From nobody Sat Jul 25 18:01:02 2026 Received: from smtpbg150.qq.com (smtpbg150.qq.com [18.132.163.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DF8CA248F72 for ; Wed, 15 Jul 2026 02:10:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.132.163.193 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784081453; cv=none; b=EzReNjsB4SzvgdsZaN2WO02DfZc446GWPWHw89dZtdX+slOFUZmjbqN1AAaUjoyJ35KibsI1roQ5BgYpA521Pnqar5fsU2FRG4We5Tg4vNaTRd0yfMXn2YBDcP6B3jwZmP3hsh5ntvt9CKzcScyQ37Cgg3fmqGvNiXcvni72lwk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784081453; c=relaxed/simple; bh=6JKIokJrnI/pGAk0qw4S2z3nldE/zgvKFO+WgU8Pz4M=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=dFzaW7Pn3H/Jnlyh3n7b1sAA7JHjOWEG/T1sSYSZP7JZhx63UYnXJiYeVwSnQGzPimUMKnfUfB/m+cX2ojpopXtsTmiLbRHuVaYnJibjiBdCxM8RC0FpnSuw0L6vYe8ub0/0T+AXFlwRdfIJ5xDzKi7faWaOQPbNSaTtKeXy3+A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=dqagZymj; arc=none smtp.client-ip=18.132.163.193 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="dqagZymj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1784081418; bh=Wlh3Ixtw9AWQYPHDEeBb8A0ydAzzDZ9DSrOGHcbFt/Y=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=dqagZymjJGDa9jFLoavdO6WslTr3mhVGs5jyMxaipYckjsXN1dxbC7hyrJs8rTlLd sJFfOtb2IX9lDBpvXXN3yGjWfjQShI9fsLyBKbXHF3eb4xUWm/2cKkeK0UhIKh2ktE koqzVF6avKu3mcKQ2fRAWoxxmDJgGSV9pib32b28= X-QQ-mid: esmtpgz15t1784081401tdc5331c6 X-QQ-Originating-IP: /rSAlzy84/sMSCZroOJYQzUDOigiLb6+8oeap7O/44I= Received: from uniontech.com ( [113.57.152.160]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 15 Jul 2026 10:09:59 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 14819156640265819462 EX-QQ-RecipientCnt: 7 From: Yichong Chen To: OGAWA Hirofumi Cc: Andrew Morton , Ravishankar N , Amit Sahrawat , Namjae Jeon , linux-kernel@vger.kernel.org, Yichong Chen Subject: [PATCH] fat: release buffer head after rebuilding parent Date: Wed, 15 Jul 2026 10:09:57 +0800 Message-Id: <20260715020957.1096309-1-chenyichong@uniontech.com> X-Mailer: git-send-email 2.20.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-QQ-SENDSIZE: 520 Feedback-ID: esmtpgz:uniontech.com:qybglogicsvrgz:qybglogicsvrgz3a-0 X-QQ-XMAILINFO: MRPQukou9wBmqSq5DirvuPmIE5n3XmBNDvddDg5ESkXOZZKB6IHAO1Pa B8GwYeUpVAVGaX6kX0TQ70uR0I2fAv1dKhPcju2i3m6bohd+vSXtSCaXZKrFxzljs3yqDKo KW4jsa6OXYWK5leIVoz0jPmR1idVD1gI0xy8BdjkoF3aSBOxhB3QpV+IzlOivkA+gUkrT13 hNRbF7E3GTmk46Yd6dgAOzcj9rMCCfO+13EoHwMuKK9bdAvkqTVr6lu17cVusKTFi7RlVAY 1pURwvFbUFhmG211jjGYv3oYPnNERNAGE5DQo7hGLPhKwNHWCXFpTMpVBB/ePbLVCbBvZEJ mwlHHmQYxq/VAtKMlZcErvFLNKH76qmINjR2IH3S9b9U3v9yLBrSfSDn/p6HQWlbyHZldw9 uoMuGsn3M9Ebl5DQvRBpedAi+CDOP7+gPTLCzaXZpgP36PTf0wZ0/gzm/e62Sy9ddaU6glp i5AFMbigD87d5e7boQK7BureXWSe3myyKPTIChSxl/EqKSb48iVU00d4bBS7+jz13OePKEN 9VkUqWRvNY0jirzRpWJCx81v4p7T+vFsW4kVWTd5/r2uMYXecmqtdshEymwpOJ9EdFH/VrA 8rWKlMfLYuhcWoW5KnsnbUSa3NyzKOx62uLvAz5C4jPaE8kKZtS2JvYhJB34WJzdseVhvK5 MnJBPUaBY6JZqJB4k6eszi31dOsj/KfiGuqR4I3C1w4qsMXSvm3Oi6tudpWiaMRejTmLiWQ +RDiq9GLKRE2CPgvXCuTsVzqo51+4qzeJivCmxCOpF3oCGbF3flRvSz+/BRfs8WNjfhYK0x g7Homrf2ypNO4iLk6GJefl3F0kD9oG7d+IxP3Va1doujeSw935C22DVx7YaIomRAs0Bn5ly oABfU2h/GEkqCLaHhw61tO4DK9jhD+FDkvzp2c6BVo/bRHT9ANM/UuwLaIcbmocSiRSneV0 K539XTUl0AhtewqmRbjxdD/mHxCUeAy3wWTdlifxUPHpJ5zYgumyqZZ3rB1zGSbZ0CejtAw EoMU8SLCJq70fc5G9Wv2QmhJerV+04+s2O4wnf/A== X-QQ-XMRINFO: NS+P29fieYNwqS3WCnRCOn9D1NpZuCnCRA== X-QQ-RECHKSPAM: 0 Content-Type: text/plain; charset="utf-8" fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data. Fixes: f1e6fb0ab451 ("fat (exportfs): rebuild directory-inode if fat_dget()= ") Signed-off-by: Yichong Chen Acked-by: OGAWA Hirofumi --- fs/fat/nfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/fat/nfs.c b/fs/fat/nfs.c index 509eea9..6e1b371 100644 --- a/fs/fat/nfs.c +++ b/fs/fat/nfs.c @@ -250,8 +250,10 @@ struct inode *fat_rebuild_parent(struct super_block *s= b, int parent_logstart) MSDOS_I(dummy_grand_parent)->i_pos =3D -1; } =20 - if (!fat_scan_logstart(dummy_grand_parent, clus_to_match, &sinfo)) + if (!fat_scan_logstart(dummy_grand_parent, clus_to_match, &sinfo)) { parent =3D fat_build_inode(sb, sinfo.de, sinfo.i_pos); + brelse(sinfo.bh); + } =20 brelse(parent_bh); iput(dummy_grand_parent); --=20 2.51.0