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Wed, 14 Dec 2022 01:33:02 -0800 (PST) Received: from kwepemm600015.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4NX96p4LFDzJpKv; Wed, 14 Dec 2022 17:29:22 +0800 (CST) Received: from huawei.com (10.175.101.6) by kwepemm600015.china.huawei.com (7.193.23.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Wed, 14 Dec 2022 17:32:59 +0800 From: ChenXiaoSong To: , , , , CC: , Subject: [PATCH] hfsplus: fix uninit-value in hfsplus_delete_cat() Date: Wed, 14 Dec 2022 18:37:07 +0800 Message-ID: <20221214103707.3893954-1-chenxiaosong2@huawei.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600015.china.huawei.com (7.193.23.52) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1752181474300205253?= X-GMAIL-MSGID: =?utf-8?q?1752181474300205253?= Syzkaller reported BUG as follows: ===================================================== BUG: KMSAN: uninit-value in hfsplus_subfolders_dec fs/hfsplus/catalog.c:248 [inline] BUG: KMSAN: uninit-value in hfsplus_delete_cat+0x1207/0x14d0 fs/hfsplus/catalog.c:419 hfsplus_subfolders_dec fs/hfsplus/catalog.c:248 [inline] hfsplus_delete_cat+0x1207/0x14d0 fs/hfsplus/catalog.c:419 hfsplus_rmdir+0x141/0x3d0 fs/hfsplus/dir.c:425 hfsplus_rename+0x102/0x2e0 fs/hfsplus/dir.c:545 vfs_rename+0x1e4c/0x2800 fs/namei.c:4779 do_renameat2+0x173d/0x1dc0 fs/namei.c:4930 __do_sys_renameat2 fs/namei.c:4963 [inline] __se_sys_renameat2 fs/namei.c:4960 [inline] __ia32_sys_renameat2+0x14b/0x1f0 fs/namei.c:4960 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was stored to memory at: hfsplus_subfolders_inc fs/hfsplus/catalog.c:232 [inline] hfsplus_create_cat+0x19e3/0x19f0 fs/hfsplus/catalog.c:314 hfsplus_mknod+0x1fd/0x560 fs/hfsplus/dir.c:494 hfsplus_mkdir+0x54/0x60 fs/hfsplus/dir.c:529 vfs_mkdir+0x62a/0x870 fs/namei.c:4036 do_mkdirat+0x466/0x7b0 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __ia32_sys_mkdirat+0xc4/0x120 fs/namei.c:4074 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: __alloc_pages+0x9f1/0xe80 mm/page_alloc.c:5581 alloc_pages+0xaae/0xd80 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1794 [inline] allocate_slab+0x1b5/0x1010 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x10c3/0x2d60 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x6f3/0xb30 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3125 [inline] hfsplus_alloc_inode+0x56/0xc0 fs/hfsplus/super.c:627 alloc_inode+0x83/0x440 fs/inode.c:259 iget_locked+0x2a1/0xe20 fs/inode.c:1286 hfsplus_iget+0x5f/0xb60 fs/hfsplus/super.c:64 hfsplus_btree_open+0x13b/0x1cf0 fs/hfsplus/btree.c:150 hfsplus_fill_super+0x12b0/0x2a80 fs/hfsplus/super.c:473 mount_bdev+0x508/0x840 fs/super.c:1401 hfsplus_mount+0x49/0x60 fs/hfsplus/super.c:641 legacy_get_tree+0x10c/0x280 fs/fs_context.c:610 vfs_get_tree+0xa1/0x500 fs/super.c:1531 do_new_mount+0x694/0x1580 fs/namespace.c:3040 path_mount+0x71a/0x1eb0 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x734/0x840 fs/namespace.c:3568 __ia32_sys_mount+0xdf/0x140 fs/namespace.c:3568 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 ===================================================== Fix this by initializing 'subfolders' of 'struct hfsplus_inode_info' in hfsplus_iget(). Link: https://syzkaller.appspot.com/bug?id=981f82f21b973f2f5663dfea581ff8cee1ddfef2 Signed-off-by: ChenXiaoSong Reviewed-by: Viacheslav Dubeyko --- fs/hfsplus/super.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index 122ed89ebf9f..612c07857667 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -72,6 +72,7 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) mutex_init(&HFSPLUS_I(inode)->extents_lock); HFSPLUS_I(inode)->flags = 0; HFSPLUS_I(inode)->extent_state = 0; + HFSPLUS_I(inode)->subfolders = 0; HFSPLUS_I(inode)->rsrc_inode = NULL; atomic_set(&HFSPLUS_I(inode)->opencnt, 0);