------------[ cut here ]------------ kernel BUG at fs/buffer.c:2074! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3061 Comm: syz-executor.1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:__block_commit_write+0x279/0x280 fs/buffer.c:2074 Code: ff 48 8b 5d b8 48 89 df be 08 00 00 00 e8 2f 85 e9 ff f0 80 0b 04 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 27 04 ab ff <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 RSP: 0018:ffffc90002d97750 EFLAGS: 00010293 RAX: ffffffff81bdba89 RBX: 0000000000000000 RCX: ffff8881151abb40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002d977a0 R08: dffffc0000000000 R09: fffff94000954841 R10: fffff94000954841 R11: 1ffffd4000954840 R12: 000000000000000c R13: ffff888128a035f0 R14: ffffea0004aa4200 R15: dffffc0000000000 FS: 00007f1528f866c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fccc1246988 CR3: 000000011b5a8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: block_write_end+0x48/0x90 fs/buffer.c:2164 ext4_write_end+0x221/0xa70 fs/ext4/inode.c:1337 ext4_da_write_end+0x8b/0x9e0 fs/ext4/inode.c:3083 generic_perform_write+0x34c/0x670 mm/filemap.c:3881 ext4_buffered_write_iter+0x4ed/0x670 fs/ext4/file.c:270 ext4_file_write_iter+0x18c/0x14c0 fs/ext4/file.c:664 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x802/0xf70 fs/read_write.c:594 ksys_write+0x140/0x240 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1529424da9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1528f860c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1529554050 RCX: 00007f1529424da9 RDX: 000000000000000c RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007f152947147a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f1529554050 R15: 00007ffd802df828 Modules linked in: ---[ end trace 1cb718e38a428251 ]--- RIP: 0010:__block_commit_write+0x279/0x280 fs/buffer.c:2074 Code: ff 48 8b 5d b8 48 89 df be 08 00 00 00 e8 2f 85 e9 ff f0 80 0b 04 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 27 04 ab ff <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 RSP: 0018:ffffc90002d97750 EFLAGS: 00010293 RAX: ffffffff81bdba89 RBX: 0000000000000000 RCX: ffff8881151abb40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002d977a0 R08: dffffc0000000000 R09: fffff94000954841 R10: fffff94000954841 R11: 1ffffd4000954840 R12: 000000000000000c R13: ffff888128a035f0 R14: ffffea0004aa4200 R15: dffffc0000000000 FS: 00007f1528f866c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020014000 CR3: 000000011b5a8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400