Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
select: Convert to scoped user access
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
authored by
Thomas Gleixner
and committed by
Ingo Molnar
3ce17e69
e02718c9
+4
-8
+4
-8
fs/select.c
+4
-8
fs/select.c
···
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{
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// the path is hot enough for overhead of copy_from_user() to matter
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if (from) {
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-
if (can_do_masked_user_access())
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from = masked_user_access_begin(from);
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else if (!user_read_access_begin(from, sizeof(*from)))
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return -EFAULT;
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unsafe_get_user(to->p, &from->p, Efault);
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unsafe_get_user(to->size, &from->size, Efault);
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user_read_access_end();
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scoped_user_read_access(from, Efault) {
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unsafe_get_user(to->p, &from->p, Efault);
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unsafe_get_user(to->size, &from->size, Efault);
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}
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}
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return 0;
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Efault:
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user_read_access_end();
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return -EFAULT;
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}
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