EXT4-fs warning (device loop0): ext4_block_to_path:107: block 3279949762 > max in inode 13 EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: none. EXT4-fs error (device loop0): ext4_map_blocks:672: inode #2: block 3: comm syz-executor343: lblock 0 mapped to illegal pblock 3 (length 1) EXT4-fs warning (device loop0): dx_probe:823: inode #2: lblock 0: comm syz-executor343: error -117 reading directory block BUG: unable to handle page fault for address: ffffffffffffff8b #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD e93c067 P4D e93c067 PUD e93e067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 5832 Comm: syz-executor343 Not tainted 6.14.0-rc3-next-20250218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__d_entry_type include/linux/dcache.h:416 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:421 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:467 [inline] RIP: 0010:lookup_one_qstr_excl+0x162/0x370 fs/namei.c:1696 Code: d3 66 90 48 85 c0 0f 85 58 01 00 00 e8 07 0f 84 ff 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 57 01 00 00 bb 00 00 38 00 <41> 23 1e 44 89 fd 81 e5 00 00 02 00 89 de 09 ee 31 ff e8 17 13 84 RSP: 0018:ffffc90003eefcb8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000380000 RCX: ffff8880344d0000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88807bbabe2c R08: ffff88807bb2298b R09: 1ffff1100f764531 R10: dffffc0000000000 R11: ffffed100f764532 R12: ffff88807bb228d0 R13: dffffc0000000000 R14: ffffffffffffff8b R15: 0000000000060000 FS: 000055556ec17380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffff8b CR3: 000000007dba2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> filename_create+0x282/0x480 fs/namei.c:4091 do_mkdirat+0xbd/0x3a0 fs/namei.c:4322 __do_sys_mkdirat fs/namei.c:4345 [inline] __se_sys_mkdirat fs/namei.c:4343 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4343 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6df4a19a99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007ffc151d83c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f6df4a19a99 RDX: 0000000000000000 RSI: 0000400000000280 RDI: 00000000ffffff9c RBP: 00007f6df4a8d5f0 R08: 000000000000048f R09: 000055556ec184c0 R10: 00007ffc151d8290 R11: 0000000000000246 R12: 00007ffc151d83f0 R13: 00007ffc151d8618 R14: 431bde82d7b634db R15: 00007f6df4a6203b </TASK> Modules linked in: CR2: ffffffffffffff8b ---[ end trace 0000000000000000 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:416 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:421 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:467 [inline] RIP: 0010:lookup_one_qstr_excl+0x162/0x370 fs/namei.c:1696 Code: d3 66 90 48 85 c0 0f 85 58 01 00 00 e8 07 0f 84 ff 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 57 01 00 00 bb 00 00 38 00 <41> 23 1e 44 89 fd 81 e5 00 00 02 00 89 de 09 ee 31 ff e8 17 13 84 RSP: 0018:ffffc90003eefcb8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000380000 RCX: ffff8880344d0000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88807bbabe2c R08: ffff88807bb2298b R09: 1ffff1100f764531 R10: dffffc0000000000 R11: ffffed100f764532 R12: ffff88807bb228d0 R13: dffffc0000000000 R14: ffffffffffffff8b R15: 0000000000060000 FS: 000055556ec17380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffff8b CR3: 000000007dba2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: d3 66 90 shll %cl,-0x70(%rsi) 3: 48 85 c0 test %rax,%rax 6: 0f 85 58 01 00 00 jne 0x164 c: e8 07 0f 84 ff call 0xff840f18 11: 4c 89 f0 mov %r14,%rax 14: 48 c1 e8 03 shr $0x3,%rax 18: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 1d: 84 c0 test %al,%al 1f: 0f 85 57 01 00 00 jne 0x17c 25: bb 00 00 38 00 mov $0x380000,%ebx * 2a: 41 23 1e and (%r14),%ebx <-- trapping instruction 2d: 44 89 fd mov %r15d,%ebp 30: 81 e5 00 00 02 00 and $0x20000,%ebp 36: 89 de mov %ebx,%esi 38: 09 ee or %ebp,%esi 3a: 31 ff xor %edi,%edi 3c: e8 .byte 0xe8 3d: 17 (bad) 3e: 13 .byte 0x13 3f: 84 .byte 0x84