From nobody Sun Feb 8 18:33:08 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57C82BA38; Tue, 4 Mar 2025 04:03:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741061031; cv=none; b=rVbi6GXxYcCLSirnJm4zwoVZppva5VSZJ0RTeQrSJ1SCsnuVJi4gYnoPRxnsLXcMubpRJtn0BacHY/5L2OMSsP37E2tS2MzbFfgBDf6tzl6IHHQ2Jt1Z2xEK+vC4pWXlxjoaY0Wg2ZtlCRhdZ2nnnaSlkL3EL0GQuJRpHufkdeA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741061031; c=relaxed/simple; bh=L+DcmApLOKfTDlb+sBGuWJsudO3OdyQhKhrYJdRIBcw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=r2SY5rW/rUBS1noPZEmtctdVb1NmJWXT6dbp+VQS3Z0oJdJZEQHPqliaL0PA38xNMUBJBTpu6VnapGST3CSka8Of7Px93p/xh5v/r/TLeqQGm4aBote0Zsd83chrVLgBlu3DW4TZU4QDBc3DA6kf9/Bx+U/MWneXa9beQLQP4ZM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [124.16.141.245]) by APP-01 (Coremail) with SMTP id qwCowAB3f2+Pe8ZnQL06Eg--.36838S2; Tue, 04 Mar 2025 12:03:29 +0800 (CST) From: Wentao Liang To: kent.overstreet@linux.dev Cc: linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, Wentao Liang Subject: [PATCH] bcachefs: Add error handling for bch2_folio() Date: Tue, 4 Mar 2025 12:03:11 +0800 Message-ID: <20250304040311.2081-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.42.0.windows.2 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-CM-TRANSID: qwCowAB3f2+Pe8ZnQL06Eg--.36838S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF1kAr4Uur1UArWkAw4xZwb_yoW3Wwb_W3 WrJa1UWw4fKFyUtr17ZFW7ZrZ0v34Fyr4S9F48KF47ua4kt34ftws0yr1UZ3yI9rWrGa98 KFyYvr95ArW7CjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbwAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1l42xK82IYc2Ij64vI r41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8Gjc xK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0 cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E 14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x0JUywZ7UUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAgLA2fGYfVh0gAAsK Content-Type: text/plain; charset="utf-8" Add error handling for the case where bch2_folio() returns NULL in __bch2_folio_set(). Return immediately to prevent null pointer dereference. Signed-off-by: Wentao Liang --- fs/bcachefs/fs-io-pagecache.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/bcachefs/fs-io-pagecache.c b/fs/bcachefs/fs-io-pagecache.c index e072900e6a5b..1dc65fef3ff4 100644 --- a/fs/bcachefs/fs-io-pagecache.c +++ b/fs/bcachefs/fs-io-pagecache.c @@ -159,6 +159,9 @@ static void __bch2_folio_set(struct folio *folio, struct bch_folio *s =3D bch2_folio(folio); unsigned i, sectors =3D folio_sectors(folio); =20 + if (!s) + return; + BUG_ON(pg_offset >=3D sectors); BUG_ON(pg_offset + pg_len > sectors); =20 --=20 2.42.0.windows.2