From ecc2bc8ac03884266cf73f8a2a42b911465b2fbc Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Mon, 23 May 2016 16:25:39 -0700 Subject: mm, elf: handle vm_brk error load_elf_library doesn't handle vm_brk failure although nothing really indicates it cannot do that because the function is allowed to fail due to vm_mmap failures already. This might be not a problem now but later patch will make vm_brk killable (resp. mmap_sem for write waiting will become killable) and so the failure will be more probable. Signed-off-by: Michal Hocko Acked-by: Vlastimil Babka Cc: Alexander Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/binfmt_elf.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 56224ffa94d2..938fc4ede764 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1176,8 +1176,11 @@ static int load_elf_library(struct file *file) len = ELF_PAGESTART(eppnt->p_filesz + eppnt->p_vaddr + ELF_MIN_ALIGN - 1); bss = eppnt->p_memsz + eppnt->p_vaddr; - if (bss > len) - vm_brk(len, bss - len); + if (bss > len) { + error = vm_brk(len, bss - len); + if (BAD_ADDR(error)) + goto out_free_ph; + } error = 0; out_free_ph: -- cgit v1.2.1