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| author | Cezar Bulinaru <cbulinaru@gmail.com> | 2022-10-13 22:45:03 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-10-15 11:09:53 +0100 |
| commit | 017e42540639a46fdf7c7f5ee647e0b7806c9013 (patch) | |
| tree | 5490a4634a84a2157efba2a8b28707c09a9d81ff /drivers/net/Kconfig | |
| parent | d8bde3bf7f82dac5fc68a62c2816793a12cafa2a (diff) | |
| download | linux-017e42540639a46fdf7c7f5ee647e0b7806c9013.tar.bz2 | |
net: hv_netvsc: Fix a warning triggered by memcpy in rndis_filter
memcpy: detected field-spanning write (size 168) of single field "(void *)&request->response_msg + (sizeof(struct rndis_message) - sizeof(union rndis_message_container)) + sizeof(*req_id)" at drivers/net/hyperv/rndis_filter.c:338 (size 40)
RSP: 0018:ffffc90000144de0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881766b4000 RCX: 0000000000000000
RDX: 0000000000000102 RSI: 0000000000009ffb RDI: 00000000ffffffff
RBP: ffffc90000144e38 R08: 0000000000000000 R09: 00000000ffffdfff
R10: ffffc90000144c48 R11: ffffffff82f56ac8 R12: ffff8881766b403c
R13: 00000000000000a8 R14: ffff888100b75000 R15: ffff888179301d00
FS: 0000000000000000(0000) GS:ffff8884d6280000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f8b024c418 CR3: 0000000176548001 CR4: 00000000003706e0
Call Trace:
<IRQ>
? _raw_spin_unlock_irqrestore+0x27/0x50
netvsc_poll+0x556/0x940 [hv_netvsc]
__napi_poll+0x2e/0x170
net_rx_action+0x299/0x2f0
__do_softirq+0xed/0x2ef
__irq_exit_rcu+0x9f/0x110
irq_exit_rcu+0xe/0x20
sysvec_hyperv_callback+0xb0/0xd0
</IRQ>
<TASK>
asm_sysvec_hyperv_callback+0x1b/0x20
RIP: 0010:native_safe_halt+0xb/0x10
Fixes: A warning triggered when the response message len exceeds
the size of rndis_message. Inside the rndis_request structure
these fields are however followed by a RNDIS_EXT_LEN padding
so it is safe to use unsafe_memcpy.
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Cezar Bulinaru <cbulinaru@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/Kconfig')
0 files changed, 0 insertions, 0 deletions