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kernel BUG at fs/ext4/extents.c:3203!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 2249 Comm: syz.0.2164 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:ext4_split_extent_at+0x8e2/0xa40
Code: c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 a6 57 ae ff 4c 8b 23 e9 a1 fb ff ff b0 01 84 c0 0f 84 40 f9 ff ff e8 5f 15 44 ff 90 <0f> 0b 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c eb f7 ff ff 4c 89 e7 e8
RSP: 0018:ffffc90006e0f4c0 EFLAGS: 00010283
RAX: ffffffff82818ba1 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900297e9000 RSI: 0000000000000f84 RDI: 0000000000000f85
RBP: ffffc90006e0f610 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc90006e0f5a0 R11: fffff52000dc1eb5 R12: ffff88811e3c9c18
R13: 1ffff92000dc1eac R14: 0000000000000000 R15: 0000000000000025
FS:  00007f4478df66c0(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e9afbba950 CR3: 0000000104340000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_ext_remove_space+0x758/0x4280
 ext4_punch_hole+0x936/0xe80
 ext4_fallocate+0x370/0x3d0
 vfs_fallocate+0x669/0x7e0
 file_ioctl+0x63f/0x860
 do_vfs_ioctl+0xc26/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f447ab9c799
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:00007f4478df6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f447ae16090 RCX: 00007f447ab9c799
RDX: 0000200000000140 RSI: 0000000040305829 RDI: 0000000000000004
RBP: 00007f447ac32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f447ae16128 R14: 00007f447ae16090 R15: 00007fff57ea41f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_split_extent_at+0x8e2/0xa40
Code: c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 a6 57 ae ff 4c 8b 23 e9 a1 fb ff ff b0 01 84 c0 0f 84 40 f9 ff ff e8 5f 15 44 ff 90 <0f> 0b 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c eb f7 ff ff 4c 89 e7 e8
RSP: 0018:ffffc90006e0f4c0 EFLAGS: 00010283
RAX: ffffffff82818ba1 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900297e9000 RSI: 0000000000000f84 RDI: 0000000000000f85
RBP: ffffc90006e0f610 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc90006e0f5a0 R11: fffff52000dc1eb5 R12: ffff88811e3c9c18
R13: 1ffff92000dc1eac R14: 0000000000000000 R15: 0000000000000025
FS:  00007f4478df66c0(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e9afbba950 CR3: 0000000104340000 CR4: 00000000000006f0
