forked from Lainports/freebsd-ports
662466ff63
PR: 232932 Reported by: gerald Approved by: gerald Differential Revision: https://reviews.freebsd.org/D17832
18 lines
625 B
C
18 lines
625 B
C
--- libelf/elf_update.c.orig 2018-09-14 03:23:36.000000000 -0700
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+++ libelf/elf_update.c
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@@ -106,9 +106,13 @@
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if (elf->cmd == ELF_C_RDWR_MMAP
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&& (size_t) size > elf->maximum_size)
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{
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- if (mremap (elf->map_address, elf->maximum_size,
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- size, 0) == MAP_FAILED)
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+ if (munmap (elf->map_address, elf->maximum_size) != 0 ||
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+ mmap (elf->map_address, size, PROT_READ | PROT_WRITE,
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+ MAP_SHARED | MAP_FIXED | MAP_EXCL, elf->fildes,
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+ 0) == MAP_FAILED)
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{
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+ elf->map_address = NULL;
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+ elf->flags &= ~ELF_F_MMAPPED;
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__libelf_seterrno (ELF_E_WRITE_ERROR);
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return -1;
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}
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