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libkmod: reset was_space on second pass

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The softdep config parser uses a 2-pass approach to use a single
allocation for all the softdep struct. However "was_space" variable
isn't reset between them. This can lead to a buffer overflow.

Reported-by: Jorge Lucangeli Obes <jorgelo@google.com>
Link: https://lore.kernel.org/linux-modules/CAKYuF5QhGCPCazHQjN-=kFc5kHs7Ok8WqmmGLo31CiOEN8TYdA@mail.gmail.com
This commit is contained in:
Lucas De Marchi 2020-01-20 16:15:38 -03:00
parent 81dbf2bee6
commit f975f6bfcc
1 changed files with 1 additions and 0 deletions
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libkmod/libkmod-config.c
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@ -335,6 +335,7 @@ static int kmod_config_add_softdep(struct kmod_config *config,
n_pre = 0;
n_post = 0;
mode = S_NONE;
was_space = false;
for (p = s = line; ; s++) {
size_t plen;