diff options
| author | Alexander Potapenko <glider@google.com> | 2020-05-14 13:40:13 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2020-05-14 13:40:13 +1000 |
| commit | aca969cacf07f41070d788ce2b8ca71f09d5207d (patch) | |
| tree | f9a58b5aefbac3c8547e5fa68df80affa53d4673 | |
| parent | 32db14b6f43bd602e00abebde25340e1524be830 (diff) | |
| download | linux-next-aca969cacf07f41070d788ce2b8ca71f09d5207d.tar.gz | |
fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
Notice: this object is not reachable from any branch.
KMSAN reported uninitialized data being written to disk when dumping core.
As a result, several kilobytes of kmalloc memory may be written to the
core file and then read by a non-privileged user.
Link: http://lkml.kernel.org/r/20200419100848.63472-1-glider@google.com
Link: https://github.com/google/kmsan/issues/76
Signed-off-by: Alexander Potapenko <glider@google.com>
Reported-by: sam <sunhaoyl@outlook.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Notice: this object is not reachable from any branch.
| -rw-r--r-- | fs/binfmt_elf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index fb76970290466..1a8b0c74f5b0c 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1729,7 +1729,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t, (!regset->active || regset->active(t->task, regset) > 0)) { int ret; size_t size = regset_size(t->task, regset); - void *data = kmalloc(size, GFP_KERNEL); + void *data = kzalloc(size, GFP_KERNEL); if (unlikely(!data)) return 0; ret = regset->get(t->task, regset, |
