EXT4-fs error (device loop6): ext4_map_blocks:617: inode #3: block 15: comm syz.6.146: lblock 2 mapped to illegal pblock 15 (length 1)
EXT4-fs error (device loop6): __ext4_get_inode_loc:4710: comm syz.6.146: Invalid inode table block 34 in block_group 0
EXT4-fs error (device loop6) in ext4_reserve_inode_write:6102: Corrupt filesystem
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:2985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1016 Comm: syz.6.146 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline]
RIP: 0010:ext4_mb_find_by_goal+0x968/0x9a0 fs/ext4/mballoc.c:1830
Code: fc ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c 14 fd ff ff 48 8b 7d b0 e8 f6 31 cc ff 48 8b 55 b0 e9 02 fd ff ff e8 d8 37 9e ff <0f> 0b e8 d1 37 9e ff 0f 0b e8 ca 37 9e ff 0f 0b e8 c3 37 9e ff 0f
RSP: 0018:ffff8881e018f548 EFLAGS: 00010287
RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90006557000 RSI: 000000000001f952 RDI: 000000000001f953
RBP: ffff8881e018f5e0 R08: dffffc0000000000 R09: ffff8881e018f6c0
R10: ffffed103c031edf R11: 1ffff1103c031ed8 R12: 1ffff1103c8c647e
R13: ffff8881e46323f0 R14: 0000000000000001 R15: ffff8881e018f6c0
FS:  00007f91f5b4b6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91f5b4af98 CR3: 00000001e65a5000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_mb_regular_allocator+0x192/0xfb0 fs/ext4/mballoc.c:2131
 ext4_mb_new_blocks+0x5a9/0x2e80 fs/ext4/mballoc.c:4600
 ext4_ext_map_blocks+0x183c/0x63c0 fs/ext4/extents.c:4549
 ext4_map_blocks+0x92d/0x1b00 fs/ext4/inode.c:661
 ext4_alloc_file_blocks+0x34c/0xb00 fs/ext4/extents.c:4745
 ext4_fallocate+0x2fc/0x540 fs/ext4/extents.c:5032
 vfs_fallocate+0x587/0x700 fs/open.c:309
 ksys_fallocate fs/open.c:332 [inline]
 __do_sys_fallocate fs/open.c:340 [inline]
 __se_sys_fallocate fs/open.c:338 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:338
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f91f7524969
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:00007f91f5b4b038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f91f774c160 RCX: 00007f91f7524969
RDX: 0000000000000000 RSI: 0400000000000000 RDI: 0000000000000004
RBP: 00007f91f75a6ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000009000f4 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f91f774c160 R15: 00007fff7ff78a98
Modules linked in:
---[ end trace fe4e109f45f3ac4a ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline]
RIP: 0010:ext4_mb_find_by_goal+0x968/0x9a0 fs/ext4/mballoc.c:1830
Code: fc ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c 14 fd ff ff 48 8b 7d b0 e8 f6 31 cc ff 48 8b 55 b0 e9 02 fd ff ff e8 d8 37 9e ff <0f> 0b e8 d1 37 9e ff 0f 0b e8 ca 37 9e ff 0f 0b e8 c3 37 9e ff 0f
RSP: 0018:ffff8881e018f548 EFLAGS: 00010287
RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90006557000 RSI: 000000000001f952 RDI: 000000000001f953
RBP: ffff8881e018f5e0 R08: dffffc0000000000 R09: ffff8881e018f6c0
R10: ffffed103c031edf R11: 1ffff1103c031ed8 R12: 1ffff1103c8c647e
R13: ffff8881e46323f0 R14: 0000000000000001 R15: ffff8881e018f6c0
FS:  00007f91f5b4b6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91f5b4af98 CR3: 00000001e65a5000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400