The following commit has been merged in the linux branch: commit f60311d5f7670d9539b424e4ed8b5c0872fc9e83 Author: Anand V. Avati avati@gluster.com Date: Thu Oct 22 06:24:52 2009 -0700
fuse: prevent fuse_put_request on invalid pointer
fuse_direct_io() has a loop where requests are allocated in each iteration. if allocation fails, the loop is broken out and follows into an unconditional fuse_put_request() on that invalid pointer.
Signed-off-by: Anand V. Avati avati@gluster.com Signed-off-by: Miklos Szeredi mszeredi@suse.cz Cc: stable@kernel.org
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index a3492f7..5887a63 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1063,7 +1063,8 @@ ssize_t fuse_direct_io(struct file *file, const char __user *buf, break; } } - fuse_put_request(fc, req); + if (!IS_ERR(req)) + fuse_put_request(fc, req); if (res > 0) *ppos = pos;