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__crt_aligned_alloc_offset(): fix ov_index for backing allocation address

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Wrong value of ov_index resulted in magic check failure, and refuse to
free() the memory allocated with __crt_aligned_alloc_offset().
Then the TLS segments of exited threads leaked.

Reported and tested by:	glebius
Fixes:	c29ee08204
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
This commit is contained in:
Konstantin Belousov 2023-09-06 16:50:27 +03:00
parent b7528b16c6
commit 03a7c36ddb
1 changed files with 1 additions and 1 deletions
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2
libexec/rtld-elf/rtld_malloc.c
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@ -188,7 +188,7 @@ __crt_aligned_alloc_offset(size_t align, size_t size, size_t offset)
x += offset;
ov = cp2op((void *)x);
ov1.ov_magic = AMAGIC;
ov1.ov_index = x - (uintptr_t)mem - sizeof(union overhead);
ov1.ov_index = x - (uintptr_t)mem + sizeof(union overhead);
memcpy(ov, &ov1, sizeof(ov1));
return ((void *)x);
}