[V2 PATCH] an alignment bug when both LD_PRELOAD and
HUGETLB_FORCE_ELFMAP are enabled
If program header's p_vaddr is aligned with hpage size, hugetlb_slice_end(vaddr)
returns vaddr-1, and thus such a error appears,
INFO: Segment 2's aligned memsz is too small: 0x485d4 < 0xffffffff
slice_end should point to the correct end address of next slice.
Signed-off-by: Lans Zhang <jia.zhang2...@gmail.com>
---
elflink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/elflink.c
+++ b/elflink.c
@@ -765,14 +765,14 @@
*/
vaddr = hugetlb_next_slice_start(info->dlpi_phdr[i].p_vaddr);
gap = vaddr - info->dlpi_phdr[i].p_vaddr;
- slice_end = hugetlb_slice_end(vaddr);
+ slice_end = hugetlb_slice_end(vaddr + 1);
/*
* we should stop remapping just before the slice
* containing the end of the memsz portion (taking away
* the gap of the memsz)
*/
memsz = info->dlpi_phdr[i].p_memsz;
- if (memsz < gap) {
+ if (memsz <= gap) {
INFO("Segment %d's unaligned memsz is too small: "
"%#0lx < %#0lx\n",
i, memsz, gap);
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