6.12-stable review patch. If anyone has any objections, please let me know.
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From: Zijun Hu quic_zijuhu@quicinc.com
commit fec3edc47d5cfc2dd296a5141df887bf567944db upstream.
On a malformed interrupt-map property which is shorter than expected by 1 cell, we may read bogus data past the end of the property instead of returning an error in of_irq_parse_imap_parent().
Decrement the remaining length when skipping over the interrupt parent phandle cell.
Fixes: 935df1bd40d4 ("of/irq: Factor out parsing of interrupt-map parent phandle+args from of_irq_parse_raw()") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu quic_zijuhu@quicinc.com Link: https://lore.kernel.org/r/20241209-of_irq_fix-v1-1-782f1419c8a1@quicinc.com [rh: reword commit msg] Signed-off-by: Rob Herring (Arm) robh@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/of/irq.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -111,6 +111,7 @@ const __be32 *of_irq_parse_imap_parent(c else np = of_find_node_by_phandle(be32_to_cpup(imap)); imap++; + len--;
/* Check if not found */ if (!np) {