platform/x86: hp-bioscfg: prevent a small buffer overflow

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This function escapes certain special characters like \n.  So if the
last character in the string is a '\n' then it gets changed into two
characters '\' and '\n'.  But maybe we only have space for the '\' so
we need to check for that.

The "conv_dst_size" variable is always less than or to equal the "size"
variable.  It's easier to just check "conv_dst_size" instead of checking
both.

Fixes: a34fc329b1 ("platform/x86: hp-bioscfg: bioscfg")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/b4950310-e65f-412f-8d2b-90bb074a6572@moroto.mountain
Reviewed-by: Jorge Lopez <jorge.lopez2@hp.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

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Dan Carpenter 2023-07-18 10:05:34 +03:00 • committed by Hans de Goede

parent 93d99fd8e6

commit b3a8692d2c

1 changed files with 5 additions and 2 deletions

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drivers/platform/x86/hp/hp-bioscfg/bioscfg.c

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