EXT4-fs (loop5): Remounting filesystem read-only
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kernel BUG at fs/ext4/ext4.h:2985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 463 Comm: syz.5.16 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_load_buddy_gfp+0xeb2/0xed0 fs/ext4/mballoc.c:1117
Code: ff e8 82 5e cd ff e9 82 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c8 f3 ff ff e8 88 5e cd ff e9 be f3 ff ff e8 ce 63 9f ff <0f> 0b e8 c7 63 9f ff 0f 0b e8 c0 63 9f ff 0f 0b e8 b9 63 9f ff 0f
RSP: 0018:ffff8881e75d7908 EFLAGS: 00010293
RAX: ffffffff81c01b12 RBX: 0000000000000001 RCX: ffff8881e8880000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000001f337701
RBP: ffff8881e75d7990 R08: dffffc0000000000 R09: ffff8881e75d79e8
R10: ffffed103cebaf44 R11: 1ffff1103cebaf3d R12: 1ffff1103ce50c7e
R13: ffff8881e7281000 R14: ffff8881e7286018 R15: 000000001f337701
FS:  00007fce47b236c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000b1d000 CR3: 00000001e7c63000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_discard_preallocations+0x5b2/0xae0 fs/ext4/mballoc.c:4124
 ext4_release_file+0x171/0x320 fs/ext4/file.c:98
 __fput+0x2a3/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x146/0x170 kernel/task_work.c:113
 get_signal+0x1352/0x13d0 kernel/signal.c:2532
 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
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fce480d3969
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:00007fce47b23038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000029000 RBX: 00007fce482fb080 RCX: 00007fce480d3969
RDX: 000000000208e24b RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fce48155ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fce482fb080 R15: 00007ffdd15aa2c8
Modules linked in:
---[ end trace c477510e75440a69 ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xeb2/0xed0 fs/ext4/mballoc.c:1117
Code: ff e8 82 5e cd ff e9 82 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c8 f3 ff ff e8 88 5e cd ff e9 be f3 ff ff e8 ce 63 9f ff <0f> 0b e8 c7 63 9f ff 0f 0b e8 c0 63 9f ff 0f 0b e8 b9 63 9f ff 0f
RSP: 0018:ffff8881e75d7908 EFLAGS: 00010293
RAX: ffffffff81c01b12 RBX: 0000000000000001 RCX: ffff8881e8880000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000001f337701
RBP: ffff8881e75d7990 R08: dffffc0000000000 R09: ffff8881e75d79e8
R10: ffffed103cebaf44 R11: 1ffff1103cebaf3d R12: 1ffff1103ce50c7e
R13: ffff8881e7281000 R14: ffff8881e7286018 R15: 000000001f337701
FS:  00007fce47b236c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200001000000 CR3: 00000001e7c63000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400