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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2023-10-09 21:42:05 +0300 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2023-10-23 13:24:52 +0300 |
| commit | 4c99885d592ea53f9d4872595858e3f14eaf0823 (patch) | |
| tree | 785d1366a92aad9cdd69c89beaa638960a6b72ca /drivers/media | |
| parent | 0768a9dd809ef52440b5df7dce5a1c1c7e97abbd (diff) | |
| download | linux-4c99885d592ea53f9d4872595858e3f14eaf0823.tar.xz | |
media: venus: hfi_cmds: Replace one-element array with flex-array member and use __counted_by
Array `data` in `struct hfi_sfr` is being used as a fake flexible array
at run-time:
drivers/media/platform/qcom/venus/hfi_venus.c:
1033 p = memchr(sfr->data, '\0', sfr->buf_size);
1034 /*
1035 * SFR isn't guaranteed to be NULL terminated since SYS_ERROR indicates
1036 * that Venus is in the process of crashing.
1037 */
1038 if (!p)
1039 sfr->data[sfr->buf_size - 1] = '\0';
1040
1041 dev_err_ratelimited(dev, "SFR message from FW: %s\n", sfr->data);
Fake flexible arrays are deprecated, and should be replaced by
flexible-array members. So, replace one-element array with a
flexible-array member in `struct hfi_sfr`.
While there, also annotate array `data` with __counted_by() to prepare
for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for
array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
This results in no differences in binary output.
This issue was found with the help of Coccinelle, and audited and fixed
manually.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/qcom/venus/hfi_cmds.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h index dd9c5066442d..20acd412ee7b 100644 --- a/drivers/media/platform/qcom/venus/hfi_cmds.h +++ b/drivers/media/platform/qcom/venus/hfi_cmds.h @@ -242,7 +242,7 @@ struct hfi_session_parse_sequence_header_pkt { struct hfi_sfr { u32 buf_size; - u8 data[1]; + u8 data[] __counted_by(buf_size); }; struct hfi_sys_test_ssr_pkt { |