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In preparation to enabling -Wvla, remove VLA and replace it with dynamic memory allocation instead. The use of stack Variable Length Arrays needs to be avoided, as they can be a vector for stack exhaustion, which can be both a runtime bug or a security flaw. Also, in general, as code evolves it is easy to lose track of how big a VLA can get. Thus, we can end up having runtime failures that are hard to debug. Also, fixed as part of the directive to remove all VLAs from the kernel: https://lkml.org/lkml/2018/3/7/621 Notice that in this particular case, an alternative to kzalloc is kcalloc, in which case the code would look as follows instead: iv = kcalloc(crypto_skcipher_ivsize(tfm_cbc), sizeof(*iv), GFP_KERNEL); but if the data type of _iv_ never changes, or the type size is always one byte, kzalloc is good enough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| cbaf.c | ||
| crypto.c | ||
| dev-sysfs.c | ||
| devconnect.c | ||
| Kconfig | ||
| Makefile | ||
| mmc.c | ||
| pal.c | ||
| reservation.c | ||
| rh.c | ||
| security.c | ||
| wa-hc.c | ||
| wa-hc.h | ||
| wa-nep.c | ||
| wa-rpipe.c | ||
| wa-xfer.c | ||
| wusbhc.c | ||
| wusbhc.h | ||