diff options
| author | Su Hui <suhui@nfschina.com> | 2023-11-30 06:40:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-13 20:45:21 +0300 |
| commit | 1cdc934c82bbd45cf81a9ce58704fa23156f8ff3 (patch) | |
| tree | f5ef943dccb43c549c8fb814f97c5722e4f3d7c2 /include/linux | |
| parent | 56a334310fa9dabf466ac74a59adc65ef018e10d (diff) | |
| download | linux-1cdc934c82bbd45cf81a9ce58704fa23156f8ff3.tar.xz | |
highmem: fix a memory copy problem in memcpy_from_folio
commit 73424d00dc63ba681856e06cfb0a5abbdb62e2b5 upstream.
Clang static checker complains that value stored to 'from' is never read.
And memcpy_from_folio() only copy the last chunk memory from folio to
destination. Use 'to += chunk' to replace 'from += chunk' to fix this
typo problem.
Link: https://lkml.kernel.org/r/20231130034017.1210429-1-suhui@nfschina.com
Fixes: b23d03ef7af5 ("highmem: add memcpy_to_folio() and memcpy_from_folio()")
Signed-off-by: Su Hui <suhui@nfschina.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jiaqi Yan <jiaqiyan@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Tom Rix <trix@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/highmem.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 99c474de800d..75607d4ba26c 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -454,7 +454,7 @@ static inline void memcpy_from_folio(char *to, struct folio *folio, memcpy(to, from, chunk); kunmap_local(from); - from += chunk; + to += chunk; offset += chunk; len -= chunk; } while (len > 0); |