-----Original Message-----
From: Intel-wired-lan <redacted> On Behalf Of Tony
Nguyen
Sent: Friday, June 5, 2026 10:02 PM
To: Loktionov, Aleksandr <redacted>; intel-wired-
lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Subject: Re: [Intel-wired-lan] [PATCH iwl-net] ice: reject out-of-range ptype in
ice_parser_profile_init



On 5/27/2026 12:18 AM, Aleksandr Loktionov wrote:

quoted

set_bit(rslt->ptype, prof->ptypes) operates on a DECLARE_BITMAP of
ICE_FLOW_PTYPE_MAX (1024) bits. Nothing prevents a malicious VF from
providing ptype >= 1024 through VIRTCHNL, resulting in a write past
the end of the bitmap and a kernel page fault.

Reproduced with a custom kernel module injecting a crafted
VIRTCHNL_OP_ADD_RSS_CFG on E810-C QSFP (8086:1592), FW 4.91

0x800214af

quoted

1.3909.0, ICE COMMS DDP 1.3.53.0, kernel 7.1.0-rc1.

crash_parser: ice_parser_profile_init @ ffffffffc0d61b60
crash_parser: setting ptype=0xffff (max valid=1023)
crash_parser: calling ice_parser_profile_init -- expect OOB crash!
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
Oops: Oops: 0002 [#1] SMP NOPTI
CPU: 56 UID: 0 PID: 165011 Comm: insmod Kdump: loaded Tainted: G S U
OE 7.1.0-rc1 #1 Hardware name: Intel Corporation S2600BPB/S2600BPB
RIP: 0010:ice_parser_profile_init+0x2d/0x1d0 [ice] Call Trace:
  <TASK>
  ? __pfx_ice_parser_profile_init+0x10/0x10 [ice]
  crash_init+0x127/0xff0 [crash_parser]
  do_one_initcall+0x45/0x310
  do_init_module+0x64/0x270
  init_module_from_file+0xcc/0xf0
  idempotent_init_module+0x17b/0x280
  __x64_sys_finit_module+0x6e/0xe0

Bail out early with -EINVAL when ptype is out of range.

Fixes: e312b3a1e209 ("ice: add API for parser profile initialization")
Cc: stable@vger.kernel.org
Signed-off-by: Aleksandr Loktionov <redacted>
---
  drivers/net/ethernet/intel/ice/ice_parser.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_parser.c

b/drivers/net/ethernet/intel/ice/ice_parser.c
index f8e6963..3ede4c1 100644

--- a/drivers/net/ethernet/intel/ice/ice_parser.c
+++ b/drivers/net/ethernet/intel/ice/ice_parser.c

@@ -2368,6 +2368,9 @@ int ice_parser_profile_init(struct ice_parser_result

Tested-by: Rafal Romanowski <redacted>