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AFNElJ8Q1K3OvLVeiiONJlU1n3ihmDK6BOg7HaJxsCTWTOs5xPnU4rugWA8aVgapuI4eBMa0PiBOWzy6/Vb7eJc=@vger.kernel.org X-Gm-Message-State: AOJu0YwhoQhQa6HMsbM0FV6wtVV888I6tVtzWMzef3WWqUG+9UtvESSr cysuvaD16CFTLh49FfgdnZ6SZJYbHIRiJaj572tsUO6/biy2tw1IATrD47JCHbwLk++CO4XTX0S Tqnr/rkdNjTa6HW+8tdQm5EP3s7OrNtwduxPUvs7vYCL2+hzY0tQjwAMy6F8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:308d:b0:692:9993:3fad with SMTP id 006d021491bc7-692999347b6mr1424088eaf.64.1776208848133; Tue, 14 Apr 2026 16:20:48 -0700 (PDT) Date: Tue, 14 Apr 2026 16:20:48 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69decbd0.a00a0220.468cb.006b.GAE@google.com> Subject: [syzbot] [hfs?] KMSAN: uninit-value in hfsplus_bnode_find From: syzbot To: frank.li@vivo.com, glaubitz@physik.fu-berlin.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, slava@dubeyko.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d60bc1401583 Merge tag 'pwrseq-updates-for-v7.1-rc1' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16cbe8ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6b03ae1ea24aea48 dashboard link: https://syzkaller.appspot.com/bug?extid=217eb327242d08197efb compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13fe84ce580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11d5feba580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0751271be83e/disk-d60bc140.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f53e11b04b29/vmlinux-d60bc140.xz kernel image: https://storage.googleapis.com/syzbot-assets/4c57f9a8e1f1/bzImage-d60bc140.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/438dc293e7d9/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+217eb327242d08197efb@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 1024 hfsplus: requested invalid offset: NODE: id 0, type 0x1, height 0, node_size 1, offset 4294967295 ===================================================== BUG: KMSAN: uninit-value in hfsplus_bnode_find+0x141c/0x1600 fs/hfsplus/bnode.c:584 hfsplus_bnode_find+0x141c/0x1600 fs/hfsplus/bnode.c:584 hfsplus_btree_open+0x169a/0x1e40 fs/hfsplus/btree.c:382 hfsplus_fill_super+0x111f/0x2770 fs/hfsplus/super.c:553 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:709 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x885/0x1dd0 fs/namespace.c:3839 path_mount+0x7a2/0x20b0 fs/namespace.c:4159 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338 x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable data.i created at: hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:58 [inline] hfsplus_bnode_find+0xd6f/0x1600 fs/hfsplus/bnode.c:583 hfsplus_btree_open+0x169a/0x1e40 fs/hfsplus/btree.c:382 CPU: 0 UID: 0 PID: 6044 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup