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linux_dsm_epyc7002/tools/testing/selftests/tc-testing/tc-tests/actions/nat.json
Davide Caratti 1e45d043a8 net/sched: act_nat: validate the control action inside init() 
the following script:

 # tc qdisc add dev crash0 clsact
 # tc filter add dev crash0 egress matchall \
 > action nat ingress 1.18.1.1 1.18.2.2 pass index 90
 # tc actions replace action nat \
 > ingress 1.18.1.1 1.18.2.2 goto chain 42 index 90 cookie c1a0c1a0
 # tc actions show action nat

had the following output:

 Error: Failed to init TC action chain.
 We have an error talking to the kernel
 total acts 1

         action order 0:  nat ingress 1.18.1.1/32 1.18.2.2 goto chain 42
          index 90 ref 2 bind 1
         cookie c1a0c1a0

Then, the first packet transmitted by crash0 made the kernel crash:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 #PF error: [normal kernel read fault]
 PGD 800000002d180067 P4D 800000002d180067 PUD 7cb8b067 PMD 0
 Oops: 0000 [#1] SMP PTI
 CPU: 3 PID: 164 Comm: kworker/3:1 Not tainted 5.0.0-rc4.gotochain_crash+ #533
 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
 Workqueue: ipv6_addrconf addrconf_dad_work
 RIP: 0010:tcf_action_exec+0xb8/0x100
 Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
 RSP: 0018:ffffae4500e2fad0 EFLAGS: 00010246
 RAX: 000000002000002a RBX: ffff9fa52e28c800 RCX: 0000000001011201
 RDX: 0000000000000000 RSI: 0000000000000056 RDI: ffff9fa52ca12800
 RBP: ffffae4500e2fb70 R08: 0000000000000022 R09: 000000000000000e
 R10: 00000000ffffffff R11: 0000000001011201 R12: ffff9fa52cbc9c00
 R13: ffff9fa52cbc9c08 R14: 0000000000000001 R15: ffff9fa52ca12780
 FS:  0000000000000000(0000) GS:ffff9fa57db80000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 0000000073f8c004 CR4: 00000000001606e0
 Call Trace:
  tcf_classify+0x58/0x120
  __dev_queue_xmit+0x40a/0x890
  ? ndisc_next_option+0x50/0x50
  ? ___neigh_create+0x4d5/0x680
  ? ip6_finish_output2+0x1b5/0x590
  ip6_finish_output2+0x1b5/0x590
  ? ip6_output+0x68/0x110
  ip6_output+0x68/0x110
  ? nf_hook.constprop.28+0x79/0xc0
  ndisc_send_skb+0x248/0x2e0
  ndisc_send_ns+0xf8/0x200
  ? addrconf_dad_work+0x389/0x4b0
  addrconf_dad_work+0x389/0x4b0
  ? __switch_to_asm+0x34/0x70
  ? process_one_work+0x195/0x380
  ? addrconf_dad_completed+0x370/0x370
  process_one_work+0x195/0x380
  worker_thread+0x30/0x390
  ? process_one_work+0x380/0x380
  kthread+0x113/0x130
  ? kthread_park+0x90/0x90
  ret_from_fork+0x35/0x40
 Modules linked in: act_nat veth ip6table_filter ip6_tables iptable_filter binfmt_misc ext4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel mbcache jbd2 snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_seq snd_seq_device snd_pcm aesni_intel crypto_simd cryptd glue_helper snd_timer snd joydev virtio_balloon pcspkr soundcore i2c_piix4 nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs qxl ata_generic pata_acpi drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm virtio_net virtio_blk net_failover failover virtio_console drm crc32c_intel floppy ata_piix libata virtio_pci virtio_ring virtio serio_raw dm_mirror dm_region_hash dm_log dm_mod
 CR2: 0000000000000000

Validating the control action within tcf_nat_init() proved to fix the
above issue. A TDC selftest is added to verify the correct behavior.

Fixes: db50514f9a ("net: sched: add termination action to allow goto chain")
Fixes: 97763dc0f4 ("net_sched: reject unknown tcfa_action values")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-21 13:26:41 -07:00

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[
{
"id": "7565",
"name": "Add nat action on ingress with default control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 192.168.1.1 200.200.200.1",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat ingress 192.168.1.1/32 200.200.200.1 pass",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "fd79",
"name": "Add nat action on ingress with pipe control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.1.1.1 2.2.2.1 pipe index 77",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 77",
"matchPattern": "action order [0-9]+: nat ingress 1.1.1.1/32 2.2.2.1 pipe.*index 77 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "eab9",
"name": "Add nat action on ingress with continue control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 192.168.10.10 192.168.20.20 continue index 1000",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 1000",
"matchPattern": "action order [0-9]+: nat ingress 192.168.10.10/32 192.168.20.20 continue.*index 1000 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "c53a",
"name": "Add nat action on ingress with reclassify control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 192.168.10.10 192.168.20.20 reclassify index 1000",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 1000",
"matchPattern": "action order [0-9]+: nat ingress 192.168.10.10/32 192.168.20.20 reclassify.*index 1000 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "76c9",
"name": "Add nat action on ingress with jump control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 12.18.10.10 12.18.20.20 jump 10 index 22",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 22",
"matchPattern": "action order [0-9]+: nat ingress 12.18.10.10/32 12.18.20.20 jump 10.*index 22 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "24c6",
"name": "Add nat action on ingress with drop control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.18.1.1 1.18.2.2 drop index 722",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 722",
"matchPattern": "action order [0-9]+: nat ingress 1.18.1.1/32 1.18.2.2 drop.*index 722 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "2120",
"name": "Add nat action on ingress with maximum index value",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.18.1.1 1.18.2.2 index 4294967295",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 4294967295",
"matchPattern": "action order [0-9]+: nat ingress 1.18.1.1/32 1.18.2.2 pass.*index 4294967295 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "3e9d",
"name": "Add nat action on ingress with invalid index value",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.18.1.1 1.18.2.2 index 4294967295555",
"expExitCode": "255",
"verifyCmd": "$TC actions get action nat index 4294967295555",
"matchPattern": "action order [0-9]+: nat ingress 1.18.1.1/32 1.18.2.2 pass.*index 4294967295555 ref",
"matchCount": "0",
"teardown": [
[
"$TC actions flush action nat",
0,
1,
255
]
]
},
{
"id": "f6c9",
"name": "Add nat action on ingress with invalid IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.1.1.1 1.1888.2.2 index 7",
"expExitCode": "255",
"verifyCmd": "$TC actions get action nat index 7",
"matchPattern": "action order [0-9]+: nat ingress 1.1.1.1/32 1.1888.2.2 pass.*index 7 ref",
"matchCount": "0",
"teardown": [
[
"$TC actions flush action nat",
0,
1,
255
]
]
},
{
"id": "be25",
"name": "Add nat action on ingress with invalid argument",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 1.1.1.1 1.18.2.2 another_arg index 12",
"expExitCode": "255",
"verifyCmd": "$TC actions get action nat index 12",
"matchPattern": "action order [0-9]+: nat ingress 1.1.1.1/32 1.18.2.2 pass.*another_arg.*index 12 ref",
"matchCount": "0",
"teardown": [
[
"$TC actions flush action nat",
0,
1,
255
]
]
},
{
"id": "a7bd",
"name": "Add nat action on ingress with DEFAULT IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress default 10.10.10.1 index 12",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 12",
"matchPattern": "action order [0-9]+: nat ingress 0.0.0.0/32 10.10.10.1 pass.*index 12 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "ee1e",
"name": "Add nat action on ingress with ANY IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress any 10.10.10.1 index 12",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 12",
"matchPattern": "action order [0-9]+: nat ingress 0.0.0.0/32 10.10.10.1 pass.*index 12 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "1de8",
"name": "Add nat action on ingress with ALL IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress all 10.10.10.1 index 12",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 12",
"matchPattern": "action order [0-9]+: nat ingress 0.0.0.0/32 10.10.10.1 pass.*index 12 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "8dba",
"name": "Add nat action on egress with default control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 pass",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "19a7",
"name": "Add nat action on egress with pipe control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1 pipe",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 pipe",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "f1d9",
"name": "Add nat action on egress with continue control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1 continue",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 continue",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "6d4a",
"name": "Add nat action on egress with reclassify control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1 reclassify",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 reclassify",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "b313",
"name": "Add nat action on egress with jump control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1 jump 777",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 jump 777",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "d9fc",
"name": "Add nat action on egress with drop control action",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress 10.10.10.1 20.20.20.1 drop",
"expExitCode": "0",
"verifyCmd": "$TC actions ls action nat",
"matchPattern": "action order [0-9]+: nat egress 10.10.10.1/32 20.20.20.1 drop",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "a895",
"name": "Add nat action on egress with DEFAULT IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress default 20.20.20.1 pipe index 10",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 10",
"matchPattern": "action order [0-9]+: nat egress 0.0.0.0/32 20.20.20.1 pipe.*index 10 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "2572",
"name": "Add nat action on egress with ANY IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress any 20.20.20.1 pipe index 10",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 10",
"matchPattern": "action order [0-9]+: nat egress 0.0.0.0/32 20.20.20.1 pipe.*index 10 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "37f3",
"name": "Add nat action on egress with ALL IP address",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress all 20.20.20.1 pipe index 10",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 10",
"matchPattern": "action order [0-9]+: nat egress 0.0.0.0/32 20.20.20.1 pipe.*index 10 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "6054",
"name": "Add nat action on egress with cookie",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat egress all 20.20.20.1 pipe index 10 cookie aa1bc2d3eeff112233445566778800a1",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 10",
"matchPattern": "action order [0-9]+: nat egress 0.0.0.0/32 20.20.20.1 pipe.*index 10 ref.*cookie aa1bc2d3eeff112233445566778800a1",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "79d6",
"name": "Add nat action on ingress with cookie",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
]
],
"cmdUnderTest": "$TC actions add action nat ingress 192.168.1.1 10.10.10.1 reclassify index 1 cookie 112233445566778899aabbccddeeff11",
"expExitCode": "0",
"verifyCmd": "$TC actions get action nat index 1",
"matchPattern": "action order [0-9]+: nat ingress 192.168.1.1/32 10.10.10.1 reclassify.*index 1 ref.*cookie 112233445566778899aabbccddeeff11",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
},
{
"id": "4b12",
"name": "Replace nat action with invalid goto chain control",
"category": [
"actions",
"nat"
],
"setup": [
[
"$TC actions flush action nat",
0,
1,
255
],
"$TC actions add action nat ingress 1.18.1.1 1.18.2.2 drop index 90"
],
"cmdUnderTest": "$TC actions replace action nat ingress 1.18.1.1 1.18.2.2 goto chain 42 index 90 cookie c1a0c1a0",
"expExitCode": "255",
"verifyCmd": "$TC actions get action nat index 90",
"matchPattern": "action order [0-9]+: nat ingress 1.18.1.1/32 1.18.2.2 drop.*index 90 ref",
"matchCount": "1",
"teardown": [
"$TC actions flush action nat"
]
}
]
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