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devmatch: Catch truncated linker hints files

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PR:		282268
Reviewed by:	christos, imp
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D47243

(cherry picked from commit 9b2f2fbfcbc51f77e96a41e62b1c06a8ccd4ca15)
This commit is contained in:
Mark Johnston 2024-10-23 16:55:16 +00:00
parent bf2145f361
commit 4990a7d344
1 changed files with 6 additions and 0 deletions
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6
sbin/devmatch/devmatch.c
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@ -127,6 +127,12 @@ read_linker_hints(void)
err(1, "Can't open %s for reading", fn);
}
if (len < sizeof(int)) {
warnx("Linker hints file too short.");
free(hints);
hints = NULL;
return;
}
if (*(int *)(intptr_t)hints != LINKER_HINTS_VERSION) {
warnx("Linker hints version %d doesn't match expected %d.",
*(int *)(intptr_t)hints, LINKER_HINTS_VERSION);