------------[ cut here ]------------ kernel BUG at fs/buffer.c:391! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 22 Comm: ksoftirqd/1 Not tainted 6.6.0-rc3-syzkaller-00038-g0e945134b680 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:end_buffer_async_write+0x2db/0x340 fs/buffer.c:391 Code: 65 00 fe 4c 89 ff e8 94 a0 ff ff be 08 00 00 00 48 89 c7 48 89 c3 e8 d4 6b df ff f0 80 4b 01 04 e9 07 fe ff ff e8 95 af 89 ff <0f> 0b e8 8e af 89 ff 0f 0b 48 89 df e8 14 65 df ff e9 d9 fe ff ff RSP: 0018:ffffc900001c7c18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888016e7bb80 RSI: ffffffff81fe172b RDI: 0000000000000001 RBP: ffff88806fa0f828 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff81fe1450 R14: ffff88814884b980 R15: ffff888070c28648 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c0e99bf84 CR3: 000000001ab38000 CR4: 0000000000350ee0 Call Trace: end_bio_bh_io_sync+0xdd/0x130 fs/buffer.c:2771 bio_endio+0x593/0x6a0 block/bio.c:1603 req_bio_endio block/blk-mq.c:783 [inline] blk_update_request+0x67b/0x1780 block/blk-mq.c:928 blk_mq_end_request+0x57/0x520 block/blk-mq.c:1051 lo_complete_rq+0x232/0x2f0 drivers/block/loop.c:370 blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131 __do_softirq+0x218/0x965 kernel/softirq.c:553 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x31/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x660/0xa00 kernel/smpboot.c:164 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:end_buffer_async_write+0x2db/0x340 fs/buffer.c:391 Code: 65 00 fe 4c 89 ff e8 94 a0 ff ff be 08 00 00 00 48 89 c7 48 89 c3 e8 d4 6b df ff f0 80 4b 01 04 e9 07 fe ff ff e8 95 af 89 ff <0f> 0b e8 8e af 89 ff 0f 0b 48 89 df e8 14 65 df ff e9 d9 fe ff ff RSP: 0018:ffffc900001c7c18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888016e7bb80 RSI: ffffffff81fe172b RDI: 0000000000000001 RBP: ffff88806fa0f828 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff81fe1450 R14: ffff88814884b980 R15: ffff888070c28648 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c0e99bf84 CR3: 000000001ab38000 CR4: 0000000000350ee0