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Merge tag 'v5.4-rc7' into android-mainline

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Linux 5.4-rc7

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I505207a0a6f68ccc3519d7f190d8faf25d9d479a
This commit is contained in:
Greg Kroah-Hartman
2019-11-11 06:10:55 +01:00
parent 8c36c8518c 31f4f5b495
commit 682d8bf784
293 changed files with 5489 additions and 1067 deletions
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33
kernel/fork.c
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@@ -2568,7 +2568,35 @@ noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs,
return 0;
}
static bool clone3_args_valid(const struct kernel_clone_args *kargs)
/**
* clone3_stack_valid - check and prepare stack
* @kargs: kernel clone args
*
* Verify that the stack arguments userspace gave us are sane.
* In addition, set the stack direction for userspace since it's easy for us to
* determine.
*/
static inline bool clone3_stack_valid(struct kernel_clone_args *kargs)
{
if (kargs->stack == 0) {
if (kargs->stack_size > 0)
return false;
} else {
if (kargs->stack_size == 0)
return false;
if (!access_ok((void __user *)kargs->stack, kargs->stack_size))
return false;
#if !defined(CONFIG_STACK_GROWSUP) && !defined(CONFIG_IA64)
kargs->stack += kargs->stack_size;
#endif
}
return true;
}
static bool clone3_args_valid(struct kernel_clone_args *kargs)
{
/*
* All lower bits of the flag word are taken.
@@ -2588,6 +2616,9 @@ static bool clone3_args_valid(const struct kernel_clone_args *kargs)
kargs->exit_signal)
return false;
if (!clone3_stack_valid(kargs))
return false;
return true;
}