* [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86
@ 2023-05-16 21:02 agentzh at gmail dot com
2023-05-16 21:03 ` [Bug runtime/30454] " agentzh at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: agentzh at gmail dot com @ 2023-05-16 21:02 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=30454
Bug ID: 30454
Summary: The stap runtime does not call nmi_uaccess_okay() to
protect data races against CR3 switching on X86
Product: systemtap
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: runtime
Assignee: systemtap at sourceware dot org
Reporter: agentzh at gmail dot com
Target Milestone: ---
See the upstream kernel commit 4012e77a90 for more details.
I'm already preparing a fix.
--
You are receiving this mail because:
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug runtime/30454] The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 2023-05-16 21:02 [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 agentzh at gmail dot com @ 2023-05-16 21:03 ` agentzh at gmail dot com 2023-05-16 21:07 ` agentzh at gmail dot com ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: agentzh at gmail dot com @ 2023-05-16 21:03 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30454 --- Comment #1 from agentzh <agentzh at gmail dot com> --- This check should be done before trying to read userland memory. -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug runtime/30454] The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 2023-05-16 21:02 [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 agentzh at gmail dot com 2023-05-16 21:03 ` [Bug runtime/30454] " agentzh at gmail dot com @ 2023-05-16 21:07 ` agentzh at gmail dot com 2023-05-16 21:31 ` agentzh at gmail dot com 2023-05-16 21:56 ` agentzh at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: agentzh at gmail dot com @ 2023-05-16 21:07 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30454 --- Comment #2 from agentzh <agentzh at gmail dot com> --- And see also the upstream kernel commit d319f344561de. -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug runtime/30454] The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 2023-05-16 21:02 [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 agentzh at gmail dot com 2023-05-16 21:03 ` [Bug runtime/30454] " agentzh at gmail dot com 2023-05-16 21:07 ` agentzh at gmail dot com @ 2023-05-16 21:31 ` agentzh at gmail dot com 2023-05-16 21:56 ` agentzh at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: agentzh at gmail dot com @ 2023-05-16 21:31 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30454 --- Comment #3 from agentzh <agentzh at gmail dot com> --- I'd propose this patch for stap: https://gist.github.com/agentzh/0ab23b34dea6afda43f1890ca2f2660b -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug runtime/30454] The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 2023-05-16 21:02 [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 agentzh at gmail dot com ` (2 preceding siblings ...) 2023-05-16 21:31 ` agentzh at gmail dot com @ 2023-05-16 21:56 ` agentzh at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: agentzh at gmail dot com @ 2023-05-16 21:56 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30454 agentzh <agentzh at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #4 from agentzh <agentzh at gmail dot com> --- Pushed the fix as commit c0430f888c73. -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-05-16 21:56 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-05-16 21:02 [Bug runtime/30454] New: The stap runtime does not call nmi_uaccess_okay() to protect data races against CR3 switching on X86 agentzh at gmail dot com 2023-05-16 21:03 ` [Bug runtime/30454] " agentzh at gmail dot com 2023-05-16 21:07 ` agentzh at gmail dot com 2023-05-16 21:31 ` agentzh at gmail dot com 2023-05-16 21:56 ` agentzh at gmail dot com
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