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driver core: Add __alloc_size hint to devm allocators

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Mark the devm_*alloc()-family of allocations with appropriate
__alloc_size()/__realloc_size() hints so the compiler can attempt to
reason about buffer lengths from allocations.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nishanth Menon <nm@ti.com>
Cc: Michael Kelley <mikelley@microsoft.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Won Chung <wonchung@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20221029074734.gonna.276-kees@kernel.org
This commit is contained in:
Kees Cook 2022-10-29 00:47:34 -07:00
parent 8abfff25b3
commit 74c8e6bffb
1 changed files with 4 additions and 3 deletions
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7
include/linux/device.h
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@ -197,9 +197,9 @@ void devres_remove_group(struct device *dev, void *id);
int devres_release_group(struct device *dev, void *id);
/* managed devm_k.alloc/kfree for device drivers */
void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) __malloc;
void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) __alloc_size(2);
void *devm_krealloc(struct device *dev, void *ptr, size_t size,
gfp_t gfp) __must_check;
gfp_t gfp) __must_check __realloc_size(3);
__printf(3, 0) char *devm_kvasprintf(struct device *dev, gfp_t gfp,
const char *fmt, va_list ap) __malloc;
__printf(3, 4) char *devm_kasprintf(struct device *dev, gfp_t gfp,
@ -226,7 +226,8 @@ static inline void *devm_kcalloc(struct device *dev,
void devm_kfree(struct device *dev, const void *p);
char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc;
const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);
void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp);
void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
__realloc_size(3);
unsigned long devm_get_free_pages(struct device *dev,
gfp_t gfp_mask, unsigned int order);