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kernel BUG at fs/ext4/resize.c:544!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 470 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:setup_new_flex_group_blocks fs/ext4/resize.c:543 [inline]
RIP: 0010:ext4_flex_group_add+0x4c92/0x4ca0 fs/ext4/resize.c:1499
Code: ff ff e8 d1 fb 8b ff 0f 0b e8 ca fb 8b ff 0f 0b e8 c3 fb 8b ff 0f 0b e8 bc fb 8b ff 0f 0b e8 b5 fb 8b ff 0f 0b e8 ae fb 8b ff <0f> 0b e8 a7 fb 8b ff 0f 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56
RSP: 0018:ffffc900016c7460 EFLAGS: 00010293
RAX: ffffffff81d8baa2 RBX: ffff8881168ec400 RCX: ffff888117a3cf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900016c7730 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520002d8e74 R12: 1ffff11022f3a000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f82d674f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f82d6d36800 CR3: 0000000117904000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_resize_fs+0x3337/0x4110 fs/ext4/resize.c:2105
 __ext4_ioctl fs/ext4/ioctl.c:1088 [inline]
 ext4_ioctl+0x23a4/0x39f0 fs/ext4/ioctl.c:1340
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f82d6ce90b9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f82d674f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f82d6f15fa0 RCX: 00007f82d6ce90b9
RDX: 0000200000000140 RSI: 0000000040086610 RDI: 0000000000000004
RBP: 00007f82d6d7b9c4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f82d6f15fa0 R15: 00007fff148d75a8
Modules linked in:
---[ end trace c7a5cffb7a199a46 ]---
RIP: 0010:setup_new_flex_group_blocks fs/ext4/resize.c:543 [inline]
RIP: 0010:ext4_flex_group_add+0x4c92/0x4ca0 fs/ext4/resize.c:1499
Code: ff ff e8 d1 fb 8b ff 0f 0b e8 ca fb 8b ff 0f 0b e8 c3 fb 8b ff 0f 0b e8 bc fb 8b ff 0f 0b e8 b5 fb 8b ff 0f 0b e8 ae fb 8b ff <0f> 0b e8 a7 fb 8b ff 0f 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56
RSP: 0018:ffffc900016c7460 EFLAGS: 00010293
RAX: ffffffff81d8baa2 RBX: ffff8881168ec400 RCX: ffff888117a3cf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900016c7730 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520002d8e74 R12: 1ffff11022f3a000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f82d674f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f82d6d36800 CR3: 0000000117904000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400