fix: Replace device calls to memcpy with tu_memcpy_s #1852
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silvergasp
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Introduces a new function tu_memcpy_s, which is effectively a backport of memcpy_s. The change also refactors calls to memcpy over to the more secure tu_memcpy_s.
hathach
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Feb 27, 2023
| @@ -707,7 +707,7 @@ static int32_t proc_builtin_scsi(uint8_t lun, uint8_t const scsi_cmd[16], uint8_ | |||
| read_capa10.block_size = tu_htonl(block_size); | |||
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| resplen = sizeof(read_capa10); | |||
| memcpy(buffer, &read_capa10, (size_t) resplen); | |||
| TU_VERIFY(tu_memcpy_s(buffer, bufsize, &read_capa10, (size_t) resplen)); | |||
hathach
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Feb 27, 2023
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superb !! Thank you very much for the PR and sorry again for the delay. memcpy_s is a great idea to prevent memory overflow, this function is new to me. I found an instance where ==0 is not checked, to prevent such as typo, I have change the code to 0==tu_memcpy_s(), this way it is easier to spot this type of issue.
Thank again for bringing this up.
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No worries 👍 |
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For UAC class tinyusb/src/class/audio/audio_device.c Line 2293 in 34798ff I'm in vacation anyone can make a PR ? @silvergasp @hathach |
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PR here #1937 |
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Describe the PR
Introduces a new function tu_memcpy_s, which is effectively a backport of memcpy_s. The change also refactors calls to memcpy over to the more secure tu_memcpy_s.
More specifically, this change adds some bounds checking to the destination buffer, to prevent buffer overflows.
What this PR cover's;
What this PR doesn't cover;