| From | Michal Hocko <> | Subject | [PATCH 05/18] mm, elf: handle vm_brk error | Date | Mon, 29 Feb 2016 14:26:44 +0100 |
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From: Michal Hocko <mhocko@suse.com>
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.
Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Hocko <mhocko@suse.com> --- fs/binfmt_elf.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 7d914c67a9d0..2e45ae57ea88 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: -- 2.7.0
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