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Sat, 13 Apr 2024 19:35:03 -0700 (PDT) Date: Sat, 13 Apr 2024 19:35:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002cd9be0616055ada@google.com> Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in hfs_revalidate_dentry From: syzbot To: linux-kernel@vger.kernel.org, shresthprasad7@gmail.com, 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_revalidate_dentry loop0: detected capacity change from 0 to 64 ===================================================== BUG: KMSAN: uninit-value in hfs_revalidate_dentry+0x30b/0x3f0 fs/hfs/sysdep.c:30 hfs_revalidate_dentry+0x30b/0x3f0 fs/hfs/sysdep.c:30 lookup_fast+0x418/0x8e0 walk_component fs/namei.c:2000 [inline] link_path_walk+0x817/0x1490 fs/namei.c:2331 path_lookupat+0xd9/0x6f0 fs/namei.c:2484 filename_lookup+0x22f/0x750 fs/namei.c:2514 user_path_at_empty+0x8b/0x3a0 fs/namei.c:2921 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3689 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x66b/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0x2de/0x1400 mm/slub.c:2391 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x6d7/0xbe0 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] hfs_alloc_inode+0x5a/0xd0 fs/hfs/super.c:165 alloc_inode+0x86/0x460 fs/inode.c:261 iget_locked+0x2bf/0xee0 fs/inode.c:1280 hfs_btree_open+0x16c/0x1aa0 fs/hfs/btree.c:38 hfs_mdb_get+0x1fe2/0x28b0 fs/hfs/mdb.c:199 hfs_fill_super+0x1cf6/0x23c0 fs/hfs/super.c:406 mount_bdev+0x397/0x520 fs/super.c:1658 hfs_mount+0x4d/0x60 fs/hfs/super.c:456 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 PID: 5493 Comm: syz-executor.0 Not tainted 6.9.0-rc3-syzkaller-00355-g7efd0a74039f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ===================================================== Tested on: commit: 7efd0a74 Merge tag 'ata-6.9-rc4' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1602674d180000 kernel config: https://syzkaller.appspot.com/x/.config?x=807e31f7fd7666b5 dashboard link: https://syzkaller.appspot.com/bug?extid=3ae6be33a50b5aae4dab compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.