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AJvYcCXyo09N4abueaCfXjGpsN3KURWD2QNqvVSbyjhLavA3WiDsVSZgGAhhHRqQxNOFF0HCR/qRlSz9ZvjEIww=@vger.kernel.org X-Gm-Message-State: AOJu0YzpyVa79xYwDCrWPOyuUPGC/XT2b7cek4/M5/PeEvCcTCpinP/2 slJgXWvVCZdqLBJ0SwMp9q+/B69kJAeECyyz3UK4l5ONupEfLCBhLYqEF1tH4D40WSnhuFY2/vJ CvyxDl9CIjbS18N+iQiS1ae6/zQ+nE4cMxng3zIGUgOkwktsQ2HBxurSxifM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1985:b0:65b:8574:2e86 with SMTP id 006d021491bc7-6611796c1d3mr4842232eaf.31.1768858472137; Mon, 19 Jan 2026 13:34:32 -0800 (PST) Date: Mon, 19 Jan 2026 13:34:32 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696ea368.a70a0220.34546f.04b7.GAE@google.com> Subject: [syzbot] [hfs?] KMSAN: uninit-value in hfsplus_strcasecmp (2) 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: 603c05a1639f Merge tag 'nfs-for-6.19-2' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=178b339a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=46b5f80a6e7aaa5c dashboard link: https://syzkaller.appspot.com/bug?extid=d80abb5b890d39261e72 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=157be39a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12625a3a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f5064e5f9c76/disk-603c05a1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c466bcf334e3/vmlinux-603c05a1.xz kernel image: https://storage.googleapis.com/syzbot-assets/4e1318b36fb1/bzImage-603c05a1.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/a0364f040b52/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d80abb5b890d39261e72@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 1024 ===================================================== BUG: KMSAN: uninit-value in case_fold fs/hfsplus/unicode.c:26 [inline] BUG: KMSAN: uninit-value in hfsplus_strcasecmp+0x63a/0x980 fs/hfsplus/unicode.c:67 case_fold fs/hfsplus/unicode.c:26 [inline] hfsplus_strcasecmp+0x63a/0x980 fs/hfsplus/unicode.c:67 hfsplus_cat_case_cmp_key+0xb9/0x190 fs/hfsplus/catalog.c:26 hfs_find_rec_by_key+0xae/0x240 fs/hfsplus/bfind.c:89 __hfsplus_brec_find+0x274/0x840 fs/hfsplus/bfind.c:124 hfsplus_brec_find+0x4ec/0xa10 fs/hfsplus/bfind.c:190 hfsplus_find_cat+0x3b0/0x4f0 fs/hfsplus/catalog.c:220 hfsplus_iget+0x815/0xc30 fs/hfsplus/super.c:96 hfsplus_fill_super+0x1550/0x2580 fs/hfsplus/super.c:548 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1691 get_tree_bdev+0x38/0x50 fs/super.c:1714 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:680 vfs_get_tree+0xb3/0x5c0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x879/0x1700 fs/namespace.c:3712 path_mount+0x749/0x1fb0 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x6f7/0x7e0 fs/namespace.c:4201 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4201 x64_sys_call+0x38cb/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: hfsplus_cat_build_key_uni fs/hfsplus/catalog.c:77 [inline] hfsplus_find_cat+0x356/0x4f0 fs/hfsplus/catalog.c:217 hfsplus_iget+0x815/0xc30 fs/hfsplus/super.c:96 hfsplus_fill_super+0x1550/0x2580 fs/hfsplus/super.c:548 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1691 get_tree_bdev+0x38/0x50 fs/super.c:1714 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:680 vfs_get_tree+0xb3/0x5c0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x879/0x1700 fs/namespace.c:3712 path_mount+0x749/0x1fb0 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x6f7/0x7e0 fs/namespace.c:4201 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4201 x64_sys_call+0x38cb/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable tmp created at: hfsplus_find_cat+0x43/0x4f0 fs/hfsplus/catalog.c:197 hfsplus_iget+0x815/0xc30 fs/hfsplus/super.c:96 CPU: 1 UID: 0 PID: 6037 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ===================================================== --- 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