From: Noam Camus <noamc@xxxxxxxxxx> Today bss/heap is placed above last loaded sections. However if STACK_TOP is not equal to TASK_SIZE we wish to ignore such sections mapped to this gap between STACK_TOP and TASK_SIZE. set_brk will never work for such case. So at the moment this addition is just a sanity check. An alternative (more complex): Linux would make use of LMA field in ELF, then we can set VMA below STACK_TOP and set LMA to be between STACK_TOP and TASK_SIZE to match such special memory mapping. Signed-off-by: Noam Camus <noamc@xxxxxxxxxx> --- fs/binfmt_elf.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 241ef68..09f9483 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -962,6 +962,9 @@ static int load_elf_binary(struct linux_binprm *bprm) k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; + if (k >= STACK_TOP) + continue; + if (k > elf_bss) elf_bss = k; if ((elf_ppnt->p_flags & PF_X) && end_code < k) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
