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| author |   Gregory Price <gourry.memverge@gmail.com> | 2023-04-07 13:18:33 -0400 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2023-04-16 14:23:07 +0200 |
| commit | 3f67987cdc09778e75098f9f5168832f8f8e1f1c (patch) | |
| tree | 48648bbc78fee9bc257739aff7f79031071ae0e8 /Documentation/admin-guide/syscall-user-dispatch.rst | |
| parent | syscall_user_dispatch: Untag selector address before access_ok() (diff) | |
| download | wireguard-linux-3f67987cdc09778e75098f9f5168832f8f8e1f1c.tar.xz wireguard-linux-3f67987cdc09778e75098f9f5168832f8f8e1f1c.zip | |
ptrace: Provide set/get interface for syscall user dispatch
The syscall user dispatch configuration can only be set by the task itself,
but lacks a ptrace set/get interface which makes it impossible to implement
checkpoint/restore for it.
Add the required ptrace requests and the get/set functions in the syscall
user dispatch code to make that possible.
Signed-off-by: Gregory Price <gregory.price@memverge.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20230407171834.3558-4-gregory.price@memverge.com
Diffstat (limited to 'Documentation/admin-guide/syscall-user-dispatch.rst')
| -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 -------------- |