diff options
| -rw-r--r-- | arch/x86_64/ia32/ptrace32.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c index a590b7a0d92..659c0722f6b 100644 --- a/arch/x86_64/ia32/ptrace32.c +++ b/arch/x86_64/ia32/ptrace32.c @@ -202,17 +202,24 @@ static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) { int ret; compat_siginfo_t *si32 = (compat_siginfo_t *)compat_ptr(data); + siginfo_t ssi; siginfo_t *si = compat_alloc_user_space(sizeof(siginfo_t)); if (request == PTRACE_SETSIGINFO) { - ret = copy_siginfo_from_user32(si, si32); + memset(&ssi, 0, sizeof(siginfo_t)); + ret = copy_siginfo_from_user32(&ssi, si32); if (ret) return ret; + if (copy_to_user(si, &ssi, sizeof(siginfo_t))) + return -EFAULT; } ret = sys_ptrace(request, pid, addr, (unsigned long)si); if (ret) return ret; - if (request == PTRACE_GETSIGINFO) - ret = copy_siginfo_to_user32(si32, si); + if (request == PTRACE_GETSIGINFO) { + if (copy_from_user(&ssi, si, sizeof(siginfo_t))) + return -EFAULT; + ret = copy_siginfo_to_user32(si32, &ssi); + } return ret; } |