EXT4-fs warning (device loop3): ext4_es_cache_extent:1082: inode #18: comm syz.3.5800: ES cache extent failed: add [86,1,343,0x2] conflict with existing [26,-27,576460752303423487,0x18]
------------[ cut here ]------------
kernel BUG at fs/ext4/extents_status.c:1044!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 26599 Comm: syz.3.5800 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_es_cache_extent+0x875/0x9e0 fs/ext4/extents_status.c:1044
Code: e1 07 80 c1 03 38 c1 0f 8c 5c fe ff ff 48 8b 7c 24 18 e8 fe ac ad ff e9 4d fe ff ff e8 a4 6e 43 ff 90 0f 0b e8 9c 6e 43 ff 90 <0f> 0b 65 8b 1d e6 98 99 10 bf 07 00 00 00 89 de e8 c6 72 43 ff 83
RSP: 0018:ffffc90006c966e0 EFLAGS: 00010287
RAX: ffffffff82822744 RBX: 0000000000000024 RCX: 0000000000080000
RDX: ffffc9000f157000 RSI: 000000000000f2da RDI: 000000000000f2db
RBP: ffffc90006c96828 R08: ffffc90006c96797 R09: ffffc90006c96780
R10: dffffc0000000000 R11: fffff52000d92cf3 R12: ffffc90006c96780
R13: 0000000000000057 R14: 000000000000000f R15: dffffc0000000000
FS:  00007f6ccfbf66c0(0000) GS:ffff888125464000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe2197d108 CR3: 000000008dfd4000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_cache_extents fs/ext4/extents.c:539 [inline]
 __read_extent_tree_block+0x4b4/0x890 fs/ext4/extents.c:586
 ext4_find_extent+0x76f/0xcc0 fs/ext4/extents.c:939
 ext4_ext_create_new_leaf fs/ext4/extents.c:1439 [inline]
 ext4_ext_insert_extent+0x14c0/0x4b50 fs/ext4/extents.c:2120
 ext4_ext_map_blocks+0x1696/0x58b0 fs/ext4/extents.c:4457
 ext4_map_create_blocks+0x11d/0x540 fs/ext4/inode.c:616
 ext4_map_blocks+0x7cd/0x11d0 fs/ext4/inode.c:809
 _ext4_get_block+0x1e3/0x470 fs/ext4/inode.c:909
 ext4_get_block_unwritten+0x2e/0x100 fs/ext4/inode.c:942
 ext4_block_write_begin+0xb14/0x1950 fs/ext4/inode.c:1196
 ext4_write_begin+0xb40/0x18c0 fs/ext4/ext4_jbd2.h:-1
 ext4_da_write_begin+0x355/0xd80 fs/ext4/inode.c:3123
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4314
 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:300
 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1
 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 do_sendfile+0x535/0x7d0 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6cd199c799
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:00007f6ccfbf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6cd1c16090 RCX: 00007f6cd199c799
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f6cd1a32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6cd1c16128 R14: 00007f6cd1c16090 R15: 00007ffd5e9d36d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_es_cache_extent+0x875/0x9e0 fs/ext4/extents_status.c:1044
Code: e1 07 80 c1 03 38 c1 0f 8c 5c fe ff ff 48 8b 7c 24 18 e8 fe ac ad ff e9 4d fe ff ff e8 a4 6e 43 ff 90 0f 0b e8 9c 6e 43 ff 90 <0f> 0b 65 8b 1d e6 98 99 10 bf 07 00 00 00 89 de e8 c6 72 43 ff 83
RSP: 0018:ffffc90006c966e0 EFLAGS: 00010287
RAX: ffffffff82822744 RBX: 0000000000000024 RCX: 0000000000080000
RDX: ffffc9000f157000 RSI: 000000000000f2da RDI: 000000000000f2db
RBP: ffffc90006c96828 R08: ffffc90006c96797 R09: ffffc90006c96780
R10: dffffc0000000000 R11: fffff52000d92cf3 R12: ffffc90006c96780
R13: 0000000000000057 R14: 000000000000000f R15: dffffc0000000000
FS:  00007f6ccfbf66c0(0000) GS:ffff888125564000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c30b635 CR3: 000000008dfd4000 CR4: 0000000000350ef0