Bug 1222003 (CVE-2021-47175)

Summary:	VUL-0: CVE-2021-47175: kernel: net/sched: fq_pie: fix OOB access in the traffic path
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	gabriele.sonnu, vasant.karasulli
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/398824/
Whiteboard:	CVSSv3.1:SUSE:CVE-2021-47175:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-03-26 13:48:55 UTC

In the Linux kernel, the following vulnerability has been resolved:

net/sched: fq_pie: fix OOB access in the traffic path

the following script:

  # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2
  # tc qdisc add dev eth0 clsact
  # tc filter add dev eth0 egress matchall action skbedit priority 0x10002
  # ping 192.0.2.2 -I eth0 -c2 -w1 -q

produces the following splat:

 BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]
 Read of size 4 at addr ffff888171306924 by task ping/942

 CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441
 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014
 Call Trace:
  dump_stack+0x92/0xc1
  print_address_description.constprop.7+0x1a/0x150
  kasan_report.cold.13+0x7f/0x111
  fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]
  __dev_queue_xmit+0x1034/0x2b10
  ip_finish_output2+0xc62/0x2120
  __ip_finish_output+0x553/0xea0
  ip_output+0x1ca/0x4d0
  ip_send_skb+0x37/0xa0
  raw_sendmsg+0x1c4b/0x2d00
  sock_sendmsg+0xdb/0x110
  __sys_sendto+0x1d7/0x2b0
  __x64_sys_sendto+0xdd/0x1b0
  do_syscall_64+0x3c/0x80
  entry_SYSCALL_64_after_hwframe+0x44/0xae
 RIP: 0033:0x7fe69735c3eb
 Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89
 RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
 RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb
 RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003
 RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010
 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260
 R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0

 Allocated by task 917:
  kasan_save_stack+0x19/0x40
  __kasan_kmalloc+0x7f/0xa0
  __kmalloc_node+0x139/0x280
  fq_pie_init+0x555/0x8e8 [sch_fq_pie]
  qdisc_create+0x407/0x11b0
  tc_modify_qdisc+0x3c2/0x17e0
  rtnetlink_rcv_msg+0x346/0x8e0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x439/0x630
  netlink_sendmsg+0x719/0xbf0
  sock_sendmsg+0xe2/0x110
  ____sys_sendmsg+0x5ba/0x890
  ___sys_sendmsg+0xe9/0x160
  __sys_sendmsg+0xd3/0x170
  do_syscall_64+0x3c/0x80
  entry_SYSCALL_64_after_hwframe+0x44/0xae

 The buggy address belongs to the object at ffff888171306800
  which belongs to the cache kmalloc-256 of size 256
 The buggy address is located 36 bytes to the right of
  256-byte region [ffff888171306800, ffff888171306900)
 The buggy address belongs to the page:
 page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306
 head:00000000bcfb624e order:1 compound_mapcount:0
 flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)
 raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40
 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
 page dumped because: kasan: bad access detected

 Memory state around the buggy address:
  ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 >ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                ^
  ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
  ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb

fix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a
valid flow: it's an address beyond the allocated memory.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47175
https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c
https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680
https://www.cve.org/CVERecord?id=CVE-2021-47175
https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce
https://bugzilla.redhat.com/show_bug.cgi?id=2271465

Comment 1 Gabriele Sonnu 2024-03-26 15:13:41 UTC

Offending commit (ec97ecf1ebe4) found in:
 - ALP-current
 - cve/linux-5.14-LTSS
 - SLE15-SP3-LTSS
 - SLE15-SP4-LTSS
 - SLE15-SP5
 - SLE15-SP6
 - stable

Fixing commit (e70f7a11876a) found in:
 - ALP-current
 - cve/linux-5.14-LTSS
 - SLE15-SP3-LTSS
 - SLE15-SP4-LTSS
 - SLE15-SP5
 - SLE15-SP6
 - stable

All branches fixed. @kernel-team, please add the CVE reference.

Comment 5 Maintenance Automation 2024-04-29 16:31:00 UTC

SUSE-SU-2024:1465-1: An update that solves 145 vulnerabilities, contains five features and has five security fixes can now be installed.

Category: security (important)
Bug References: 1192145, 1209657, 1218336, 1218447, 1218479, 1218562, 1219170, 1219264, 1220320, 1220340, 1220366, 1220400, 1220411, 1220413, 1220414, 1220425, 1220426, 1220429, 1220432, 1220442, 1220445, 1220465, 1220468, 1220475, 1220484, 1220486, 1220487, 1220516, 1220521, 1220528, 1220529, 1220532, 1220536, 1220554, 1220556, 1220557, 1220560, 1220561, 1220566, 1220575, 1220580, 1220583, 1220611, 1220615, 1220621, 1220625, 1220630, 1220631, 1220638, 1220639, 1220640, 1220662, 1220663, 1220669, 1220670, 1220677, 1220678, 1220685, 1220687, 1220688, 1220692, 1220697, 1220703, 1220706, 1220733, 1220734, 1220739, 1220743, 1220749, 1220751, 1220753, 1220758, 1220759, 1220764, 1220768, 1220769, 1220777, 1220779, 1220785, 1220790, 1220794, 1220824, 1220829, 1220836, 1220846, 1220850, 1220861, 1220871, 1220883, 1220946, 1220954, 1220969, 1220979, 1220982, 1220985, 1220987, 1221015, 1221044, 1221058, 1221061, 1221077, 1221088, 1221276, 1221293, 1221532, 1221534, 1221541, 1221548, 1221552, 1221575, 1221605, 1221606, 1221608, 1221830, 1221931, 1221932, 1221934, 1221935, 1221949, 1221952, 1221965, 1221966, 1221969, 1221973, 1221974, 1221978, 1221989, 1221990, 1221991, 1221992, 1221993, 1221994, 1221996, 1221997, 1221998, 1221999, 1222000, 1222001, 1222002, 1222003, 1222004, 1222117, 1222422, 1222585, 1222619, 1222660, 1222664, 1222669, 1222706, 1222878
CVE References: CVE-2020-36780, CVE-2020-36781, CVE-2020-36782, CVE-2020-36783, CVE-2021-46908, CVE-2021-46909, CVE-2021-46911, CVE-2021-46914, CVE-2021-46917, CVE-2021-46918, CVE-2021-46919, CVE-2021-46920, CVE-2021-46921, CVE-2021-46922, CVE-2021-46930, CVE-2021-46931, CVE-2021-46933, CVE-2021-46938, CVE-2021-46939, CVE-2021-46943, CVE-2021-46944, CVE-2021-46950, CVE-2021-46951, CVE-2021-46956, CVE-2021-46958, CVE-2021-46959, CVE-2021-46960, CVE-2021-46961, CVE-2021-46962, CVE-2021-46963, CVE-2021-46971, CVE-2021-46976, CVE-2021-46980, CVE-2021-46981, CVE-2021-46983, CVE-2021-46984, CVE-2021-46988, CVE-2021-46990, CVE-2021-46991, CVE-2021-46992, CVE-2021-46998, CVE-2021-47000, CVE-2021-47001, CVE-2021-47003, CVE-2021-47006, CVE-2021-47009, CVE-2021-47014, CVE-2021-47015, CVE-2021-47017, CVE-2021-47020, CVE-2021-47026, CVE-2021-47034, CVE-2021-47035, CVE-2021-47038, CVE-2021-47044, CVE-2021-47045, CVE-2021-47046, CVE-2021-47049, CVE-2021-47051, CVE-2021-47055, CVE-2021-47056, CVE-2021-47058, CVE-2021-47063, CVE-2021-47065, CVE-2021-47068, CVE-2021-47070, CVE-2021-47071, CVE-2021-47073, CVE-2021-47077, CVE-2021-47082, CVE-2021-47087, CVE-2021-47095, CVE-2021-47097, CVE-2021-47100, CVE-2021-47101, CVE-2021-47109, CVE-2021-47110, CVE-2021-47112, CVE-2021-47114, CVE-2021-47117, CVE-2021-47118, CVE-2021-47119, CVE-2021-47120, CVE-2021-47130, CVE-2021-47136, CVE-2021-47137, CVE-2021-47138, CVE-2021-47139, CVE-2021-47141, CVE-2021-47142, CVE-2021-47144, CVE-2021-47150, CVE-2021-47153, CVE-2021-47160, CVE-2021-47161, CVE-2021-47164, CVE-2021-47165, CVE-2021-47166, CVE-2021-47167, CVE-2021-47168, CVE-2021-47169, CVE-2021-47170, CVE-2021-47171, CVE-2021-47172, CVE-2021-47173, CVE-2021-47174, CVE-2021-47175, CVE-2021-47176, CVE-2021-47177, CVE-2021-47179, CVE-2021-47180, CVE-2021-47181, CVE-2021-47183, CVE-2021-47185, CVE-2021-47189, CVE-2021-47202, CVE-2022-48626, CVE-2023-0160, CVE-2023-52454, CVE-2023-52469, CVE-2023-52470, CVE-2023-52474, CVE-2023-52476, CVE-2023-52477, CVE-2023-52492, CVE-2023-52500, CVE-2023-52508, CVE-2023-52509, CVE-2023-52572, CVE-2023-52575, CVE-2023-52583, CVE-2023-52590, CVE-2023-52591, CVE-2023-52607, CVE-2023-52628, CVE-2023-6270, CVE-2023-6531, CVE-2023-7042, CVE-2023-7192, CVE-2024-22099, CVE-2024-26600, CVE-2024-26614, CVE-2024-26642, CVE-2024-26704, CVE-2024-26733
Jira References: PED-5759, SLE-13706, SLE-15131, SLE-15172, SLE-15176
Maintenance Incident: [SUSE:Maintenance:33363](https://smelt.suse.de/incident/33363/)
Sources used:
SUSE Linux Enterprise Micro 5.1 (src):
 kernel-source-rt-5.3.18-150300.166.1
SUSE Linux Enterprise Micro 5.2 (src):
 kernel-source-rt-5.3.18-150300.166.1
SUSE Linux Enterprise Micro for Rancher 5.2 (src):
 kernel-source-rt-5.3.18-150300.166.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 7 Maintenance Automation 2024-05-03 08:37:48 UTC

SUSE-SU-2024:1489-1: An update that solves 157 vulnerabilities, contains five features and has four security fixes can now be installed.

Category: security (important)
Bug References: 1184942, 1186060, 1192145, 1194516, 1208995, 1209635, 1209657, 1212514, 1213456, 1217987, 1217988, 1217989, 1218336, 1218447, 1218479, 1218562, 1219170, 1219264, 1220320, 1220340, 1220366, 1220400, 1220411, 1220413, 1220414, 1220425, 1220426, 1220429, 1220432, 1220442, 1220445, 1220465, 1220468, 1220475, 1220484, 1220486, 1220487, 1220516, 1220521, 1220528, 1220529, 1220532, 1220554, 1220556, 1220557, 1220560, 1220561, 1220566, 1220575, 1220580, 1220583, 1220611, 1220615, 1220621, 1220625, 1220630, 1220631, 1220638, 1220639, 1220640, 1220641, 1220662, 1220663, 1220669, 1220670, 1220677, 1220678, 1220685, 1220687, 1220688, 1220692, 1220697, 1220703, 1220706, 1220733, 1220734, 1220739, 1220743, 1220745, 1220749, 1220751, 1220753, 1220758, 1220759, 1220764, 1220768, 1220769, 1220777, 1220779, 1220785, 1220790, 1220794, 1220824, 1220826, 1220829, 1220836, 1220846, 1220850, 1220861, 1220871, 1220883, 1220946, 1220954, 1220969, 1220979, 1220982, 1220985, 1220987, 1221015, 1221044, 1221058, 1221061, 1221077, 1221088, 1221276, 1221293, 1221532, 1221534, 1221541, 1221548, 1221552, 1221575, 1221605, 1221606, 1221608, 1221830, 1221931, 1221932, 1221934, 1221935, 1221949, 1221952, 1221965, 1221966, 1221969, 1221973, 1221974, 1221978, 1221989, 1221990, 1221991, 1221992, 1221993, 1221994, 1221996, 1221997, 1221998, 1221999, 1222000, 1222001, 1222002, 1222003, 1222004, 1222117, 1222422, 1222585, 1222619, 1222660, 1222664, 1222669, 1222706
CVE References: CVE-2020-36780, CVE-2020-36781, CVE-2020-36782, CVE-2020-36783, CVE-2021-23134, CVE-2021-29155, CVE-2021-46908, CVE-2021-46909, CVE-2021-46911, CVE-2021-46914, CVE-2021-46917, CVE-2021-46918, CVE-2021-46919, CVE-2021-46920, CVE-2021-46921, CVE-2021-46922, CVE-2021-46930, CVE-2021-46931, CVE-2021-46933, CVE-2021-46938, CVE-2021-46939, CVE-2021-46943, CVE-2021-46944, CVE-2021-46950, CVE-2021-46951, CVE-2021-46956, CVE-2021-46958, CVE-2021-46959, CVE-2021-46960, CVE-2021-46961, CVE-2021-46962, CVE-2021-46963, CVE-2021-46971, CVE-2021-46976, CVE-2021-46980, CVE-2021-46981, CVE-2021-46983, CVE-2021-46984, CVE-2021-46988, CVE-2021-46990, CVE-2021-46991, CVE-2021-46992, CVE-2021-46998, CVE-2021-47000, CVE-2021-47001, CVE-2021-47003, CVE-2021-47006, CVE-2021-47009, CVE-2021-47013, CVE-2021-47014, CVE-2021-47015, CVE-2021-47017, CVE-2021-47020, CVE-2021-47026, CVE-2021-47034, CVE-2021-47035, CVE-2021-47038, CVE-2021-47044, CVE-2021-47045, CVE-2021-47046, CVE-2021-47049, CVE-2021-47051, CVE-2021-47055, CVE-2021-47056, CVE-2021-47058, CVE-2021-47061, CVE-2021-47063, CVE-2021-47065, CVE-2021-47068, CVE-2021-47069, CVE-2021-47070, CVE-2021-47071, CVE-2021-47073, CVE-2021-47077, CVE-2021-47082, CVE-2021-47087, CVE-2021-47095, CVE-2021-47097, CVE-2021-47100, CVE-2021-47101, CVE-2021-47109, CVE-2021-47110, CVE-2021-47112, CVE-2021-47114, CVE-2021-47117, CVE-2021-47118, CVE-2021-47119, CVE-2021-47120, CVE-2021-47130, CVE-2021-47136, CVE-2021-47137, CVE-2021-47138, CVE-2021-47139, CVE-2021-47141, CVE-2021-47142, CVE-2021-47144, CVE-2021-47150, CVE-2021-47153, CVE-2021-47160, CVE-2021-47161, CVE-2021-47164, CVE-2021-47165, CVE-2021-47166, CVE-2021-47167, CVE-2021-47168, CVE-2021-47169, CVE-2021-47170, CVE-2021-47171, CVE-2021-47172, CVE-2021-47173, CVE-2021-47174, CVE-2021-47175, CVE-2021-47176, CVE-2021-47177, CVE-2021-47179, CVE-2021-47180, CVE-2021-47181, CVE-2021-47183, CVE-2021-47185, CVE-2021-47189, CVE-2022-0487, CVE-2022-4744, CVE-2022-48626, CVE-2023-0160, CVE-2023-1192, CVE-2023-28746, CVE-2023-35827, CVE-2023-52454, CVE-2023-52469, CVE-2023-52470, CVE-2023-52474, CVE-2023-52476, CVE-2023-52477, CVE-2023-52492, CVE-2023-52500, CVE-2023-52508, CVE-2023-52509, CVE-2023-52572, CVE-2023-52575, CVE-2023-52583, CVE-2023-52590, CVE-2023-52591, CVE-2023-52607, CVE-2023-52628, CVE-2023-6270, CVE-2023-6356, CVE-2023-6531, CVE-2023-6535, CVE-2023-6536, CVE-2023-7042, CVE-2023-7192, CVE-2024-22099, CVE-2024-26600, CVE-2024-26614, CVE-2024-26642, CVE-2024-26704, CVE-2024-26733
Jira References: PED-5759, SLE-13706, SLE-15131, SLE-15172, SLE-15176
Maintenance Incident: [SUSE:Maintenance:33221](https://smelt.suse.de/incident/33221/)
Sources used:
SUSE Linux Enterprise Server for SAP Applications 15 SP3 (src):
 kernel-syms-5.3.18-150300.59.158.1, kernel-obs-build-5.3.18-150300.59.158.1, kernel-source-5.3.18-150300.59.158.1, kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
SUSE Enterprise Storage 7.1 (src):
 kernel-syms-5.3.18-150300.59.158.1, kernel-obs-build-5.3.18-150300.59.158.1, kernel-source-5.3.18-150300.59.158.1, kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
SUSE Linux Enterprise Micro 5.1 (src):
 kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
SUSE Linux Enterprise Micro 5.2 (src):
 kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
SUSE Linux Enterprise Micro for Rancher 5.2 (src):
 kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
openSUSE Leap 15.3 (src):
 kernel-syms-5.3.18-150300.59.158.1, kernel-livepatch-SLE15-SP3_Update_43-1-150300.7.3.5, kernel-obs-build-5.3.18-150300.59.158.1, kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5, kernel-source-5.3.18-150300.59.158.1, kernel-obs-qa-5.3.18-150300.59.158.1
SUSE Linux Enterprise Live Patching 15-SP3 (src):
 kernel-livepatch-SLE15-SP3_Update_43-1-150300.7.3.5
SUSE Linux Enterprise High Performance Computing LTSS 15 SP3 (src):
 kernel-syms-5.3.18-150300.59.158.1, kernel-obs-build-5.3.18-150300.59.158.1, kernel-source-5.3.18-150300.59.158.1, kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5
SUSE Linux Enterprise Server 15 SP3 LTSS 15-SP3 (src):
 kernel-syms-5.3.18-150300.59.158.1, kernel-obs-build-5.3.18-150300.59.158.1, kernel-source-5.3.18-150300.59.158.1, kernel-default-base-5.3.18-150300.59.158.1.150300.18.92.5

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 8 Andrea Mattiazzo 2024-05-31 13:05:41 UTC

All done, closing.