sched_getattr will return EFBIG
Bug #1842473 reported by
Thadeu Lima de Souza Cascardo
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
In Progress
|
High
|
Thadeu Lima de Souza Cascardo | ||
| Eoan |
Won't Fix
|
High
|
Thadeu Lima de Souza Cascardo | ||
Bug Description
With the introduction of utilization clamps interface on sched_[sg]etattr, sched_getattr will fail when used with the previous smaller struct sched_attr. And instead of using E2BIG as documented, it also ends up using EFBIG instead.
The interface change currently breaks userspace on 5.3 kernel.
Revision history for this message
| Thadeu Lima de Souza Cascardo (cascardo) wrote | #1 |
| Changed in linux (Ubuntu Eoan): | |
| status: | New → In Progress |
| importance: | Undecided → High |
| assignee: | nobody → Thadeu Lima de Souza Cascardo (cascardo) |
Revision history for this message
| Thadeu Lima de Souza Cascardo (cascardo) wrote | #2 |
Revision history for this message
| Thadeu Lima de Souza Cascardo (cascardo) wrote | #3 |
Revision history for this message
| Brian Murray (brian-murray) wrote | #4 |
| Changed in linux (Ubuntu Eoan): | |
| status: | In Progress → Won't Fix |
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This breaks ltp syscalls regression testing on 5.3. The EFBIG versus E2BIG should not happen in practice unless the other bug is also present, so I wouldn't bother fixing it on older versions.