Commit 40724eca authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Ingo Molnar
Browse files

rseq: Fix rseq unregistration regression 



A logic inversion in rseq_reset_rseq_cpu_node_id() causes the rseq
unregistration to fail when rseq_validate_ro_fields() succeeds rather
than the opposite.

This affects both CONFIG_DEBUG_RSEQ=y and CONFIG_DEBUG_RSEQ=n.

Fixes: 7d5265ff ("rseq: Validate read-only fields under DEBUG_RSEQ config")
Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250116205956.836074-1-mathieu.desnoyers@efficios.com
parent 7d9da040

kernel/rseq.c

+1 −1
Original line number Diff line number Diff line
@@ -201,7 +201,7 @@ static int rseq_reset_rseq_cpu_node_id(struct task_struct *t) 
	/*

	 * Validate read-only rseq fields.

	 */

	if (!rseq_validate_ro_fields(t))

	if (rseq_validate_ro_fields(t))

		return -EFAULT;

	/*

	 * Reset cpu_id_start to its initial state (0).