On Mon, 1 Apr 2019, Steven Rostedt wrote: > From: "Steven Rostedt (Red Hat)" <[email protected]> > > task_current_syscall() has a single user that passes in 6 for maxargs, which > is the maximum arguments that can be used to get system calls from > syscall_get_arguments(). Instead of passing in a number of arguments to > grab, just get 6 arguments. The args argument even specifies that it's an > array of 6 items. > > This will also allow changing syscall_get_arguments() to not get a variable > number of arguments, but always grab 6. > > Linus also suggested not passing in a bunch of arguments to > task_current_syscall() but to instead pass in a pointer to a structure, and > just fill the structure. struct seccomp_data has almost all the parameters > that is needed except for the stack pointer (sp). As seccomp_data is part of > uapi, and I'm afraid to change it, a new structure was created > "syscall_info", which includes seccomp_data and adds the "sp" field. > > Link: http://lkml.kernel.org/r/[email protected] > > Cc: Thomas Gleixner <[email protected]> > Cc: Andy Lutomirski <[email protected]> > Cc: Alexey Dobriyan <[email protected]> > Cc: Oleg Nesterov <[email protected]> > Cc: Kees Cook <[email protected]> > Cc: Al Viro <[email protected]> > Cc: [email protected] > Signed-off-by: Steven Rostedt (VMware) <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
