Buffer I/O error on dev loop1, logical block 6, lost async page write
syz.1.462: attempt to access beyond end of device
loop1: rw=1, sector=7, nr_sectors = 1 limit=2
Buffer I/O error on dev loop1, logical block 7, lost async page write
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WARNING: CPU: 0 PID: 6598 at fs/buffer.c:1081 mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081
Modules linked in:
CPU: 0 PID: 6598 Comm: syz.1.462 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081
Code: 13 d1 e2 ff 49 8b 3f be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bc bc fc ff e8 a7 9f 92 ff e9 43 ff ff ff e8 9d 9f 92 ff <0f> 0b e9 ba fc ff ff e8 91 9f 92 ff 0f 0b e9 00 fd ff ff e8 85 9f
RSP: 0018:ffffc90005a7f810 EFLAGS: 00010293
RAX: ffffffff81ee4033 RBX: ffff888054b06910 RCX: ffff88802c088000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100f7fc001 R08: dffffc0000000000 R09: ffffed100a960d23
R10: ffffed100a960d23 R11: 1ffff1100a960d22 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8248eef0 R15: ffff88807bfe07d8
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5956572a60 CR3: 00000000262a4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_put_super+0x45/0x50 fs/hfs/super.c:49
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xb7/0x1240 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2d7518f749
Code: Unable to access opcode bytes at 0x7f2d7518f71f.
RSP: 002b:00007f2d7601e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: fffffffffffffe00 RBX: 00007f2d753e5fa0 RCX: 00007f2d7518f749
RDX: 000000000000000a RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f2d75213f91 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d753e6038 R14: 00007f2d753e5fa0 R15: 00007ffdc0629bd8
 </TASK>