mips: fix syscall_get_nr
commit85cc91e2ba
upstream. The implementation of syscall_get_nr on mips used to ignore the task argument and return the syscall number of the calling thread instead of the target thread. The bug was exposed to user space by commit201766a20e
("ptrace: add PTRACE_GET_SYSCALL_INFO request") and detected by strace test suite. Link: https://github.com/strace/strace/issues/235 Fixes:c2d9f17757
("MIPS: Fix syscall_get_nr for the syscall exit tracing.") Cc: <stable@vger.kernel.org> # v3.19+ Co-developed-by: Dmitry V. Levin <ldv@strace.io> Signed-off-by: Dmitry V. Levin <ldv@strace.io> Signed-off-by: Elvira Khabirova <lineprinter0@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
295135e808
commit
dab227639f
|
@ -29,7 +29,7 @@
|
|||
static inline long syscall_get_nr(struct task_struct *task,
|
||||
struct pt_regs *regs)
|
||||
{
|
||||
return current_thread_info()->syscall;
|
||||
return task_thread_info(task)->syscall;
|
||||
}
|
||||
|
||||
static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
|
||||
|
|
Loading…
Reference in New Issue