The patch titled
Subject: kcov: fix comparison callback signature
has been added to the -mm tree. Its filename is
kcov-fix-comparison-callback-signature.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kcov-fix-comparison-callback-signature.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kcov-fix-comparison-callback-signature.patch
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------------------------------------------------------
From: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Subject: kcov: fix comparison callback signature
Fix a silly copy-paste bug. We truncated u32 args to u16.
Link: http://lkml.kernel.org/r/20171207101134.107168-1-dvyukov@xxxxxxxxxx
Fixes: ded97d2c2b2c ("kcov: support comparison operands collection")
Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: syzkaller@xxxxxxxxxxxxxxxx
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
Cc: Quentin Casasnovas <quentin.casasnovas@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN kernel/kcov.c~kcov-fix-comparison-callback-signature kernel/kcov.c
--- a/kernel/kcov.c~kcov-fix-comparison-callback-signature
+++ a/kernel/kcov.c
@@ -157,7 +157,7 @@ void notrace __sanitizer_cov_trace_cmp2(
}
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
}
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_);
_
Patches currently in -mm which might be from dvyukov@xxxxxxxxxx are
kcov-fix-comparison-callback-signature.patch
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