From: Dmitry Vyukov <dvyukov@google.com>
To: akpm@linux-foundation.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
syzkaller@googlegroups.com,
Alexander Potapenko <glider@google.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Quentin Casasnovas <quentin.casasnovas@oracle.com>
Subject: [PATCH] kcov: fix comparison callback signature
Date: Thu, 7 Dec 2017 11:11:34 +0100 [thread overview]
Message-ID: <20171207101134.107168-1-dvyukov@google.com> (raw)
Fix a silly copy-paste bug.
We truncated u32 args to u16.
Fixes: ded97d2c2b2c ("kcov: support comparison operands collection")
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: syzkaller@googlegroups.com
Cc: Alexander Potapenko <glider@google.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
---
kernel/kcov.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/kcov.c b/kernel/kcov.c
index 15f33faf4013..7594c033d98a 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -157,7 +157,7 @@ void notrace __sanitizer_cov_trace_cmp2(u16 arg1, u16 arg2)
}
EXPORT_SYMBOL(__sanitizer_cov_trace_cmp2);
-void notrace __sanitizer_cov_trace_cmp4(u16 arg1, u16 arg2)
+void notrace __sanitizer_cov_trace_cmp4(u32 arg1, u32 arg2)
{
write_comp_data(KCOV_CMP_SIZE(2), arg1, arg2, _RET_IP_);
}
@@ -183,7 +183,7 @@ void notrace __sanitizer_cov_trace_const_cmp2(u16 arg1, u16 arg2)
}
EXPORT_SYMBOL(__sanitizer_cov_trace_const_cmp2);
-void notrace __sanitizer_cov_trace_const_cmp4(u16 arg1, u16 arg2)
+void notrace __sanitizer_cov_trace_const_cmp4(u32 arg1, u32 arg2)
{
write_comp_data(KCOV_CMP_SIZE(2) | KCOV_CMP_CONST, arg1, arg2,
_RET_IP_);
--
2.15.1.424.g9478a66081-goog
--
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reply other threads:[~2017-12-07 10:11 UTC|newest]
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