On Mon, 1 Apr 2019, Steven Rostedt wrote: > From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx> > > 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/20161107213233.466776454@xxxxxxxxxxx > > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Andy Lutomirski <luto@xxxxxxxxxx> > Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx> > Cc: Oleg Nesterov <oleg@xxxxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> > Cc: linux-fsdevel@xxxxxxxxxxxxxxx > Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
