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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-25 21:05:04 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-25 21:05:04 +0300 |
| commit | 15bbeec0fe9f1e910cb6a173005a02b6b4582f3c (patch) | |
| tree | 92f1f3c2fc8b23b53ffbd351fd884145690779be /Documentation | |
| parent | 29e95a4b2686b2cfb5564b3fb31371d5f71c6b66 (diff) | |
| parent | 8c8fa605f7b8b6df3e6fb280a74cff8d7374a7b7 (diff) | |
| download | linux-15bbeec0fe9f1e910cb6a173005a02b6b4582f3c.tar.xz | |
Merge tag 'core-entry-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core entry/ptrace update from Thomas Gleixner:
"Provide a ptrace set/get interface for syscall user dispatch. The main
purpose is to enable checkpoint/restore (CRIU) to handle processes
which utilize syscall user dispatch correctly"
* tag 'core-entry-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftest, ptrace: Add selftest for syscall user dispatch config api
ptrace: Provide set/get interface for syscall user dispatch
syscall_user_dispatch: Untag selector address before access_ok()
syscall_user_dispatch: Split up set_syscall_user_dispatch()
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/syscall-user-dispatch.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/admin-guide/syscall-user-dispatch.rst b/Documentation/admin-guide/syscall-user-dispatch.rst index 60314953c728..e3cfffef5a63 100644 --- a/Documentation/admin-guide/syscall-user-dispatch.rst +++ b/Documentation/admin-guide/syscall-user-dispatch.rst @@ -73,6 +73,10 @@ thread-wide, without the need to invoke the kernel directly. selector can be set to SYSCALL_DISPATCH_FILTER_ALLOW or SYSCALL_DISPATCH_FILTER_BLOCK. Any other value should terminate the program with a SIGSYS. +Additionally, a tasks syscall user dispatch configuration can be peeked +and poked via the PTRACE_(GET|SET)_SYSCALL_USER_DISPATCH_CONFIG ptrace +requests. This is useful for checkpoint/restart software. + Security Notes -------------- |