EXT4-fs error (device loop4): ext4_map_blocks:617: inode #3: block 9: comm syz-executor.4: lblock 0 mapped to illegal pblock 9 (length 1)
EXT4-fs (loop4): Remounting filesystem read-only
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kernel BUG at fs/ext4/ext4.h:2984!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 439 Comm: syz-executor.4 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline]
RIP: 0010:ext4_mb_find_by_goal+0xba1/0xbe0 fs/ext4/mballoc.c:1830
Code: fc ff ff 48 8b 4c 24 28 80 e1 07 80 c1 03 38 c1 0f 8c 22 fc ff ff 48 8b 7c 24 28 e8 99 74 c8 ff e9 13 fc ff ff e8 af 8f 98 ff <0f> 0b e8 f8 44 6f ff e8 a3 8f 98 ff 0f 0b e8 9c 8f 98 ff 0f 0b e8
RSP: 0018:ffff8881d3877400 EFLAGS: 00010287
RAX: ffffffff81cbac71 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90000942000 RSI: 000000000002100b RDI: 000000000002100c
RBP: ffff8881d3877510 R08: ffffffff81cba1f1 R09: ffffed103b5d79fa
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881ec9763f0 R14: 0000000000000001 R15: 1ffff1103d92ec7e
FS:  00007f378c04b6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d24000 CR3: 00000001ece01000 CR4: 00000000003426a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_mb_regular_allocator+0x229/0x10d0 fs/ext4/mballoc.c:2132
 ext4_mb_new_blocks+0x59a/0x2d10 fs/ext4/mballoc.c:4604
 ext4_ext_map_blocks+0x1e70/0x7450 fs/ext4/extents.c:4511
 ext4_map_blocks+0xa2f/0x1ba0 fs/ext4/inode.c:661
 ext4_alloc_file_blocks+0x3b1/0xc20 fs/ext4/extents.c:4700
 ext4_fallocate+0x3b5/0x570 fs/ext4/extents.c:4987
 vfs_fallocate+0x551/0x6b0 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+0xb9/0x100 fs/open.c:338
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f378ccd0f69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f378c04b0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f378ce07f80 RCX: 00007f378ccd0f69
RDX: 0000000000002000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f378cd2e6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f378ce07f80 R15: 00007ffc3364b288
Modules linked in:
---[ end trace d78f5b8f8789b61d ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline]
RIP: 0010:ext4_mb_find_by_goal+0xba1/0xbe0 fs/ext4/mballoc.c:1830
Code: fc ff ff 48 8b 4c 24 28 80 e1 07 80 c1 03 38 c1 0f 8c 22 fc ff ff 48 8b 7c 24 28 e8 99 74 c8 ff e9 13 fc ff ff e8 af 8f 98 ff <0f> 0b e8 f8 44 6f ff e8 a3 8f 98 ff 0f 0b e8 9c 8f 98 ff 0f 0b e8
RSP: 0018:ffff8881d3877400 EFLAGS: 00010287
RAX: ffffffff81cbac71 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90000942000 RSI: 000000000002100b RDI: 000000000002100c
RBP: ffff8881d3877510 R08: ffffffff81cba1f1 R09: ffffed103b5d79fa
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881ec9763f0 R14: 0000000000000001 R15: 1ffff1103d92ec7e
FS:  00007f378c04b6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b2c000 CR3: 00000001ece01000 CR4: 00000000003426b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400