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kernel BUG at fs/ext4/ext4.h:2985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4654 Comm: syz.6.1061 Not tainted 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: 0000:ffff8881e36160a8 EFLAGS: 00010293
RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: ffff8881e0fc8fc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881e3616140 R08: dffffc0000000000 R09: ffff8881e3616220
R10: ffffed103c6c2c4b R11: 1ffff1103c6c2c44 R12: 1ffff1103e75a87e
R13: ffff8881f3ad43f0 R14: 0000000000000001 R15: ffff8881e3616220
FS:  00007fb63d1db6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000fffffa40 CR3: 00000001cc023000 CR4: 00000000003406b0
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
 ext4_da_write_begin+0x307/0xf40 fs/ext4/inode.c:3110
 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
 __kernel_write+0xea/0x320 fs/read_write.c:515
 dump_emit+0x1c0/0x2c0 fs/coredump.c:838
 elf_core_dump+0x3082/0x3bd0 fs/binfmt_elf.c:2295
 do_coredump+0x1d8c/0x2ab0 fs/coredump.c:801
 get_signal+0xdb7/0x13d0 kernel/signal.c:2732
 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
 ret_from_intr+0x1c/0x1c
RIP: 0033:0x7fb63eb72971
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00000000fffffe10 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fb63ed99fa0 RCX: 00007fb63eb72969
RDX: 0000000000000000 RSI: 00000000fffffe10 RDI: 0000000000000000
RBP: 00007fb63ebf4ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb63ed99fa0 R15: 00007ffc87617488
Modules linked in:
---[ end trace 076d48e222df2116 ]---
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: 0000:ffff8881e36160a8 EFLAGS: 00010293
RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: ffff8881e0fc8fc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881e3616140 R08: dffffc0000000000 R09: ffff8881e3616220
R10: ffffed103c6c2c4b R11: 1ffff1103c6c2c44 R12: 1ffff1103e75a87e
R13: ffff8881f3ad43f0 R14: 0000000000000001 R15: ffff8881e3616220
FS:  00007fb63d1db6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000fffffa40 CR3: 00000001cc023000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400