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fix format overflow in blackboxVirtualBeginLog (#14373)

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* cast largestLogFileNumber to 16bits to prevent format overflow

* Update src/main/blackbox/blackbox_virtual.c

remove uint16 cast

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>

* Update src/main/blackbox/blackbox_virtual.c

use snprintf instead of strlen

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>

---------

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
This commit is contained in:
Leo Garcia 2025-05-12 10:34:57 -07:00 • committed by GitHub
parent 32a7fbef5d
commit 37c921cdf0
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GPG key ID: B5690EEEBB952194
2 changed files with 4 additions and 4 deletions
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6
src/main/blackbox/blackbox_virtual.c
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@ -87,9 +87,9 @@ bool blackboxVirtualBeginLog(void)
if (blackboxVirtualFile != NULL) { if (blackboxVirtualFile != NULL) {
return false; return false;
} }
const size_t name_buffer_length = strlen(LOGFILE_PREFIX) + 5 + strlen(LOGFILE_SUFFIX) + 2; //file name template: LOG00001.BFL const size_t name_buffer_length = snprintf(NULL, 0, "%s%05u.%s", LOGFILE_PREFIX, (largestLogFileNumber + 1) % 100000, LOGFILE_SUFFIX);
char filename[name_buffer_length]; char filename[name_buffer_length];
sprintf(filename, "%s%05i.%s", LOGFILE_PREFIX, largestLogFileNumber + 1, LOGFILE_SUFFIX); snprintf(filename, sizeof(filename), "%s%05u.%s", LOGFILE_PREFIX, (largestLogFileNumber + 1) % 100000, LOGFILE_SUFFIX);
blackboxVirtualFile = fopen(filename, "w"); blackboxVirtualFile = fopen(filename, "w");
if (blackboxVirtualFile != NULL) { if (blackboxVirtualFile != NULL) {
largestLogFileNumber++; largestLogFileNumber++;
@ -111,7 +111,7 @@ void blackboxVirtualClose(void)
blackboxVirtualEndLog(); blackboxVirtualEndLog();
} }
uint32_t blackboxVirtualLogFileNumber(void) int32_t blackboxVirtualLogFileNumber(void)
{ {
return largestLogFileNumber; return largestLogFileNumber;
} }

2
src/main/blackbox/blackbox_virtual.h
View file

@ -32,4 +32,4 @@ bool blackboxVirtualFlush(void);
bool blackboxVirtualBeginLog(void); bool blackboxVirtualBeginLog(void);
bool blackboxVirtualEndLog(void); bool blackboxVirtualEndLog(void);
void blackboxVirtualClose(void); void blackboxVirtualClose(void);
uint32_t blackboxVirtualLogFileNumber(void); int32_t blackboxVirtualLogFileNumber(void);