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PH7PR12MB7019.namprd12.prod.outlook.com (2603:10b6:510:1b9::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6298.45; Wed, 19 Apr 2023 11:17:21 +0000 Received: from IA1PR12MB6137.namprd12.prod.outlook.com ([fe80::c70e:6be:19fe:36bf]) by IA1PR12MB6137.namprd12.prod.outlook.com ([fe80::c70e:6be:19fe:36bf%6]) with mapi id 15.20.6298.045; Wed, 19 Apr 2023 11:17:21 +0000 Message-ID: Date: Wed, 19 Apr 2023 16:47:08 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Subject: Re: [PATCH] splice: Fix filemap of a blockdev Content-Language: en-US To: David Howells , Jens Axboe Cc: Christoph Hellwig , Al Viro , David Hildenbrand , John Hubbard , Steve French , linux-mm@kvack.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org References: <1770755.1681894451@warthog.procyon.org.uk> From: "Jain, Ayush" In-Reply-To: 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too (in->f_inode points to the device file, which is typically zero size). > > Fixes: 07073eb01c5f ("splice: Add a func to do a splice from a buffered file without ITER_PIPE") > Link: https://lore.kernel.org/r/0c6b661c-f7ff-cf12-b7f0-00b6b2f1317b@amd.com/ > Reported-by: Ayush Jain Tested-by: Ayush Jain > cc: Jens Axboe > cc: Christoph Hellwig > cc: Al Viro > cc: David Hildenbrand > cc: John Hubbard > cc: Steve French > cc: linux-mm@kvack.org > cc: linux-block@vger.kernel.org > cc: linux-fsdevel@vger.kernel.org > --- > mm/filemap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mm/filemap.c b/mm/filemap.c > index 470be06b6096..f86cc8acf33a 100644 > --- a/mm/filemap.c > +++ b/mm/filemap.c > @@ -2902,7 +2902,7 @@ ssize_t filemap_splice_read(struct file *in, loff_t *ppos, > do { > cond_resched(); > > - if (*ppos >= i_size_read(file_inode(in))) > + if (*ppos >= i_size_read(in->f_mapping->host)) > break; > > iocb.ki_pos = *ppos; > @@ -2918,7 +2918,7 @@ ssize_t filemap_splice_read(struct file *in, loff_t *ppos, > * part of the page is not copied back to userspace (unless > * another truncate extends the file - this is desired though). > */ > - isize = i_size_read(file_inode(in)); > + isize = i_size_read(in->f_mapping->host); > if (unlikely(*ppos >= isize)) > break; > end_offset = min_t(loff_t, isize, *ppos + len); > Regards, Ayush Jain