diff options
| author | Alexander Potapenko <[email protected]> | 2020-05-27 22:20:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-05-28 11:35:40 -0700 |
| commit | 1d605416fb7175e1adf094251466caa52093b413 (patch) | |
| tree | 0116d920c5facf13b63774d9e9a9248748075924 | |
| parent | 6988f31d558aa8c744464a7f6d91d34ada48ad12 (diff) | |
fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
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.
Reported-by: sam <[email protected]>
Signed-off-by: Alexander Potapenko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Kees Cook <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Link: https://github.com/google/kmsan/issues/76
Signed-off-by: Linus Torvalds <[email protected]>
| -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 13f25e241ac4..25d489bc9453 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1733,7 +1733,7 @@ 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, |