From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 087821AF0CC for ; Mon, 11 Nov 2024 21:10:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731359410; cv=none; b=YGLPPNPdNzsqKosuQb0vRom+HuH/RiP2rARyyUMKdA4AdtoIBfhgzwUkNMjvZSAXNNrOCQAL0WHD6fB0Y3Rp45ZjH6d8RbH9Fua+7mRktlofnpTca2SrbR5wXgQeIjUBfkp2JsLUMj/rvOQUQgdmFA4hV7V+hAiwVpNwsMScrzQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731359410; c=relaxed/simple; bh=QFDvcNtpxJEHbf7CuNT5T4tRvh1TWnG60rp8ch5j+yI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZPrVM/S69D9klJR+mskbGnnytpdijtoO7ioA9/JerAjzP68h3YF3oXjaHHatR9zgBm+VRvn8yBWNq7Pf0KDoxDK6Bz9YPaGERnRgYsAioRPdD8C/GpvoGn4IsQxWIMeniIFEicb+AQQEllZ5Mg2FKTMjgl8u8hwgb0TOxNrLrxc= ARC-Authentication-Results:i=1; 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AJvYcCVXB4e6vOPhVppUciCt9vTHd0xRc8az3ANsUFLX0t0g7M6Zij6C1WGswjtHyVENAaaHgrm8CgIWASr9l90=@vger.kernel.org X-Gm-Message-State: AOJu0YyzonurDrD/lfrnDnWEkT5KpUqTwbMTTZe5HypOli7E0H6oGTw8 nKx8RC6GvaHklBsiD8j1mjEDOiVELz+upL6Hv0j6gA1p3apAU7Hp5z+KhGbtEo1mf6p49FNTPqk gBAc80em4KkiQTmTlrv0zxkeSojfkMjyqt+aJ6LRXruHwTUPd4eVkFMc= X-Google-Smtp-Source: AGHT+IFb2fMcWfCCLYatwtEn3VhqhT8AOb19iQUqvyj+2pJqM6i2T0jIxQgjHmtdUdS7thXXbd8ULyspnyarS/X/W3SlX4o2CsH1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:170c:b0:3a5:ce8e:a0d9 with SMTP id e9e14a558f8ab-3a6f19ca565mr156103495ab.2.1731359408251; Mon, 11 Nov 2024 13:10:08 -0800 (PST) Date: Mon, 11 Nov 2024 13:10:08 -0800 In-Reply-To: <9be1baa3-d2f4-4e20-9f13-c6c12f0813dc@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <673272b0.050a0220.1fb99c.0159.GAE@google.com> Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in __hfs_ext_cache_extent (2) From: syzbot To: gianf.trad@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.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 __hfs_ext_cache_extent loop0: detected capacity change from 0 to 64 ===================================================== BUG: KMSAN: uninit-value in __hfs_ext_read_extent fs/hfs/extent.c:160 [inline] BUG: KMSAN: uninit-value in __hfs_ext_cache_extent+0x69f/0x7e0 fs/hfs/extent.c:179 __hfs_ext_read_extent fs/hfs/extent.c:160 [inline] __hfs_ext_cache_extent+0x69f/0x7e0 fs/hfs/extent.c:179 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_get_block+0x733/0xf50 fs/hfs/extent.c:366 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2121 block_write_begin fs/buffer.c:2231 [inline] cont_write_begin+0xf82/0x1940 fs/buffer.c:2582 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 cont_expand_zero fs/buffer.c:2509 [inline] cont_write_begin+0x32f/0x1940 fs/buffer.c:2572 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 hfs_file_truncate+0x1a5/0xd30 fs/hfs/extent.c:494 hfs_inode_setattr+0x998/0xab0 fs/hfs/inode.c:654 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 vfs_truncate+0x5d4/0x680 fs/open.c:111 do_sys_truncate+0x104/0x240 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x6c/0xa0 fs/open.c:144 x64_sys_call+0x2ce3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:77 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 created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] hfs_find_init+0x91/0x250 fs/hfs/bfind.c:21 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_get_block+0x68d/0xf50 fs/hfs/extent.c:366 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2121 block_write_begin fs/buffer.c:2231 [inline] cont_write_begin+0xf82/0x1940 fs/buffer.c:2582 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 cont_expand_zero fs/buffer.c:2509 [inline] cont_write_begin+0x32f/0x1940 fs/buffer.c:2572 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 hfs_file_truncate+0x1a5/0xd30 fs/hfs/extent.c:494 hfs_inode_setattr+0x998/0xab0 fs/hfs/inode.c:654 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 vfs_truncate+0x5d4/0x680 fs/open.c:111 do_sys_truncate+0x104/0x240 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x6c/0xa0 fs/open.c:144 x64_sys_call+0x2ce3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:77 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: 6011 Comm: syz.0.15 Not tainted 6.12.0-rc7-syzkaller-g2d5404caa8c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 ===================================================== Tested on: commit: 2d5404ca Linux 6.12-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d3bea7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d2d076474187685 dashboard link: https://syzkaller.appspot.com/bug?extid=d395b0c369e492a17530 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.