Commit 5050e91f authored by Matt Redfearn's avatar Matt Redfearn Committed by Ralf Baechle

MIPS: Support sending SIG_SYS to 32bit userspace from 64bit kernel

The seccomp_bpf self test revealed that a 64bit kernel delivered an
invalid SIG_SYS to a 32bit userspace, because it was falling into the
default of the switch statement. Add a case to handle delivering the
signal.

With this patch, the seccomp_bpf self test now passes the TRAP.handler
case with O32 and N32 userlands.
Signed-off-by: default avatarMatt Redfearn <matt.redfearn@imgtec.com>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Amanieu d'Antras <amanieu@gmail.com>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: IMG-MIPSLinuxKerneldevelopers@imgtec.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12915/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0ce105bf
...@@ -227,6 +227,12 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) ...@@ -227,6 +227,12 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
err |= __put_user(from->si_uid, &to->si_uid); err |= __put_user(from->si_uid, &to->si_uid);
err |= __put_user(from->si_int, &to->si_int); err |= __put_user(from->si_int, &to->si_int);
break; break;
case __SI_SYS >> 16:
err |= __copy_to_user(&to->si_call_addr, &from->si_call_addr,
sizeof(compat_uptr_t));
err |= __put_user(from->si_syscall, &to->si_syscall);
err |= __put_user(from->si_arch, &to->si_arch);
break;
} }
} }
return err; return err;
......
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