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Merge "msm: adsprpc: Validate the CID"

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qctecmdr 2022-08-03 11:48:33 -07:00 • committed by Gerrit - the friendly Code Review server
commit b2e71fbdb8
1 changed files with 8 additions and 1 deletions
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9
drivers/char/adsprpc.c
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@ -118,6 +118,9 @@
#define GET_TABLE_IDX_FROM_CTXID(ctxid) \
((ctxid & FASTRPC_CTX_TABLE_IDX_MASK) >> FASTRPC_CTX_TABLE_IDX_POS)
#define VALID_FASTRPC_CID(cid) \
(cid >= ADSP_DOMAIN_ID && cid < NUM_CHANNELS)
/* Reserve few entries in context table for critical kernel and static RPC
* calls to avoid user invocations from exhausting all entries.
*/
@ -2066,7 +2069,11 @@ static int context_alloc(struct fastrpc_file *fl, uint32_t kernel,
if (err)
goto bail;
}
VERIFY(err, VALID_FASTRPC_CID(cid));
if (err) {
err = -ECHRNG;
goto bail;
}
chan = &me->channel[cid];
spin_lock_irqsave(&chan->ctxlock, irq_flags);