syzbot has found a reproducer for the following issue on: HEAD commit: 861deac3b092 Linux 6.7-rc7 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=121f1609e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0c7078a6b901aa3 dashboard link: https://syzkaller.appspot.com/bug?extid=b3b14fb9f8a14c5d0267 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10557e81e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14206fd6e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0ea60ee8ed32/disk-861deac3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6d69fdc33021/vmlinux-861deac3.xz kernel image: https://storage.googleapis.com/syzbot-assets/f0158750d452/bzImage-861deac3.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/445a7c3f980d/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b3b14fb9f8a14c5d0267@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ===================================================== BUG: KMSAN: uninit-value in comp_keys fs/reiserfs/stree.c:83 [inline] BUG: KMSAN: uninit-value in bin_search fs/reiserfs/stree.c:173 [inline] BUG: KMSAN: uninit-value in search_by_key+0x3293/0x6780 fs/reiserfs/stree.c:770 comp_keys fs/reiserfs/stree.c:83 [inline] bin_search fs/reiserfs/stree.c:173 [inline] search_by_key+0x3293/0x6780 fs/reiserfs/stree.c:770 reiserfs_delete_solid_item+0x4ec/0xe90 fs/reiserfs/stree.c:1419 remove_save_link+0x2ed/0x420 fs/reiserfs/super.c:540 reiserfs_truncate_file+0xd00/0x1b70 fs/reiserfs/inode.c:2314 reiserfs_setattr+0x1b79/0x1ee0 fs/reiserfs/inode.c:3388 notify_change+0x19fd/0x1af0 fs/attr.c:499 do_truncate+0x22a/0x2a0 fs/open.c:66 do_sys_ftruncate+0x81c/0xb30 fs/open.c:194 __do_sys_ftruncate fs/open.c:205 [inline] __se_sys_ftruncate fs/open.c:203 [inline] __x64_sys_ftruncate+0x71/0xa0 fs/open.c:203 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Local variable cpu_key created at: reiserfs_delete_solid_item+0xbf/0xe90 fs/reiserfs/stree.c:1410 remove_save_link+0x2ed/0x420 fs/reiserfs/super.c:540 CPU: 0 PID: 5006 Comm: syz-executor429 Not tainted 6.7.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== --- 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.
