Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

cachefiles: Handle readpage error correctly

Browse source 
commit 9480b4e75b7108ee68ecf5bc6b4bd68e8031c521 upstream.

If ->readpage returns an error, it has already unlocked the page.

Fixes: 5e929b33c3 ("CacheFiles: Handle truncate unlocking the page we're reading")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-10-26 09:12:10 +00:00 committed by Greg Kroah-Hartman
parent 87ae788195
commit 9f14e20c0e
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
fs/cachefiles/rdwr.c
View file

@ -125,7 +125,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
_debug("reissue read");
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
goto unlock_discard;
goto discard;
}
/* but the page may have been read before the monitor was installed, so
@ -142,6 +142,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
unlock_discard:
unlock_page(backpage);
discard:
spin_lock_irq(&object->work_lock);
list_del(&monitor->op_link);
spin_unlock_irq(&object->work_lock);