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| author | Oleg Nesterov <oleg@redhat.com> | 2024-09-29 17:42:35 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-10-07 10:28:44 +0300 |
| commit | c7b4133c48445dde789ed30b19ccb0448c7593f7 (patch) | |
| tree | 6f1607568e089309bc692cd46dca226ab748e183 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | b302d5a6fff5dd7ddb1e4752d60c0eaa4cc4f7f3 (diff) | |
| download | linux-c7b4133c48445dde789ed30b19ccb0448c7593f7.tar.xz | |
uprobes: sanitiize xol_free_insn_slot()
1. Clear utask->xol_vaddr unconditionally, even if this addr is not valid,
xol_free_insn_slot() should never return with utask->xol_vaddr != NULL.
2. Add a comment to explain why do we need to validate slot_addr.
3. Simplify the validation above. We can simply check offset < PAGE_SIZE,
unsigned underflows are fine, it should work if slot_addr < area->vaddr.
4. Kill the unnecessary "slot_nr >= UINSNS_PER_PAGE" check, slot_nr must
be valid if offset < PAGE_SIZE.
The next patches will cleanup this function even more.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240929144235.GA9471@redhat.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions