path: root/arch/tile
diff options
authorEric W. Biederman <ebiederm@xmission.com>2017-07-31 17:15:31 -0500
committerEric W. Biederman <ebiederm@xmission.com>2018-01-15 17:55:59 -0600
commit212a36a17efe4d696d1e3c31ebd79a9fb0cbb14b (patch)
tree943b3454aad156b37e2396ac314e6afc2d43c84c /arch/tile
parent56b81456f4ee048699f72edc02b369a33d1b94e6 (diff)
signal: Unify and correct copy_siginfo_from_user32
The function copy_siginfo_from_user32 is used for two things, in ptrace since the dawn of siginfo for arbirarily modifying a signal that user space sees, and in sigqueueinfo to send a signal with arbirary siginfo data. Create a single copy of copy_siginfo_from_user32 that all architectures share, and teach it to handle all of the cases in the siginfo union. In the generic version of copy_siginfo_from_user32 ensure that all of the fields in siginfo are initialized so that the siginfo structure can be safely copied to userspace if necessary. When copying the embedded sigval union copy the si_int member. That ensures the 32bit values passes through the kernel unchanged. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/tile')
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index 971d87a1d8cf..4e7f40a10eb3 100644
--- a/arch/tile/kernel/compat_signal.c
+++ b/arch/tile/kernel/compat_signal.c
@@ -105,24 +105,6 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *fr
return err;
-int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
- int err;
- if (!access_ok(VERIFY_READ, from, sizeof(struct compat_siginfo)))
- return -EFAULT;
- err = __get_user(to->si_signo, &from->si_signo);
- err |= __get_user(to->si_errno, &from->si_errno);
- err |= __get_user(to->si_code, &from->si_code);
- err |= __get_user(to->si_pid, &from->si_pid);
- err |= __get_user(to->si_uid, &from->si_uid);
- err |= __get_user(to->si_int, &from->si_int);
- return err;
/* The assembly shim for this function arranges to ignore the return value. */
long compat_sys_rt_sigreturn(void)

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