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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-06 17:27:14 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-06 17:27:14 -0700 |
commit | 285767604576148fc1be7fcd112e4a90eb0d6ad2 (patch) | |
tree | b4c611689f95e1a2ba0fe7b6407e05469251fc2f /drivers/misc | |
parent | 5eb6eed7e0fe880dc8de8da203cc888716bbf196 (diff) | |
parent | 0ed2dd03b94b7b7f66e23f25073b5385d0416589 (diff) | |
download | linux-285767604576148fc1be7fcd112e4a90eb0d6ad2.tar.bz2 |
Merge tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull overflow updates from Kees Cook:
"This adds the new overflow checking helpers and adds them to the
2-factor argument allocators. And this adds the saturating size
helpers and does a treewide replacement for the struct_size() usage.
Additionally this adds the overflow testing modules to make sure
everything works.
I'm still working on the treewide replacements for allocators with
"simple" multiplied arguments:
*alloc(a * b, ...) -> *alloc_array(a, b, ...)
and
*zalloc(a * b, ...) -> *calloc(a, b, ...)
as well as the more complex cases, but that's separable from this
portion of the series. I expect to have the rest sent before -rc1
closes; there are a lot of messy cases to clean up.
Summary:
- Introduce arithmetic overflow test helper functions (Rasmus)
- Use overflow helpers in 2-factor allocators (Kees, Rasmus)
- Introduce overflow test module (Rasmus, Kees)
- Introduce saturating size helper functions (Matthew, Kees)
- Treewide use of struct_size() for allocators (Kees)"
* tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
treewide: Use struct_size() for devm_kmalloc() and friends
treewide: Use struct_size() for vmalloc()-family
treewide: Use struct_size() for kmalloc()-family
device: Use overflow helpers for devm_kmalloc()
mm: Use overflow helpers in kvmalloc()
mm: Use overflow helpers in kmalloc_array*()
test_overflow: Add memory allocation overflow tests
overflow.h: Add allocation size calculation helpers
test_overflow: Report test failures
test_overflow: macrofy some more, do more tests for free
lib: add runtime test of check_*_overflow functions
compiler.h: enable builtin overflow checkers and add fallback code
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/cb710/core.c | 4 | ||||
-rw-r--r-- | drivers/misc/vexpress-syscfg.c | 3 |
2 files changed, 3 insertions, 4 deletions
diff --git a/drivers/misc/cb710/core.c b/drivers/misc/cb710/core.c index fb397e7d1cce..4d4acf763b65 100644 --- a/drivers/misc/cb710/core.c +++ b/drivers/misc/cb710/core.c @@ -232,8 +232,8 @@ static int cb710_probe(struct pci_dev *pdev, if (val & CB710_SLOT_SM) ++n; - chip = devm_kzalloc(&pdev->dev, - sizeof(*chip) + n * sizeof(*chip->slot), GFP_KERNEL); + chip = devm_kzalloc(&pdev->dev, struct_size(chip, slot, n), + GFP_KERNEL); if (!chip) return -ENOMEM; diff --git a/drivers/misc/vexpress-syscfg.c b/drivers/misc/vexpress-syscfg.c index 9eea30f54fd6..80a6f199077c 100644 --- a/drivers/misc/vexpress-syscfg.c +++ b/drivers/misc/vexpress-syscfg.c @@ -182,8 +182,7 @@ static struct regmap *vexpress_syscfg_regmap_init(struct device *dev, val = energy_quirk; } - func = kzalloc(sizeof(*func) + sizeof(*func->template) * num, - GFP_KERNEL); + func = kzalloc(struct_size(func, template, num), GFP_KERNEL); if (!func) return ERR_PTR(-ENOMEM); |