Stage 3 CASE12: Worksheet

[WORKSHEET BASE]
- [puzzle_verify_worksheet.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/puzzle_verify_worksheet.md)
- [user_puzzle_worksheet.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/user_puzzle_worksheet.md)

[WORKSHEET AXIOM]
- [puzzle_verify_worksheet_axiom.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/puzzle_verify_worksheet_axiom.md)
- [user_puzzle_worksheet_axiom.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/user_puzzle_worksheet_axiom.md)

[WORKSHEET AXIOM HARD]
- [puzzle_verify_worksheet_axiom_hard.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/puzzle_verify_worksheet_axiom_hard.md)
- [user_puzzle_worksheet_axiom_hard.md](https://github.com/raikrahul/what-happens-when-open-is-called/blob/main/kernel/user/stage3/case12_harder_puzzle/worksheets/user_puzzle_worksheet_axiom_hard.md)

[REQUIRED HAND TASKS]
1. Verify entry/ret pair counts.
2. Verify pointer class counts.
3. Record contradiction lines and expected fixes.
4. Cross-compare with one adjacent case.

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[AUTO] case=case12

[USERDIR] kernel/user/stage3/case12_harder_puzzle

================================================================================
[EMBED] puzzle_verify_worksheet.md
[SOURCE] kernel/user/stage3/case12_harder_puzzle/worksheets/puzzle_verify_worksheet.md
================================================================================
# Worksheet: puzzle_verify

- Generated: `2026-02-15T01:16:11`
- Userspace: `kernel/user/stage3/case12_harder_puzzle/puzzle_verify.c`
- Driver: `kernel/drivers/stage3/case12_harder_puzzle/trace_puzzle_verify/trace_puzzle_verify.c`
- Module: `trace_puzzle_verify`
- Binary: `kernel/user/stage3/case12_harder_puzzle/puzzle_verify.out`
- Status: `pass_probe_hits`

## Probe Totals
- `do_filp_open.entry`: 8
- `do_filp_open.ret`: 8
- `__d_alloc.entry`: 0
- `__d_alloc.ret`: 0
- `ERR_PTR(-ENOENT)` returns: 6
- non-error pointer returns: 2

## Full Function Trace Steps (Pseudo-Debugger Style)
- #1. call=`do_filp_open.entry` source_line=`dmesg:2` raw=`[53091.268659] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fb84`
- #2. call=`do_filp_open.ret` source_line=`dmesg:3` raw=`[53091.268682] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #3. call=`do_filp_open.entry` source_line=`dmesg:4` raw=`[53091.268696] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fe44`
- #4. call=`do_filp_open.ret` source_line=`dmesg:5` raw=`[53091.268708] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #5. call=`do_filp_open.entry` source_line=`dmesg:6` raw=`[53091.268720] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fb94`
- #6. call=`do_filp_open.ret` source_line=`dmesg:7` raw=`[53091.268731] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #7. call=`do_filp_open.entry` source_line=`dmesg:8` raw=`[53091.268746] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fcb4`
- #8. call=`do_filp_open.ret` source_line=`dmesg:9` raw=`[53091.268754] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #9. call=`do_filp_open.entry` source_line=`dmesg:10` raw=`[53091.268761] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fdd4`
- #10. call=`do_filp_open.ret` source_line=`dmesg:11` raw=`[53091.268769] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #11. call=`do_filp_open.entry` source_line=`dmesg:12` raw=`[53091.268776] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fb34`
- #12. call=`do_filp_open.ret` source_line=`dmesg:13` raw=`[53091.268784] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=fffffffffffffffe`
- #13. call=`do_filp_open.entry` source_line=`dmesg:14` raw=`[53091.268792] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fe24`
- #14. call=`do_filp_open.ret` source_line=`dmesg:15` raw=`[53091.268802] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=ffff898e893ebcc0`
- #15. call=`do_filp_open.entry` source_line=`dmesg:16` raw=`[53091.268843] [trace_puzzle_verify] do_filp_open.entry pid=266875 comm=puzzle_verify.o dfd=4294967196 pathname=ffff898e868b3000 op=ffffcc970206fd84`
- #16. call=`do_filp_open.ret` source_line=`dmesg:17` raw=`[53091.268854] [trace_puzzle_verify] do_filp_open.ret pid=266875 comm=puzzle_verify.o ret=ffff898e893ebc00`

## Per-Probe Pair Checks
- Pair A: `do_filp_open.entry` -> `do_filp_open.ret`
- Count A entry=8 ret=8
- Pair B: `__d_alloc.entry` -> `__d_alloc.ret`
- Count B entry=0 ret=0

## Raw Artifacts
- report: `kernel/user/stage3/case12_harder_puzzle/reports/puzzle_verify_trace_report.md`
- dmesg: `kernel/user/stage3/case12_harder_puzzle/reports/puzzle_verify_dmesg.txt`

================================================================================
[EMBED] user_puzzle_worksheet.md
[SOURCE] kernel/user/stage3/case12_harder_puzzle/worksheets/user_puzzle_worksheet.md
================================================================================
# Worksheet: user_puzzle

- Generated: `2026-02-15T01:16:11`
- Userspace: `kernel/user/stage3/case12_harder_puzzle/user_puzzle.c`
- Driver: `kernel/drivers/stage3/case12_harder_puzzle/trace_user_puzzle/trace_user_puzzle.c`
- Module: `trace_user_puzzle`
- Binary: `kernel/user/stage3/case12_harder_puzzle/user_puzzle.out`
- Status: `pass_probe_hits`

## Probe Totals
- `do_filp_open.entry`: 11
- `do_filp_open.ret`: 11
- `__d_alloc.entry`: 0
- `__d_alloc.ret`: 0
- `ERR_PTR(-ENOENT)` returns: 6
- non-error pointer returns: 5

## Full Function Trace Steps (Pseudo-Debugger Style)
- #1. call=`do_filp_open.entry` source_line=`dmesg:2` raw=`[53092.419408] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7d44`
- #2. call=`do_filp_open.ret` source_line=`dmesg:3` raw=`[53092.419431] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #3. call=`do_filp_open.entry` source_line=`dmesg:4` raw=`[53092.419445] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7e54`
- #4. call=`do_filp_open.ret` source_line=`dmesg:5` raw=`[53092.419456] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #5. call=`do_filp_open.entry` source_line=`dmesg:6` raw=`[53092.419468] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7c34`
- #6. call=`do_filp_open.ret` source_line=`dmesg:7` raw=`[53092.419479] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #7. call=`do_filp_open.entry` source_line=`dmesg:8` raw=`[53092.419495] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7bc4`
- #8. call=`do_filp_open.ret` source_line=`dmesg:9` raw=`[53092.419504] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #9. call=`do_filp_open.entry` source_line=`dmesg:10` raw=`[53092.419511] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7b34`
- #10. call=`do_filp_open.ret` source_line=`dmesg:11` raw=`[53092.419519] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #11. call=`do_filp_open.entry` source_line=`dmesg:12` raw=`[53092.419525] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7ba4`
- #12. call=`do_filp_open.ret` source_line=`dmesg:13` raw=`[53092.419533] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=fffffffffffffffe`
- #13. call=`do_filp_open.entry` source_line=`dmesg:14` raw=`[53092.419540] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7b54`
- #14. call=`do_filp_open.ret` source_line=`dmesg:15` raw=`[53092.419551] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=ffff899096eecd80`
- #15. call=`do_filp_open.entry` source_line=`dmesg:16` raw=`[53092.419589] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7dc4`
- #16. call=`do_filp_open.ret` source_line=`dmesg:17` raw=`[53092.419599] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=ffff899096eecf00`
- #17. call=`do_filp_open.entry` source_line=`dmesg:18` raw=`[53092.419970] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7ba4`
- #18. call=`do_filp_open.ret` source_line=`dmesg:19` raw=`[53092.420036] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=ffff899096eecd80`
- #19. call=`do_filp_open.entry` source_line=`dmesg:20` raw=`[53092.420092] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7c24`
- #20. call=`do_filp_open.ret` source_line=`dmesg:21` raw=`[53092.420129] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=ffff899096eecd80`
- #21. call=`do_filp_open.entry` source_line=`dmesg:22` raw=`[53092.420209] [trace_user_puzzle] do_filp_open.entry pid=267133 comm=user_puzzle.out dfd=4294967196 pathname=ffff898e8d701000 op=ffffcc9701eb7d14`
- #22. call=`do_filp_open.ret` source_line=`dmesg:23` raw=`[53092.420221] [trace_user_puzzle] do_filp_open.ret pid=267133 comm=user_puzzle.out ret=ffff899096eecd80`

## Per-Probe Pair Checks
- Pair A: `do_filp_open.entry` -> `do_filp_open.ret`
- Count A entry=11 ret=11
- Pair B: `__d_alloc.entry` -> `__d_alloc.ret`
- Count B entry=0 ret=0

## Raw Artifacts
- report: `kernel/user/stage3/case12_harder_puzzle/reports/user_puzzle_trace_report.md`
- dmesg: `kernel/user/stage3/case12_harder_puzzle/reports/user_puzzle_dmesg.txt`
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