EXT4-fs error (device loop6): ext4_map_blocks:617: inode #4: block 12: comm syz.6.1609: lblock 1 mapped to illegal pblock 12 (length 1)
Quota error (device loop6): qtree_write_dquot: dquota write failed
EXT4-fs error (device loop6) in ext4_reserve_inode_write:6102: Corrupt filesystem
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kernel BUG at fs/ext4/ext4.h:2985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6996 Comm: syz.6.1609 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:ffff8881dbb0ec28 EFLAGS: 00010246
RAX: ffffffff81c14708 RBX: 00000000010b824e RCX: 0000000000080000
RDX: ffffc90000ffc000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffff8881dbb0ecc0 R08: dffffc0000000000 R09: ffff8881dbb0eda0
R10: ffffed103b761dbb R11: 1ffff1103b761db4 R12: 1ffff1103c7a7e7e
R13: ffff8881e3d3f3f0 R14: 0000000000000001 R15: ffff8881dbb0eda0
FS:  00007fb45d5bb6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb45d599f98 CR3: 00000001ed5d0000 CR4: 00000000003426a0
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_get_block+0x1bb/0x4b0 fs/ext4/inode.c:802
 ext4_get_block+0x39/0x50 fs/ext4/inode.c:819
 ext4_block_write_begin+0x5b8/0x1240 fs/ext4/inode.c:1213
 ext4_write_begin+0x553/0x1700 fs/ext4/inode.c:1351
 generic_perform_write+0x2b8/0x500 mm/filemap.c:3450
 __generic_file_write_iter+0x24b/0x480 mm/filemap.c:3579
 ext4_file_write_iter+0x468/0xf90 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1991 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x480/0x5d0 fs/read_write.c:496
 vfs_write+0x20e/0x4c0 fs/read_write.c:558
 ksys_write+0x140/0x240 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:620
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fb45ef52969
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:00007fb45d5bb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb45f179fa0 RCX: 00007fb45ef52969
RDX: 0000000000000078 RSI: 0000200000000440 RDI: 0000000000000004
RBP: 00007fb45efd4ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb45f179fa0 R15: 00007ffd9a9f7238
Modules linked in:
---[ end trace b6e33f5f7a61fafe ]---
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:ffff8881dbb0ec28 EFLAGS: 00010246
RAX: ffffffff81c14708 RBX: 00000000010b824e RCX: 0000000000080000
RDX: ffffc90000ffc000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffff8881dbb0ecc0 R08: dffffc0000000000 R09: ffff8881dbb0eda0
R10: ffffed103b761dbb R11: 1ffff1103b761db4 R12: 1ffff1103c7a7e7e
R13: ffff8881e3d3f3f0 R14: 0000000000000001 R15: ffff8881dbb0eda0
FS:  00007fb45d5bb6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c31dff8 CR3: 00000001ed5d0000 CR4: 00000000003426b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400