REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 4029, free_space(entry_count) 2 REISERFS error (device loop2): vs-5150 search_by_key: invalid format found in block 532. Fsck? REISERFS (device loop2): Remounting filesystem read-only general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 PID: 15373 Comm: syz-executor.2 Not tainted 6.1.55-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline] RIP: 0010:item_head fs/reiserfs/reiserfs.h:2200 [inline] RIP: 0010:tp_item_head fs/reiserfs/reiserfs.h:2226 [inline] RIP: 0010:direct2indirect+0x957/0x1830 fs/reiserfs/tail_conversion.c:119 Code: 49 c1 e7 04 4a 8d 5c 39 08 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 3d 03 00 00 48 63 1b 49 83 c5 28 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 7b d2 b3 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900034570c0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000000 RCX: ffffc90003457698 RDX: dffffc0000000000 RSI: 000000000000b40e RDI: 000000000000b40f RBP: ffffc90003457250 R08: ffffffff822dc30b R09: ffffffff822ce729 R10: 0000000000000002 R11: ffff88807c723b80 R12: 0000000000000001 R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f26749bc6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32925000 CR3: 0000000078beb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_get_block+0x4c57/0x5150 fs/reiserfs/inode.c:949 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991 reiserfs_write_begin+0x249/0x510 fs/reiserfs/inode.c:2775 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3754 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3882 generic_file_write_iter+0xab/0x310 mm/filemap.c:3914 call_write_iter include/linux/fs.h:2205 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 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: 0033:0x7f267de7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f26749bc0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f267df9c120 RCX: 00007f267de7cae9 RDX: 0000000000000030 RSI: 0000000020001640 RDI: 0000000000000004 RBP: 00007f267dec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f267df9c120 R15: 00007ffcfd5df328 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline] RIP: 0010:item_head fs/reiserfs/reiserfs.h:2200 [inline] RIP: 0010:tp_item_head fs/reiserfs/reiserfs.h:2226 [inline] RIP: 0010:direct2indirect+0x957/0x1830 fs/reiserfs/tail_conversion.c:119 Code: 49 c1 e7 04 4a 8d 5c 39 08 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 3d 03 00 00 48 63 1b 49 83 c5 28 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 7b d2 b3 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900034570c0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000000 RCX: ffffc90003457698 RDX: dffffc0000000000 RSI: 000000000000b40e RDI: 000000000000b40f RBP: ffffc90003457250 R08: ffffffff822dc30b R09: ffffffff822ce729 R10: 0000000000000002 R11: ffff88807c723b80 R12: 0000000000000001 R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f26749bc6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32926000 CR3: 0000000078beb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 49 c1 e7 04 shl $0x4,%r15 4: 4a 8d 5c 39 08 lea 0x8(%rcx,%r15,1),%rbx 9: 48 89 d8 mov %rbx,%rax c: 48 c1 e8 03 shr $0x3,%rax 10: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 14: 84 c0 test %al,%al 16: 0f 85 3d 03 00 00 jne 0x359 1c: 48 63 1b movslq (%rbx),%rbx 1f: 49 83 c5 28 add $0x28,%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 ef mov %r13,%rdi 33: e8 7b d2 b3 ff call 0xffb3d2b3 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah