diff options
| author | Konstantin Khlebnikov <koct9i@gmail.com> | 2014-08-07 03:06:32 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-07 05:01:18 +0400 |
| commit | 66ee4b8887ec5ce04bae3e840d206db7b7ad34d1 (patch) | |
| tree | ca202430d326aaca6ad5f11e7296ccf1956aa961 /mm | |
| parent | ef6b571fb8920d5006349a6e29ac47c4817e9691 (diff) | |
| download | linux-66ee4b8887ec5ce04bae3e840d206db7b7ad34d1.tar.xz | |
shmem: fix double uncharge in __shmem_file_setup()
If __shmem_file_setup() fails on struct file allocation it uncharges
memory commitment twice: first by shmem_unacct_size() and second time
implicitly in shmem_evict_inode() when it kills the newly created inode.
This patch removes shmem_unacct_size() from error path if the inode was
already there.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/shmem.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index af68b15a8fc1..3609d31ad0dd 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2932,16 +2932,16 @@ static struct file *__shmem_file_setup(const char *name, loff_t size, this.len = strlen(name); this.hash = 0; /* will go */ sb = shm_mnt->mnt_sb; + path.mnt = mntget(shm_mnt); path.dentry = d_alloc_pseudo(sb, &this); if (!path.dentry) goto put_memory; d_set_d_op(path.dentry, &anon_ops); - path.mnt = mntget(shm_mnt); res = ERR_PTR(-ENOSPC); inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags); if (!inode) - goto put_dentry; + goto put_memory; inode->i_flags |= i_flags; d_instantiate(path.dentry, inode); @@ -2949,19 +2949,19 @@ static struct file *__shmem_file_setup(const char *name, loff_t size, clear_nlink(inode); /* It is unlinked */ res = ERR_PTR(ramfs_nommu_expand_for_mapping(inode, size)); if (IS_ERR(res)) - goto put_dentry; + goto put_path; res = alloc_file(&path, FMODE_WRITE | FMODE_READ, &shmem_file_operations); if (IS_ERR(res)) - goto put_dentry; + goto put_path; return res; -put_dentry: - path_put(&path); put_memory: shmem_unacct_size(flags, size); +put_path: + path_put(&path); return res; } |