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Author: He Zhe
Email: zhe.he@windriver.com
Subject: arm64/perf: Fix wrong cast that may cause wrong truncation
Date: Fri, 21 Aug 2020 00:52:50 +0800
tail is a pointer while buftail.fp is a u32.
arch/arm64/kernel/perf_callchain.c:100:6: warning: cast from pointer to
integer of different size [-Wpointer-to-int-cast]
100 | if ((u32)tail + 4 >= buftail.fp)
| ^
arch/arm64/kernel/perf_callchain.c:103:9: warning: cast to pointer from
integer of different size [-Wint-to-pointer-cast]{noformat}
103 | return (struct compat_frame_tail __user *)(buftail.fp - 4);
| ^
Fixes: 8818670c17d2 ("arm64/perf: fix backtrace for AAPCS with FP enabled")
Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
]
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Bruce Ashfield