git: 00df149452bf - stable/13 - crt_malloc: more accurate handling of mmap(2) failure
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Date: Sat, 23 Oct 2021 01:12:28 UTC
The branch stable/13 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=00df149452bfd1b9eee9acba842bb6bc874c5ae3 commit 00df149452bfd1b9eee9acba842bb6bc874c5ae3 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-10-15 17:59:37 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-10-22 23:32:27 +0000 crt_malloc: more accurate handling of mmap(2) failure PR: 259076 (cherry picked from commit 73dddffc3175581ba99f6ced9a2e508a0e880e59) --- libexec/rtld-elf/rtld_malloc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libexec/rtld-elf/rtld_malloc.c b/libexec/rtld-elf/rtld_malloc.c index 64218b5bb786..63fa6f5e2ee7 100644 --- a/libexec/rtld-elf/rtld_malloc.c +++ b/libexec/rtld-elf/rtld_malloc.c @@ -271,21 +271,21 @@ morepages(int n) } } - if (pagepool_start == MAP_FAILED) - pagepool_start = 0; offset = (uintptr_t)pagepool_start - rounddown2( (uintptr_t)pagepool_start, pagesz); - pagepool_start = mmap(0, n * pagesz, PROT_READ | PROT_WRITE, + addr = mmap(0, n * pagesz, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); - if (pagepool_start == MAP_FAILED) { + if (addr == MAP_FAILED) { #ifdef IN_RTLD rtld_fdprintf(STDERR_FILENO, _BASENAME_RTLD ": morepages: " "cannot mmap anonymous memory: %s\n", rtld_strerror(errno)); #endif + pagepool_start = pagepool_end = NULL; return (0); } + pagepool_start = addr; pagepool_end = pagepool_start + n * pagesz; pagepool_start += offset;