REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [2 2 0x0 SD] (nlink == 1) not found (pos 0) REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [2 2 0x0 SD] (nlink == 1) not found (pos 0) general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 PID: 4323 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:balance_internal_when_delete fs/reiserfs/ibalance.c:675 [inline] RIP: 0010:balance_internal+0x290e/0x4ab0 fs/reiserfs/ibalance.c:849 Code: 48 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 95 2f bf ff 49 8b 06 48 89 44 24 20 48 8d 58 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 73 2f bf ff 44 8b 33 48 b8 00 00 RSP: 0018:ffffc90002feeb00 EFLAGS: 00010206 RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff88802187d940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002feed90 R08: ffff888140a9e82f R09: 1ffff11028153d05 R10: dffffc0000000000 R11: ffffed1028153d06 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002feefc8 R15: ffffc90002feef80 FS: 0000555562b2d500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26d9819000 CR3: 000000001fcac000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_balance+0x36e/0x930 fs/reiserfs/do_balan.c:1896 reiserfs_delete_solid_item+0x94a/0xfa0 fs/reiserfs/stree.c:1462 remove_save_link+0x254/0x3e0 fs/reiserfs/super.c:540 reiserfs_truncate_file+0x7c9/0xe40 fs/reiserfs/inode.c:2330 reiserfs_setattr+0xab3/0x1090 fs/reiserfs/inode.c:3409 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 handle_truncate fs/namei.c:3273 [inline] do_open fs/namei.c:3620 [inline] path_openat+0x2922/0x2fa0 fs/namei.c:3750 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_open fs/open.c:1279 [inline] __se_sys_open fs/open.c:1275 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdc70d17e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc979ac208 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fdc70f90fa0 RCX: 00007fdc70d17e59 RDX: 000000000000012a RSI: 0000000000000200 RDI: 00002000000001c0 RBP: 00007fdc70dadd6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdc70f90fac R14: 00007fdc70f90fa0 R15: 00007fdc70f90fa0 Modules linked in: ---[ end trace 36aa36403eb78e5a ]--- RIP: 0010:balance_internal_when_delete fs/reiserfs/ibalance.c:675 [inline] RIP: 0010:balance_internal+0x290e/0x4ab0 fs/reiserfs/ibalance.c:849 Code: 48 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 95 2f bf ff 49 8b 06 48 89 44 24 20 48 8d 58 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 73 2f bf ff 44 8b 33 48 b8 00 00 RSP: 0018:ffffc90002feeb00 EFLAGS: 00010206 RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff88802187d940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002feed90 R08: ffff888140a9e82f R09: 1ffff11028153d05 R10: dffffc0000000000 R11: ffffed1028153d06 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002feefc8 R15: ffffc90002feef80 FS: 0000555562b2d500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26d9819000 CR3: 000000001fcac000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 rex.W 1: 4c 89 f0 mov %r14,%rax 4: 48 c1 e8 03 shr $0x3,%rax 8: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) d: 74 08 je 0x17 f: 4c 89 f7 mov %r14,%rdi 12: e8 95 2f bf ff call 0xffbf2fac 17: 49 8b 06 mov (%r14),%rax 1a: 48 89 44 24 20 mov %rax,0x20(%rsp) 1f: 48 8d 58 18 lea 0x18(%rax),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 73 2f bf ff call 0xffbf2fac 39: 44 8b 33 mov (%rbx),%r14d 3c: 48 rex.W 3d: b8 .byte 0xb8