reached over 80 columns, so I touched them up
before pushing the patch to my branch.
> rc);
> ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
> "encryption:\n");
> @@ -541,8 +543,9 @@ static int ecryptfs_decrypt_extent(struct page *page,
> (extent_base + extent_offset));
> if (rc) {
> ecryptfs_printk(KERN_ERR, "Error attempting to "
> - "derive IV for extent [0x%.16x]; "
> - "rc = [%d]\n", (extent_base + extent_offset),
> + "derive IV for extent [0x%.16llx]; "
> + "rc = [%d]\n",
> + (unsigned long long)(extent_base + extent_offset),
> rc);
> goto out;
> }
> @@ -571,8 +574,9 @@ static int ecryptfs_decrypt_extent(struct page *page,
> }
> rc = 0;
> if (unlikely(ecryptfs_verbosity > 0)) {
> - ecryptfs_printk(KERN_DEBUG, "Decrypt extent [0x%.16x]; "
> - "rc = [%d]\n", (extent_base + extent_offset),
> + ecryptfs_printk(KERN_DEBUG, "Decrypt extent [0x%.16llx]; "
> + "rc = [%d]\n",
> + (unsigned long long)(extent_base + extent_offset),
> rc);
> ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
> "decryption:\n");
> diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
> index 413a3c4..86c7101 100644
> --- a/fs/ecryptfs/ecryptfs_kernel.h
> +++ b/fs/ecryptfs/ecryptfs_kernel.h
> @@ -584,6 +584,7 @@ ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
>
> #define ecryptfs_printk(type, fmt, arg...) \
> __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
> +__attribute__ ((format(printf, 1, 2)))
> void __ecryptfs_printk(const char *fmt, ...);
>
> extern const struct file_operations ecryptfs_main_fops;
> diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
> index 91da029..d445672 100644
> --- a/fs/ecryptfs/file.c
> +++ b/fs/ecryptfs/file.c
> @@ -243,9 +243,9 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
> }
> }
> mutex_unlock(&crypt_stat->cs_mutex);
> - ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = [0x%.16x] "
> - "size: [0x%.16x]\n", inode, inode->i_ino,
> - i_size_read(inode));
> + ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = [0x%.16lx] "
> + "size: [0x%.16llx]\n", inode, inode->i_ino,
> + (unsigned long long)i_size_read(inode));
> goto out;
> out_free:
> kmem_cache_free(ecryptfs_file_info_cache,
> diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
> index b1f6858..e73f24c 100644
> --- a/fs/ecryptfs/keystore.c
> +++ b/fs/ecryptfs/keystore.c
> @@ -59,7 +59,7 @@ static int process_request_key_err(long err_code)
> break;
> default:
> ecryptfs_printk(KERN_WARNING, "Unknown error code: "
> - "[0x%.16x]\n", err_code);
> + "[0x%.16lx]\n", err_code);
> rc = -EINVAL;
> }
> return rc;
> @@ -1864,8 +1864,9 @@ found_matching_auth_tok:
> "session key for authentication token with sig "
> "[%.*s]; rc = [%d]. Removing auth tok "
> "candidate from the list and searching for "
> - "the next match.\n", candidate_auth_tok_sig,
> - ECRYPTFS_SIG_SIZE_HEX, rc);
> + "the next myouatch.\n",
I also touched up this little typo.
> + ECRYPTFS_SIG_SIZE_HEX, candidate_auth_tok_sig,
> + rc);
> list_for_each_entry_safe(auth_tok_list_item,
> auth_tok_list_item_tmp,
> &auth_tok_list, list) {
> diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
> index a9dbd62..cfe636d 100644
> --- a/fs/ecryptfs/main.c
> +++ b/fs/ecryptfs/main.c
> @@ -828,9 +828,10 @@ static int __init ecryptfs_init(void)
> ecryptfs_printk(KERN_ERR, "The eCryptfs extent size is "
> "larger than the host's page size, and so "
> "eCryptfs cannot run on this system. The "
> - "default eCryptfs extent size is [%d] bytes; "
> - "the page size is [%d] bytes.\n",
> - ECRYPTFS_DEFAULT_EXTENT_SIZE, PAGE_CACHE_SIZE);
> + "default eCryptfs extent size is [%u] bytes; "
> + "the page size is [%lu] bytes.\n",
> + ECRYPTFS_DEFAULT_EXTENT_SIZE,
> + (unsigned long)PAGE_CACHE_SIZE);
> goto out;
> }
> rc = ecryptfs_init_kmem_caches();
> diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
> index b1d8275..667fc79 100644
> --- a/fs/ecryptfs/mmap.c
> +++ b/fs/ecryptfs/mmap.c
> @@ -65,7 +65,7 @@ static int ecryptfs_writepage(struct page *page, struct writeback_control *wbc)
> rc = ecryptfs_encrypt_page(page);
> if (rc) {
> ecryptfs_printk(KERN_WARNING, "Error encrypting "
> - "page (upper index [0x%.16x])\n", page->index);
> + "page (upper index [0x%.16lx])\n", page->index);
> ClearPageUptodate(page);
> goto out;
> }
> @@ -237,7 +237,7 @@ out:
> ClearPageUptodate(page);
> else
> SetPageUptodate(page);
> - ecryptfs_printk(KERN_DEBUG, "Unlocking page with index = [0x%.16x]\n",
> + ecryptfs_printk(KERN_DEBUG, "Unlocking page with index = [0x%.16lx]\n",
> page->index);
> unlock_page(page);
> return rc;
> @@ -488,7 +488,7 @@ static int ecryptfs_write_end(struct file *file,
> } else
> ecryptfs_printk(KERN_DEBUG, "Not a new file\n");
> ecryptfs_printk(KERN_DEBUG, "Calling fill_zeros_to_end_of_page"
> - "(page w/ index = [0x%.16x], to = [%d])\n", index, to);
> + "(page w/ index = [0x%.16lx], to = [%d])\n", index, to);
> if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
> rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, 0,
> to);
> @@ -503,19 +503,20 @@ static int ecryptfs_write_end(struct file *file,
> rc = fill_zeros_to_end_of_page(page, to);
> if (rc) {
> ecryptfs_printk(KERN_WARNING, "Error attempting to fill "
> - "zeros in page with index = [0x%.16x]\n", index);
> + "zeros in page with index = [0x%.16lx]\n", index);
> goto out;
> }
> rc = ecryptfs_encrypt_page(page);
> if (rc) {
> ecryptfs_printk(KERN_WARNING, "Error encrypting page (upper "
> - "index [0x%.16x])\n", index);
> + "index [0x%.16lx])\n", index);
> goto out;
> }
> if (pos + copied > i_size_read(ecryptfs_inode)) {
> i_size_write(ecryptfs_inode, pos + copied);
> ecryptfs_printk(KERN_DEBUG, "Expanded file size to "
> - "[0x%.16x]\n", i_size_read(ecryptfs_inode));
> + "[0x%.16llx]\n",
> + (unsigned long long)i_size_read(ecryptfs_inode));
> }
> rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode);
> if (rc)
> --
> 1.7.3.1.g432b3.dirty
>
--
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