From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"Paul E . McKenney" <paulmck@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
"H . Peter Anvin" <hpa@zytor.com>, Paul Turner <pjt@google.com>,
linux-api@vger.kernel.org, Christian Brauner <brauner@kernel.org>,
Florian Weimer <fw@deneb.enyo.de>,
David.Laight@ACULAB.COM, carlos@redhat.com,
Peter Oskolkov <posk@posk.io>,
Alexander Mikhalitsyn <alexander@mihalicyn.com>,
Chris Kennelly <ckennelly@google.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Nathan Chancellor <nathan@kernel.org>
Subject: [RFC PATCH tip] rseq: Fix: Increase AT_VECTOR_SIZE_BASE to match rseq auxvec entries
Date: Wed, 4 Jan 2023 14:20:54 -0500 [thread overview]
Message-ID: <20230104192054.34046-1-mathieu.desnoyers@efficios.com> (raw)
Two new auxiliary vector entries are introduced for rseq without
matching increment of the AT_VECTOR_SIZE_BASE, which causes failures
with CONFIG_HARDENED_USERCOPY=y.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/Y7XJKZhuU9VJZQ11@dev-arch.thelio-3990X
Fixes: 317c8194e6ae ("rseq: Introduce feature size and alignment ELF auxiliary vector entries")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
include/linux/auxvec.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/auxvec.h b/include/linux/auxvec.h
index f68d0ec2d740..407f7005e6d6 100644
--- a/include/linux/auxvec.h
+++ b/include/linux/auxvec.h
@@ -4,6 +4,6 @@
#include <uapi/linux/auxvec.h>
-#define AT_VECTOR_SIZE_BASE 20 /* NEW_AUX_ENT entries in auxiliary table */
+#define AT_VECTOR_SIZE_BASE 22 /* NEW_AUX_ENT entries in auxiliary table */
/* number of "#define AT_.*" above, minus {AT_NULL, AT_IGNORE, AT_NOTELF} */
#endif /* _LINUX_AUXVEC_H */
--
2.25.1
next reply other threads:[~2023-01-04 19:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-04 19:20 Mathieu Desnoyers [this message]
2023-01-04 19:24 ` Nathan Chancellor
2023-01-11 14:15 ` Peter Zijlstra
2023-01-12 15:18 ` [tip: sched/core] rseq: " tip-bot2 for Mathieu Desnoyers
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