AuxXxilium/linux_dsm_epyc7002
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e8c87c643e
linux_dsm_epyc7002/tools/testing/selftests
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Davide Caratti e8c87c643e net/sched: act_sample: validate the control action inside init() 
the following script:

 # tc qdisc add dev crash0 clsact
 # tc filter add dev crash0 egress matchall \
 > action sample rate 1024 group 4 pass index 90
 # tc actions replace action sample \
 > rate 1024 group 4 goto chain 42 index 90 cookie c1a0c1a0
 # tc actions show action sample

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: sample rate 1/1024 group 4 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 8000000079966067 P4D 8000000079966067 PUD 7987b067 PMD 0
 Oops: 0000 [#1] SMP PTI
 CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.0.0-rc4.gotochain_crash+ #536
 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:ffffbee60033fad0 EFLAGS: 00010246
 RAX: 000000002000002a RBX: ffff99d7ae6e3b00 RCX: 00000000e555df9b
 RDX: 0000000000000000 RSI: 00000000b0352718 RDI: ffff99d7fda1fcf0
 RBP: ffffbee60033fb70 R08: 0000000070731ab1 R09: 0000000000000400
 R10: 0000000000000000 R11: ffff99d7ac733838 R12: ffff99d7f3c2be00
 R13: ffff99d7f3c2be08 R14: 0000000000000001 R15: ffff99d7f3c2b600
 FS:  0000000000000000(0000) GS:ffff99d7fda00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 00000000797de006 CR4: 00000000001606f0
 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_sample psample 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 aesni_intel crypto_simd snd_pcm cryptd glue_helper snd_timer joydev snd pcspkr virtio_balloon i2c_piix4 soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs ata_generic pata_acpi qxl drm_kms_helper syscopyarea sysfillrect virtio_net sysimgblt fb_sys_fops net_failover ttm failover virtio_blk virtio_console drm ata_piix serio_raw crc32c_intel libata virtio_pci virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod
 CR2: 0000000000000000

Validating the control action within tcf_sample_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
..
android selftests: Fix test errors related to lib.mk khdr target 2018-12-17 09:17:55 -07:00
bpf selftests/bpf: add fwd enum resolution test for btf_dedup 2019-03-14 13:53:18 -07:00
breakpoints selftests: breakpoints: return Kselftest Skip code for skipped tests 2018-05-30 15:21:52 -06:00
capabilities
cgroup Add tests for memory.oom.group 2018-09-07 16:36:01 -06:00
cpu-hotplug selftests: cpu-hotplug: fix case where CPUs offline > CPUs present 2019-01-25 14:57:45 -07:00
cpufreq selftests: cpufreq: return Kselftest Skip code for skipped tests 2018-05-30 15:21:52 -06:00
drivers selftests: mlxsw: spectrum-2: Add massive delta rehash test 2019-02-24 20:25:29 -08:00
efivarfs selftests/efivarfs: add required kernel configs 2018-09-05 10:58:07 -06:00
exec selftests: exec: return Kselftest Skip code for skipped tests 2018-05-30 15:21:52 -06:00
filesystems selftests: add binderfs selftests 2019-01-30 15:19:56 +01:00
firmware selftests: firmware: fix verify_reqs() return value 2019-02-08 13:00:43 +01:00
ftrace The biggest change for this release is in the histogram code. 2019-03-11 17:01:32 -07:00
futex selftests: Fix test errors related to lib.mk khdr target 2018-12-17 09:17:55 -07:00
gpio selftests: gpio-mockup-chardev: Check asprintf() for error 2019-01-16 15:02:57 -07:00
ia64
ima selftests/ima: kexec_load syscall test 2018-12-11 07:19:47 -05:00
intel_pstate selftests: intel_pstate: notification about privilege required to run intel_pstate testing script 2018-05-30 21:31:31 -06:00
ipc selftests: ipc: return Kselftest Skip code for skipped tests 2018-05-30 15:21:53 -06:00
ir media updates for v5.1-rc1 2019-03-09 14:45:54 -08:00
kcmp
kmod selftests: kmod: return Kselftest Skip code for skipped tests 2018-05-30 15:21:53 -06:00
kvm KVM: selftests: check returned evmcs version range 2019-01-25 19:11:38 +01:00
lib selftests: lib: fix prime_numbers module search and skip logic 2018-05-30 21:32:55 -06:00
livepatch livepatch/selftests: use "$@" to preserve argument list 2019-02-12 10:58:47 +01:00
locking selftests: locking: return Kselftest Skip code for skipped tests 2018-05-30 15:29:06 -06:00
media_tests selftests: media_tests: return Kselftest Skip code for skipped tests 2018-05-30 15:29:06 -06:00
membarrier selftests: membarrier: return Kselftest Skip code for skipped tests 2018-05-30 15:29:06 -06:00
memfd selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal 2019-03-05 21:07:19 -08:00
memory-hotplug selftests: memory-hotplug: add required configs 2018-09-05 10:58:31 -06:00
mount selftests: mount: remove no longer needed config option 2018-08-09 11:26:07 -06:00
mqueue selftests: mqueue: return Kselftest Skip code for skipped tests 2018-05-30 15:29:06 -06:00
net selftest/net: Remove duplicate header 2019-03-04 11:35:51 -08:00
netfilter selftests: netfilter: add simple masq/redirect test cases 2019-02-04 14:21:27 +01:00
networking/timestamping Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-02-15 12:38:38 -08:00
nsfs
ntb
powerpc selftests/powerpc: Remove duplicate header 2019-02-26 12:32:06 +11:00
prctl
proc tools/testing/selftests/proc/proc-pid-vm.c: test with vsyscall in mind 2019-03-14 14:36:20 -07:00
pstore selftests: pstore: return Kselftest Skip code for skipped tests 2018-06-18 09:11:09 -06:00
ptp
ptrace
rcutorture tools headers: Move the nolibc header from rcutorture to tools/include/nolibc/ 2019-01-25 15:37:13 -08:00
rseq rseq/selftests: fix parametrized test with -fpie 2018-09-27 12:59:19 -06:00
rtc selftests: rtc: rtctest: add alarm test on minute boundary 2019-01-14 18:49:14 -07:00
safesetid LSM: SafeSetID: add selftest 2019-02-12 10:58:51 -08:00
seccomp selftests/seccomp: Actually sleep for 1/10th second 2019-02-13 08:52:42 -07:00
sigaltstack
size
sparc64 selftests: sparc64: Add missing SPDX License Identifiers 2018-06-18 09:29:20 -06:00
splice
static_keys selftests: static_keys: return Kselftest Skip code for skipped tests 2018-06-18 09:11:09 -06:00
sync selftests: sync: add config fragment for testing sync framework 2018-06-18 09:11:10 -06:00
sysctl tools/testing/selftests/sysctl/sysctl.sh: add tests for >32-bit values written to 32-bit integers 2019-03-12 10:04:00 -07:00
tc-testing net/sched: act_sample: validate the control action inside init() 2019-03-21 13:26:41 -07:00
timers selftests: timers: use LDLIBS instead of LDFLAGS 2019-01-28 08:02:12 -07:00
tmpfs tmpfs: test link accounting with O_TMPFILE 2019-03-05 21:07:20 -08:00
tpm2 selftests: add TPM 2.0 tests 2019-02-08 23:13:02 +02:00
uevent selftests: uevent filtering 2018-05-23 15:24:22 -04:00
user selftests: user: return Kselftest Skip code for skipped tests 2018-06-18 09:11:09 -06:00
vDSO selftests: vDSO - fix to return KSFT_SKIP when test couldn't be run 2018-07-11 10:14:26 -06:00
vm tools: mark 'test_vmalloc.sh' executable 2019-03-11 10:10:29 -07:00
watchdog selftests: watchdog: fix spelling mistake "experies" -> "expires" 2018-12-13 13:03:19 -07:00
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-01-27 12:02:00 -08:00
zram selftests: zram: return Kselftest Skip code for skipped tests 2018-06-18 09:11:09 -06:00
.gitignore
gen_kselftest_tar.sh
kselftest_harness.h selftests/harness: Update named initializer syntax 2019-02-13 08:52:35 -07:00
kselftest_install.sh
kselftest.h selftest: include stdio.h in kselftest.h 2019-02-13 08:34:47 -07:00
lib.mk selftests: Fix test errors related to lib.mk khdr target 2018-12-17 09:17:55 -07:00
Makefile Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-03-10 17:37:29 -07:00