* [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses
@ 2023-05-17 0:21 agentzh at gmail dot com
2023-05-18 5:29 ` [Bug runtime/30456] " agentzh at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: agentzh at gmail dot com @ 2023-05-17 0:21 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=30456
Bug ID: 30456
Summary: Kernel 5.18+ retired set_fs() and replaced it with the
user_access_begin/end() pair for userland memory
accesses
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: ---
Currently, the stap runtime does nothing for kernel 5.18+ without set_fs(),
which is wrong at least on x86 for userland accesses.
I'm preparing a fix by switching to the new replacement API,
user_access_begin() and user_access_end().
--
You are receiving this mail because:
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug runtime/30456] Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses 2023-05-17 0:21 [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses agentzh at gmail dot com @ 2023-05-18 5:29 ` agentzh at gmail dot com 2023-08-22 1:22 ` fche at redhat dot com 2023-08-24 0:11 ` fche at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: agentzh at gmail dot com @ 2023-05-18 5:29 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30456 --- Comment #1 from agentzh <agentzh at gmail dot com> --- I'd propose this patch to address this issue: https://gist.github.com/agentzh/0628614ac04f773c6662d225100924be -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug runtime/30456] Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses 2023-05-17 0:21 [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses agentzh at gmail dot com 2023-05-18 5:29 ` [Bug runtime/30456] " agentzh at gmail dot com @ 2023-08-22 1:22 ` fche at redhat dot com 2023-08-24 0:11 ` fche at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: fche at redhat dot com @ 2023-08-22 1:22 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30456 Frank Ch. Eigler <fche at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fche at redhat dot com --- Comment #2 from Frank Ch. Eigler <fche at redhat dot com> --- unfortunately, this triggers bug #30716 It appears that if we're going to use the stac/clac wrappers around calls to user-space access functions at all, those functions must be chosen from a whitelist. -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug runtime/30456] Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses 2023-05-17 0:21 [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses agentzh at gmail dot com 2023-05-18 5:29 ` [Bug runtime/30456] " agentzh at gmail dot com 2023-08-22 1:22 ` fche at redhat dot com @ 2023-08-24 0:11 ` fche at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: fche at redhat dot com @ 2023-08-24 0:11 UTC (permalink / raw) To: systemtap https://sourceware.org/bugzilla/show_bug.cgi?id=30456 Frank Ch. Eigler <fche at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED --- Comment #3 from Frank Ch. Eigler <fche at redhat dot com> --- commit a9337abbb213e82e919e67150b31399cc49c469f Author: Yichun Zhang (agentzh) <yichun@openresty.com> Date: Tue May 16 17:17:07 2023 -0700 PR30456: kernel 5.18+ removed set_fs() and we should use the new replacement, user_access_begin()/user_access_end() for userland memory accesses. -- You are receiving this mail because: You are the assignee for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-08-24 0:11 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-05-17 0:21 [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced it with the user_access_begin/end() pair for userland memory accesses agentzh at gmail dot com 2023-05-18 5:29 ` [Bug runtime/30456] " agentzh at gmail dot com 2023-08-22 1:22 ` fche at redhat dot com 2023-08-24 0:11 ` fche at redhat dot com
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).