Re: [PATCH] net: ethernet: broadcom: Fix uninitialized lockal variable
From: Pavan Chebbi <pavan.chebbi@broadcom.com>
Date: 2024-10-31 17:54:15
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On Thu, Oct 31, 2024 at 11:02 PM George Rurikov [off-list ref] wrote:
I can't find any reason why it won't happen. In SERDES_TG3_SGMII_MODE, when current_link_up == true and current_duplex == DUPLEX_FULL, program execution will be transferred using the goto fiber_setup_done, where the uninitialized remote_adv variable is passed as the second parameter to the tg3_setup_flow_control function.
You mean the third parameter to the function. BTW, does this argument not hold good for local_adv also?
quoted hunk ↗ jump to hunk
Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 85730a631f0c ("tg3: Add SGMII phy support for 5719/5718 serdes") Cc: stable@vger.kernel.org Signed-off-by: George Rurikov <redacted> --- drivers/net/ethernet/broadcom/tg3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 378815917741..b1c60851c841 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c@@ -5802,7 +5802,8 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, bool force_reset) u32 current_speed = SPEED_UNKNOWN; u8 current_duplex = DUPLEX_UNKNOWN; bool current_link_up = false; - u32 local_adv, remote_adv, sgsr; + u32 local_adv, sgsr; + u32 remote_adv = 0; if ((tg3_asic_rev(tp) == ASIC_REV_5719 || tg3_asic_rev(tp) == ASIC_REV_5720) && --2.34.1
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