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| author | Yao Zi <ziyao@disroot.org> | 2024-11-18 03:44:47 +0000 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2025-02-09 09:03:50 -0500 |
| commit | 5ccf05d86dacba0e6542ae1a6b6508a41cfe326e (patch) | |
| tree | c2e48736a9650935642a39a600338b7766473cd5 | |
| parent | 1a98576401ff604ff06a030a3644e2780b2a837d (diff) | |
| download | musl-5ccf05d86dacba0e6542ae1a6b6508a41cfe326e.tar.gz | |
ldso: don't reclaim zero-memory-sized segments
Some weird linkers may emit PT_LOAD segments with memsz = 0. ELF
specification does not forbid this, but such a segment with non-zero
p_vaddr will result in reclaiming of invalid memory address.
This patch skips such segments during reclaiming for better
compatibility.
| -rw-r--r-- | ldso/dynlink.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ldso/dynlink.c b/ldso/dynlink.c index 3b57c07f..715948f4 100644 --- a/ldso/dynlink.c +++ b/ldso/dynlink.c @@ -616,6 +616,7 @@ static void reclaim_gaps(struct dso *dso) for (; phcnt--; ph=(void *)((char *)ph+dso->phentsize)) { if (ph->p_type!=PT_LOAD) continue; if ((ph->p_flags&(PF_R|PF_W))!=(PF_R|PF_W)) continue; + if (ph->p_memsz == 0) continue; reclaim(dso, ph->p_vaddr & -PAGE_SIZE, ph->p_vaddr); reclaim(dso, ph->p_vaddr+ph->p_memsz, ph->p_vaddr+ph->p_memsz+PAGE_SIZE-1 & -PAGE_SIZE); |