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mkregtable: Fix sscanf handling

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If you feed the tool a suitable bogus register map you can break it
in arbitary (code executing) ways. While this isn't a particularly
exciting or probable attack vector we still ought to fix it.

One of a set of sscanf issues reported by Jackie Chang

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Alan 2013-12-17 15:05:39 +00:00 committed by Jiri Kosina
parent bfb18d824c
commit 6b6419005e
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/radeon/mkregtable.c
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@ -655,7 +655,7 @@ static int parser_auth(struct table *t, const char *filename)
/* first line will contain the last register
* and gpu name */
sscanf(buf, "%s %s", gpu_name, last_reg_s);
sscanf(buf, "%9s %9s", gpu_name, last_reg_s);
t->gpu_prefix = gpu_name;
last_reg = strtol(last_reg_s, NULL, 16);