using perf can crash kernel with a stack overflow
Bug #1875941 reported by
Colin Ian King
This bug report is a duplicate of:
Bug #1878649: Focal update: v5.4.41 upstream stable release.
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This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Confirmed
|
Unknown
|
|||
linux (Ubuntu) |
In Progress
|
High
|
Colin Ian King | ||
Focal |
Fix Committed
|
Undecided
|
Unassigned |
Bug Description
running sudo stress-ng --perf --cpu 1 -t 10 will cause the recent 5.4.0-25-generic kernel to lock up with no information on the console showing where it is locked up.
Bisected this back to:
commit d44d71bbb9618c5
Author: Joerg Roedel <email address hidden>
Date: Sat Mar 21 18:22:41 2020 -0700
x86/mm: split vmalloc_sync_all()
BugLink: https:/
commit 763802b53a427ed
Changed in linux (Ubuntu): | |
status: | New → Triaged |
importance: | Undecided → Critical |
assignee: | nobody → Colin Ian King (colin-king) |
status: | Triaged → In Progress |
Changed in linux (Ubuntu): | |
importance: | Critical → High |
summary: |
- using perf as root locks up focal kernel + using perf can crash kernel with a stack overflow |
Changed in linux: | |
status: | Unknown → Confirmed |
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This commit is revertable against the current focal head and resolves this issue.