5.4-stable review patch. If anyone has any objections, please let me know.
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From: Alexey Nepomnyashih sdl@nppct.ru
[ Upstream commit cca7b1cfd7b8a0eff2a3510c5e0f10efe8fa3758 ]
The expression `(conf->instr_type == 64) << iq_no` can overflow because `iq_no` may be as high as 64 (`CN23XX_MAX_RINGS_PER_PF`). Casting the operand to `u64` ensures correct 64-bit arithmetic.
Fixes: f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters") Signed-off-by: Alexey Nepomnyashih sdl@nppct.ru Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/cavium/liquidio/request_manager.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/cavium/liquidio/request_manager.c b/drivers/net/ethernet/cavium/liquidio/request_manager.c index 6dd65f9b347cb..b606cb1906644 100644 --- a/drivers/net/ethernet/cavium/liquidio/request_manager.c +++ b/drivers/net/ethernet/cavium/liquidio/request_manager.c @@ -139,7 +139,7 @@ int octeon_init_instr_queue(struct octeon_device *oct, oct->io_qmask.iq |= BIT_ULL(iq_no);
/* Set the 32B/64B mode for each input queue */ - oct->io_qmask.iq64B |= ((conf->instr_type == 64) << iq_no); + oct->io_qmask.iq64B |= ((u64)(conf->instr_type == 64) << iq_no); iq->iqcmd_64B = (conf->instr_type == 64);
oct->fn_list.setup_iq_regs(oct, iq_no);