linux-kernel - [tip: sched/core] rseq: Increase AT_VECTOR_SIZE

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Message-ID: <167353671841.4906.17789590364136749401.tip-bot2@tip-bot2>
Date:   Thu, 12 Jan 2023 15:18:38 -0000
From:   "tip-bot2 for Mathieu Desnoyers" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] rseq: Increase AT_VECTOR_SIZE_BASE to match rseq
 auxvec entries

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     28c8e088427ad30b4260953f3b6f908972b77c2d
Gitweb:        https://git.kernel.org/tip/28c8e088427ad30b4260953f3b6f908972b77c2d
Author:        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
AuthorDate:    Wed, 04 Jan 2023 14:20:54 -05:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 12 Jan 2023 11:22:22 +01:00

rseq: Increase AT_VECTOR_SIZE_BASE to match rseq auxvec entries

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.

Fixes: 317c8194e6ae ("rseq: Introduce feature size and alignment ELF auxiliary vector entries")
Reported-by: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Tested-by: Nathan Chancellor <nathan@...nel.org>
Link: https://lore.kernel.org/r/20230104192054.34046-1-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 f68d0ec..407f700 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 */