5.15-stable review patch. If anyone has any objections, please let me know.
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From: Ajay Singh ajay.kathat@microchip.com
commit 05ac1a198a63ad66bf5ae8b7321407c102d40ef3 upstream.
Enabling KASAN and running some iperf tests raises some memory issues with vmm_table:
BUG: KASAN: slab-out-of-bounds in wilc_wlan_handle_txq+0x6ac/0xdb4 Write of size 4 at addr c3a61540 by task wlan0-tx/95
KASAN detects that we are writing data beyond range allocated to vmm_table. There is indeed a mismatch between the size passed to allocator in wilc_wlan_init, and the range of possible indexes used later: allocation size is missing a multiplication by sizeof(u32)
Fixes: 40b717bfcefa ("wifi: wilc1000: fix DMA on stack objects") Cc: stable@vger.kernel.org Signed-off-by: Ajay Singh ajay.kathat@microchip.com Signed-off-by: Alexis Lothoré alexis.lothore@bootlin.com Reviewed-by: Michael Walle mwalle@kernel.org Reviewed-by: Jeff Johnson quic_jjohnson@quicinc.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://lore.kernel.org/r/20231017-wilc1000_tx_oops-v3-1-b2155f1f7bee@bootli... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/microchip/wilc1000/wlan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c +++ b/drivers/net/wireless/microchip/wilc1000/wlan.c @@ -1458,7 +1458,7 @@ int wilc_wlan_init(struct net_device *de }
if (!wilc->vmm_table) - wilc->vmm_table = kzalloc(WILC_VMM_TBL_SIZE, GFP_KERNEL); + wilc->vmm_table = kcalloc(WILC_VMM_TBL_SIZE, sizeof(u32), GFP_KERNEL);
if (!wilc->vmm_table) { ret = -ENOBUFS;