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Wed, 20 Dec 2023 22:11:12 -0800 From: Lizhi Xu To: CC: , Subject: task hung in exfat_write_inode Date: Thu, 21 Dec 2023 14:11:05 +0800 Message-ID: <20231221061105.1471131-1-lizhi.xu@windriver.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000db858c05f06f30b0@google.com> References: <000000000000db858c05f06f30b0@google.com> 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-Proofpoint-ORIG-GUID: vrLq6O2VzX6gyLzBeerr0xQ_kmzRY9Xs X-Proofpoint-GUID: vrLq6O2VzX6gyLzBeerr0xQ_kmzRY9Xs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-16_25,2023-11-16_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 suspectscore=0 bulkscore=0 phishscore=0 mlxlogscore=690 priorityscore=1501 spamscore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312210044 Content-Type: text/plain; charset="utf-8" #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.gi= t f9ff5644bcc0 diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c index 56b870d9cc0d..2908eb82fe68 100644 --- a/fs/exfat/fatent.c +++ b/fs/exfat/fatent.c @@ -149,7 +149,7 @@ static int __exfat_free_cluster(struct inode *inode, st= ruct exfat_chain *p_chain { struct super_block *sb =3D inode->i_sb; struct exfat_sb_info *sbi =3D EXFAT_SB(sb); - int cur_cmap_i, next_cmap_i; + int cur_cmap_i, next_cmap_i, ei =3D 0; unsigned int num_clusters =3D 0; unsigned int clu; =20 @@ -176,8 +176,11 @@ static int __exfat_free_cluster(struct inode *inode, s= truct exfat_chain *p_chain =20 if (p_chain->flags =3D=3D ALLOC_NO_FAT_CHAIN) { unsigned int last_cluster =3D p_chain->dir + p_chain->size - 1; + printk("b dir: %u, s: %u, nc: %u\n", p_chain->dir, p_chain->size, num_cl= usters); do { bool sync =3D false; + if (ei > 100) + break; =20 if (clu < last_cluster) next_cmap_i =3D @@ -192,12 +195,17 @@ static int __exfat_free_cluster(struct inode *inode, = struct exfat_chain *p_chain exfat_clear_bitmap(inode, clu, (sync && IS_DIRSYNC(inode))); clu++; num_clusters++; + ei++; } while (num_clusters < p_chain->size); + printk("e dir: %u, s: %u, nc: %u, e: %d\n", p_chain->dir, p_chain->size,= num_clusters, ei); } else { + printk("b2 dir: %u, s: %u, nc: %u\n", p_chain->dir, p_chain->size, num_c= lusters); do { bool sync =3D false; unsigned int n_clu =3D clu; int err =3D exfat_get_next_cluster(sb, &n_clu); + if (ei > 100) + break; =20 if (err || n_clu =3D=3D EXFAT_EOF_CLUSTER) sync =3D true; @@ -213,10 +221,12 @@ static int __exfat_free_cluster(struct inode *inode, = struct exfat_chain *p_chain exfat_clear_bitmap(inode, clu, (sync && IS_DIRSYNC(inode))); clu =3D n_clu; num_clusters++; + ei++; =20 if (err) goto dec_used_clus; } while (clu !=3D EXFAT_EOF_CLUSTER); + printk("e2 dir: %u, s: %u, nc: %u, e: %d\n", p_chain->dir, p_chain->size= , num_clusters, ei); } =20 dec_used_clus: @@ -229,8 +239,10 @@ int exfat_free_cluster(struct inode *inode, struct exf= at_chain *p_chain) int ret =3D 0; =20 mutex_lock(&EXFAT_SB(inode->i_sb)->bitmap_lock); + printk("i: %p, %s\n", inode, __func__); ret =3D __exfat_free_cluster(inode, p_chain); mutex_unlock(&EXFAT_SB(inode->i_sb)->bitmap_lock); + printk("r: %d, i: %p, %s\n", ret, inode, __func__); =20 return ret; }