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linux/fs/exfat
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Yuezhang Mo d23f2621fc exfat: fix the infinite loop in __exfat_free_cluster() 
[ Upstream commit a5324b3a48 ]

In __exfat_free_cluster(), the cluster chain is traversed until the
EOF cluster. If the cluster chain includes a loop due to file system
corruption, the EOF cluster cannot be traversed, resulting in an
infinite loop.

This commit uses the total number of clusters to prevent this infinite
loop.

Reported-by: syzbot+1de5a37cb85a2d536330@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=1de5a37cb85a2d536330
Tested-by: syzbot+1de5a37cb85a2d536330@syzkaller.appspotmail.com
Fixes: 31023864e6 ("exfat: add fat entry operations")
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-17 13:34:37 +01:00
..
balloc.c exfat: fix memory leak in exfat_load_bitmap() 2024-10-17 15:21:57 +02:00
cache.c exfat: fix use of uninitialized spinlock on error path 2020-10-07 14:27:13 +09:00
dir.c exfat: fix the infinite loop in exfat_readdir() 2025-01-17 13:34:37 +01:00
exfat_fs.h exfat: support dynamic allocate bh for exfat_entry_set_cache 2024-12-19 18:08:51 +01:00
exfat_raw.h exfat: fix shift-out-of-bounds in exfat_fill_super() 2021-02-22 09:55:13 +09:00
fatent.c exfat: fix the infinite loop in __exfat_free_cluster() 2025-01-17 13:34:37 +01:00
file.c exfat: fix inode->i_blocks for non-512 byte sector size device 2023-03-10 09:34:08 +01:00
inode.c exfat: fix inode->i_blocks for non-512 byte sector size device 2023-03-10 09:34:08 +01:00
Kconfig exfat: Improve wording of EXFAT_DEFAULT_IOCHARSET config option 2020-06-09 16:48:39 +09:00
Makefile exfat: add Kconfig and Makefile 2020-03-05 21:00:40 -05:00
misc.c exfat: Expand exfat_err() and co directly to pr_*() macro 2022-08-01 10:14:07 +09:00
namei.c exfat: fix uninit-value in __exfat_get_dentry_set 2024-12-14 19:54:00 +01:00
nls.c exfat: Drop superfluous new line for error messages 2022-08-01 10:14:07 +09:00
super.c exfat: fix inode->i_blocks for non-512 byte sector size device 2023-03-10 09:34:08 +01:00