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eCryptfs: Fix new inode race condition

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Only unlock and d_add() new inodes after the plaintext inode size has
been read from the lower filesystem. This fixes a race condition that
was sometimes seen during a multi-job kernel build in an eCryptfs mount.

https://bugzilla.kernel.org/show_bug.cgi?id=36002

Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Reported-by: David <david@unsolicited.net>
Tested-by: David <david@unsolicited.net>
This commit is contained in:
Tyler Hicks
2011-05-24 03:49:02 -05:00
parent 5ccf92037c
commit 3b06b3ebf4
5 changed files with 30 additions and 28 deletions
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4
fs/ecryptfs/crypto.c
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@@ -1568,11 +1568,11 @@ out:
}
int ecryptfs_read_and_validate_xattr_region(char *page_virt,
struct dentry *ecryptfs_dentry)
struct inode *inode)
{
int rc;
rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_dentry->d_inode);
rc = ecryptfs_read_xattr_region(page_virt, inode);
if (rc)
goto out;
if (!contains_ecryptfs_marker(page_virt + ECRYPTFS_FILE_SIZE_BYTES)) {