diff options
| author | Seiji Nishikawa <snishika@redhat.com> | 2023-04-17 15:21:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-04-19 11:03:05 +0300 |
| commit | 6f4833383e8514ea796d094e05c24889b8997fde (patch) | |
| tree | 68c7ff258c8580de9ff91fa8f6d30c4398b5110b /drivers | |
| parent | c484fcc058bada604d7e4e5228d4affb646ddbc2 (diff) | |
| download | linux-6f4833383e8514ea796d094e05c24889b8997fde.tar.xz | |
net: vmxnet3: Fix NULL pointer dereference in vmxnet3_rq_rx_complete()
When vmxnet3_rq_create() fails to allocate rq->data_ring.base due to page
allocation failure, subsequent call to vmxnet3_rq_rx_complete() can result in
NULL pointer dereference.
To fix this bug, check not only that rxDataRingUsed is true but also that
adapter->rxdataring_enabled is true before calling memcpy() in
vmxnet3_rq_rx_complete().
[1728352.477993] ethtool: page allocation failure: order:9, mode:0x6000c0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0
...
[1728352.478009] Call Trace:
[1728352.478028] dump_stack+0x41/0x60
[1728352.478035] warn_alloc.cold.120+0x7b/0x11b
[1728352.478038] ? _cond_resched+0x15/0x30
[1728352.478042] ? __alloc_pages_direct_compact+0x15f/0x170
[1728352.478043] __alloc_pages_slowpath+0xcd3/0xd10
[1728352.478047] __alloc_pages_nodemask+0x2e2/0x320
[1728352.478049] __dma_direct_alloc_pages.constprop.25+0x8a/0x120
[1728352.478053] dma_direct_alloc+0x5a/0x2a0
[1728352.478056] vmxnet3_rq_create.part.57+0x17c/0x1f0 [vmxnet3]
...
[1728352.478188] vmxnet3 0000:0b:00.0 ens192: rx data ring will be disabled
...
[1728352.515347] BUG: unable to handle kernel NULL pointer dereference at 0000000000000034
...
[1728352.515440] RIP: 0010:memcpy_orig+0x54/0x130
...
[1728352.515655] Call Trace:
[1728352.515665] <IRQ>
[1728352.515672] vmxnet3_rq_rx_complete+0x419/0xef0 [vmxnet3]
[1728352.515690] vmxnet3_poll_rx_only+0x31/0xa0 [vmxnet3]
...
Signed-off-by: Seiji Nishikawa <snishika@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/vmxnet3/vmxnet3_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index da488cbb0542..f2b76ee866a4 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -1504,7 +1504,7 @@ vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, goto rcd_done; } - if (rxDataRingUsed) { + if (rxDataRingUsed && adapter->rxdataring_enabled) { size_t sz; BUG_ON(rcd->len > rq->data_ring.desc_size); |