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select: Convert to scoped user access

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Replace the open coded implementation with the scoped user access guard.

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20251027083745.862419776@linutronix.de
This commit is contained in:
Thomas Gleixner
2025-10-27 09:44:04 +01:00
committed by Ingo Molnar
parent e02718c986
commit 3ce17e6909
1 changed files with 4 additions and 8 deletions
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12
fs/select.c
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@@ -776,17 +776,13 @@ static inline int get_sigset_argpack(struct sigset_argpack *to,
{
// the path is hot enough for overhead of copy_from_user() to matter
if (from) {
if (can_do_masked_user_access())
from = masked_user_access_begin(from);
else if (!user_read_access_begin(from, sizeof(*from)))
return -EFAULT;
unsafe_get_user(to->p, &from->p, Efault);
unsafe_get_user(to->size, &from->size, Efault);
user_read_access_end();
scoped_user_read_access(from, Efault) {
unsafe_get_user(to->p, &from->p, Efault);
unsafe_get_user(to->size, &from->size, Efault);
}
}
return 0;
Efault:
user_read_access_end();
return -EFAULT;
}