------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:3185!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 451 Comm: syz.2.16 Not tainted 5.15.184-syzkaller-1080580-g4032a894ccb2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ext4_split_extent_at+0xe77/0xe90 fs/ext4/extents.c:3185
Code: 6f fb ff ff 48 89 df 49 89 d7 e8 b4 89 d3 ff 4c 89 fa e9 5c fb ff ff e8 57 18 95 ff 0f 0b e8 50 18 95 ff 0f 0b e8 49 18 95 ff <0f> 0b e8 42 18 95 ff 0f 0b e8 3b 18 95 ff 0f 0b e8 34 18 95 ff 0f
RSP: 0018:ffffc90003007940 EFLAGS: 00010293
RAX: ffffffff81d38c97 RBX: 1ffff110255431ff RCX: ffff8881135e4f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90003007ab0 R08: 0000000000000000 R09: 0000000050000028
R10: ffffed1022cd360a R11: 1ffff11022cd3608 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f7567a766c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000005e000 CR3: 000000012c6a0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_force_split_extent_at fs/ext4/extents.c:319 [inline]
 ext4_ext_remove_space+0x64b/0x4180 fs/ext4/extents.c:2878
 ext4_punch_hole+0x77c/0xbd0 fs/ext4/inode.c:4131
 ext4_fallocate+0x2b6/0x1de0 fs/ext4/extents.c:4763
 vfs_fallocate+0x4b4/0x590 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+0xc0/0x110 fs/open.c:338
 x64_sys_call+0x7ec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:286
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7568026969
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:00007f7567a76038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f756824e080 RCX: 00007f7568026969
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f75680a8ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f756824e080 R15: 00007ffdbabed1f8
 </TASK>
Modules linked in:
---[ end trace 36eba59f6860613d ]---
RIP: 0010:ext4_split_extent_at+0xe77/0xe90 fs/ext4/extents.c:3185
Code: 6f fb ff ff 48 89 df 49 89 d7 e8 b4 89 d3 ff 4c 89 fa e9 5c fb ff ff e8 57 18 95 ff 0f 0b e8 50 18 95 ff 0f 0b e8 49 18 95 ff <0f> 0b e8 42 18 95 ff 0f 0b e8 3b 18 95 ff 0f 0b e8 34 18 95 ff 0f
RSP: 0018:ffffc90003007940 EFLAGS: 00010293
RAX: ffffffff81d38c97 RBX: 1ffff110255431ff RCX: ffff8881135e4f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90003007ab0 R08: 0000000000000000 R09: 0000000050000028
R10: ffffed1022cd360a R11: 1ffff11022cd3608 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f7567a766c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000005e000 CR3: 000000012c6a0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400