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smartcard: Do not crash if reader_id is invalid

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Avoid client to trigger crash. The value of smartcard_readers_get
is checked for NULL so returning it it's not an issue.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Victor Toso <victortoso@redhat.com>
This commit is contained in:
Frediano Ziglio 2019-10-08 12:43:53 +01:00
parent 18877d1af8
commit 57d02c2d17
1 changed files with 3 additions and 1 deletions
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4
server/smartcard.c
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@ -222,7 +222,9 @@ static int smartcard_char_device_add_to_readers(RedsState *reds, SpiceCharDevice
SpiceCharDeviceInstance *smartcard_readers_get(uint32_t reader_id)
{
spice_assert(reader_id < g_smartcard_readers.num);
if (reader_id >= g_smartcard_readers.num) {
return NULL;
}
return g_smartcard_readers.sin[reader_id];
}