------------[ cut here ]------------
kernel BUG at fs/ext4/extents_status.c:967!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1442 Comm: syz.6.276 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:967
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 de 27 cf ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 3c fa 0c 00 eb 13 e8 45 f5 89 ff <0f> 0b e8 3e f5 89 ff eb 28 e8 37 f5 89 ff 31 f6 65 ff 0d f6 f5 1a
RSP: 0018:ffffc90000fde3e0 EFLAGS: 00010293
RAX: ffffffff81e777bb RBX: 00000000000000a4 RCX: ffff888114125100
RDX: 0000000000000000 RSI: 00000000000000a4 RDI: 00000000000000a0
RBP: ffffc90000fde4e8 R08: ffffc90000fde457 R09: ffffc90000fde440
R10: dffffc0000000000 R11: fffff520001fbc8b R12: ffff88810e5473c8
R13: 47ffffffffffffff R14: 00000000000000a0 R15: dffffc0000000000
FS:  00007f39759866c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54c13e9e80 CR3: 0000000135c3f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_cache_extents fs/ext4/extents.c:536 [inline]
 __read_extent_tree_block+0x44b/0x790 fs/ext4/extents.c:583
 ext4_find_extent+0x8b9/0xe20 fs/ext4/extents.c:936
 ext4_ext_map_blocks+0x207/0x61d0 fs/ext4/extents.c:4166
 ext4_map_blocks+0x9d8/0x1b70 fs/ext4/inode.c:679
 _ext4_get_block+0x1ea/0x540 fs/ext4/inode.c:822
 ext4_get_block_unwritten+0x2e/0x100 fs/ext4/inode.c:855
 ext4_block_write_begin+0x594/0x1280 fs/ext4/inode.c:1124
 ext4_write_begin+0x600/0xf90 fs/ext4/ext4_jbd2.h:-1
 ext4_da_write_begin+0x3e7/0x8c0 fs/ext4/inode.c:3001
 generic_perform_write+0x32d/0x740 mm/filemap.c:3903
 ext4_buffered_write_iter+0x367/0x630 fs/ext4/file.c:285
 ext4_file_write_iter+0x191/0x1500 fs/ext4/file.c:-1
 __kernel_write_iter+0x296/0x660 fs/read_write.c:517
 dump_emit_page fs/coredump.c:886 [inline]
 dump_user_range+0x40b/0x660 fs/coredump.c:913
 elf_core_dump+0x2b52/0x3060 fs/binfmt_elf.c:2354
 do_coredump+0x15d3/0x2240 fs/coredump.c:760
 get_signal+0x11db/0x1520 kernel/signal.c:2877
 arch_do_signal_or_restart+0xd1/0x1140 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316
 irqentry_exit+0x12/0x40 kernel/entry/common.c:419
 exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1520
 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f3974b9c7a1
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3974e15fa0 RCX: 00007f3974b9c799
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f3974c32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f3974e16038 R14: 00007f3974e15fa0 R15: 00007ffc922ffff8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:967
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 de 27 cf ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 3c fa 0c 00 eb 13 e8 45 f5 89 ff <0f> 0b e8 3e f5 89 ff eb 28 e8 37 f5 89 ff 31 f6 65 ff 0d f6 f5 1a
RSP: 0018:ffffc90000fde3e0 EFLAGS: 00010293
RAX: ffffffff81e777bb RBX: 00000000000000a4 RCX: ffff888114125100
RDX: 0000000000000000 RSI: 00000000000000a4 RDI: 00000000000000a0
RBP: ffffc90000fde4e8 R08: ffffc90000fde457 R09: ffffc90000fde440
R10: dffffc0000000000 R11: fffff520001fbc8b R12: ffff88810e5473c8
R13: 47ffffffffffffff R14: 00000000000000a0 R15: dffffc0000000000
FS:  00007f39759866c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54c15e82f8 CR3: 0000000135c3f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400