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 loop0): vs-5150 search_by_key: invalid format found in block 549. Fsck? REISERFS (device loop0): Remounting filesystem read-only REISERFS error (device loop0): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 2 0x0 SD] stat data 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 loop0): vs-5150 search_by_key: invalid format found in block 549. Fsck? general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 0 PID: 4982 Comm: syz.0.15 Not tainted 5.15.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 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:prepare_for_delete_or_cut+0x18b/0x2250 fs/reiserfs/stree.c:1050 Code: d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 dd 17 00 00 4c 63 33 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 e7 e8 86 8f b9 ff 4d 8b 3c 24 48 b8 00 RSP: 0018:ffffc90002387260 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffffc90002387a40 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000008 RBP: ffffc900023873e8 R08: ffffffff8210cfce R09: ffffc900023878b0 R10: 0000000000000002 R11: ffff888067c9bb80 R12: 0000000000000028 R13: 0000000000000f0c R14: 0000000000000000 R15: dffffc0000000000 FS: 000055558b59d500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020006000 CR3: 0000000073eb9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_cut_from_item+0x3ab/0x2560 fs/reiserfs/stree.c:1682 reiserfs_do_truncate+0xa12/0x15b0 fs/reiserfs/stree.c:1973 reiserfs_truncate_file+0x638/0xda0 fs/reiserfs/inode.c:2318 reiserfs_file_release+0x8c6/0xaa0 fs/reiserfs/file.c:109 __fput+0x3fe/0x8e0 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc5ca1d0ef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe66d27998 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000001ba61 RCX: 00007fc5ca1d0ef9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fc5ca38ba80 R08: 0000000000000001 R09: 00007ffe66d27c8f R10: 00007fc5ca054000 R11: 0000000000000246 R12: 000000000001bbb9 R13: 00007ffe66d27aa0 R14: 0000000000000032 R15: ffffffffffffffff Modules linked in: ---[ end trace 7ca82faaf1defd63 ]--- 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:prepare_for_delete_or_cut+0x18b/0x2250 fs/reiserfs/stree.c:1050 Code: d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 dd 17 00 00 4c 63 33 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 e7 e8 86 8f b9 ff 4d 8b 3c 24 48 b8 00 RSP: 0018:ffffc90002387260 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffffc90002387a40 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000008 RBP: ffffc900023873e8 R08: ffffffff8210cfce R09: ffffc900023878b0 R10: 0000000000000002 R11: ffff888067c9bb80 R12: 0000000000000028 R13: 0000000000000f0c R14: 0000000000000000 R15: dffffc0000000000 FS: 000055558b59d500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5ca1b4060 CR3: 0000000073eb9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 c1 e8 03 shr $0x3,%rax 4: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 b: fc ff df e: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax 13: 84 c0 test %al,%al 15: 0f 85 dd 17 00 00 jne 0x17f8 1b: 4c 63 33 movslq (%rbx),%r14 1e: 49 83 c4 28 add $0x28,%r12 22: 4c 89 e0 mov %r12,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 86 8f b9 ff call 0xffb98fbe 38: 4d 8b 3c 24 mov (%r12),%r15 3c: 48 rex.W 3d: b8 .byte 0xb8