efi/printf: Turn vsprintf into vsnprintf

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Implement vsnprintf instead of vsprintf to avoid the possibility of a
buffer overflow.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200518190716.751506-17-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

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Arvind Sankar 2020-05-18 15:07:08 -04:00 • committed by Ard Biesheuvel

parent f97ca2c816

commit 8fb331e10b

2 changed files with 30 additions and 18 deletions

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6

drivers/firmware/efi/libstub/efi-stub-helper.c

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42

drivers/firmware/efi/libstub/vsprintf.c

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