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linux-user/syscall.c: Enforce pselect6 sigset size restrictions

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Enforce the same restriction on the size of the sigset passed to
pselect6 as the Linux kernel does. This is both correct and silences
a gcc 4.6 warning about a write-only variable.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2011-06-28 12:21:57 +01:00 committed by Riku Voipio
parent 163a05a839
commit 8f04eeb3c0
1 changed files with 5 additions and 0 deletions
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5
linux-user/syscall.c
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@ -5699,6 +5699,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
if (arg_sigset) { if (arg_sigset) {
sig.set = &set; sig.set = &set;
if (arg_sigsize != sizeof(*target_sigset)) {
/* Like the kernel, we enforce correct size sigsets */
ret = -TARGET_EINVAL;
goto fail;
}
target_sigset = lock_user(VERIFY_READ, arg_sigset, target_sigset = lock_user(VERIFY_READ, arg_sigset,
sizeof(*target_sigset), 1); sizeof(*target_sigset), 1);
if (!target_sigset) { if (!target_sigset) {