From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41BF529AF for ; Sat, 19 Oct 2024 05:20:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729315205; cv=none; b=dd0pFCUvwUwUs91g6mDLyxab0+quelPcm4CMqwbDF5yH9GUT9x/UzDdL8M+Md0qkf6Cz7zjJ+FGz2zZqFkkxDjQOdfiYkIGXyu5Ea+f3flByn6ly9+m6pMD5e1Xs+RqWWxI6k4HU+YHcnFtrugbWHtOaErQsDe4xSCIJCGKT82U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729315205; c=relaxed/simple; bh=fyuvITcQCsYlvsn8rW8Eakh+VpT6R3gvHiTF9T8hfYo=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=CAJPfcLESPdCflyWfvGhhV/U1wp8mCoUlHZ5HK9tJu/fr5Fg+rb5tGDTEp4Qj2OevXclrXZ+8BRR9eBwLhuRqG7IYjsziNWFPA7FxRMnPbqiHQXlahQ+V6ruEvZ4kG+vEClNcMm0M+u1eK+My75Nz8nisbHYweUBGoRaM27jwwc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-3a3cd35858aso26053075ab.1 for ; Fri, 18 Oct 2024 22:20:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729315202; x=1729920002; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QlxeE9Vr5F5vKty6EBmDxdWCPl9yGNSG5XRCNC14GcM=; b=b99s5XkVh47f7g0QCCrg5H+YyyJSU0VpS9VlUK8geLgDd01KrxUMyZh3p4Q/640x8Y C+SgDpP/3neocUrn5kkwMn3VeEIV/RELZt+EMbOwi05ryu165kMf7w3MShXaM5RTK0NF xGArQXZ2TolKghqgFS9jKo4WPSZ5qbo4b5C5h/IUd1lUl3dve8BzumEzv2uszCjsw6LN 5Gb1XWE+U4n5QLaB+KkuuIfbxboYTHJl250QoX/AXkE5VRPR8kwuvhG5LaQbH4f6v9ES IUFgEbc5mr/gY1tfp2O9eumunEDOAMn/p/A0VxHBN5+ByHbAbWjXcZWXCTrCyQ2kZuRG epSA== X-Forwarded-Encrypted: i=1; AJvYcCVMueA00UkkZrDEApTMjgTGlmq9pPWXT5IhI1tSpvKjsAiMye79F6uC5tt5gDjvlY2BZHR1KQasvFGHxjos@vger.kernel.org X-Gm-Message-State: AOJu0Yzxi0n3GeagsoLXZDKu6yMMi40/OuB1Ht6Cr6Yyj+yduI5WPe4a 4tGrjz9XmJPObte5aZ0hiLOBVPoTvGZ47fXEi7rghwXIpe1l3zSZ2tqXU0DdE8j7vyGF4tOulwF HnXj5t7FAE0qs6VmgwNivpVO2pFBSjbqws5tagzvRkjIVMSyonEyabvk= X-Google-Smtp-Source: AGHT+IHDOX9xUrAoICrzmF/Qx6PZYlpzPgB1YaSRu2i/o/0q9TaHs9HEUIrz2vTjGWZwjvKqmpon7Rqp5xkZp+Daj33zTRKQXERK Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c54e:0:b0:3a0:a80a:997c with SMTP id e9e14a558f8ab-3a3f40ab41dmr36985375ab.19.1729315202208; Fri, 18 Oct 2024 22:20:02 -0700 (PDT) Date: Fri, 18 Oct 2024 22:20:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67134182.050a0220.34b26a.0000.GAE@google.com> Subject: Re: [syzbot] [exfat?] KMSAN: uninit-value in __exfat_get_dentry_set From: syzbot To: linkinjeon@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, yuezhang.mo@sony.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in __exfat_get_dentry_set loop0: detected capacity change from 0 to 256 exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : 0x726052d3, utbl_chksum : 0xe619d30d) ===================================================== BUG: KMSAN: uninit-value in __exfat_get_dentry_set+0x10ca/0x1500 fs/exfat/dir.c:810 __exfat_get_dentry_set+0x10ca/0x1500 fs/exfat/dir.c:810 exfat_get_dentry_set+0x57/0xf60 fs/exfat/dir.c:865 __exfat_write_inode+0x3c1/0xe30 fs/exfat/inode.c:46 __exfat_truncate+0x7f3/0xbb0 fs/exfat/file.c:211 exfat_truncate+0xee/0x2a0 fs/exfat/file.c:257 exfat_write_failed fs/exfat/inode.c:421 [inline] exfat_direct_IO+0x5a3/0x900 fs/exfat/inode.c:485 generic_file_direct_write+0x275/0x6a0 mm/filemap.c:3977 __generic_file_write_iter+0x242/0x460 mm/filemap.c:4141 exfat_file_write_iter+0x894/0xfb0 fs/exfat/file.c:598 do_iter_readv_writev+0x88a/0xa30 vfs_writev+0x56a/0x14f0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215 __x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215 x64_sys_call+0x2edb/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:329 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: memcpy_to_iter lib/iov_iter.c:65 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0xe53/0x2b30 lib/iov_iter.c:185 copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362 shmem_file_read_iter+0xa09/0x12b0 mm/shmem.c:3162 do_iter_readv_writev+0x88a/0xa30 vfs_iter_read+0x278/0x760 fs/read_write.c:923 lo_read_simple drivers/block/loop.c:283 [inline] do_req_filebacked drivers/block/loop.c:516 [inline] loop_handle_cmd drivers/block/loop.c:1910 [inline] loop_process_work+0x20fc/0x3750 drivers/block/loop.c:1945 loop_workfn+0x48/0x60 drivers/block/loop.c:1969 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x12b7/0x3100 lib/iov_iter.c:481 copy_folio_from_iter_atomic include/linux/uio.h:201 [inline] generic_perform_write+0x8d1/0x1080 mm/filemap.c:4066 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3216 do_iter_readv_writev+0x88a/0xa30 vfs_iter_write+0x44d/0xd40 fs/read_write.c:988 lo_write_bvec drivers/block/loop.c:243 [inline] lo_write_simple drivers/block/loop.c:264 [inline] do_req_filebacked drivers/block/loop.c:511 [inline] loop_handle_cmd drivers/block/loop.c:1910 [inline] loop_process_work+0x15e6/0x3750 drivers/block/loop.c:1945 loop_workfn+0x48/0x60 drivers/block/loop.c:1969 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4756 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof mm/mempolicy.c:2345 [inline] folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010 __filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952 block_write_begin+0x6e/0x2b0 fs/buffer.c:2226 exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434 exfat_extend_valid_size fs/exfat/file.c:553 [inline] exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588 do_iter_readv_writev+0x88a/0xa30 vfs_writev+0x56a/0x14f0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215 __x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215 x64_sys_call+0x2edb/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:329 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 6003 Comm: syz.0.15 Not tainted 6.12.0-rc3-syzkaller-g3d5ad2d4eca3-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== Tested on: commit: 3d5ad2d4 Merge tag 'bpf-fixes' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16155240580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5242e0e980477c72 dashboard link: https://syzkaller.appspot.com/bug?extid=01218003be74b5e1213a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=142fbc5f980000