diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-18 22:35:51 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-18 22:35:51 +0300 |
commit | 5e857ce6eae7ca21b2055cca4885545e29228fe2 (patch) | |
tree | b3b5b9a88222fe189ba44989a84932c7258c64c4 /fs | |
parent | 670d0a4b10704667765f7d18f7592993d02783aa (diff) | |
parent | 0c389d89abc28edf70ae847ee2fa55acb267b826 (diff) | |
download | linux-5e857ce6eae7ca21b2055cca4885545e29228fe2.tar.xz |
Merge branch 'hch' (maccess patches from Christoph Hellwig)
Merge non-faulting memory access cleanups from Christoph Hellwig:
"Andrew and I decided to drop the patches implementing your suggested
rename of the probe_kernel_* and probe_user_* helpers from -mm as
there were way to many conflicts.
After -rc1 might be a good time for this as all the conflicts are
resolved now"
This also adds a type safety checking patch on top of the renaming
series to make the subtle behavioral difference between 'get_user()' and
'get_kernel_nofault()' less potentially dangerous and surprising.
* emailed patches from Christoph Hellwig <hch@lst.de>:
maccess: make get_kernel_nofault() check for minimal type compatibility
maccess: rename probe_kernel_address to get_kernel_nofault
maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
Diffstat (limited to 'fs')
-rw-r--r-- | fs/proc/kcore.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 8ba492d44e68..e502414b3556 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -512,7 +512,8 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) * Using bounce buffer to bypass the * hardened user copy kernel text checks. */ - if (probe_kernel_read(buf, (void *) start, tsz)) { + if (copy_from_kernel_nofault(buf, (void *)start, + tsz)) { if (clear_user(buffer, tsz)) { ret = -EFAULT; goto out; |