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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-03 21:45:17 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-19 17:56:01 -0400 |
| commit | 3968cf623892d710e651070243fd16af312a9797 (patch) | |
| tree | 273164e59b53074a9330aa12d2764d0fc28ea245 /kernel/compat.c | |
| parent | b8e8e1aa9f14110da180569908bbe538c9e9dc63 (diff) | |
| download | lwn-3968cf623892d710e651070243fd16af312a9797.tar.gz lwn-3968cf623892d710e651070243fd16af312a9797.zip | |
get_compat_sigset()
similar to put_compat_sigset()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/compat.c')
| -rw-r--r-- | kernel/compat.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index d43b18031116..a46a4a40bb8b 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -467,17 +467,26 @@ Efault: return -EFAULT; } -void -sigset_from_compat(sigset_t *set, const compat_sigset_t *compat) +int +get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat) { +#ifdef __BIG_ENDIAN + compat_sigset_t v; + if (copy_from_user(&v, compat, sizeof(compat_sigset_t))) + return -EFAULT; switch (_NSIG_WORDS) { - case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); - case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); - case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); - case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); + case 4: set->sig[3] = v.sig[6] | (((long)v.sig[7]) << 32 ); + case 3: set->sig[2] = v.sig[4] | (((long)v.sig[5]) << 32 ); + case 2: set->sig[1] = v.sig[2] | (((long)v.sig[3]) << 32 ); + case 1: set->sig[0] = v.sig[0] | (((long)v.sig[1]) << 32 ); } +#else + if (copy_from_user(set, compat, sizeof(compat_sigset_t))) + return -EFAULT; +#endif + return 0; } -EXPORT_SYMBOL_GPL(sigset_from_compat); +EXPORT_SYMBOL_GPL(get_compat_sigset); int put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, |