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| author |   David Howells <dhowells@redhat.com> | 2020-10-22 14:03:03 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-10-29 13:53:04 +0000 |
| commit | 21db2cdc667f744691a407105b7712bc18d74023 (patch) | |
| tree | b8a9250f00d11d0d28dc7a50e9ca5bcfbbbd56c1 | |
| parent | afs: Fix to take ref on page when PG_private is set (diff) | |
| download | wireguard-linux-21db2cdc667f744691a407105b7712bc18d74023.tar.xz wireguard-linux-21db2cdc667f744691a407105b7712bc18d74023.zip | |
afs: Fix page leak on afs_write_begin() failure
Fix the leak of the target page in afs_write_begin() when it fails.
Fixes: 15b4650e55e0 ("afs: convert to new aops")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Nick Piggin <npiggin@gmail.com>
| -rw-r--r-- | fs/afs/write.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c index 02facb19a0f1..7fae9f8b38eb 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -76,7 +76,7 @@ static int afs_fill_page(struct afs_vnode *vnode, struct key *key, */ int afs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) + struct page **_page, void **fsdata) { struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); struct page *page; @@ -110,9 +110,6 @@ int afs_write_begin(struct file *file, struct address_space *mapping, SetPageUptodate(page); } - /* page won't leak in error case: it eventually gets cleaned off LRU */ - *pagep = page; - try_again: /* See if this page is already partially written in a way that we can * merge the new write with. @@ -155,6 +152,7 @@ try_again: set_page_private(page, priv); else attach_page_private(page, (void *)priv); + *_page = page; _leave(" = 0"); return 0; @@ -164,17 +162,18 @@ try_again: flush_conflicting_write: _debug("flush conflict"); ret = write_one_page(page); - if (ret < 0) { - _leave(" = %d", ret); - return ret; - } + if (ret < 0) + goto error; ret = lock_page_killable(page); - if (ret < 0) { - _leave(" = %d", ret); - return ret; - } + if (ret < 0) + goto error; goto try_again; + +error: + put_page(page); + _leave(" = %d", ret); + return ret; } /* |