Hello, syzbot found the following issue on: HEAD commit: 88603b6dc419 Linux 6.2-rc2 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=156f88b8480000 kernel config: https://syzkaller.appspot.com/x/.config?x=9babfdc3dd4772d0 dashboard link: https://syzkaller.appspot.com/bug?extid=6a0877ace12bfad107fc compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12bdb82a480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=108acc94480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a44a84e5e4e6/disk-88603b6d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/df723f71c09d/vmlinux-88603b6d.xz kernel image: https://storage.googleapis.com/syzbot-assets/3db040a6ceef/bzImage-88603b6d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/5c2f508ccf3c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6a0877ace12bfad107fc@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS panic (device loop0): vs-12195 balance_leaf: CFR not initialized ------------[ cut here ]------------ kernel BUG at fs/reiserfs/prints.c:390! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5070 Comm: syz-executor245 Not tainted 6.2.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__reiserfs_panic+0x12f/0x140 fs/reiserfs/prints.c:390 Code: c0 50 03 8b 48 0f 44 c8 48 0f 44 d8 48 c7 c7 80 51 03 8b 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 40 46 16 92 31 c0 e8 01 ec 82 08 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 RSP: 0018:ffffc90003d5e7e0 EFLAGS: 00010246 RAX: 0000000000000049 RBX: ffffffff8b02e520 RCX: 37780e38b943e200 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc90003d5e8d0 R08: ffffffff816f2c9d R09: fffff520007abcb5 R10: fffff520007abcb5 R11: 1ffff920007abcb4 R12: ffffffff8b02e540 R13: ffffc90003d5e800 R14: ffffffff8cc70ec0 R15: ffff888028b806a8 FS: 00007fd74c6aa700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd744689718 CR3: 0000000079f45000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> balance_leaf+0x109eb/0x123a0 fs/reiserfs/do_balan.c:1439 do_balance+0x2d6/0x8d0 fs/reiserfs/do_balan.c:1888 reiserfs_insert_item+0xb54/0xcb0 fs/reiserfs/stree.c:2261 reiserfs_new_inode+0x11c7/0x1cd0 fs/reiserfs/inode.c:2054 reiserfs_create+0x3a6/0x660 fs/reiserfs/namei.c:668 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12ac/0x2dd0 fs/namei.c:3711 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd74c6fe559 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd74c6aa2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fd74c7847a0 RCX: 00007fd74c6fe559 RDX: 0000000000000241 RSI: 0000000020000000 RDI: 00000000ffffff9c RBP: 00007fd74c7512b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd74c7511b8 R13: 0030656c69662f2e R14: 7366726573696572 R15: 00007fd74c7847a8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__reiserfs_panic+0x12f/0x140 fs/reiserfs/prints.c:390 Code: c0 50 03 8b 48 0f 44 c8 48 0f 44 d8 48 c7 c7 80 51 03 8b 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 40 46 16 92 31 c0 e8 01 ec 82 08 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 RSP: 0018:ffffc90003d5e7e0 EFLAGS: 00010246 RAX: 0000000000000049 RBX: ffffffff8b02e520 RCX: 37780e38b943e200 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc90003d5e8d0 R08: ffffffff816f2c9d R09: fffff520007abcb5 R10: fffff520007abcb5 R11: 1ffff920007abcb4 R12: ffffffff8b02e540 R13: ffffc90003d5e800 R14: ffffffff8cc70ec0 R15: ffff888028b806a8 FS: 00007fd74c6aa700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd744689718 CR3: 0000000079f45000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
